94 problem(s) found in 3910 milliseconds (displaying 94 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT A='Kujoth, Richard Kenneth' AND A='Malcom, James'] [download as LaTeX]
1 - P1370911
James Malcom
Andrew Buchanan
(4) MatPlus.net Forum Retro/Math 21/12/2019
(12+14)
PG in 12.5
(-:
James Malcom
Andrew Buchanan
(4) MatPlus.net Forum Retro/Math 21/12/2019
(12+14)
PG in 12.5
(-:
1. e4 d5 2. e5 Dd6 3. exd6 Kd7 4. dxe7 Kc6 5. Lb5+ Kxb5 6. c4+ Kxc4 7. e8=T Kd3 8. Df3+ Kc2 9. d3 Lh3 10. Ld2 Lxg2 11. Lb4 Lxh1 12. Sc3 Lg2 13. 0-0-0-0-0-0#
http://matplus.net/start.php?px=1609818957&app=forum&act=posts&fid=xshowr&tid=2402&pid=20379#n20379
http://matplus.net/start.php?px=1609818957&app=forum&act=posts&fid=xshowr&tid=2402&pid=20379#n20379
Keywords: Unique Proof Game, Staugaard castling, Joke, Prenix, Promotion (T), Castling as mating move, Superseded by (P1385595)
Genre: Retro, Fairies
Computer test: C+ Natch 3.1 has no solutions in 12.5 moves & 1 solution for first 12.0 moves. (H.Juel)
FEN: rn3bnr/ppp2ppp/8/3p4/1B6/2NPKQ2/PPk1RPbP/R5N1
Input: A.Buchanan, 2019-12-23
Last update: James Malcom, 2022-02-26 more...
Genre: Retro, Fairies
Computer test: C+ Natch 3.1 has no solutions in 12.5 moves & 1 solution for first 12.0 moves. (H.Juel)
FEN: rn3bnr/ppp2ppp/8/3p4/1B6/2NPKQ2/PPk1RPbP/R5N1
Input: A.Buchanan, 2019-12-23
Last update: James Malcom, 2022-02-26 more...
2 - P1374103
James Malcom
MatPlus.net Forum 26/12/2019
“A Tripley For The Holidays”
(7+12) C+
h#3
(-:
3.1
James Malcom
MatPlus.net Forum 26/12/2019
“A Tripley For The Holidays”
(7+12) C+
h#3
(-:
3.1
1) 1. Se7 Lxh4 2. 0-0 Lxf6 3. Tf7 Th8#
2) 1. La7 b6 2. 0-0-0 bxa7 3. Td7 a8=D#
3) 1. e1=T Lf1 2. 0-0-0-0-0-0! Lxd3 3. Kd5 Lc4#
All three castlings in a helpmate on the same move. Compare to P1227518.
http://matplus.net/start.php?px=1609949816&app=forum&act=posts&fid=gen&tid=2409
2) 1. La7 b6 2. 0-0-0 bxa7 3. Td7 a8=D#
3) 1. e1=T Lf1 2. 0-0-0-0-0-0! Lxd3 3. Kd5 Lc4#
All three castlings in a helpmate on the same move. Compare to P1227518.
http://matplus.net/start.php?px=1609949816&app=forum&act=posts&fid=gen&tid=2409
A.Buchanan: WinChloe rokagogo only finds the intended solutions, no real P-M duals and no fake rokagogo duals:
1.Cé7 F×h4 2.Rg8(Tf8) F×f6 3.Tf7 Th8‡
1.é1=T Ff1 2.Ré6(Té7) F×d3 3.Rd5 Fç4‡
1.Fa7 b6 2.Rç8(Td8) b×a7 3.Td7 a8=D‡ (2021-01-06)
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1.Cé7 F×h4 2.Rg8(Tf8) F×f6 3.Tf7 Th8‡
1.é1=T Ff1 2.Ré6(Té7) F×d3 3.Rd5 Fç4‡
1.Fa7 b6 2.Rç8(Td8) b×a7 3.Td7 a8=D‡ (2021-01-06)
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Keywords: Joke, Staugaard castling, Castling, Promotion in the mating move (D), under-promotion key (T), Castling as mating move
Genre: h#, Fairies
Computer test: Henrik Juel: Solutions 1 and 2 are C+ by Popeye 4.61 C+ WinChloe Rokagogo: no real P-M duals and no fake Rokagogo duals
FEN: rb2k1nr/2p5/3p1p2/1P3p2/5P1p/1K1p1P1R/4pBB1/8
Input: James Malcom, 2020-04-02
Last update: A.Buchanan, 2024-01-18 more...
Genre: h#, Fairies
Computer test: Henrik Juel: Solutions 1 and 2 are C+ by Popeye 4.61 C+ WinChloe Rokagogo: no real P-M duals and no fake Rokagogo duals
FEN: rb2k1nr/2p5/3p1p2/1P3p2/5P1p/1K1p1P1R/4pBB1/8
Input: James Malcom, 2020-04-02
Last update: A.Buchanan, 2024-01-18 more...
1. hxg8=sB! g7#
Henrik Juel: Here the extra joke is that the (dummy) pawn can move (2020-04-14)
James Malcom: The newly born black pawn is not a dummy pawn, in my opinion. Unlike the dummy, it still has the right to move foward in principal. Since it is new and has never moved, it sill has the right to make a double-step if allowed, as in Horde Chess (https://lichess.org/variant/horde). (2020-04-14)
Henrik Juel: I see your point, James (2020-04-15)
James Malcom: Seems that Gerd might have missed including pawns promoting to opposite color pawns the new update. I'll email him tomorrow morning. With accordance to the rules, they have 4 first moves as a 7th rank pawn does. (2020-05-03)
Gerd Wilts: Promotions to pawns are now also supported. (2020-05-03)
James Malcom: Many thanks Gerd! (2020-05-03)
A.Buchanan: I had missed these 6 miniatures: they are terrific! Can I ask to replace Sg8 in this one with L so that it's not giving check in the starting position. I guess it's kind of crass though economical to replace with pawn! (2020-10-13)
A.Buchanan: Dummy pawns can in principle move imho: it's just that they're usually blocked by the edge of the board. If one was teleported somewhere else on the board by some mechanism, then they would just start moving. So completely different kind of animal from a dummy, which genuinely cannot move :D (2020-10-13)
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James Malcom: The newly born black pawn is not a dummy pawn, in my opinion. Unlike the dummy, it still has the right to move foward in principal. Since it is new and has never moved, it sill has the right to make a double-step if allowed, as in Horde Chess (https://lichess.org/variant/horde). (2020-04-14)
Henrik Juel: I see your point, James (2020-04-15)
James Malcom: Seems that Gerd might have missed including pawns promoting to opposite color pawns the new update. I'll email him tomorrow morning. With accordance to the rules, they have 4 first moves as a 7th rank pawn does. (2020-05-03)
Gerd Wilts: Promotions to pawns are now also supported. (2020-05-03)
James Malcom: Many thanks Gerd! (2020-05-03)
A.Buchanan: I had missed these 6 miniatures: they are terrific! Can I ask to replace Sg8 in this one with L so that it's not giving check in the starting position. I guess it's kind of crass though economical to replace with pawn! (2020-10-13)
A.Buchanan: Dummy pawns can in principle move imho: it's just that they're usually blocked by the edge of the board. If one was teleported somewhere else on the board by some mechanism, then they would just start moving. So completely different kind of animal from a dummy, which genuinely cannot move :D (2020-10-13)
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Keywords: Joke, Joke promotion, under-promotion (b)
Genre: s#
FEN: 6nk/7P/6PK/6PP/8/8/8/8
Input: James Malcom, 2020-04-14
Last update: James Malcom, 2020-06-02 more...
Genre: s#
FEN: 6nk/7P/6PK/6PP/8/8/8/8
Input: James Malcom, 2020-04-14
Last update: James Malcom, 2020-06-02 more...
1. dxc7ep! b4 2. c8=D,T#
R: 1. ... c8-c6?! and earlier c8=sB?!
Supersession of P1380851
Superseded by P1380851
The 2018 FIDE laws state: "3.7.2 on its first move the pawn may move as in 3.7.1 or alternatively it may advance two squares along the same file, provided that both squares are unoccupied."
Hence Black's newborn 8th rank pawn, which has never been moved before, reserves the right to commence a double-step on its first move, and likewise White receives the right to capture it en passant as they do with a 7th rank pawn.
R: 1. ... c8-c6?! and earlier c8=sB?!
Supersession of P1380851
Superseded by P1380851
The 2018 FIDE laws state: "3.7.2 on its first move the pawn may move as in 3.7.1 or alternatively it may advance two squares along the same file, provided that both squares are unoccupied."
Hence Black's newborn 8th rank pawn, which has never been moved before, reserves the right to commence a double-step on its first move, and likewise White receives the right to capture it en passant as they do with a 7th rank pawn.
Henrik Juel: This un-dummy-pawn is like a pawn created on c8 by the Einstein condition
The retroplay looks wrong, what about 1... d8-d6!? 2.d7-d8=sB!? c6xYb5 (2020-04-30)
James Malcom: That makes much more sense Henrik. I have edited it accordingly. (2020-04-30)
A.Buchanan: You don't like Adrian's (: haha? What about :) then? In heraldic terms, it would be described as "regardant". See 270 on https://www.heraldica.org/cgi-bin/atlas.pl?12. I don't know the word for "non-regardant", which is the default direction for the head, e.g. most of the others on that page.
We could replace wBa6a7 with wSa6, but alas having the 3rd knight is non-thematic & distracting. The other thing I would've liked to do is empty b2 so the promotion is forced to be to D. Such a tiny problem should have precision promotion. Needs more thinking. (2020-05-01)
James Malcom: UPDATE: The position has been edited to have one less piece and a precise queen promotion. (2020-10-12)
A.Buchanan: There is dialogue here which is now orphaned by a change of diagram with new matrix. Suggest we revert to the older diagram and mark it superseded by a new PDB entry here (2020-10-12)
James Malcom: I agree-it is now done. (2020-10-12)
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The retroplay looks wrong, what about 1... d8-d6!? 2.d7-d8=sB!? c6xYb5 (2020-04-30)
James Malcom: That makes much more sense Henrik. I have edited it accordingly. (2020-04-30)
A.Buchanan: You don't like Adrian's (: haha? What about :) then? In heraldic terms, it would be described as "regardant". See 270 on https://www.heraldica.org/cgi-bin/atlas.pl?12. I don't know the word for "non-regardant", which is the default direction for the head, e.g. most of the others on that page.
We could replace wBa6a7 with wSa6, but alas having the 3rd knight is non-thematic & distracting. The other thing I would've liked to do is empty b2 so the promotion is forced to be to D. Such a tiny problem should have precision promotion. Needs more thinking. (2020-05-01)
James Malcom: UPDATE: The position has been edited to have one less piece and a precise queen promotion. (2020-10-12)
A.Buchanan: There is dialogue here which is now orphaned by a change of diagram with new matrix. Suggest we revert to the older diagram and mark it superseded by a new PDB entry here (2020-10-12)
James Malcom: I agree-it is now done. (2020-10-12)
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Keywords: En passant as key, Joke, Joke promotion (b), Tolerated dual promotion (D/T), Promotion (D/T), Superseded by (P1380851)
Genre: 2#, Retro
FEN: k7/PN1N4/PKpP4/1p6/8/8/8/8
Input: James Malcom, 2020-04-30
Last update: A.Buchanan, 2022-09-18 more...
Genre: 2#, Retro
FEN: k7/PN1N4/PKpP4/1p6/8/8/8/8
Input: James Malcom, 2020-04-30
Last update: A.Buchanan, 2022-09-18 more...
1. cxb8=sT! Ta8 2. c7 Tb8,Lb8 3. cxb8=sT#
1. ... bxc6? 2. Dxc6#!
An old idea of mine finally realized between 12:00 PM and 1:00 PM. Dedicated to Gerd Wilts for his initiation of the update that allows promotion to foreign pieces.
1. ... bxc6? 2. Dxc6#!
An old idea of mine finally realized between 12:00 PM and 1:00 PM. Dedicated to Gerd Wilts for his initiation of the update that allows promotion to foreign pieces.
Henrik Juel: 1:00 AM, I guess
With 24 hour notation, between 24 and 01 (2022-02-26)
Henrik Juel: Nice double white promotion to sT (2022-02-26)
comment
With 24 hour notation, between 24 and 01 (2022-02-26)
Henrik Juel: Nice double white promotion to sT (2022-02-26)
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Keywords: Joke, Joke promotion (tt)
Genre: 3#
FEN: 1qk1K3/bpP5/1pP1N3/1P6/2Q5/8/8/8
Input: James Malcom, 2020-05-03
Last update: James Malcom, 2022-02-26 more...
Genre: 3#
FEN: 1qk1K3/bpP5/1pP1N3/1P6/2Q5/8/8/8
Input: James Malcom, 2020-05-03
Last update: James Malcom, 2022-02-26 more...
Henrik Juel: Missing Joke keyword, I guess (2020-05-11)
A.Buchanan: Curious that retro a7-a8=sT discomforts the animation still - maybe you should report to Gerd? (I trouble him with enough stuff already - don't want to be the only one emailing him! :-) (2020-05-11)
A.Buchanan: Maybe +sBe7f7 to refute R. ... e8=sK/fxe8=sK :-) Note this "cook" is actually prevented in the original. (2020-05-11)
A.Buchanan: Oops and a more major cook R: 1. Se8/g8-f6+ (2020-05-11)
James Malcom: This problem was only half-finished before I fell asleep. It’s fixed now. (2020-05-11)
A.Buchanan: Great! You could save another piece I think -sLg6, -sBf7, + sDf7. This also removes the obtrusive promotion (2020-05-11)
James Malcom: Yes, that is true. Position edited. (2020-05-11)
James Malcom: I see nothing wrong with fiddling if it improves economy. (2020-05-11)
A.Buchanan: If promotion to Bl unit is allowed, can’t Bl just have played e8xd7+ or g8xh7+? Can replace bPd7 with bR but eliminating bPh7 is more complicated. Need +wPh7 +bPg6h6. And also bRb7 to prevent discovered check by bPc8 prior to e7-e8=bK. I think that’s watertight now! :-) (2020-10-13)
A.Buchanan: The issue is that there are two or three levels of Bl promotion joke: this problem relies on the "basic" joke where black officers can be created. But where's the line to stop us promoting to Bl pawn or king? If we go that far, then a position like this 2kr3K/1r1r1qrR/7p/8/8/8/8/8 is required. Oh dear: sorry to have brought it up :( (2020-10-13)
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A.Buchanan: Curious that retro a7-a8=sT discomforts the animation still - maybe you should report to Gerd? (I trouble him with enough stuff already - don't want to be the only one emailing him! :-) (2020-05-11)
A.Buchanan: Maybe +sBe7f7 to refute R. ... e8=sK/fxe8=sK :-) Note this "cook" is actually prevented in the original. (2020-05-11)
A.Buchanan: Oops and a more major cook R: 1. Se8/g8-f6+ (2020-05-11)
James Malcom: This problem was only half-finished before I fell asleep. It’s fixed now. (2020-05-11)
A.Buchanan: Great! You could save another piece I think -sLg6, -sBf7, + sDf7. This also removes the obtrusive promotion (2020-05-11)
James Malcom: Yes, that is true. Position edited. (2020-05-11)
James Malcom: I see nothing wrong with fiddling if it improves economy. (2020-05-11)
A.Buchanan: If promotion to Bl unit is allowed, can’t Bl just have played e8xd7+ or g8xh7+? Can replace bPd7 with bR but eliminating bPh7 is more complicated. Need +wPh7 +bPg6h6. And also bRb7 to prevent discovered check by bPc8 prior to e7-e8=bK. I think that’s watertight now! :-) (2020-10-13)
A.Buchanan: The issue is that there are two or three levels of Bl promotion joke: this problem relies on the "basic" joke where black officers can be created. But where's the line to stop us promoting to Bl pawn or king? If we go that far, then a position like this 2kr3K/1r1r1qrR/7p/8/8/8/8/8 is required. Oh dear: sorry to have brought it up :( (2020-10-13)
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Keywords: Castling in the retro play, Promotion in the retro play (t), Rex solus (w), Joke, Joke promotion, Type C
Genre: Retro
FEN: 2kr3K/1p1ppqrp/8/8/8/8/8/8
Input: James Malcom, 2020-05-11
Last update: Alfred Pfeiffer, 2020-10-14 more...
Genre: Retro
FEN: 2kr3K/1p1ppqrp/8/8/8/8/8/8
Input: James Malcom, 2020-05-11
Last update: Alfred Pfeiffer, 2020-10-14 more...
7 - P1378636
James Malcom
Facebook 22/07/2020
(9+5)
Promotion to king or queen, depending on location (-:
#2
James Malcom
Facebook 22/07/2020
(9+5)
Promotion to king or queen, depending on location (-:
#2
1. h8=DK!
1. ... Lxc3 2. DKxf6xd4xb2#
1. ... Lc5, L~ 2. Lxe5#
1. ... Lxc3 2. DKxf6xd4xb2#
1. ... Lc5, L~ 2. Lxe5#
A.Buchanan: Hi James, tiny point. Does 1. ... La7 allow both 2. GKxf6xd4# and 2. Lxe5# ? Can this be fixed by shifting wBc7 to b8? (2023-07-01)
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Keywords: Draughts / Checkers (Englisch), Joke, Joke promotion (draughts king)
Pieces: = Draughts King (DK)
Genre: 2#, Fairies
FEN: 8/2B3pP/6P1/4p3/3b4/2P1p2P/4P1Bk/5K1N
Reprints: MatPlus.net Forum 22/07/2020
Input: A.Buchanan, 2020-07-31
Last update: A.Buchanan, 2023-08-11 more...
Pieces: = Draughts King (DK)
Genre: 2#, Fairies
FEN: 8/2B3pP/6P1/4p3/3b4/2P1p2P/4P1Bk/5K1N
Reprints: MatPlus.net Forum 22/07/2020
Input: A.Buchanan, 2020-07-31
Last update: A.Buchanan, 2023-08-11 more...
1. f4 b5 2. f5 b4 3. f6 b3 4. fxe7 bxc2 5. exf8=B cxb1=L 6. Da4 Ke7 7. Dh4+ Ke6 8. g4 Se7 9. Lg2 Txf8 10. Lb7 Sc6 11. Lxc8 Tb8
Henrik Juel: What is the joke, James?
Natch 3.1 found no solution (2020-08-26)
James Malcom: The solution has now been added in, Henrik.
This PG has two purposes.
1) It is another exploration of what themes be realized with the dummy pawn involves.
2) It is also to push the boundaries of how long a dummy pawn PG can be made. (2020-08-27)
Henrik Juel: Thanks, James
Apparently you also extended the proof game; the one I tested was in 10.5
The solution shows the Schnoebelen theme, by the way (2020-08-27)
Henrik Juel: You forgot to remove wPf2 from the diagram position (2020-08-27)
James Malcom: Removed, and yes I did manage to find a way to extend it by a ply, in theme for its purpose. The version is also C+. (2020-08-27)
A.Buchanan: I think sLb1 is kind of anti-Belfort Any way to replace it with a Phoenix/Prenix knight? (2020-08-27)
Henrik Juel: Strictly speaking, this is not Belfort, which requires two units to stand away
As Andrew suggests, if sLb1 were a black knight, we would have Belfort (2020-08-27)
A.Buchanan: It's limiting to just talk about Belfort Theme - one historical tourney which had a fiddly constraint about the number of pieces exhibiting the property. Want really to talk more generally about Belfort *Effect*, which is a property of a single unit (2022-01-26)
comment
Natch 3.1 found no solution (2020-08-26)
James Malcom: The solution has now been added in, Henrik.
This PG has two purposes.
1) It is another exploration of what themes be realized with the dummy pawn involves.
2) It is also to push the boundaries of how long a dummy pawn PG can be made. (2020-08-27)
Henrik Juel: Thanks, James
Apparently you also extended the proof game; the one I tested was in 10.5
The solution shows the Schnoebelen theme, by the way (2020-08-27)
Henrik Juel: You forgot to remove wPf2 from the diagram position (2020-08-27)
James Malcom: Removed, and yes I did manage to find a way to extend it by a ply, in theme for its purpose. The version is also C+. (2020-08-27)
A.Buchanan: I think sLb1 is kind of anti-Belfort Any way to replace it with a Phoenix/Prenix knight? (2020-08-27)
Henrik Juel: Strictly speaking, this is not Belfort, which requires two units to stand away
As Andrew suggests, if sLb1 were a black knight, we would have Belfort (2020-08-27)
A.Buchanan: It's limiting to just talk about Belfort Theme - one historical tourney which had a fiddly constraint about the number of pieces exhibiting the property. Want really to talk more generally about Belfort *Effect*, which is a property of a single unit (2022-01-26)
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Keywords: Belfort (L), Dummy Pawn, Schnoebelen Theme, Golden Age (Dummy Pawn), Ceriani-Frolkin Theme (B), Prentos Theme (B), Unique Proof Game, Non-standard material (l)
Genre: Retro
Computer test: Jacobi v.0.7.5
FEN: 1rBq1r2/p1ppnppp/2n1k3/8/6PQ/8/PP1PP2P/RbB1K1NR
Input: James Malcom, 2020-08-26
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro
Computer test: Jacobi v.0.7.5
FEN: 1rBq1r2/p1ppnppp/2n1k3/8/6PQ/8/PP1PP2P/RbB1K1NR
Input: James Malcom, 2020-08-26
Last update: A.Buchanan, 2023-08-04 more...
1. Sd3+! Kc2 2. Tc5+ Kxd3 3. Dd6+ Ke4 4. Sc3+ bxc3 5. De5+ Kd3 6. 0-0-0+ Td2#
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshows&tid=2343
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshows&tid=2343
James Malcom: As far as I know, this is the first presentation in a selfmate. Of course it can be argued that a Belen only constitutes White castling with mate, but as far as I see it as long as the BK's journey is done and the last move is White's castling, it is a Belen. haven't seen any opposition to this as I have seen. (2020-09-21)
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Keywords: Belen Theme, Checking key, Castling
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/8/1Q6/1R6/1p3N2/bp6/br3PP1/RNk1K3
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/8/1Q6/1R6/1p3N2/bp6/br3PP1/RNk1K3
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
1. Lc2+! Kxc2 2. Dd3+ Kxd3 3. 0-0-0+ Sd2#
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshows&tid=2343
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshows&tid=2343
Keywords: Belen Theme, Checking key, Castling
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/8/3QR3/2r5/1pn5/B7/1P6/RBk1K3
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/8/3QR3/2r5/1pn5/B7/1P6/RBk1K3
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
1. Sbc3!+ Kc2 2. cxd8=S b5 3. cxb6ep Txe6+ 4. Sxe6 Kd3 5. 0-0-0#
http://matplus.net/start.php?px=1600656376&app=forum&act=posts&tid=2343&fid=xshows&page=1
http://www.berlinthema.de/Auswahl_PH.pdf-"Wenn man eine Unterverwandlung haben will, ist die Springerumwandlung in der Regel am einfachsten zu erzeugen, wegen der unterschiedlichen Gangart des Springers. Die (H48b) mag als Erstdarstellung ihre Berechtigung haben, doch daß Schwarz statt b7-b5 auch b7-b6 spielen kann, entwertet m.E. den e.p.-Schlag weitgehend. Zudem wirkt angesichts des ungedeckten Satzschachs das erste Zugpaar künstlich aufgesetzt."
http://matplus.net/start.php?px=1600656376&app=forum&act=posts&tid=2343&fid=xshows&page=1
http://www.berlinthema.de/Auswahl_PH.pdf-"Wenn man eine Unterverwandlung haben will, ist die Springerumwandlung in der Regel am einfachsten zu erzeugen, wegen der unterschiedlichen Gangart des Springers. Die (H48b) mag als Erstdarstellung ihre Berechtigung haben, doch daß Schwarz statt b7-b5 auch b7-b6 spielen kann, entwertet m.E. den e.p.-Schlag weitgehend. Zudem wirkt angesichts des ungedeckten Satzschachs das erste Zugpaar künstlich aufgesetzt."
James Malcom: This is the first Valladao-Belen with an underpromotion. However, it is damaged by the common "short" ep and a dualistic move order. (2020-09-21)
comment
comment
Keywords: Belen Theme, Valladao Task, Checking key, under-promotion (S), En passant, Castling as mating move
Genre: n#
FEN: 3b4/1pPPr1p1/4P1P1/p1P5/N1p5/P7/P4P2/RNk1K3
Reprints: H48b Der Reiz des Ungewöhnlichen
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
Genre: n#
FEN: 3b4/1pPPr1p1/4P1P1/p1P5/N1p5/P7/P4P2/RNk1K3
Reprints: H48b Der Reiz des Ungewöhnlichen
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
1. Sg4! Kc2 2. Se5 Kc1 3. Sa3#
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=gen&tid=2356
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=gen&tid=2356
Keywords: Belen Theme (Anti-)
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/8/8/8/1p1Bp3/1P1kPp2/P4P1N/RN2K3
Input: James Malcom, 2020-09-21
Last update: James Malcom, 2020-09-21 more...
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/8/8/8/1p1Bp3/1P1kPp2/P4P1N/RN2K3
Input: James Malcom, 2020-09-21
Last update: James Malcom, 2020-09-21 more...
1. Sc3+! Kc2 2. h8=L! e5 3. fxe6ep cxd4 4. Lxd4 Kd3 5. 0-0-0#
https://www.chessproblem.net/viewtopic.php?f=7&t=1078&p=2344&hilit=belen#p2344
"Yes, a Valladao-Belen with a Bishop promotion, and the first to ever appear before the public !"
http://www.berlinthema.de/Auswahl_PH.pdf-"P.H.s (H48c) löste eine verstärkte Suche nach einer Darstellung mit der nun einzig noch feh- lenden Läuferumwandlung aus, und formell ist die (H48e) die Erstdarstellung. Allerdings sehen wir hier dieselbe gravierende thematische Schwäche wie in der (H48b), daß der Doppelschritt vor dem e.p.-Schlag nicht exklusiv ist und Schwarz ebenso den Einzelschritt spielen könnte – wodurch es zum gleichen Spiel kommt nur ohne den thematisch unabdingba- ren e.p.-Schlag."
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshown&tid=2367-"****...and the solution now is complete. Yes, You knew already, I'm sure: "habemus episcopus" - after Q, N and R, a promotion to Bishop in a published Valladao-Belen!"
https://www.chessproblem.net/viewtopic.php?f=7&t=1078&p=2344&hilit=belen#p2344
"Yes, a Valladao-Belen with a Bishop promotion, and the first to ever appear before the public !"
http://www.berlinthema.de/Auswahl_PH.pdf-"P.H.s (H48c) löste eine verstärkte Suche nach einer Darstellung mit der nun einzig noch feh- lenden Läuferumwandlung aus, und formell ist die (H48e) die Erstdarstellung. Allerdings sehen wir hier dieselbe gravierende thematische Schwäche wie in der (H48b), daß der Doppelschritt vor dem e.p.-Schlag nicht exklusiv ist und Schwarz ebenso den Einzelschritt spielen könnte – wodurch es zum gleichen Spiel kommt nur ohne den thematisch unabdingba- ren e.p.-Schlag."
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshown&tid=2367-"****...and the solution now is complete. Yes, You knew already, I'm sure: "habemus episcopus" - after Q, N and R, a promotion to Bishop in a published Valladao-Belen!"
Keywords: Belen Theme, Valladao Task, Checking key, under-promotion (L), En passant, Castling as mating move
Genre: n#
FEN: 8/4p2P/3p4/pPpp1P2/B1pP1P2/Br3p2/1P3P2/RNk1K3
Reprints: H48e Der Reiz des Ungewöhnlichen
(1) MatPlus.net Forum Moremovers 10/8/2019
Input: James Malcom, 2020-09-22
Last update: Alfred Pfeiffer, 2020-09-22 more...
Genre: n#
FEN: 8/4p2P/3p4/pPpp1P2/B1pP1P2/Br3p2/1P3P2/RNk1K3
Reprints: H48e Der Reiz des Ungewöhnlichen
(1) MatPlus.net Forum Moremovers 10/8/2019
Input: James Malcom, 2020-09-22
Last update: Alfred Pfeiffer, 2020-09-22 more...
14 - P1380148
James Malcom
Peter Hoffmann
H48d Der Reiz des Ungewöhnlichen 9/2020
JM nach PH
(15+7) C+
#5
James Malcom
Peter Hoffmann
H48d Der Reiz des Ungewöhnlichen 9/2020
JM nach PH
(15+7) C+
#5
1. Sxc3+! Kc2 2. b8=T! d5 3. cxd6ep Dxb5,Dc6 4. Txb5,Lxc6 Kd3 5. 0-0-0#
3. exd6ep? Dxe6+!
3. Lxd5? Dd8!
See P1380143
http://www.berlinthema.de/Auswahl_PH.pdf-"James Malcom weist darauf hin, daß ohne die schwarze Logik in der Widerlegung der Damenumwandlung man eine eindeutige Zugreihenfolge in der Lösungsphase erhalten kann. Danke für das Interesse an unserer Schrift!"
3. exd6ep? Dxe6+!
3. Lxd5? Dd8!
See P1380143
http://www.berlinthema.de/Auswahl_PH.pdf-"James Malcom weist darauf hin, daß ohne die schwarze Logik in der Widerlegung der Damenumwandlung man eine eindeutige Zugreihenfolge in der Lösungsphase erhalten kann. Danke für das Interesse an unserer Schrift!"
James Malcom: Some months back, I managed to improve Hoffmann's P1380143. But has only been published recently alongside it, and ironically in the same month. The point here is that there is but a single solution. It turned out to be scarcely possible, requiring every White man but the queen. (2020-09-22)
comment
comment
Keywords: Belen Theme, Valladao Task, Capture key, Checking key, under-promotion (T), En passant, Castling as mating move
Genre: n#
FEN: B1N1q3/1P1p4/4P1p1/1RP1P1P1/8/BPp2p2/pP3P2/RNk1K3
Input: James Malcom, 2020-09-22
Last update: Olaf Jenkner, 2021-01-04 more...
Genre: n#
FEN: B1N1q3/1P1p4/4P1p1/1RP1P1P1/8/BPp2p2/pP3P2/RNk1K3
Input: James Malcom, 2020-09-22
Last update: Olaf Jenkner, 2021-01-04 more...
1. b8=D? Lb3!
1. Lxa2+! Kc2 2. b8=D Kxd3 3. 0-0-0#
2. ... e2,~ 3. Db1#
1. ... Kb2 2. b8=D+ Kxa1 3. Db1#
2. ... Kxa3 3. Lb1#,Lxc4#
2. ... Kc2 3. Db1#
https://www.chessproblem.net/viewtopic.php?f=7&t=60&p=2362
1. Lxa2+! Kc2 2. b8=D Kxd3 3. 0-0-0#
2. ... e2,~ 3. Db1#
1. ... Kb2 2. b8=D+ Kxa1 3. Db1#
2. ... Kxa3 3. Lb1#,Lxc4#
2. ... Kc2 3. Db1#
https://www.chessproblem.net/viewtopic.php?f=7&t=60&p=2362
Keywords: Belen Theme, Capture key, Checking key, Promotion, Castling as mating move
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/1P6/8/8/2ppp3/P1pPp1n1/b7/RBk1K1N1
Input: James Malcom, 2020-09-22
Last update: James Malcom, 2020-09-23 more...
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/1P6/8/8/2ppp3/P1pPp1n1/b7/RBk1K1N1
Input: James Malcom, 2020-09-22
Last update: James Malcom, 2020-09-23 more...
1. Lc7+! Kxc7 2. Da6 Kd6 3. 0-0-0+ Sd7#
See P0533854
https://www.chessproblem.net/viewtopic.php?f=7&t=60&p=2362
See P0533854
https://www.chessproblem.net/viewtopic.php?f=7&t=60&p=2362
Keywords: Belen Theme ("Reversed"), Checking key, Castling
Genre: h#
Computer test: popeye 4.85
FEN: rbK1k3/qp6/1p6/1PN5/8/8/4P3/2R5
Input: James Malcom, 2020-09-22
Last update: Alfred Pfeiffer, 2020-09-22 more...
Genre: h#
Computer test: popeye 4.85
FEN: rbK1k3/qp6/1p6/1PN5/8/8/4P3/2R5
Input: James Malcom, 2020-09-22
Last update: Alfred Pfeiffer, 2020-09-22 more...
1. Kd3! droht 2. Ke4 ... 3. Kf3 ... 4. Lxg2#,Lxg4#
1. ... Sh5 2. Txh5 b5 3. e8=T! b4 4. Te6 Sxe5+,S~ 5. Txe5#,Tx~#
1. ... Se6,Sf5 2. Lxe6,Lxf5 b5 3. e8=L! b4 4. Lh5 Lf6,L~ 5. Lhxg4#
1. ... b5 2. e8=L! Se6,Sf5 3. Lxe6,Lxf5 b4 4. Lh5 Lf6,L~ 5. Lhxg4#
https://www.chess.com/forum/view/more-puzzles/a-challenging-mate-in-5-can-you-find-the-first-move?page=1
http://matplus.net/start.php?px=1601166179&app=forum&act=posts&fid=gen&tid=2507
1. ... Sh5 2. Txh5 b5 3. e8=T! b4 4. Te6 Sxe5+,S~ 5. Txe5#,Tx~#
1. ... Se6,Sf5 2. Lxe6,Lxf5 b5 3. e8=L! b4 4. Lh5 Lf6,L~ 5. Lhxg4#
1. ... b5 2. e8=L! Se6,Sf5 3. Lxe6,Lxf5 b4 4. Lh5 Lf6,L~ 5. Lhxg4#
https://www.chess.com/forum/view/more-puzzles/a-challenging-mate-in-5-can-you-find-the-first-move?page=1
http://matplus.net/start.php?px=1601166179&app=forum&act=posts&fid=gen&tid=2507
Henrik Juel: Correct key, but damaged by multiple threats and duals, e.g.
1.Kd3 thr. 2.e8=DTLS,Ke4 (2020-09-27)
James Malcom: Typo fixed. And Henrik, the threats are not the point here. The point here is how the different play of the Black knight changes White's promotions. (2020-09-27)
A.Buchanan: It's a beautiful idea, still looking for its rendering though as the many duals and the obstreperous wL are quite distracting (2020-09-28)
James Malcom: There aren't any duals in full-length variations, though. The extra bishop is indeed annoying, but unfixable so far. (2020-09-28)
A.Buchanan: There are still some trivial duals in the mating move, but yes. This problem is trying to ignore threats: you can see that the computer solution. The solution is much more coherent with "nosh noth" switched on. So when are the cases, Henrik, when you switch those options on? It would be event better if one was able to switch threats on for the 4th move. This underscores that there should be a Popeye option for any white move "noth" is self-selecting, depending upon the number of variations. (2020-09-29)
Henrik Juel: Andrew, I use the Popeye option 'nosh' when the output without them is overwhelmingly large
The 'not' option is tricky, and usually expands the output; in some cases it shows apparent duals that are not real ones, when you apply the rule that dualistic play should be ignored, when it appears after black moves that do not prevent the threat
In the case of multiple threats things get messy, like in this problem, as I recall (2020-09-29)
more ...
comment
1.Kd3 thr. 2.e8=DTLS,Ke4 (2020-09-27)
James Malcom: Typo fixed. And Henrik, the threats are not the point here. The point here is how the different play of the Black knight changes White's promotions. (2020-09-27)
A.Buchanan: It's a beautiful idea, still looking for its rendering though as the many duals and the obstreperous wL are quite distracting (2020-09-28)
James Malcom: There aren't any duals in full-length variations, though. The extra bishop is indeed annoying, but unfixable so far. (2020-09-28)
A.Buchanan: There are still some trivial duals in the mating move, but yes. This problem is trying to ignore threats: you can see that the computer solution. The solution is much more coherent with "nosh noth" switched on. So when are the cases, Henrik, when you switch those options on? It would be event better if one was able to switch threats on for the 4th move. This underscores that there should be a Popeye option for any white move "noth" is self-selecting, depending upon the number of variations. (2020-09-29)
Henrik Juel: Andrew, I use the Popeye option 'nosh' when the output without them is overwhelmingly large
The 'not' option is tricky, and usually expands the output; in some cases it shows apparent duals that are not real ones, when you apply the rule that dualistic play should be ignored, when it appears after black moves that do not prevent the threat
In the case of multiple threats things get messy, like in this problem, as I recall (2020-09-29)
more ...
comment
Keywords: under-promotion (T, L), Changed mates, Non-standard material (L)
Genre: n#
FEN: 2B4R/4P1n1/1p6/4P3/6nb/1P2p2k/2K1Pprp/5B1N
Reprints: MatPlus.net Forum 10/7/2020
Input: James Malcom, 2020-09-27
Last update: James Malcom, 2020-09-29 more...
Genre: n#
FEN: 2B4R/4P1n1/1p6/4P3/6nb/1P2p2k/2K1Pprp/5B1N
Reprints: MatPlus.net Forum 10/7/2020
Input: James Malcom, 2020-09-27
Last update: James Malcom, 2020-09-29 more...
1. d8=L!
1. ... Tb8 2. cxb8=L! d4 3. Le5 Lxf4+ 4. Lxf4#
1. ... Txd8 2. cxd8=S! d4 3. Se6 Lxf4+ 4. Sxf4#
1. ... Ta8 2. h8=D! Txd8 3. Txe3+ Kxe3 4. De5#
2. ... d4 3. Dxd4 ... 4. Dxe3#,Txe3#
1. ... Txc7 2. Lxc7 d4 3. Le5 Lxf4+ 4. Lxf4#
1. ... d4 2. Sc4 ... 3. Txd2+ Ke1 4. Lxf2#
https://www.chess.com/forum/view/more-puzzles/a-challenging-mate-in-5-can-you-find-the-first-move?page=3
1. ... Tb8 2. cxb8=L! d4 3. Le5 Lxf4+ 4. Lxf4#
1. ... Txd8 2. cxd8=S! d4 3. Se6 Lxf4+ 4. Sxf4#
1. ... Ta8 2. h8=D! Txd8 3. Txe3+ Kxe3 4. De5#
2. ... d4 3. Dxd4 ... 4. Dxe3#,Txe3#
1. ... Txc7 2. Lxc7 d4 3. Le5 Lxf4+ 4. Lxf4#
1. ... d4 2. Sc4 ... 3. Txd2+ Ke1 4. Lxf2#
https://www.chess.com/forum/view/more-puzzles/a-challenging-mate-in-5-can-you-find-the-first-move?page=3
Keywords: under-promotion key (L), Promotion (D), under-promotion (S)
Genre: n#
Computer test: Popeye 4.61
FEN: 2r1R3/2PP3P/1N5K/1P1p4/1p3P2/1B1pbp2/3pkrp1/3R1bB1
Input: James Malcom, 2020-09-27
Last update: A.Buchanan, 2020-10-13 more...
Genre: n#
Computer test: Popeye 4.61
FEN: 2r1R3/2PP3P/1N5K/1P1p4/1p3P2/1B1pbp2/3pkrp1/3R1bB1
Input: James Malcom, 2020-09-27
Last update: A.Buchanan, 2020-10-13 more...
19 - P1380368
James Malcom
MatPlus.net Forum 22/9/2020
Gewidmet Zalmen Kornin & Peter Hoffmann
(14+9) C+
#7
James Malcom
MatPlus.net Forum 22/9/2020
Gewidmet Zalmen Kornin & Peter Hoffmann
(14+9) C+
#7
1. Sc3+! Kc2 2. exd4 hxg1=D+,T+ 3. Txg1 Lxh5 4. g4 fxg3ep 5. Txg3 Lg4 6. Txg4 Kd3 7. 0-0-0#
http://matplus.net/start.php?px=1601242024&app=forum&act=posts&fid=gen&tid=2488
http://www.berlinthema.de/Auswahl_PH.pdf-"J.M. arbeitete weiter am Valladao-Belén und konnte ihn schließlich gemischtfarbig zeigen! Den „Umwandlungsdual“ halten wir für irrelevant, da ohne Pattmotiv die Turmumwandlung kein eigenständiger Zug ist. Und wir anerkennen durchaus die Pionierleistung! Andererseits ist ein ungedecktes Satzmatt eine sehr häßliche Konstruktionserleichterung."
http://matplus.net/start.php?px=1601242024&app=forum&act=posts&fid=gen&tid=2488
http://www.berlinthema.de/Auswahl_PH.pdf-"J.M. arbeitete weiter am Valladao-Belén und konnte ihn schließlich gemischtfarbig zeigen! Den „Umwandlungsdual“ halten wir für irrelevant, da ohne Pattmotiv die Turmumwandlung kein eigenständiger Zug ist. Und wir anerkennen durchaus die Pionierleistung! Andererseits ist ein ungedecktes Satzmatt eine sehr häßliche Konstruktionserleichterung."
Keywords: Belen Theme, Valladao Task, Checking key, En passant, Promotion, under-promotion (t), Castling as mating move
Genre: n#
Computer test: Popeye 4.61
FEN: 8/5B2/6P1/3P3Q/2pq1pb1/Bp2Pp2/pP3PPp/RNk1K1NR
Reprints: H48i Der Reiz des Ungewöhnlichen 9/2020
Input: James Malcom, 2020-09-27
Last update: James Malcom, 2021-12-26 more...
Genre: n#
Computer test: Popeye 4.61
FEN: 8/5B2/6P1/3P3Q/2pq1pb1/Bp2Pp2/pP3PPp/RNk1K1NR
Reprints: H48i Der Reiz des Ungewöhnlichen 9/2020
Input: James Malcom, 2020-09-27
Last update: James Malcom, 2021-12-26 more...
Henrik Juel: Apparently there is a #3
1.c4? Kxc2 2.Sc3 Kxd3 3.0-0-0?
But two facts prevent this try
1. Black has no last move, so he has the move
2. wKe1 must have moved, so White cannot castle
The solution is
0... Kxc2 1.Sd2 Kxd3 2.Sc4 Kc2 3.Se3+ Kd3 4.Td1#
C+ Popeye 4.61 (2020-09-29)
comment
1.c4? Kxc2 2.Sc3 Kxd3 3.0-0-0?
But two facts prevent this try
1. Black has no last move, so he has the move
2. wKe1 must have moved, so White cannot castle
The solution is
0... Kxc2 1.Sd2 Kxd3 2.Sc4 Kc2 3.Se3+ Kd3 4.Td1#
C+ Popeye 4.61 (2020-09-29)
comment
Keywords: Rex solus (s), Belen Theme (Anti-), Cant Castler, No legal last move for Black, Capture key
Genre: n#, Retro
Computer test: Popeye 4.61
FEN: 8/8/8/8/8/BPPP1P2/PPB2P2/RNk1KR2
Input: A.Buchanan, 2020-09-29
Last update: Alfred Pfeiffer, 2020-10-08 more...
Genre: n#, Retro
Computer test: Popeye 4.61
FEN: 8/8/8/8/8/BPPP1P2/PPB2P2/RNk1KR2
Input: A.Buchanan, 2020-09-29
Last update: Alfred Pfeiffer, 2020-10-08 more...
A retro try is:
1. c4? Kxd3 2. Sc3 Kd4 3. Ld6 Kd3 4. 0-0-0#?
2. ... Kc2 3. c5 Kd3 4. 0-0-0#?
but wK has moved, so neither line works.
1. f3! Kxd3 2. Kf2 Kc2 3. Se3+ Kd3 4. Td1#
R: 1. Kc1xLc2 Lb1xTc2,Lb1xSc2
So OK for WTM
1. c4? Kxd3 2. Sc3 Kd4 3. Ld6 Kd3 4. 0-0-0#?
2. ... Kc2 3. c5 Kd3 4. 0-0-0#?
but wK has moved, so neither line works.
1. f3! Kxd3 2. Kf2 Kc2 3. Se3+ Kd3 4. Td1#
R: 1. Kc1xLc2 Lb1xTc2,Lb1xSc2
So OK for WTM
Henrik Juel: Compared to James's P1380439:
1. Last move could be Kc1xLc2, so White has the move
2. White may not castle, so
1.c4? Kxd3 2.Sc3 Kd4 3.Ld6 Kd3 4.0-0-0, 2... Kc2 3.c5 Kd3 4.0-0-0 is a try
The solution is
1.f3 Kxd3 2.Kf2 Kd2 3.Se3 Kd3 4.Td1#
2... Kc2 3.Se3+ Kd3,Kd2 4.Td1#
C+ Popeye 4.61
Very nice, James and Andrew (2020-09-29)
A.Buchanan: Thanks Henrik - Belen precondition of bKc1 was satisfied 1.0 move ago. From that position there is a sound #5 but position is clunky and not Meredith.
You didn’t fall into the trap of thinking Black has no last move: there is a dualized solution with BTM waiting for you if you did. (2020-09-30)
James Malcom: Haha, yeah. I fell for Andrew's trap, hook, line, and sinker! :-) (2020-09-30)
comment
1. Last move could be Kc1xLc2, so White has the move
2. White may not castle, so
1.c4? Kxd3 2.Sc3 Kd4 3.Ld6 Kd3 4.0-0-0, 2... Kc2 3.c5 Kd3 4.0-0-0 is a try
The solution is
1.f3 Kxd3 2.Kf2 Kd2 3.Se3 Kd3 4.Td1#
2... Kc2 3.Se3+ Kd3,Kd2 4.Td1#
C+ Popeye 4.61
Very nice, James and Andrew (2020-09-29)
A.Buchanan: Thanks Henrik - Belen precondition of bKc1 was satisfied 1.0 move ago. From that position there is a sound #5 but position is clunky and not Meredith.
You didn’t fall into the trap of thinking Black has no last move: there is a dualized solution with BTM waiting for you if you did. (2020-09-30)
James Malcom: Haha, yeah. I fell for Andrew's trap, hook, line, and sinker! :-) (2020-09-30)
comment
Keywords: Rex solus, Belen Theme (Normal & Anti-), Cant Castler
Genre: n#, Retro
FEN: 8/8/8/8/8/BPPP4/PPk2P2/R2NK3
Input: A.Buchanan, 2020-09-29
Last update: A.Buchanan, 2021-07-17 more...
Genre: n#, Retro
FEN: 8/8/8/8/8/BPPP4/PPk2P2/R2NK3
Input: A.Buchanan, 2020-09-29
Last update: A.Buchanan, 2021-07-17 more...
1. Ka4 0-0 2. Lh1 Le1 3. g2 Tf4#
Theme: Double square vacation in a helpmate
https://www.chess.com/forum/view/general/helpmate-in-3-moves
Theme: Double square vacation in a helpmate
https://www.chess.com/forum/view/general/helpmate-in-3-moves
A.Buchanan: I really like this one :-) (2020-10-01)
A.Buchanan: If you can start the bishops on f1 & g1, then could have #h4 with the end position being double platzwechsel. Easy to get the h#3.5 - shift Lf2 to g1 & change Be3 to White. I can't help the nagging feeling that I might have seen this double swap somewhere before, but I think it was Black doing the castling (2020-10-01)
more ...
comment
A.Buchanan: If you can start the bishops on f1 & g1, then could have #h4 with the end position being double platzwechsel. Easy to get the h#3.5 - shift Lf2 to g1 & change Be3 to White. I can't help the nagging feeling that I might have seen this double swap somewhere before, but I think it was Black doing the castling (2020-10-01)
more ...
comment
1. 0-0-0xd1+! g1=D 2. Txg1+ Kxg1 3. a6 f2 4. Ld4 Lb8 5. b5
http://matplus.net/start.php?px=1601649783&app=forum&act=posts&fid=xshowe&tid=2441
http://matplus.net/start.php?px=1601649783&app=forum&act=posts&fid=xshowe&tid=2441
24 - P1380852
James Malcom
Andrew Buchanan
MatPlus.net Forum 12/10/2020
after Josef Cumpe
(1+7)
Last two moves?
(-:
James Malcom
Andrew Buchanan
MatPlus.net Forum 12/10/2020
after Josef Cumpe
(1+7)
Last two moves?
(-:
R: 1. 0-0-0+ a7-a8=sT
See P1234039 and P1375777
The joke here is that pawns may promote to enemy officers (but not to pawns or kings)
Henrik Juel: R: 1... 0-0-0+ 2.a7-a8=sT! (2020-10-12)
A.Buchanan: Maybe this is a moderate joke where we allow promotion to Bl officers, while son-of-P1375777 can be the extreme joke where promotion to any Bl unit is allowed (i.e. pawn & king too), including in the history of the game. What would Josef Cumpe think? :-) He and I are both dressed as clerics in out chesscomposers' blogspot pics: http://chesscomposers.blogspot.com/2012/08/august-16th.html. Perhaps he was a real one though? (2020-10-13)
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The joke here is that pawns may promote to enemy officers (but not to pawns or kings)
Henrik Juel: R: 1... 0-0-0+ 2.a7-a8=sT! (2020-10-12)
A.Buchanan: Maybe this is a moderate joke where we allow promotion to Bl officers, while son-of-P1375777 can be the extreme joke where promotion to any Bl unit is allowed (i.e. pawn & king too), including in the history of the game. What would Josef Cumpe think? :-) He and I are both dressed as clerics in out chesscomposers' blogspot pics: http://chesscomposers.blogspot.com/2012/08/august-16th.html. Perhaps he was a real one though? (2020-10-13)
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1. g3 d6 2. Lg2 Dd7 3. Ld5 Dh3 4. Le6 fxe6 5. a4 Kf7 6. a5 Kg6 7. a6 Kh5 8. axb7 g6 9. bxa8=L Lg7 10. Lg2 Lxb2 11. Sf3 Lg7 12. Lb2 Lb7
James Malcom: The theme is that 5 bishops are fianchettoed-one more than normally allowed! (2020-10-13)
Rainer Staudte: Rules allow a 20-bishops-fianchetto. (2020-10-13)
Henrik Juel: Very nice, James
For this short PG any tester will suffice, but if you push this idea further, Natch is much faster than Jacobi (2020-10-13)
A.Buchanan: Can’t a fianchettoed bishop go round to the bank rank and do it again? So even 20 is not a barrier (2020-10-13)
A.Buchanan: Dates in PDB are yyyy-mm-dd or dd/mm/yyyy. Hence I will change publication date from Dec to Oct (2020-10-13)
James Malcom: Right-the date slipped me again!
Andrew, while a bishop can easily be fianchettoed twice+, about the number of bishops doing it, not how many times it is done. I'm sure that an expert could do 6 fianchettoing bishops. (2020-10-13)
A.Buchanan: I am joking James: this is cool already (2020-10-13)
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Rainer Staudte: Rules allow a 20-bishops-fianchetto. (2020-10-13)
Henrik Juel: Very nice, James
For this short PG any tester will suffice, but if you push this idea further, Natch is much faster than Jacobi (2020-10-13)
A.Buchanan: Can’t a fianchettoed bishop go round to the bank rank and do it again? So even 20 is not a barrier (2020-10-13)
A.Buchanan: Dates in PDB are yyyy-mm-dd or dd/mm/yyyy. Hence I will change publication date from Dec to Oct (2020-10-13)
James Malcom: Right-the date slipped me again!
Andrew, while a bishop can easily be fianchettoed twice+, about the number of bishops doing it, not how many times it is done. I'm sure that an expert could do 6 fianchettoing bishops. (2020-10-13)
A.Buchanan: I am joking James: this is cool already (2020-10-13)
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Keywords: Promotion (L), Phoenix, Impostor (L), Unique Proof Game
Genre: Retro
Computer test: Jacobi v0.7.5
FEN: 1n4nr/pbp1p1bp/3pp1p1/7k/8/5NPq/1BPPPPBP/RN1QK2R
Input: James Malcom, 2020-10-13
Last update: A.Buchanan, 2021-04-06 more...
Genre: Retro
Computer test: Jacobi v0.7.5
FEN: 1n4nr/pbp1p1bp/3pp1p1/7k/8/5NPq/1BPPPPBP/RN1QK2R
Input: James Malcom, 2020-10-13
Last update: A.Buchanan, 2021-04-06 more...
26 - P1380882
James Malcom
Andrew Buchanan
PDB Website 14/10/2020
after Josef Cumpe
(2+7)
Last two moves?
(-:
James Malcom
Andrew Buchanan
PDB Website 14/10/2020
after Josef Cumpe
(2+7)
Last two moves?
(-:
R: 1. ... 0-0-0+ 2. a7-a8=sT
See P1234039, P1375777 and P1380852.
The joke here is that pawns may promote to *any* unit (friend or enemy; officer, king or pawns).
Henrik Juel: R: 1... 0-0-0+ 2.a7-a8=sT
not 2.e7-e8=sK, because then sTa8 would have moved, and castling not allowed (2020-10-14)
A.Buchanan: Exactly, Henrik. Also: sB on 7th rank could retract to 8th rank, so we need sT instead (2020-10-14)
more ...
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The joke here is that pawns may promote to *any* unit (friend or enemy; officer, king or pawns).
Henrik Juel: R: 1... 0-0-0+ 2.a7-a8=sT
not 2.e7-e8=sK, because then sTa8 would have moved, and castling not allowed (2020-10-14)
A.Buchanan: Exactly, Henrik. Also: sB on 7th rank could retract to 8th rank, so we need sT instead (2020-10-14)
more ...
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Keywords: Last Moves? (2), Type C, Castling in the retro play, Non-standard material (tt), Joke, Joke promotion (t), Promotion in the retro play (t), Minimal, Castling (sg)
Genre: Retro
FEN: 2kr3K/1r1r1qrR/7p/8/8/8/8/8
Input: A.Buchanan, 2020-10-14
Last update: A.Buchanan, 2023-08-15 more...
Genre: Retro
FEN: 2kr3K/1r1r1qrR/7p/8/8/8/8/8
Input: A.Buchanan, 2020-10-14
Last update: A.Buchanan, 2023-08-15 more...
1. a2-a4! Ke8-d8 2. a4-a5 Kd8-e8 3. a5-a6 Ke8-d8 4. a6-a7 Kd8-e8 5. a7-a8=L Ke8-d8 6. La8-d5 Kd8-e8 7. Ld5xb3 Ke8-d8 8. Lb3-d5 Kd8-e8 9. b2-b4 Ke8-d8 10. b4-b5 Kd8-e8 11. b5-b6 Ke8-d8 12. b6-b7 Kd8-e8 13. b7-b8=L Ke8-d8 14. Lb8-c7+ Kd8-e8 15. Th8-h7 Lf8xe7#
Cook: Dual (Zugumstellung)
14. Th7 Ke8 15. Lc7 Lxe7#
Cook: Dual (Zugumstellung)
14. Th7 Ke8 15. Lc7 Lxe7#
Genre: s#
FEN: 4kb1R/3pN1p1/3K2P1/4P2P/8/1p6/PP6/8
Input: Marcin Banaszek, 2020-10-17
Last update: James Malcom, 2020-12-05 more...
1. Kg4 Lf1 2. Kf3 Ke1 3. g4 Sg1#
http://superproblem.ru/archive/probl/H3/Malcom-h3-2020.gif
http://superproblem.ru/archive/probl/H3/Malcom-h3-2020.gif
Genre: h#
Computer test: Popeye 4.61
FEN: 8/8/8/6pk/4pb2/4p1pN/6B1/3K4
Input: James Malcom, 2020-10-17
Last update: Alfred Pfeiffer, 2020-10-19 more...
1. Ta1+! Kg2 2. Tb2+ Kf3 3. Ta3+ Ke4 4. Tb4+ Kd5 5. Ta5+ Kc6 6. Tc4+ Kb7 7. Tc7+ Kxa8 8. Ke7+ Dxf8#
7 square route of the Black king
http://superproblem.ru/archive/probl/Sn/Malcom-s8-2020.gif
7 square route of the Black king
http://superproblem.ru/archive/probl/Sn/Malcom-s8-2020.gif
Olaf Jenkner: wBg3, +wPh2 you get a model mate (2020-10-18)
A.Buchanan: Can one begin with wTa3b3 so there is a genuine try 1. Tb1? (2020-10-19)
James Malcom: It turns out that this record was actually done, doubled, by P1371538. So a 14 square route of the Black king appears to be the record, for now anyway. (2021-01-01)
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A.Buchanan: Can one begin with wTa3b3 so there is a genuine try 1. Tb1? (2020-10-19)
James Malcom: It turns out that this record was actually done, doubled, by P1371538. So a 14 square route of the Black king appears to be the record, for now anyway. (2021-01-01)
more ...
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Keywords: corner to corner, Checking key, Superseded by (P1371538)
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: N3KQqr/P2P4/3BP3/5P2/6p1/1R5p/R7/7k
Input: James Malcom, 2020-10-17
Last update: James Malcom, 2021-01-01 more...
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: N3KQqr/P2P4/3BP3/5P2/6p1/1R5p/R7/7k
Input: James Malcom, 2020-10-17
Last update: James Malcom, 2021-01-01 more...
1. Kc1! d6 2. h8=S! gxh6 3. Sg6 h5 4. Sf4 h4 5. Sxd3 h3 6. Se1 h2 7. Sc2#
https://www.matplus.net/start.php?px=1603494562&app=forum&act=posts&fid=xshown&tid=2346
https://www.matplus.net/start.php?px=1603494562&app=forum&act=posts&fid=xshown&tid=2346
James Malcom: This composition is one of my personal favorites amongst mine. It was inspired be Krabbe's Journal #89, which touches on the so called theme of "remote knight promotion." The point of this is to show the aximum diaganol distance with kings and pawns only.
A Meredith rendering is still pending for any geniuses out there. (2020-10-24)
more ...
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A Meredith rendering is still pending for any geniuses out there. (2020-10-24)
more ...
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Keywords: Stalemate avoidance, Kindergarten Problem, under-promotion (S)
Genre: n#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/3p2pP/7P/p2P4/p7/P2p4/p2P4/k2K4
Input: James Malcom, 2020-10-24
Last update: Alfred Pfeiffer, 2020-10-26 more...
Genre: n#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/3p2pP/7P/p2P4/p7/P2p4/p2P4/k2K4
Input: James Malcom, 2020-10-24
Last update: Alfred Pfeiffer, 2020-10-26 more...
1. a8=sS! Sb6 2. cxb6 cxb6 3. c7 b5 4. c8=S b4 5. Sd6 exd6 6. e7 d5 7. e8=S d4 8. Sf6 gxf6 9. g7 f5 10. g8=S f4 11. Sh6 Sg5 12. Sg4#
Keywords: Joke, Joke promotion (s), konsekutive Umwandlungen 4 (sSSS), under-promotion key (s)
Genre: n#
FEN: 7R/P1p1p1p1/2P1P1P1/2P5/8/1B1P1ppn/4prqk/4Kbnr
Input: James Malcom, 2020-10-24
Last update: Alfred Pfeiffer, 2020-10-24 more...
Genre: n#
FEN: 7R/P1p1p1p1/2P1P1P1/2P5/8/1B1P1ppn/4prqk/4Kbnr
Input: James Malcom, 2020-10-24
Last update: Alfred Pfeiffer, 2020-10-24 more...
1. b4+! e5 2. dxe6ep Kg6 3. c4+ f5 4. Lxf5+ Kh6 5. d4+ g5 6. Lxg5#
3 pairs of pawn double-steps by White and Black
http://superproblem.ru/archive/probl/N/Malcom-6x-2020.gif
3 pairs of pawn double-steps by White and Black
http://superproblem.ru/archive/probl/N/Malcom-6x-2020.gif
Henrik Juel: Slightly damaged by late duals after 2... Dd4 (2020-10-24)
James Malcom: But those are irrelevant, Henrik. (2020-10-24)
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James Malcom: But those are irrelevant, Henrik. (2020-10-24)
comment
Keywords: En passant, Checking key
Genre: n#
FEN: 4nK2/q1N1pppr/b4k2/3P4/r5P1/p6N/1PPP4/QBB5
Input: James Malcom, 2020-10-24
Last update: Alfred Pfeiffer, 2020-10-24 more...
Genre: n#
FEN: 4nK2/q1N1pppr/b4k2/3P4/r5P1/p6N/1PPP4/QBB5
Input: James Malcom, 2020-10-24
Last update: Alfred Pfeiffer, 2020-10-24 more...
1. Tf5+! Sxf5+ 2. Se4+! Sxe4 3. De6#
James Malcom: I've added in the solution now. (2020-11-02)
Henrik Juel: Thanks, James
I cannot test the problem, but it seems OK (2020-11-02)
A.Buchanan: Thanks Henrik: it's C+ according to WinChloe (2020-11-03)
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Henrik Juel: Thanks, James
I cannot test the problem, but it seems OK (2020-11-02)
A.Buchanan: Thanks Henrik: it's C+ according to WinChloe (2020-11-03)
comment
Keywords: Aristocrat, Bosma
Genre: 3#, Fairies
Computer test: C+ WinChloe v3.51
FEN: 3r2R1/3Q4/3K1k2/2n1R3/1b6/6n1/3N3q/3r4
Input: A.Buchanan, 2020-10-25
Last update: A.Buchanan, 2020-11-03 more...
Genre: 3#, Fairies
Computer test: C+ WinChloe v3.51
FEN: 3r2R1/3Q4/3K1k2/2n1R3/1b6/6n1/3N3q/3r4
Input: A.Buchanan, 2020-10-25
Last update: A.Buchanan, 2020-11-03 more...
1. ... c4 2. Se4 h4 3. g5 hxg5 4. f5 d4#
Record of 3+2 pawn double-steps by White and Black
http://superproblem.ru/archive/probl/Hn/Malkom-h35-2020.gif
Record of 3+2 pawn double-steps by White and Black
http://superproblem.ru/archive/probl/Hn/Malkom-h35-2020.gif
Keywords: Construction task, Construction record
Genre: h#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/5pp1/3pb3/4k1n1/8/4P3/K1PP3P/8
Input: James Malcom, 2020-10-25
Last update: Alfred Pfeiffer, 2020-10-26 more...
Genre: h#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/5pp1/3pb3/4k1n1/8/4P3/K1PP3P/8
Input: James Malcom, 2020-10-25
Last update: Alfred Pfeiffer, 2020-10-26 more...
1. Ta5+! b5 2. Txb5+ c5 3. Txc5+ d5 4. Txd5+ e5 5. Txe5 f5 6. Txf5+ g5 7. Tgxg5+ hxg5 8. g4+ Dxg4#
Record of 1+6 pawn double-steps by White and Black
http://superproblem.ru/archive/probl/Sn/Malcom-s8-2020-1.gif
Record of 1+6 pawn double-steps by White and Black
http://superproblem.ru/archive/probl/Sn/Malcom-s8-2020-1.gif
Keywords: Construction task, Construction record, Checking key
Genre: s#
Computer test: SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-10-25)
FEN: 4n1NN/1pppppp1/R6p/7k/6R1/7K/5pPP/6q1
Input: James Malcom, 2020-10-25
Last update: Alfred Pfeiffer, 2020-10-26 more...
Genre: s#
Computer test: SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-10-25)
FEN: 4n1NN/1pppppp1/R6p/7k/6R1/7K/5pPP/6q1
Input: James Malcom, 2020-10-25
Last update: Alfred Pfeiffer, 2020-10-26 more...
1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 hxg2 5. exf8=B gxh1=T 6. Lg2 Ke7 7. Lxb7 Ke6 8. Lxa8 Se7 9. Lb7 Txf8 10. Lxc8
http://matplus.net/start.php?px=1603899391&app=forum&act=posts&tid=2475&fid=gen&page=1
http://matplus.net/start.php?px=1603899391&app=forum&act=posts&tid=2475&fid=gen&page=1
James Malcom: The point of this PG was to make a true Belfort, after the lone bishop in P1379376 was pointed out to not be a true Belfort. (2020-10-28)
A.Buchanan: Belfort is not in the Encyclopedia! (2020-10-30)
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A.Buchanan: Belfort is not in the Encyclopedia! (2020-10-30)
more ...
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Keywords: Schnoebelen Theme (B), Dummy Pawn, Golden Age (Dummy Pawn), Belfort (Lt), Prenix (t), Prentos Theme (B), Ceriani-Frolkin Theme (B), Unique Proof Game
Genre: Retro
Computer test: Jacobi v.0.7.5
FEN: 1nBq1r2/p1ppnpp1/4k3/8/8/8/PPPPP2P/RNBQK1Nr
Input: James Malcom, 2020-10-28
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro
Computer test: Jacobi v.0.7.5
FEN: 1nBq1r2/p1ppnpp1/4k3/8/8/8/PPPPP2P/RNBQK1Nr
Input: James Malcom, 2020-10-28
Last update: A.Buchanan, 2023-08-04 more...
1. 0-0#!
https://chess.stackexchange.com/a/29992/15543
https://chess.stackexchange.com/a/29992/15543
A.Buchanan: Hi James, couple of nits about old Bosma:
(1) From the 1985 Laws: "Article 5. THE MOVES OF THE PIECES The King (a) Except when cast[l]ing, the king moves to any adjoining square that is not attacked by an opponent's piece." This is separate from Article 9. CHECK 9.1 "The king is In check when the square it occupies is attacked by one or two of the opponent's pieces; in this case the latter is or are said to be "checking the king.' 9.2 Check must be parried by the [move] immediately following." This point may have been an assumption in earlier compositions, as e.g. it prevents kings from being adjacent.
(2) And again from Article 5. "(f) Castling is prevented for the time being - (i) if the king's original square or the square which the king must cross over or that which it is to occupy is attacked by an opponent's piece," Does this prevent your 1.0-0?
What do you think? (2020-11-08)
James Malcom: Ah, why did I but never bother to look at the castling rules!
Well I see nothing against adjacent kings, and seeing about how the "loophole" was about was not explicitly stated couldn't be done, I see it as allowed, and thus what to watch out for in cooks.
The rule on castling says "piece," not pieces. So, quite simply, castling in, out (P1381498), and through (P1381499) check is allowed in my view. (2020-11-09)
James Malcom: Furthermore, if a king is "attacked," they are in check, plain and simple. So, since a triple check/ attack is not defined as a danger to the king, the king may go to any such square, including the acts of catling and adjacent kings.
Also, going by the law itself, and not the Bosma conditions, the king may be captured, but it does nothing and that side can never be checkmated, while Bosma Chess itself allows no king capture. But since the effect is the same, allowing for my jokes to be C+ by Winchloe if the program agrees. Maybe try out my castlings in it? (2020-11-09)
James Malcom: And indeed Andrew has tested my castling problems now-all are C+? (2020-11-14)
James Malcom: Typo-!, not ?. (2020-11-14)
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(1) From the 1985 Laws: "Article 5. THE MOVES OF THE PIECES The King (a) Except when cast[l]ing, the king moves to any adjoining square that is not attacked by an opponent's piece." This is separate from Article 9. CHECK 9.1 "The king is In check when the square it occupies is attacked by one or two of the opponent's pieces; in this case the latter is or are said to be "checking the king.' 9.2 Check must be parried by the [move] immediately following." This point may have been an assumption in earlier compositions, as e.g. it prevents kings from being adjacent.
(2) And again from Article 5. "(f) Castling is prevented for the time being - (i) if the king's original square or the square which the king must cross over or that which it is to occupy is attacked by an opponent's piece," Does this prevent your 1.0-0?
What do you think? (2020-11-08)
James Malcom: Ah, why did I but never bother to look at the castling rules!
Well I see nothing against adjacent kings, and seeing about how the "loophole" was about was not explicitly stated couldn't be done, I see it as allowed, and thus what to watch out for in cooks.
The rule on castling says "piece," not pieces. So, quite simply, castling in, out (P1381498), and through (P1381499) check is allowed in my view. (2020-11-09)
James Malcom: Furthermore, if a king is "attacked," they are in check, plain and simple. So, since a triple check/ attack is not defined as a danger to the king, the king may go to any such square, including the acts of catling and adjacent kings.
Also, going by the law itself, and not the Bosma conditions, the king may be captured, but it does nothing and that side can never be checkmated, while Bosma Chess itself allows no king capture. But since the effect is the same, allowing for my jokes to be C+ by Winchloe if the program agrees. Maybe try out my castlings in it? (2020-11-09)
James Malcom: And indeed Andrew has tested my castling problems now-all are C+? (2020-11-14)
James Malcom: Typo-!, not ?. (2020-11-14)
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1. 0-0+!
1. ... Shxf1 2. Dg4#
1. ... Sgxf1 2. Df2#
1. ... Lxf1 2. Tf2#
https://chess.stackexchange.com/a/29992/15543
1. ... Shxf1 2. Dg4#
1. ... Sgxf1 2. Df2#
1. ... Lxf1 2. Tf2#
https://chess.stackexchange.com/a/29992/15543
A.Buchanan: Nice way to combine an orthodox theme with Bosma castling (2020-11-13)
James Malcom: Thanks, Andrew. Castling with check is the easiest way to achieve it of course, not to mention the flight taking. I'll try out a version without check, here soon. (2020-11-13)
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James Malcom: Thanks, Andrew. Castling with check is the easiest way to achieve it of course, not to mention the flight taking. I'll try out a version without check, here soon. (2020-11-13)
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Keywords: Joke, Bosma, Castling key, Checking key, x pieces capture on one square, Flight taking
Genre: 2#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 8/8/8/5B2/5p1Q/5kn1/2NRb2n/4K2R
Input: James Malcom, 2020-11-03
Last update: A.Buchanan, 2024-02-01 more...
Genre: 2#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 8/8/8/5B2/5p1Q/5kn1/2NRb2n/4K2R
Input: James Malcom, 2020-11-03
Last update: A.Buchanan, 2024-02-01 more...
1. Kc2#!
https://www.ecforum.org.uk/viewtopic.php?p=246809#p246809
Reprint: https://chess.stackexchange.com/a/29992/15543
https://www.ecforum.org.uk/viewtopic.php?p=246809#p246809
Reprint: https://chess.stackexchange.com/a/29992/15543
1. Se5#!
A.Buchanan: Trivial verification, perhaps, but at least it confirms that WinChloe's understanding of the condition resembles James'. (2020-11-13)
comment
comment
1. 0-0! droht 2. Tf8#
1. ... 0-0-0 2. Txb6+ Kc7 3. Tb7+ Kc8 4. Txb5+ Kc7 5. Tb7+ Kc8 6. Txb4+ Kc7 7. Tb7+ Kc8 8. Txb3+ Kc7 9. Tb7+ Kc8 10. Txb2+ Kc7 11. Tb7+ Kc8 12. Txb1+ Kc7 13. Tb7+ Kc8 14. Txd1 Tg8+ 15. Sg5 Kd8 16. Tdb1 Ta1 17. Txa1 exd5 18. Tb8+ Kc7 19. Txg8 dxe4 20. Tb1 d5 21. Tc8+ Kd6 22. Tb6#
The longest problem with both sides castling
http://superproblem.ru/archive/probl/N/Malcom-22x-2020.gif
1. ... 0-0-0 2. Txb6+ Kc7 3. Tb7+ Kc8 4. Txb5+ Kc7 5. Tb7+ Kc8 6. Txb4+ Kc7 7. Tb7+ Kc8 8. Txb3+ Kc7 9. Tb7+ Kc8 10. Txb2+ Kc7 11. Tb7+ Kc8 12. Txb1+ Kc7 13. Tb7+ Kc8 14. Txd1 Tg8+ 15. Sg5 Kd8 16. Tdb1 Ta1 17. Txa1 exd5 18. Tb8+ Kc7 19. Txg8 dxe4 20. Tb1 d5 21. Tc8+ Kd6 22. Tb6#
The longest problem with both sides castling
http://superproblem.ru/archive/probl/N/Malcom-22x-2020.gif
Keywords: Zwickmühle, Move Length Record, Superseded by (P1396373), Castling
Genre: n#
FEN: r3k3/1R1pp2N/Bq1pp3/1n1P4/Pp1PP2P/rp2P3/1b6/1b1nK2R
Input: James Malcom, 2020-11-04
Last update: James Malcom, 2021-11-28 more...
Genre: n#
FEN: r3k3/1R1pp2N/Bq1pp3/1n1P4/Pp1PP2P/rp2P3/1b6/1b1nK2R
Input: James Malcom, 2020-11-04
Last update: James Malcom, 2021-11-28 more...
1. g8=D! droht 2. Df7#
1. ... Tf5 2. Dd8#
1. ... Le8 2. Dxe8#
1. ... Sh8 2. Df8#
1. ... Tf5 2. Dd8#
1. ... Le8 2. Dxe8#
1. ... Sh8 2. Df8#
Keywords: Promotion key (D), Flight taking
Genre: 2#
Computer test: Popeye 4.61
FEN: 1rR5/2P1k1PP/2b1P1nR/3r2P1/2B1N3/3pK3/8/8
Input: James Malcom, 2020-11-12
Last update: James Malcom, 2020-11-13 more...
Genre: 2#
Computer test: Popeye 4.61
FEN: 1rR5/2P1k1PP/2b1P1nR/3r2P1/2B1N3/3pK3/8/8
Input: James Malcom, 2020-11-12
Last update: James Malcom, 2020-11-13 more...
1. h8=D+! e5 2. dxe6ep+ Kxd3 3. 0-0-0#
2. ... Kxb4 3. Db2#
2. ... Kxb4 3. Db2#
Keywords: Valladao Task, Promotion key (D), En passant, Castling as mating move, Checking key, Flight-giving key
Genre: 3#
Computer test: popeye 4.85
FEN: 8/4p2P/3p4/2pP4/1R6/2kBp3/8/R3K1N1
Input: James Malcom, 2020-11-12
Last update: Alfred Pfeiffer, 2020-11-13 more...
Genre: 3#
Computer test: popeye 4.85
FEN: 8/4p2P/3p4/2pP4/1R6/2kBp3/8/R3K1N1
Input: James Malcom, 2020-11-12
Last update: Alfred Pfeiffer, 2020-11-13 more...
44 - P1381791
James Malcom
Facebook 26/09/2020
(16+15) C+
BP in 6.5
Where did the Black queen disapear?
James Malcom
Facebook 26/09/2020
(16+15) C+
BP in 6.5
Where did the Black queen disapear?
1. g3 b6 2. Lh3 La6 3. Lg4 Dc8 4. Sh3 Db7 5. 0-0 Dh1+ 6. Kxh1 Lc8 7. Te1
Keywords: Unique Proof Game, Castling, Switchback (l)
Genre: Retro
Computer test: C+ Natch 3.1
FEN: rnb1kbnr/p1pppppp/1p6/8/6B1/6PN/PPPPPP1P/RNBQR2K
Input: James Malcom, 2020-11-12
Last update: James Malcom, 2021-02-14 more...
Genre: Retro
Computer test: C+ Natch 3.1
FEN: rnb1kbnr/p1pppppp/1p6/8/6B1/6PN/PPPPPP1P/RNBQR2K
Input: James Malcom, 2020-11-12
Last update: James Malcom, 2021-02-14 more...
1. h8=T+! Sh6 2. exd8=K! b3 3. a8=sS! b2 4. b8=sL! La7 5. e4 Lb8 6. e5 La7 7. e6 Lb8 8. e7 La7 9. e8=B! Lb8 10. Ta4 La7 11. Txa7 g4#
A rather... complicated "joke."
A rather... complicated "joke."
A.Buchanan: If one allows promotion to sB (and there seems no reason to disallow it since promotion to pawn, king and foreign units are allowed) then the problem is cooked. There is no universally agreed notion of how a pawn can move if it starts on the first rank. Does it get a double hop, and if so on which rank? But the problem is unsound in any case. (2022-02-10)
James Malcom: That is if, yes. But I don't think this problem ought to be left as is: a demonstration of the levels of absurdity and tomfoolery old rules used to allow. Promotion to a piece of another color and dummies were loopholes, yes, but promotion to a black pawn was never included, not even implicitly. All pawns are pieces, but not all pieces are pawns. (2022-02-10)
more ...
comment
James Malcom: That is if, yes. But I don't think this problem ought to be left as is: a demonstration of the levels of absurdity and tomfoolery old rules used to allow. Promotion to a piece of another color and dummies were loopholes, yes, but promotion to a black pawn was never included, not even implicitly. All pawns are pieces, but not all pieces are pawns. (2022-02-10)
more ...
comment
Keywords: Joke promotion (Ksl), Dummy Pawn, konsekutive Umwandlungen 5 (TKslB), under-promotion key (T), Excelsior white, Golden Age (Dummy Pawn), Illegal position (no wK), Joke
Genre: s#, Fairies
Computer test: Difficult to test at the moment because no engine allows both normal and adversarial promotion.
FEN: 2Rr2n1/PPpBP2P/1pP5/1N4pk/1p4Rb/6pP/4P1P1/1Q6
Input: James Malcom, 2020-11-14
Last update: A.Buchanan, 2023-12-11 more...
Genre: s#, Fairies
Computer test: Difficult to test at the moment because no engine allows both normal and adversarial promotion.
FEN: 2Rr2n1/PPpBP2P/1pP5/1N4pk/1p4Rb/6pP/4P1P1/1Q6
Input: James Malcom, 2020-11-14
Last update: A.Buchanan, 2023-12-11 more...
1. Dxc4!
1. ... Kxe5 2. Dxd5#
1. ... Tdxe5 2. Sxd6#
1. ... Texe5 2. Txf4#
1. ... Lxe5 2. Dxe4#
1. ... dxe5 2. Txf6#
1. ... fxe5 2. Tg5#
https://www.chess.com/forum/view/more-puzzles/x-marks-the-spot-mate-in-2?page=1
1. ... Kxe5 2. Dxd5#
1. ... Tdxe5 2. Sxd6#
1. ... Texe5 2. Txf4#
1. ... Lxe5 2. Dxe4#
1. ... dxe5 2. Txf6#
1. ... fxe5 2. Tg5#
https://www.chess.com/forum/view/more-puzzles/x-marks-the-spot-mate-in-2?page=1
Keywords: x pieces capture on one square (6), x pieces move to one square (6), x pieces defend on one square (6), Capture key
Genre: 2#
Computer test: popeye 4.85
FEN: B7/5K2/R2p1p2/1NprPk2/Q1pbrpR1/2p1pP1N/2P1P3/8
Input: James Malcom, 2020-11-16
Last update: Alfred Pfeiffer, 2020-11-17 more...
Genre: 2#
Computer test: popeye 4.85
FEN: B7/5K2/R2p1p2/1NprPk2/Q1pbrpR1/2p1pP1N/2P1P3/8
Input: James Malcom, 2020-11-16
Last update: Alfred Pfeiffer, 2020-11-17 more...
1. Tb2+? Ka3!
1. Lf3! ... 2. Ld1#
Inspired by P1182074
White releases stalemate as a #2, giving Black 20(!) moves. First record in a new task. See:
http://matplus.net/start.php?px=1606065655&app=forum&act=posts&fid=gen&tid=2586&pid=20040#n20040
1. Lf3! ... 2. Ld1#
Inspired by P1182074
White releases stalemate as a #2, giving Black 20(!) moves. First record in a new task. See:
http://matplus.net/start.php?px=1606065655&app=forum&act=posts&fid=gen&tid=2586&pid=20040#n20040
Henrik Juel: No record, P1182074 is far better in terms of giving Black moves, 32
But this problem also a #2 (2020-11-22)
A.Buchanan: First record in a new task (2020-11-22)
James Malcom: Henrik, you misunderstood! The task is different from the 32! This is about Black release in the #2 form, not releae in the fairy form. (2020-11-22)
comment
But this problem also a #2 (2020-11-22)
A.Buchanan: First record in a new task (2020-11-22)
James Malcom: Henrik, you misunderstood! The task is different from the 32! This is about Black release in the #2 form, not releae in the fairy form. (2020-11-22)
comment
Keywords: Stalemate dissolution
Genre: 2#
Computer test: Popeye 4.85
FEN: 8/8/NN1p4/1p1B4/1Pr5/1kb4R/3R4/1KB5
Input: James Malcom, 2020-11-22
Last update: James Malcom, 2021-06-22 more...
Genre: 2#
Computer test: Popeye 4.85
FEN: 8/8/NN1p4/1p1B4/1Pr5/1kb4R/3R4/1KB5
Input: James Malcom, 2020-11-22
Last update: James Malcom, 2021-06-22 more...
1. a4+! Kc5 2. b4+ Kd5 3. c4+ Ke5 4. d4+ Kf5 5. e4+ Kg5 6. f4+ Kh6 7. g4 Txa6 8. g5#
7. ... Lg8 8. Txh5#
7 pawn double-steps by White
http://superproblem.ru/archive/probl/N/Malcom-8x-2020.gif
7. ... Lg8 8. Txh5#
7 pawn double-steps by White
http://superproblem.ru/archive/probl/N/Malcom-8x-2020.gif
SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-11-25)
James Malcom: Houston, we have a problem: I merely marked this as C+, and the entire position just disappeared?! (2020-12-30)
Gerd Wilts: Hi James, this was unfortunately a new bug introduced yesterday evening with a PDB update. It is now fixed. (2020-12-31)
comment
James Malcom: Houston, we have a problem: I merely marked this as C+, and the entire position just disappeared?! (2020-12-30)
Gerd Wilts: Hi James, this was unfortunately a new bug introduced yesterday evening with a PDB update. It is now fixed. (2020-12-31)
comment
Keywords: Construction record
Genre: n#
FEN: 1N6/r2p2pb/R5p1/1k5p/7R/7K/PPPPPPP1/8
Input: James Malcom, 2020-11-25
Last update: Gerd Wilts, 2020-12-31 more...
Genre: n#
FEN: 1N6/r2p2pb/R5p1/1k5p/7R/7K/PPPPPPP1/8
Input: James Malcom, 2020-11-25
Last update: Gerd Wilts, 2020-12-31 more...
1. g4! Ka2 2. g5 Ka1 3. g6 Ka2 4. g7 Ka1 5. g8=L, Se2#,Sf3#,Sh3#
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
1. a4! Ka1 2. a5 Kb1 3. a6 Ka1 4. a7 Kb1 5. a8=T Se2#,Sf3#,Sh3#
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
1. g4! Kc2 2. g5 Kc1 3. g6 Kc2 4. g7 Kc1 5. g8=D Kc2 6. Dg5 axb2#
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
1. a4! Kh1 2. a5 Kh2 3. a6 Kh1 4. a7 h2 5. a8=S Se8#,Sh5#
4. ... Kh2 5. a8=L Se8#,Sh5#
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
4. ... Kh2 5. a8=L Se8#,Sh5#
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
14 double check mates
http://matplus.net/start.php?px=1607750786&app=forum&act=posts&fid=gen&tid=2281
Genre: Mathematics
FEN: 4Q3/2B1N1B1/3R1R2/1QN1k1NQ/5R2/2K1N1B1/4Q3/4n3
Input: James Malcom, 2020-12-13
Last update: James Malcom, 2021-04-19 more...
1. 0-0-0+! Sf1 2. Txf1#
http://matplus.net/start.php?px=1608213940&app=forum&act=posts&fid=xshow2&tid=2297
Both rook squares are maximally attacked
http://matplus.net/start.php?px=1608213940&app=forum&act=posts&fid=xshow2&tid=2297
Both rook squares are maximally attacked
Keywords: Castling key
Genre: 2#
Computer test: Popeye 4.61
FEN: 8/8/8/8/pppbbp1r/nr2pppB/q2n2Pp/R3K2k
Input: James Malcom, 2020-12-17
Last update: Alfred Pfeiffer, 2020-12-17 more...
Genre: 2#
Computer test: Popeye 4.61
FEN: 8/8/8/8/pppbbp1r/nr2pppB/q2n2Pp/R3K2k
Input: James Malcom, 2020-12-17
Last update: Alfred Pfeiffer, 2020-12-17 more...
1. hxg8=D! droht 2. Da8#
1. ... e5+ 2. fxe6ep#
1. ... g5 2. fxg6ep#
http://matplus.net/start.php?px=1608305486&app=forum&act=posts&fid=xshow3&tid=2525
1. ... e5+ 2. fxe6ep#
1. ... g5 2. fxg6ep#
http://matplus.net/start.php?px=1608305486&app=forum&act=posts&fid=xshow3&tid=2525
Keywords: Promotion key (D), En passant as mating move
Genre: 2#
Computer test: Popeye 4.61
FEN: 6n1/4pRpP/7B/5P1p/3K4/5k2/6R1/7B
Input: James Malcom, 2020-12-18
Last update: James Malcom, 2021-06-22 more...
Genre: 2#
Computer test: Popeye 4.61
FEN: 6n1/4pRpP/7B/5P1p/3K4/5k2/6R1/7B
Input: James Malcom, 2020-12-18
Last update: James Malcom, 2021-06-22 more...
1. ... c4! (Kb3?) 2. Th4 g4 3. Th7 h4 4. Dh6 f4 5. Lf7 f5#
4 pawn double steps by White
http://superproblem.ru/archive/probl/Hn/Malkom-h45-2020.gif
4 pawn double steps by White
http://superproblem.ru/archive/probl/Hn/Malkom-h45-2020.gif
SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-12-25)
Ladislav Packa: Construction can be more economical, the solution is the same:
Ka2, Pc2, f2, g2, h2 (5) - Kg6, Qc1, Rf4, Be8, Bg7, Pf6 (6)
C+ by Popeye v4.77 (2020-12-25)
James Malcom: Very beautiful economization Ladislav! (2020-12-26)
Olaf Jenkner: siehe auch die kürzere Fassung P1384242 (2020-12-26)
comment
Ladislav Packa: Construction can be more economical, the solution is the same:
Ka2, Pc2, f2, g2, h2 (5) - Kg6, Qc1, Rf4, Be8, Bg7, Pf6 (6)
C+ by Popeye v4.77 (2020-12-25)
James Malcom: Very beautiful economization Ladislav! (2020-12-26)
Olaf Jenkner: siehe auch die kürzere Fassung P1384242 (2020-12-26)
comment
Genre: h#
Computer test: Gustav 4.1d, Brute Force
FEN: 4b3/6p1/2p2pk1/8/K4r2/P7/2Pq1PPP/8
Input: James Malcom, 2020-12-25
Last update: James Malcom, 2021-06-22 more...
1. ... Td7 2. Lb1! Kd6 3. De5+ Kc6 4. De6+ Td6 5. De8+ Td7 6. Ka2 Kd6 7. De5+ Kc6 8. De6+ Td6 9. De8+ Td7 10. Ka1 Kd6 11. De5+ Kc6 12. De6+ Td6 13. De8+ Td7 14. La2 Kd6 15. De5+ Kc6 16. De6+ Td6 17. De8+ Td7 18. Kb1 Kd6 19. De5+ Kc6 20. De6+ Td6 21. De8+ Td7 22. Kc1 Kd6 23. De5+ Kc6 24. De6+ Td6 25. De8+ Td7 26. Kd1 Kd6 27. De5+ Kc6 28. De6+ Td6 29. De8+ Td7 30. Ke1 Kd6 31. De5+ Kc6 32. De6+ Td6 33. De8+ Td7 34. Kf2 Kd6 35. De5+ Kc6 36. De6+ Td6 37. De8+ Td7 38. Kg3 Kd6 39. De5+ Kc6 40. De6+ Td6 41. De8+ Td7 42. Kh4 Kd6 43. De5+ Kc6 44. De6+ Td6 45. De8+ Td7 46. Kg5 Kd6 47. De5+ Kc6 48. De6+ Td6 49. De8+ Td7 50. Kxf5! Kd6 51. De6#
50. Kf6? Kd6! Drawn by the 50 move rule!
White's pre-diagram move couldn't have been a capture, so the 50-move counter has already been set to 1. Thus, White must play 50. Kxf5 in order to reset the counter, or else Black will draw.
See P1372258
http://matplus.net/start.php?px=1609121267&app=forum&act=posts&fid=gen&tid=2590
50. Kf6? Kd6! Drawn by the 50 move rule!
White's pre-diagram move couldn't have been a capture, so the 50-move counter has already been set to 1. Thus, White must play 50. Kxf5 in order to reset the counter, or else Black will draw.
See P1372258
http://matplus.net/start.php?px=1609121267&app=forum&act=posts&fid=gen&tid=2590
Henrik Juel: 3 and 5 captures by white and black pawns are obvious, leaving [Ph2,Ph7], so the remaining white capture was hxg (with promotions on g8 and h1) or officerxPh (with promotion on h8) (2022-11-05)
comment
comment
Keywords: 50 move rule
Genre: Retro, n#
FEN: n3Q3/1pp5/brkr4/Bp1p1p2/1P1PpP2/KPp1P3/B1P1P3/8
Input: James Malcom, 2020-12-28
Last update: A.Buchanan, 2022-11-05 more...
Genre: Retro, n#
FEN: n3Q3/1pp5/brkr4/Bp1p1p2/1P1PpP2/KPp1P3/B1P1P3/8
Input: James Malcom, 2020-12-28
Last update: A.Buchanan, 2022-11-05 more...
1. a4! Lg1 2. a5 Lh2 3. a6 Lg1 4. a7 Lh2 5. a8=L Lg1 6. Le4 Lh2 7. Lxd3 Lg1 8. Le4 Lh2 9. d4 Lg1 10. d5 Lh2 11. d6 Lg1 12. d7 Lh2 13. d8=S Lg1 14. Sc6 Lh2 15. Se7 Lg1 16. Sg6+ hxg6#
Cook: An engine side solution: 1. Lf7 Lg1 2. e6 Lh2 3. e7 Lg1 4. Ld5 Lh2 5. a4 Lg1 6. a5 Lh2 7. a6 Lg1 8. a7 Lh2 9. Lc6 Lg1 10. Lxg7+ Kg8 11. a8=D+ Kf7 12. e8=T Lh2 13. Le4 Lg1 14. Le5 Lh2 15. Dc6 Lg1 16. Dg6+ hxg6#
9. ... Kg8 10. e8=T+ Kf7 11. Lxg7 Lg1 12. a8=D Lh2 13. Le4 Lg1 14. Le5 Lh2 15. Dc6 Lg1 16. Dg6+ hxg6#
Cook: An engine side solution: 1. Lf7 Lg1 2. e6 Lh2 3. e7 Lg1 4. Ld5 Lh2 5. a4 Lg1 6. a5 Lh2 7. a6 Lg1 8. a7 Lh2 9. Lc6 Lg1 10. Lxg7+ Kg8 11. a8=D+ Kf7 12. e8=T Lh2 13. Le4 Lg1 14. Le5 Lh2 15. Dc6 Lg1 16. Dg6+ hxg6#
9. ... Kg8 10. e8=T+ Kf7 11. Lxg7 Lg1 12. a8=D Lh2 13. Le4 Lg1 14. Le5 Lh2 15. Dc6 Lg1 16. Dg6+ hxg6#
SCHRECKE: Nebenlösung: 1.Lf7 ... 3.e7 4.Ld5 ... 8.a7 Lh2 9.Lc6 Lg1 10.L:g7+ Kg8 11.a8D+ Kf7 12.e8T Lh2 13.Le4 Lg1 14.Le5 Lh2 15.Dc6 Lg1 16.Dg6+ h:g6# (2021-01-01)
James Malcom: Are there any more cooks? (2021-01-02)
SCHRECKE: Diese NL hat viele Zugumstellungen, sonst fand ich nichts. (2021-01-03)
James Malcom: It's seemingly fitting that the cook produces an AUW. I presume that you used Gustav? (2021-01-03)
SCHRECKE: Yes (2021-01-03)
James Malcom: How does it fare with a white rook on h5 instead, so Bxg7+ doesn't work? (2021-01-03)
SCHRECKE: Maybe it's okay with wRh5. (2021-01-03)
comment
James Malcom: Are there any more cooks? (2021-01-02)
SCHRECKE: Diese NL hat viele Zugumstellungen, sonst fand ich nichts. (2021-01-03)
James Malcom: It's seemingly fitting that the cook produces an AUW. I presume that you used Gustav? (2021-01-03)
SCHRECKE: Yes (2021-01-03)
James Malcom: How does it fare with a white rook on h5 instead, so Bxg7+ doesn't work? (2021-01-03)
SCHRECKE: Maybe it's okay with wRh5. (2021-01-03)
comment
Genre: s#
FEN: 7k/6rp/4BB1p/4PK1N/5PP1/3p2p1/P2P1pPb/5N2
Input: A.Buchanan, 2021-01-01
Last update: Marcin Banaszek, 2021-01-07 more...
59 - P1384834
James Malcom
2 ChessBase India 25/12/2020
Dedicated to Arno Tüngler
(9+11)
White rochade in 76
James Malcom
2 ChessBase India 25/12/2020
Dedicated to Arno Tüngler
(9+11)
White rochade in 76
1. Le8! Kg8 2. Ld7 Kh8 3. Lc8 Kg8 4. La6 Kh8 5. Lb7 Kg8 6. Lc8 Kh8 7. Ld7 Kg8 8. Le8 Kh8 9. Lf7 a4 18. ... a3 27. ... a2 36. ... e4 45. ... e3 54. ... h5 63. ... h4 72. ... Sc3 73. Sxc3 e2 74. Lg8,Le8 Kxg8,Kg8 75. Sxe2 Kh8 76. 0-0-0
James Malcom: See the now longer P1385386 with 102 moves, and also P1385390, the extension to this. (2021-01-15)
A.Buchanan: I suggest you use the keywords “superseded by” and “length record” which are designed (together with “economy record”) to track evolution of challenges. A record keyword is removed when a problem is superseded. In my opinion, you were generous to have awarded S.Manikumar an “after” rather than a “version” - the interaction of the knights is the coolest part for me - did you originate that? (2021-01-16)
James Malcom: Yes, I shall do that tomorrow, along with some others.
The bishop tempo is an old an well-used mechanism, the only one I find suitable for this task. And yes, I came up with the duel of the knights. An "After" is deserved, both as gratitude and the clever dual elimination at the end, which mine detracts from. (2021-01-16)
more ...
comment
A.Buchanan: I suggest you use the keywords “superseded by” and “length record” which are designed (together with “economy record”) to track evolution of challenges. A record keyword is removed when a problem is superseded. In my opinion, you were generous to have awarded S.Manikumar an “after” rather than a “version” - the interaction of the knights is the coolest part for me - did you originate that? (2021-01-16)
James Malcom: Yes, I shall do that tomorrow, along with some others.
The bishop tempo is an old an well-used mechanism, the only one I find suitable for this task. And yes, I came up with the duel of the knights. An "After" is deserved, both as gratitude and the clever dual elimination at the end, which mine detracts from. (2021-01-16)
more ...
comment
1. b1=B! Lxa3 2. c1=B! Dxc3#
Keywords: Dummy Pawn, Golden Age (Dummy Pawn), konsekutive Umwandlungen 2 (bb)
Genre: h#
Computer test: Popeye 4.79
FEN: 8/8/8/8/p2Q4/r1pKP3/ppp1P3/k1Bb4
Input: James Malcom, 2021-01-04
Last update: A.Buchanan, 2023-08-04 more...
Genre: h#
Computer test: Popeye 4.79
FEN: 8/8/8/8/p2Q4/r1pKP3/ppp1P3/k1Bb4
Input: James Malcom, 2021-01-04
Last update: A.Buchanan, 2023-08-04 more...
61 - P1385355
James Malcom
puzzling.stackexchange.com 28/06/2019
"The Slaughterhouse"
(16+3) C+
s#16 for Black
James Malcom
puzzling.stackexchange.com 28/06/2019
"The Slaughterhouse"
(16+3) C+
s#16 for Black
1. ... Lxg3+! 2. Kg1 Lh2+ 3. Kh1 Lxf4+ 4. Kg1 Lh2+ 5. Kh1 Lxe5+ 6. Kg1 Lh2+ 7. Kh1 Lxd6+ 8. Kg1 Lh2+ 9. Kh1 Lxc7+ 10. Kg1 Lh2+ 11. Kh1 Lxb8+ 12. Kg1 Lxa7+ 13. Sc5 Lxc5+ 14. Td4 Lxd4+ 15. Le3 Lxe3+ 16. Tf2+ Lxf2+ 17. Dxf2#
https://puzzling.stackexchange.com/questions/85630/the-slaughterhouse?
http://matplus.net/start.php?px=1610634596&app=forum&act=posts&fid=xshows&tid=2311
https://puzzling.stackexchange.com/questions/85630/the-slaughterhouse?
http://matplus.net/start.php?px=1610634596&app=forum&act=posts&fid=xshows&tid=2311
Henrik Juel: The motto is very apt
Why did you not frame the problem as a standard s#16, James? (2021-01-15)
James Malcom: It's probably because it was my first great leap at a long selfmate, and I didn't quite know all the conventions just yet. A color reversal should suffice for a C+ test. (2021-01-15)
SCHRECKE: C+, Gustav 4.1d, Brute Force (color reversal + rotation by 180 degrees) (2021-01-15)
A.Buchanan: In preserving this problem for future ages, I might tend to log the flipped version, and then record that the original was BTM, but up to you... :-) (2021-01-16)
comment
Why did you not frame the problem as a standard s#16, James? (2021-01-15)
James Malcom: It's probably because it was my first great leap at a long selfmate, and I didn't quite know all the conventions just yet. A color reversal should suffice for a C+ test. (2021-01-15)
SCHRECKE: C+, Gustav 4.1d, Brute Force (color reversal + rotation by 180 degrees) (2021-01-15)
A.Buchanan: In preserving this problem for future ages, I might tend to log the flipped version, and then record that the original was BTM, but up to you... :-) (2021-01-16)
comment
Keywords: Zwickmühle
Genre: s#
Computer test: Gustav 4.1d, Brute Force (color reversal + rotation by 180 degree)
FEN: 1N3Q2/PNP1PR2/3P4/P3P3/R4P2/6Pq/2B1k2b/2B4K
Reprints: Mat Plus 29/06/29
Input: James Malcom, 2021-01-14
Last update: James Malcom, 2021-06-07 more...
Genre: s#
Computer test: Gustav 4.1d, Brute Force (color reversal + rotation by 180 degree)
FEN: 1N3Q2/PNP1PR2/3P4/P3P3/R4P2/6Pq/2B1k2b/2B4K
Reprints: Mat Plus 29/06/29
Input: James Malcom, 2021-01-14
Last update: James Malcom, 2021-06-07 more...
1. Le8! Kg8 2. Ld7 Kh8 3. Lc8 Kg8 4. La6 Kh8 5. Lb7 Kg8 6. Lc8 Kh8 7. Ld7 Kg8 8. Le8 Kh8 9. Lf7 dxe5 18. ... a4 27. ... a3 36. ... a2 45. ... e4 54. ... e3 63. ... h5 72. ... h4 81. ... Sc3 82. Sxc3 e2 83. Lg8,Le8 Kxg8,Kg8 84. Sxe2 Kh8 85. 0-0-0
https://chessbase.in/news/Solutions-to-Christmastide-Problems-top-solvers-and-more?fbclid=IwAR23oroTmkRpvTzFARLw3CG03etxtCMVvu9iGPGng4cN8vzwosGA8dsHdbs
https://chessbase.in/news/Solutions-to-Christmastide-Problems-top-solvers-and-more?fbclid=IwAR23oroTmkRpvTzFARLw3CG03etxtCMVvu9iGPGng4cN8vzwosGA8dsHdbs
63 - P1385595
Andrew Buchanan
James Malcom
Hauke Reddmann
Michel Caillaud
MatPlus.net Forum 06/01/2021
in memory of Conrad Staugaard
(14+13)
PG in 10.0
Staugaard castling
Andrew Buchanan
James Malcom
Hauke Reddmann
Michel Caillaud
MatPlus.net Forum 06/01/2021
in memory of Conrad Staugaard
(14+13)
PG in 10.0
Staugaard castling
b) 1. d4 f5 2. Kd2 f4 3. Kd3 f3 4. Ke4 fxe2 5. Kf5 e1=T 6. De2 g5 7. Dxe7+ Sxe7+ 8. Kf6 Lg7+ 9. Kxg7 Sd5 10. Kxh8 0-0-0-0-0-0#
Objective: Staugaard (Pam-Krabbé) castling as mating move.
Henrik Juel: solution
1. Bd2-d4 Bf7-f5 2. Ke1-d2 Bf5-f4 3. Kd2-d3 Bf4-f3
4. Kd3-e4 Bf3xe2 5. Ke4-f5 Be2-e1=T 6. Dd1-e2 Bg7-g5
7. De2xe7 Sg8xe7 8. Kf5-f6 Lf8-g7 9. Kf6xg7 Se7-d5
10. Kg7xh8 0-0-0-0-0-0#
First 9.5 moves are C+ Euclide 1.01
On behalf of the danish inventor of the looong castling, I thank for the dedication (2021-01-21)
James Malcom: After the 12.5 Andrew and I made, this turns out the fastest possible. 9.0 if you go non-unique. (2021-01-21)
A.Buchanan: Welcome, Henrik. Any idea what his initial "C." stands for? I couldn't find it online. (2021-01-22)
Henrik Juel: Unfortunately not, Andrew
In those days the first name was almost always abbreviated to an initial
Christian was a very common first name, but this was usually abbreviated to Chr.
So a wild guess is Carl, but it really could be anything starting with C
In a Skakbladet issue he is referred to as Direktør Staugaard, but this just means that he was in charge of a company (2021-01-22)
A.Buchanan: I have posted an English definition of the keyword. Please check if it suits. (2021-01-22)
Henrik Juel: Searching for direktør staugaard, randers (a danish city) yields
Conrad Staugaard (1852-1922)
so this is my best bet
Conrad Staugaard headed a bank in Randers, founded by him in 1891, but the CV in
http://historiskranders.dk/randers-biografier/
does not mention anything about playing chess or chess problems
Chess playing was very common in the middle class, so the biographer may not have found it worth mentioning (2021-01-22)
Henrik Juel: Your keyword definition seems fine,
except for the spelling of showcase... (2021-01-22)
A.Buchanan: Haha bingo: "Staugaard was a well-known and excellent chess-player, one of the many traits he had in common with Lewis Carroll". MMA SAM - Tidsskrift.dk. Googling for "Conrad Staugaard skak" brings up the pdf for Rama Sama. Please tell us what you make of it, Henrik :) In the mean time, I have updated the author info for him (2021-01-22)
Henrik Juel: Very good, Andrew
Ah, the joys of Google...
In the danish text there is not only your citation on chess, but also one on chess problems
There are also examples of Conrad's excentric behaviour, in line with him inventing the looong castling
That C. Staugaard might be Conrad's younger brother Carl (who surely also knew about chess) is ruled out by the fact that Carl emigrated to South America in 1901, because he experienced disappointments in his love live... (2021-01-22)
A.Buchanan: Yes it said he had lots of amazing concepts. The idea about the banner for his nursemaid to take his children for walks without getting her arms stretched is very funny. This is our man. He also seems to have been a good man, and an effective businessman. And loved enough by his friends for a 120 page book to have been commissioned in his memory. He is reminiscent of other children’s authors like Edward Lear, Dr Seuss, Heinrich Hoffmann... I’m so happy that this problem has brought him back to our awareness (2021-01-23)
comment
Henrik Juel: solution
1. Bd2-d4 Bf7-f5 2. Ke1-d2 Bf5-f4 3. Kd2-d3 Bf4-f3
4. Kd3-e4 Bf3xe2 5. Ke4-f5 Be2-e1=T 6. Dd1-e2 Bg7-g5
7. De2xe7 Sg8xe7 8. Kf5-f6 Lf8-g7 9. Kf6xg7 Se7-d5
10. Kg7xh8 0-0-0-0-0-0#
First 9.5 moves are C+ Euclide 1.01
On behalf of the danish inventor of the looong castling, I thank for the dedication (2021-01-21)
James Malcom: After the 12.5 Andrew and I made, this turns out the fastest possible. 9.0 if you go non-unique. (2021-01-21)
A.Buchanan: Welcome, Henrik. Any idea what his initial "C." stands for? I couldn't find it online. (2021-01-22)
Henrik Juel: Unfortunately not, Andrew
In those days the first name was almost always abbreviated to an initial
Christian was a very common first name, but this was usually abbreviated to Chr.
So a wild guess is Carl, but it really could be anything starting with C
In a Skakbladet issue he is referred to as Direktør Staugaard, but this just means that he was in charge of a company (2021-01-22)
A.Buchanan: I have posted an English definition of the keyword. Please check if it suits. (2021-01-22)
Henrik Juel: Searching for direktør staugaard, randers (a danish city) yields
Conrad Staugaard (1852-1922)
so this is my best bet
Conrad Staugaard headed a bank in Randers, founded by him in 1891, but the CV in
http://historiskranders.dk/randers-biografier/
does not mention anything about playing chess or chess problems
Chess playing was very common in the middle class, so the biographer may not have found it worth mentioning (2021-01-22)
Henrik Juel: Your keyword definition seems fine,
except for the spelling of showcase... (2021-01-22)
A.Buchanan: Haha bingo: "Staugaard was a well-known and excellent chess-player, one of the many traits he had in common with Lewis Carroll". MMA SAM - Tidsskrift.dk. Googling for "Conrad Staugaard skak" brings up the pdf for Rama Sama. Please tell us what you make of it, Henrik :) In the mean time, I have updated the author info for him (2021-01-22)
Henrik Juel: Very good, Andrew
Ah, the joys of Google...
In the danish text there is not only your citation on chess, but also one on chess problems
There are also examples of Conrad's excentric behaviour, in line with him inventing the looong castling
That C. Staugaard might be Conrad's younger brother Carl (who surely also knew about chess) is ruled out by the fact that Carl emigrated to South America in 1901, because he experienced disappointments in his love live... (2021-01-22)
A.Buchanan: Yes it said he had lots of amazing concepts. The idea about the banner for his nursemaid to take his children for walks without getting her arms stretched is very funny. This is our man. He also seems to have been a good man, and an effective businessman. And loved enough by his friends for a 120 page book to have been commissioned in his memory. He is reminiscent of other children’s authors like Edward Lear, Dr Seuss, Heinrich Hoffmann... I’m so happy that this problem has brought him back to our awareness (2021-01-23)
comment
Keywords: Unique Proof Game, Staugaard castling, Prenix (t), Promotion (t), Castling as mating move, Economy record
Genre: Retro, Fairies
Computer test: HC+ the last move can only have been 0^6 discovering mate & the first 9.5 moves are C+ Euclide 1.01.
FEN: rnbq3K/ppppr2p/4k3/3n2p1/3P4/8/PPP2PPP/RNB2BNR
Input: A.Buchanan, 2021-01-21
Last update: Rainer Staudte, 2021-05-10 more...
Genre: Retro, Fairies
Computer test: HC+ the last move can only have been 0^6 discovering mate & the first 9.5 moves are C+ Euclide 1.01.
FEN: rnbq3K/ppppr2p/4k3/3n2p1/3P4/8/PPP2PPP/RNB2BNR
Input: A.Buchanan, 2021-01-21
Last update: Rainer Staudte, 2021-05-10 more...
1. hxg8=D! a1=D+ 2. Kh2 Dg1+ 3. Kxg1 b1=D+ 4. Kh2 Dg1+ 5. Kxg1 c1=D+ 6. Kh2 Dg1+ 7. Kxg1 d1=D+ 8. Kh2 Dg1+ 9. Kxg1 e1=D+ 10. Kh2 Dg1+ 11. Kxg1 Sf4 12. f8=D#
My first queening record
Record of 2+5 queen promotions
http://superproblem.ru/archive/probl/N/Malcom-12x-2020.gif
My first queening record
Record of 2+5 queen promotions
http://superproblem.ru/archive/probl/N/Malcom-12x-2020.gif
Keywords: Promotion (Dd), Promotion key, Promotion in the mating move, Superseded by (P1378033), Capture key, Pendulum (K), Promotions to queens, konsekutive Umwandlungen 7 (DdddddD)
Genre: n#
Computer test: a. Baumann: Gustav 4.2a
FEN: 2n3r1/3BkP1P/4Pp2/8/8/6BP/pppppPn1/6Kb
Input: James Malcom, 2021-02-01
Last update: Dieter Berlin, 2023-12-08 more...
Genre: n#
Computer test: a. Baumann: Gustav 4.2a
FEN: 2n3r1/3BkP1P/4Pp2/8/8/6BP/pppppPn1/6Kb
Input: James Malcom, 2021-02-01
Last update: Dieter Berlin, 2023-12-08 more...
1. ... Kf8 2. Ke7 3. Kd8 4. Kc8 5. Kb8 6. Ka7 7. Ka6 8. Kb5 9. Kc5 10. Kxd5 11. Ke5 12. Kf5 13. Kxg4 14. Kf5 15. Ke4 16. Kd3 17. Kc2 18. Kxc1 19. Kc2 20. Kd3 21. Ke4 22. Kf5 23. Kg5 24. Kxh6 25. Kg5 26. h5 27. h4 28. hxg3 29. g2 30. g1=S 31. Se2 32. Sc3 33. Sxb1 34. Sd2 0-0-0
https://www.chessproblem.net/viewtopic.php?t=1079
https://www.chessproblem.net/viewtopic.php?t=1079
Keywords: Seriesmover, Castling
Genre: Fairies
Computer test: popeye 4.85
FEN: 4N1k1/5B1p/2P1P2P/P2P4/6R1/p4pP1/P4P2/RNB1K3
Input: James Malcom, 2021-03-21
Last update: Arnold Beine, 2021-04-12 more...
Genre: Fairies
Computer test: popeye 4.85
FEN: 4N1k1/5B1p/2P1P2P/P2P4/6R1/p4pP1/P4P2/RNB1K3
Input: James Malcom, 2021-03-21
Last update: Arnold Beine, 2021-04-12 more...
1. ... a5 Lb2 2. La6 Lc1 3. Lc8 Lb2 4. Ld7 Lc1 5. Le8 Lb2 6. Lg6 Lc1 7. Lf5 Lb2 8. Lh3 Lc1 9. Lf1 Lb2 10. Le2 Lc1 11. Ld1 Lb2 12. Lc2 Lc1 13. Lxb1 Lb2 14. La2 0-0-0
https://www.chessproblem.net/viewtopic.php?t=1079
https://www.chessproblem.net/viewtopic.php?t=1079
James Malcom: C+ by Jacobi with the restraints that wKe1 & wRa1 do not move. Here is the code.
English fors 8/8/p1p1p3/1bP1P2p/p1p4P/PkPp1p2/3P1P2/RNB1K3
option FirstToMove black
stip a=b8 pie whi ke1 ra1 addpieces
constraints Ke1(0..0) Ra1(0..0)
stip h006 (2022-06-12)
James Malcom: Meant EnglishN, a command that allows for avoidance of FEN editing with knight usage. (2022-06-12)
A.Buchanan: Jacobi constraints operate under the principle that castling doesn't count as a move for king or rook. I guess one can disable castling rights separately if one wanted? (Not relevant for this problem.)
Cheeky nit: can one remove wPf2? (2022-06-13)
James Malcom: I suppose that might be possible.
And yes, let me check if it can be removed. (2022-06-13)
Joost de Heer: The constraint is for the 'sub-position' after 8 moves, not for the h006 stipulation. It's to avoid searching lines like '1. Ra2 2. Ra1' where castling rights were lost along the way.
Another method to test would be
stip a=b1 pie whi ke1 ra1 addpieces
[repeat 13 times]
stip h001 (2022-06-13)
Joost de Heer: WHich also proves that f2 can indeed be removed (C+ in less than a second) (2022-06-13)
A.Buchanan: Thanks Joost for clarifications.
And how about also removing h-file pawns and adding bPf5? (2022-06-13)
James Malcom: That is illegal Andrew, requiring one capture too many. Nor does it change the move amount. (2022-06-13)
Joost de Heer: Black needs 7 captures, and 7 white pieces missing, so -Pf2, -Ph4, -Ph5, +bPf5 seems to work (and is C+ with the '13 a to b stipulations' test. (2022-06-13)
James Malcom: Ah, did not see that. Economical improvements are always nice--thanks both. (2022-06-13)
Joost de Heer: wBc1 to b2 is of course a correct h0014.5. (2022-06-14)
James Malcom: True, but for a new length record, longer than a measly ply, an entirely different setting may be needed. (2022-06-14)
Olaf Jenkner: I think, it's cooked.
Black can lose a tempo between a6 and a8 or between e8 and g6. (2022-06-14)
James Malcom: How so, Olaf? With White to move and wBc1-b2, there is no tempo to lose. Any delay by Black only causes further delay. (2022-06-15)
Olaf Jenkner: You are right, it's not a matter of tempos. (2022-06-15)
James Malcom: As always happens, I came across a 1997 problem with the same idea, albeit being mostly unique: P1000693 (2022-06-29)
comment
English fors 8/8/p1p1p3/1bP1P2p/p1p4P/PkPp1p2/3P1P2/RNB1K3
option FirstToMove black
stip a=b8 pie whi ke1 ra1 addpieces
constraints Ke1(0..0) Ra1(0..0)
stip h006 (2022-06-12)
James Malcom: Meant EnglishN, a command that allows for avoidance of FEN editing with knight usage. (2022-06-12)
A.Buchanan: Jacobi constraints operate under the principle that castling doesn't count as a move for king or rook. I guess one can disable castling rights separately if one wanted? (Not relevant for this problem.)
Cheeky nit: can one remove wPf2? (2022-06-13)
James Malcom: I suppose that might be possible.
And yes, let me check if it can be removed. (2022-06-13)
Joost de Heer: The constraint is for the 'sub-position' after 8 moves, not for the h006 stipulation. It's to avoid searching lines like '1. Ra2 2. Ra1' where castling rights were lost along the way.
Another method to test would be
stip a=b1 pie whi ke1 ra1 addpieces
[repeat 13 times]
stip h001 (2022-06-13)
Joost de Heer: WHich also proves that f2 can indeed be removed (C+ in less than a second) (2022-06-13)
A.Buchanan: Thanks Joost for clarifications.
And how about also removing h-file pawns and adding bPf5? (2022-06-13)
James Malcom: That is illegal Andrew, requiring one capture too many. Nor does it change the move amount. (2022-06-13)
Joost de Heer: Black needs 7 captures, and 7 white pieces missing, so -Pf2, -Ph4, -Ph5, +bPf5 seems to work (and is C+ with the '13 a to b stipulations' test. (2022-06-13)
James Malcom: Ah, did not see that. Economical improvements are always nice--thanks both. (2022-06-13)
Joost de Heer: wBc1 to b2 is of course a correct h0014.5. (2022-06-14)
James Malcom: True, but for a new length record, longer than a measly ply, an entirely different setting may be needed. (2022-06-14)
Olaf Jenkner: I think, it's cooked.
Black can lose a tempo between a6 and a8 or between e8 and g6. (2022-06-14)
James Malcom: How so, Olaf? With White to move and wBc1-b2, there is no tempo to lose. Any delay by Black only causes further delay. (2022-06-15)
Olaf Jenkner: You are right, it's not a matter of tempos. (2022-06-15)
James Malcom: As always happens, I came across a 1997 problem with the same idea, albeit being mostly unique: P1000693 (2022-06-29)
comment
67 - P1388091
Andrew Buchanan
James Malcom
PS3645 The Problemist Supplement 171, p. 139, 03/2021
(5+9) C+
#10
Andrew Buchanan
James Malcom
PS3645 The Problemist Supplement 171, p. 139, 03/2021
(5+9) C+
#10
1. h7! dxc2 2. h8=S d3 3. Sg6 d4 4. Sf4 d5 5. Sxd3 d6 6. Sxb4 d3 7. Sxd3 d4 8. b4 d5 9. Sc5 d3 10. Sb3#
Henrik Juel: C+ Popeye 4.61
At first sight I thought that 1.h7 Lxc2 2.h8=DL thr. 3.DLxd4# would be a cook
but Black defends better by 1... dxc2!
Very impressive that the main variation is dual-free (2021-04-03)
comment
At first sight I thought that 1.h7 Lxc2 2.h8=DL thr. 3.DLxd4# would be a cook
but Black defends better by 1... dxc2!
Very impressive that the main variation is dual-free (2021-04-03)
comment
1. Sf6! droht 2. Sd7#
1. ... Tbd3 2. Tb5#
1. ... Ted3 2. Txe2#
1. ... Lc6 2. Txe3#
1. ... Sxf6 2. Tg5#
1. ... Tbd3 2. Tb5#
1. ... Ted3 2. Txe2#
1. ... Lc6 2. Txe3#
1. ... Sxf6 2. Tg5#
Genre: 2#
Computer test: Popeye 4.61
FEN: 8/2p1K3/4N1B1/3Nk3/2P3np/pr2rbRq/1R2n2B/Q7
Input: James Malcom, 2021-04-10
Last update: Felber, Volker, 2021-12-16 more...
a) 1. a4 h5 2. Ta3 h4 3. Tg3 h3 4. gxh3 a5 5. Lg2 Ta6 6. Kf1 Tg6 7. De1 Txg3 8. hxg3
b) 1. a4 h5 2. Ta3 h4 3. Tg3 hxg3 4. hxg3 Th3 5. gxh3 a5 6. Lg2 Ta6 7. Kf1 Th6 8. De1 Th8
b) 1. a4 h5 2. Ta3 h4 3. Tg3 hxg3 4. hxg3 Th3 5. gxh3 a5 6. Lg2 Ta6 7. Kf1 Th6 8. De1 Th8
Henrik Juel: The first 2.5 moves are identical between the two parts
The remaining moves are delightfully different
Neat find (2021-04-17)
more ...
comment
The remaining moves are delightfully different
Neat find (2021-04-17)
more ...
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: parts a) & b) C+ Euclide 1.01. No solution in 7.0
FEN: 1nbqkbnr/1pppppp1/8/p7/P7/6PP/1PPPPPB1/1NB1QKNR
Input: A.Buchanan, 2021-04-17
Last update: A.Buchanan, 2021-04-17 more...
Genre: Retro
Computer test: parts a) & b) C+ Euclide 1.01. No solution in 7.0
FEN: 1nbqkbnr/1pppppp1/8/p7/P7/6PP/1PPPPPB1/1NB1QKNR
Input: A.Buchanan, 2021-04-17
Last update: A.Buchanan, 2021-04-17 more...
1. a4 h5 2. a5 h4 3. a6 Th5 4. axb7 a5 5. b4 Ta6 6. b5 Tc6 7. bxc6 Tb5 8. d4 e5 9. d5 Ld6 10. Dd4 exd4 11. e4 Lg3 12. Ke2 d6 13. f3
Keywords: Unique Proof Game
Genre: Retro
Computer test: Euclide 1.01
FEN: 1nbqk1n1/1Pp2pp1/2Pp4/pr1P4/3pP2p/5Pb1/2P1K1PP/RNB2BNR
Input: James Malcom, 2021-05-26
Last update: James Malcom, 2021-12-12 more...
Genre: Retro
Computer test: Euclide 1.01
FEN: 1nbqk1n1/1Pp2pp1/2Pp4/pr1P4/3pP2p/5Pb1/2P1K1PP/RNB2BNR
Input: James Malcom, 2021-05-26
Last update: James Malcom, 2021-12-12 more...
1. f8=D! g5 2. Tg8 Kh1 3. Dh6+ Kg1 4. Dxg5 Kh1 5. Dh4+ Kg1 6. Dxg3 Kh1 7. Th8+ Kg1 8. Dh2#
1. f8=S! g5 2. Sh7 Kh1 3. Sxg5+ Kg1 4. Sh3+ Kh1 5. Sxf2+ Kg1 6. Sh3+ Kh1 7. Sg5+ Kg1 8. Sxf3#
1. f8=S! g5 2. Sh7 Kh1 3. Sxg5+ Kg1 4. Sh3+ Kh1 5. Sxf2+ Kg1 6. Sh3+ Kh1 7. Sg5+ Kg1 8. Sxf3#
SCHRECKE: C+, Gustav 4.1d, Brute Force (2021-07-17)
Henrik Juel: C+ Popeye 4.61
1.f8=D g5 2.Tg8 Kh1 3.Dh6+ Kg1 4.Dxg5 Kh1 5.Dh4+ Kg1 6.Dxg3 Kh1 7.Th8+ Kg1 8.Dh2#
1.f8=S g5 2.Sh7 Kh1 3.Sxg5+ Kg1 4.Sh3+ Kh1 5.Sxf2+ Kg1 6.Sh3+ Kh1 7.Sg5+ Kg1 8.Sxf3#
Two very different solutions (2021-07-17)
James Malcom: See P1401781 for an improvement. (2022-06-12)
comment
Henrik Juel: C+ Popeye 4.61
1.f8=D g5 2.Tg8 Kh1 3.Dh6+ Kg1 4.Dxg5 Kh1 5.Dh4+ Kg1 6.Dxg3 Kh1 7.Th8+ Kg1 8.Dh2#
1.f8=S g5 2.Sh7 Kh1 3.Sxg5+ Kg1 4.Sh3+ Kh1 5.Sxf2+ Kg1 6.Sh3+ Kh1 7.Sg5+ Kg1 8.Sxf3#
Two very different solutions (2021-07-17)
James Malcom: See P1401781 for an improvement. (2022-06-12)
comment
Keywords: Promotion, Promotion key (D,S), Stalemate avoidance, Switchback (T), Superseded by (P1401781)
Computer test: Gustav 4.1d, Brute Force Popeye 4.61
FEN: 7R/5P2/6p1/8/6P1/4ppp1/4prp1/4Kbk1
Input: James Malcom, 2021-07-17
Last update: A.Buchanan, 2022-06-13 more...
Computer test: Gustav 4.1d, Brute Force Popeye 4.61
FEN: 7R/5P2/6p1/8/6P1/4ppp1/4prp1/4Kbk1
Input: James Malcom, 2021-07-17
Last update: A.Buchanan, 2022-06-13 more...
72 - P1393307
James Malcom
1627 Julias Fairies 22/06/2021
(13+14) C+
BP in 18.0 (-:
Dummy Pawn Promotion
James Malcom
1627 Julias Fairies 22/06/2021
(13+14) C+
BP in 18.0 (-:
Dummy Pawn Promotion
1. a4 f5 2. Ta3 f4 3. Th3 f3 4. g3 fxe2 5. Lg2 exd1=B 6. Lc6 dxc6 7. Ke2 Lg4+ 8. Ke3 e6 9. Se2 Lb4 10. Txd1 Lc3 11. dxc3 Sf6 12. Td5 Tf8 13. Ta5 Tf7 14. Ta6 Td7 15. a5 Td1 16. Ld2 Tg1 17. Le1 Tg2 18. Sd2 Dd3+
Henrik Juel: What is the (-: trick, James? (2021-08-30)
James Malcom: Nothing special; merely the usual. (2021-08-30)
Henrik Juel: Ah, the old dummy pawn...
Why not spell it out in the stipulation? Not everybody knows 'the usual', and I had forgotten all about it (2021-08-30)
James Malcom: Done! (2021-08-31)
comment
James Malcom: Nothing special; merely the usual. (2021-08-30)
Henrik Juel: Ah, the old dummy pawn...
Why not spell it out in the stipulation? Not everybody knows 'the usual', and I had forgotten all about it (2021-08-30)
James Malcom: Done! (2021-08-31)
comment
Keywords: Dummy Pawn, Move Length Record, Schnoebelen Theme, Golden Age (Dummy Pawn), Prentos Theme (B), Ceriani-Frolkin Theme (B), Unique Proof Game
Genre: Retro
Computer test: Jacobi v0.7.5 in 24 hours by Michael Caullaud
FEN: rn2k3/ppp3pp/R1p1pn2/P7/6b1/2PqK1PR/1PPNNPrP/4B3
Input: James Malcom, 2021-08-30
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro
Computer test: Jacobi v0.7.5 in 24 hours by Michael Caullaud
FEN: rn2k3/ppp3pp/R1p1pn2/P7/6b1/2PqK1PR/1PPNNPrP/4B3
Input: James Malcom, 2021-08-30
Last update: A.Buchanan, 2023-08-04 more...
73 - P1393313
Michel Caillaud
James Malcom
1639 Julias Fairies 07/30/2021
(14+13) C+
BP in 11.0
Dummy Pawn Promotion & Royal Dynasty
Michel Caillaud
James Malcom
1639 Julias Fairies 07/30/2021
(14+13) C+
BP in 11.0
Dummy Pawn Promotion & Royal Dynasty
1. d4 a5 2. d5 a4 3. d6 a3 4. dxe7 Ta4 5. exf8=B Dh4 6. g4 Ke7 7. g5 Ke6 8. g6 Se7 9. gxh7 Txf8 10. h8=K Tg4 11. f4 Dxh8
2 “special” Schnoebelen promotions in a single line
2 “special” Schnoebelen promotions in a single line
Henrik Juel: Definition of the Royal Dynasty condition from Schwalbe
Königsdynastie: Im Diagramm kann jede Partei keinen, einen oder mehrere Könige haben. Ein König ist genau dann königlich, wenn er der einzige König seiner Partei ist. Eine Bauernumwandlung in einen König (derselben Partei) ist erlaubt. Ein König darf nur dann rochieren, wenn er königlich ist und nicht gezogen hat, seit er zuletzt königlich wurde. Die anderen für die Rochade vorgeschriebenen Bedingungen bestehen weiter.
In this problem 10.h8=K makes both white kings non-royal, so 11.f4 is not an illegal self-check
The black king is royal throughout, so 5.exf8=KDTLS? would have given a disturbing check to him, leaving just 5.e8=B
It is nice that both conditions are invisible in the diagram, but they should be mentioned in the stipulation, I think (2021-08-30)
Henrik Juel: Euclide 1.01 reports no solutions in orthodox chess (2021-08-30)
Henrik Juel: in my first comment you should read 5.exf8=B, of course, not 5.e8=B (2021-08-30)
James Malcom: I forget to add the C+, and thank you for your comments. (2021-08-31)
Henrik Juel: Jacobi 0.7.5 in Heuristic Mode found the solution in 35 seconds
A full test required 917 seconds (2021-08-31)
Henrik Juel: Here is a way to use Jacobi:
1. Open the homepage https://wismuth.com/jacobi/latest/solver.html
2. Copy the following two lines to the rectangle for Text representation:
stipulation dia11.0 forsyth 1sb2r1q/1pppspp1/4k3/8/5Pr1/p7/PPP1P2P/RSBQKBSR
condition RoyalDynasty PromOnly P S B R Q K
3. Click on 'Set problem from text'
4. Click on Start (with Heuristic Mode marked, if you just want to find the solution)
5. When Jacobi ends, click on the solution to view it in the Game editor
. (2021-08-31)
James Malcom: For those who advocate N for knight, use "EnglishN" to avoid changing the FEN each time. (2021-08-31)
Henrik Juel: That sounds good, James
Exactly how do you do that? Where do you write EnglishN?
There is an output option called English-N, is that it?
Is there a similar trick to use in Popeye? (2021-08-31)
Henrik Juel: This works in Jacobi, but note the s in promonly
englishn
stipulation dia11.0 forsyth 1nb2r1q/1pppnpp1/4k3/8/5Pr1/p7/PPP1P2P/RNBQKBNR
cond RoyalDynasty PromOnly P s B R Q K
And what about Popeye? (2021-08-31)
James Malcom: Popeye is S only as far as I know. (2021-08-31)
comment
Königsdynastie: Im Diagramm kann jede Partei keinen, einen oder mehrere Könige haben. Ein König ist genau dann königlich, wenn er der einzige König seiner Partei ist. Eine Bauernumwandlung in einen König (derselben Partei) ist erlaubt. Ein König darf nur dann rochieren, wenn er königlich ist und nicht gezogen hat, seit er zuletzt königlich wurde. Die anderen für die Rochade vorgeschriebenen Bedingungen bestehen weiter.
In this problem 10.h8=K makes both white kings non-royal, so 11.f4 is not an illegal self-check
The black king is royal throughout, so 5.exf8=KDTLS? would have given a disturbing check to him, leaving just 5.e8=B
It is nice that both conditions are invisible in the diagram, but they should be mentioned in the stipulation, I think (2021-08-30)
Henrik Juel: Euclide 1.01 reports no solutions in orthodox chess (2021-08-30)
Henrik Juel: in my first comment you should read 5.exf8=B, of course, not 5.e8=B (2021-08-30)
James Malcom: I forget to add the C+, and thank you for your comments. (2021-08-31)
Henrik Juel: Jacobi 0.7.5 in Heuristic Mode found the solution in 35 seconds
A full test required 917 seconds (2021-08-31)
Henrik Juel: Here is a way to use Jacobi:
1. Open the homepage https://wismuth.com/jacobi/latest/solver.html
2. Copy the following two lines to the rectangle for Text representation:
stipulation dia11.0 forsyth 1sb2r1q/1pppspp1/4k3/8/5Pr1/p7/PPP1P2P/RSBQKBSR
condition RoyalDynasty PromOnly P S B R Q K
3. Click on 'Set problem from text'
4. Click on Start (with Heuristic Mode marked, if you just want to find the solution)
5. When Jacobi ends, click on the solution to view it in the Game editor
. (2021-08-31)
James Malcom: For those who advocate N for knight, use "EnglishN" to avoid changing the FEN each time. (2021-08-31)
Henrik Juel: That sounds good, James
Exactly how do you do that? Where do you write EnglishN?
There is an output option called English-N, is that it?
Is there a similar trick to use in Popeye? (2021-08-31)
Henrik Juel: This works in Jacobi, but note the s in promonly
englishn
stipulation dia11.0 forsyth 1nb2r1q/1pppnpp1/4k3/8/5Pr1/p7/PPP1P2P/RNBQKBNR
cond RoyalDynasty PromOnly P s B R Q K
And what about Popeye? (2021-08-31)
James Malcom: Popeye is S only as far as I know. (2021-08-31)
comment
Keywords: Dummy Pawn, Royal Dynasty, Promotion (BK), Schnoebelen Theme (BK), Unique Proof Game, Prentos Theme (BK), Ceriani-Frolkin Theme (BK), Golden Age (Dummy Pawn)
Genre: Retro, Fairies
Computer test: Jacobi v0.7.5
FEN: 1nb2r1q/1pppnpp1/4k3/8/5Pr1/p7/PPP1P2P/RNBQKBNR
Input: James Malcom, 2021-08-30
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro, Fairies
Computer test: Jacobi v0.7.5
FEN: 1nb2r1q/1pppnpp1/4k3/8/5Pr1/p7/PPP1P2P/RNBQKBNR
Input: James Malcom, 2021-08-30
Last update: A.Buchanan, 2023-08-04 more...
1. 0-0-0! a5 2. Kb1 f6 3. Ka1 g4 4. Tb1 g3 5. Lc1 Lf2 6. Ld2+ Lg1 7. Le1 Lf2 8. Lxf2#
75 - P1396159
Tivadar Kardos
James Malcom
Andrew Buchanan
PDB Website 24/11/2021
TK, correction JM & AB
(6+15) C+
h#3
Tivadar Kardos
James Malcom
Andrew Buchanan
PDB Website 24/11/2021
TK, correction JM & AB
(6+15) C+
h#3
1. dxe3ep+ Kxc4 2. Lc3 Sxc2 3. Ta5 axb3#
R: 1. e2-e4 Tf3-d3+ 2. Ke4-d5
See P0003211
Example Proof Game: 1. b3 a5 2. c4 a4 3. Na3 b5 4. d4 c5 5. Bg5 h6 6. f4 hxg5 7. Nf3 gxf4 8. Qd3 bxc4 9. Nc2 axb3 10. Rc1 Bb7 11. Na1 Nf6 12. Rc3 Nh5 13. Qe3 fxe3 14. Nd2 exd2+ 15. Kf2 Nf4 16. Rg1 Nh3+ 17. gxh3 Bh1 18. Rcg3 Ra6 19. Rg6 Rf6+ 20. Ke3 Rh5 21. Bg2 Nc6 22. Be4 Na5 23. Bc2 bxc2 24. R1g4 Rf3+ 25. Ke4 Nb3 26. Rd6 exd6 27. Rf4 Qh4 28. Rg4 Qe1 29. Rf4 Kd8 30. Rg4 Kc7 31. Rf4 Kb6 32. Rg4 Ka5 33. Rf4 Ka4 34. Rg4 Rhf5 35. Rh4 g5 36. Rg4 Bg7 37. Rh4 Be5 38. Rf4 cxd4 39. Rg4 f6 40. Rh4 Qf1 41. Rf4 gxf4 42. Kd5 Rd3+ 43. e4
R: 1. e2-e4 Tf3-d3+ 2. Ke4-d5
See P0003211
Example Proof Game: 1. b3 a5 2. c4 a4 3. Na3 b5 4. d4 c5 5. Bg5 h6 6. f4 hxg5 7. Nf3 gxf4 8. Qd3 bxc4 9. Nc2 axb3 10. Rc1 Bb7 11. Na1 Nf6 12. Rc3 Nh5 13. Qe3 fxe3 14. Nd2 exd2+ 15. Kf2 Nf4 16. Rg1 Nh3+ 17. gxh3 Bh1 18. Rcg3 Ra6 19. Rg6 Rf6+ 20. Ke3 Rh5 21. Bg2 Nc6 22. Be4 Na5 23. Bc2 bxc2 24. R1g4 Rf3+ 25. Ke4 Nb3 26. Rd6 exd6 27. Rf4 Qh4 28. Rg4 Qe1 29. Rf4 Kd8 30. Rg4 Kc7 31. Rf4 Kb6 32. Rg4 Ka5 33. Rf4 Ka4 34. Rg4 Rhf5 35. Rh4 g5 36. Rg4 Bg7 37. Rh4 Be5 38. Rf4 cxd4 39. Rg4 f6 40. Rh4 Qf1 41. Rf4 gxf4 42. Kd5 Rd3+ 43. e4
Henrik Juel: Black pawns captured all 10 missing white men, and White captured g2xSh3
Last move was not e3-e4 (because of the check from Lh1), but e2-e4
HC+ Popeye 4.61 (2021-11-24)
A.Buchanan: I’d like to claim that Popeye + Retractor + example proof game means this problem is C+. If not, what more would be required. (2021-11-24)
Henrik Juel: I guess that suffices (2021-11-24)
comment
Last move was not e3-e4 (because of the check from Lh1), but e2-e4
HC+ Popeye 4.61 (2021-11-24)
A.Buchanan: I’d like to claim that Popeye + Retractor + example proof game means this problem is C+. If not, what more would be required. (2021-11-24)
Henrik Juel: I guess that suffices (2021-11-24)
comment
Keywords: En passant as key, Checking key
Genre: h#, Retro
Computer test: C+ Popeye 4.61 for forward play Retractor 2.0 for retraction Lichess to check demo game
FEN: 8/3p4/3p1p2/3Kbr2/k1ppPp2/1n1r3P/P1pp3P/N4q1b
Input: James Malcom, 2021-11-24
Last update: A.Buchanan, 2023-07-13 more...
Genre: h#, Retro
Computer test: C+ Popeye 4.61 for forward play Retractor 2.0 for retraction Lichess to check demo game
FEN: 8/3p4/3p1p2/3Kbr2/k1ppPp2/1n1r3P/P1pp3P/N4q1b
Input: James Malcom, 2021-11-24
Last update: A.Buchanan, 2023-07-13 more...
1. Sxc3+! Kc2 2. b8=L d5 3. exd6ep Txd6 4. Lxd6 Kd3 5. 0-0-0#
3. ... Te8+ 4. Sxe8 Kd3 5. 0-0-0#
http://www.berlinthema.de/Auswahl_PH.pdf
"James Malcom erforscht weiter den Valladao-Belén, hier mit weißer Läuferumwandlung auf
einem neuen Feld. Nun ist die vorliegende Schrift zwar keine Sammlung aller ValladaoBeléns, doch im vorliegenden Falle gelang es ihm, den schwarzen Schlag auf b1 weitgehend
ungefährlich werden zu lassen, und im Ergebnis sehen wir en-passant-spezifische Taktik auf
beiden Seiten! Die Verführung widerlegt Schwarz, indem er mittels der richtigen Reihenfolge-Auswahl Abstand zwischen den Doppelschritt und den potentiellen En-passant-Schlag
bringt; Weiß kontert dies seinerseits durch eine Reihenfolge-Auswahl, welche den Abstand
(wieder) verkürzt."
Reprint: http://www.berlinthema.de/ep_EZ.pdf
3. ... Te8+ 4. Sxe8 Kd3 5. 0-0-0#
http://www.berlinthema.de/Auswahl_PH.pdf
"James Malcom erforscht weiter den Valladao-Belén, hier mit weißer Läuferumwandlung auf
einem neuen Feld. Nun ist die vorliegende Schrift zwar keine Sammlung aller ValladaoBeléns, doch im vorliegenden Falle gelang es ihm, den schwarzen Schlag auf b1 weitgehend
ungefährlich werden zu lassen, und im Ergebnis sehen wir en-passant-spezifische Taktik auf
beiden Seiten! Die Verführung widerlegt Schwarz, indem er mittels der richtigen Reihenfolge-Auswahl Abstand zwischen den Doppelschritt und den potentiellen En-passant-Schlag
bringt; Weiß kontert dies seinerseits durch eine Reihenfolge-Auswahl, welche den Abstand
(wieder) verkürzt."
Reprint: http://www.berlinthema.de/ep_EZ.pdf
Keywords: Belen Theme
Genre: n#
FEN: B2r4/1P1p2N1/5p2/2p1PP2/2p3p1/Bpn2pP1/1P3P2/RNk1K3
Input: James Malcom, 2021-12-26
Last update: James Malcom, 2021-12-26 more...
Genre: n#
FEN: B2r4/1P1p2N1/5p2/2p1PP2/2p3p1/Bpn2pP1/1P3P2/RNk1K3
Input: James Malcom, 2021-12-26
Last update: James Malcom, 2021-12-26 more...
1. Sxc3+! Kc2 2. f8=L d5 3. cxd6ep Txd6 4. Lxd6 Kd3 5. 0-0-0#
3. ... Tc8 4. Dd5 Tc4 5. Dd1#,Dd2#
"Noch ein anderes Feld für die Läuferumwandlung; der Schlüssel ist etwas besser. Die enpassant-spezifischen Taktiken sind die gleichen wie in der vorherigen Aufgabe. [P1397490]"
Reprint: http://www.berlinthema.de/ep_EZ.pdf
3. ... Tc8 4. Dd5 Tc4 5. Dd1#,Dd2#
"Noch ein anderes Feld für die Läuferumwandlung; der Schlüssel ist etwas besser. Die enpassant-spezifischen Taktiken sind die gleichen wie in der vorherigen Aufgabe. [P1397490]"
Reprint: http://www.berlinthema.de/ep_EZ.pdf
Keywords: Belen Theme
FEN: 3rB1Q1/3p1P2/6P1/2P1p3/1P2p3/Bpp1Pp2/pP3P2/RNk1K3
Input: James Malcom, 2021-12-26
Last update: James Malcom, 2021-12-26 more...
FEN: 3rB1Q1/3p1P2/6P1/2P1p3/1P2p3/Bpp1Pp2/pP3P2/RNk1K3
Input: James Malcom, 2021-12-26
Last update: James Malcom, 2021-12-26 more...
SCHRECKE: Die Idee ist als Miniatur darstellbar!
W: Kh4,Ta1,Ld1,Sg1 (4) - S: Kh2,Be2,Bf2 (3)
Lösung: 1.e1B Lf3 2.f:g1B Ta2# (2022-01-25)
more ...
comment
W: Kh4,Ta1,Ld1,Sg1 (4) - S: Kh2,Be2,Bf2 (3)
Lösung: 1.e1B Lf3 2.f:g1B Ta2# (2022-01-25)
more ...
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Keywords: Dummy Pawn, Golden Age (Dummy Pawn)
Genre: h#
Computer test: C+, popeye 4.87, bedingung UWnur D T L S B
FEN: 8/8/8/8/3RP2K/4P3/5ppk/7B
Input: James Malcom, 2022-01-16
Last update: A.Buchanan, 2023-08-04 more...
Genre: h#
Computer test: C+, popeye 4.87, bedingung UWnur D T L S B
FEN: 8/8/8/8/3RP2K/4P3/5ppk/7B
Input: James Malcom, 2022-01-16
Last update: A.Buchanan, 2023-08-04 more...
79 - P1398666
James Malcom
Michael Schreckenbach
Andrew Buchanan
PDB Website 26/01/2022
(4+3) C+
h#2 (-:
James Malcom
Michael Schreckenbach
Andrew Buchanan
PDB Website 26/01/2022
(4+3) C+
h#2 (-:
1. g1=B Lf3 2. e1=B Te2#
AB: economy record for 2 Dummy Pawns in h#. Miniature. Aimless promotion.
Henrik Juel: wPg3 prevents cooks like 1.Kg1 Kg3 2.e1=DTLSB Txe1# (2022-01-27)
more ...
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Henrik Juel: wPg3 prevents cooks like 1.Kg1 Kg3 2.e1=DTLSB Txe1# (2022-01-27)
more ...
comment
Keywords: Dummy Pawn, Golden Age (Dummy Pawn), Miniature, Tempo Move (Promotion)
Genre: h#
Computer test: C+ Popeye 4.79
FEN: 8/8/8/8/4R2K/6P1/4p1pk/7B
Input: A.Buchanan, 2022-01-27
Last update: A.Buchanan, 2023-08-04 more...
Genre: h#
Computer test: C+ Popeye 4.79
FEN: 8/8/8/8/4R2K/6P1/4p1pk/7B
Input: A.Buchanan, 2022-01-27
Last update: A.Buchanan, 2023-08-04 more...
1. a5 gxh3 2. a4 h4 3. a3 h5 4. a2 h6 5. a1=T h7 6. Ta2 h8=D 7. Tc2 Da1#
1. a6 gxh3 2. a5 h4 3. a4 h5 4. a3 h6 5. a2 h7 6. a1=T h8=D 7. Tb1 Dc3#
1. Kc2 gxh3 2. gxh3 g4 3. h2 g5 4. h1=L g6 5. Lf3 g7 6. Lxe2 g8=D 7. Kd3 Db3#
https://www.chess.com/forum/view/more-puzzles/helpmate-3
1. a6 gxh3 2. a5 h4 3. a4 h5 4. a3 h6 5. a2 h7 6. a1=T h8=D 7. Tb1 Dc3#
1. Kc2 gxh3 2. gxh3 g4 3. h2 g5 4. h1=L g6 5. Lf3 g7 6. Lxe2 g8=D 7. Kd3 Db3#
https://www.chess.com/forum/view/more-puzzles/helpmate-3
Yuri Bilokin: you can see 1...gxh3 2.a5 h4 3.a4 h5 4.a3 h6 5.a2 h7 6.a1=R h8=Q 7.Rb1 Qc3# (2022-06-12)
more ...
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more ...
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Keywords: Kindergarten Problem, Promotion (tD, lD)
Computer test: Gustav 4.2a, Brute Force
FEN: 8/p7/8/8/4p1p1/4P1Pp/4P1P1/2k1K3
Input: James Malcom, 2022-02-18
Last update: James Malcom, 2022-06-12 more...
Computer test: Gustav 4.2a, Brute Force
FEN: 8/p7/8/8/4p1p1/4P1Pp/4P1P1/2k1K3
Input: James Malcom, 2022-02-18
Last update: James Malcom, 2022-06-12 more...
James Malcom: I had a thought looking at this again. Does n7/1P2P3/Q3P3/1r6/N1k1KP2/Pr6/B2p1p2/n7 work to save another piece? (2022-04-02)
A.Buchanan: James, yes your version does save another unit for your lovely idea. Beyond this, a version n7/1P2P3/Q7/Br6/2kPKP2/1r6/B2p1p2/n7 saves another unit, and forces a unique order on the Black promotions too. To avoid distracting unachievable threats, set NoThreat as well as the usual NoShortVariations. Your composition has driven me finally to report a long-standing Olive bug that cruelly punishes we Dummy Pawn enthusiasts: https://github.com/dturevski/olive-gui/issues/54. (2022-04-03)
James Malcom: Thanks for the verification and shaving off a unit, Andrew. (2022-04-03)
more ...
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A.Buchanan: James, yes your version does save another unit for your lovely idea. Beyond this, a version n7/1P2P3/Q7/Br6/2kPKP2/1r6/B2p1p2/n7 saves another unit, and forces a unique order on the Black promotions too. To avoid distracting unachievable threats, set NoThreat as well as the usual NoShortVariations. Your composition has driven me finally to report a long-standing Olive bug that cruelly punishes we Dummy Pawn enthusiasts: https://github.com/dturevski/olive-gui/issues/54. (2022-04-03)
James Malcom: Thanks for the verification and shaving off a unit, Andrew. (2022-04-03)
more ...
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Keywords: Dummy Pawn, Golden Age (Dummy Pawn), Superseded by (P1411297)
Genre: Fairies, r#
Computer test: Henrik Juel: C+ Popeye 4.87 (2022-04-02)
FEN: n7/1P2P3/Q7/Br6/2kPKP2/1r6/B2p1p2/n7
Input: James Malcom, 2022-04-02
Last update: A.Buchanan, 2023-12-14 more...
Genre: Fairies, r#
Computer test: Henrik Juel: C+ Popeye 4.87 (2022-04-02)
FEN: n7/1P2P3/Q7/Br6/2kPKP2/1r6/B2p1p2/n7
Input: James Malcom, 2022-04-02
Last update: A.Buchanan, 2023-12-14 more...
1. f8=D! g5 2. Tg8 Kh1 3. Dh6+ Kg1 4. Dxg5 Kh1 5. Dh4+ Kg1 6. Dxg3 Kh1 7. Th8+ Kg1 8. Dh2#
1. f8=L! g5 2. Lh6 Kh2 3. Lxg5+ Kg1 4. Lh6 Kh2 5. Lxe3+ Kg1 6. Lbd4 b2 7. Lxf2+ gxf2+ 8. Lxf2#
1. f8=S! g5 2. Sh7 Kh1 3. Sxg5+ Kg1 4. Sh3+ Kh1 5. Sxf2+ Kg1 6. Sh3+ Kh1 7. Sg5+ Kg1 8. Sxf3#
Improvement upon P1391856
1. f8=L! g5 2. Lh6 Kh2 3. Lxg5+ Kg1 4. Lh6 Kh2 5. Lxe3+ Kg1 6. Lbd4 b2 7. Lxf2+ gxf2+ 8. Lxf2#
1. f8=S! g5 2. Sh7 Kh1 3. Sxg5+ Kg1 4. Sh3+ Kh1 5. Sxf2+ Kg1 6. Sh3+ Kh1 7. Sg5+ Kg1 8. Sxf3#
Improvement upon P1391856
Keywords: Promotion (D,L,S), Promotion key, Stalemate avoidance, Switchback (T)
Computer test: Popeye 4.61
FEN: 7R/5P2/6p1/8/6P1/1p2ppp1/1B2prp1/4Kbk1
Input: James Malcom, 2022-06-11
Last update: James Malcom, 2022-06-12 more...
Computer test: Popeye 4.61
FEN: 7R/5P2/6p1/8/6P1/1p2ppp1/1B2prp1/4Kbk1
Input: James Malcom, 2022-06-11
Last update: James Malcom, 2022-06-12 more...
1. Txa5+ Kxa5 2. Dc7+ Ka4 3. Dc4+ Ka5 4. Dd5+ Ka4 5. Dxd4+ Ka5 6. Dd5+ Ka4 7. De4+ Ka5 8. Df5+ Ka4 9. Dxf4+ Ka5 10. Df5+ Ka4 11. Dg4+ Ka5 12. Dh5+ Ka4 13. Dd1+ Lc2 14. Dxc2+ Ka5 15. Dc7+ Ka4 16. Dc4+ Ka5 17. Dd5+ Ka4 18. De4+ Ka5 19. Df5+ Ka4 20. Dg4+ Ka5 21. Dh5+ d5 22. Dxd5+ Ka4 23. De4+ Ka5 24. Df5+ Ka4 25. Dg4+ Ka5 26. Dh5+ d5 27. Dxd5+ Ka4 28. De4+ Ka5 29. Df5+ Ka4 30. Dg4+ Ka5 31. Dh5+ f5 32. Dxf5+ Ka4 33. Dg4+ Ka5 34. Dh5+ f5 35. Dxf5+ Ka4 36. Dg4+ Ka5 37. Dh5+ Ka4 38. Dd1+ Sb3 39. Dxb3+ Ka5 40. Dd5+ Ka4 41. De4+ Ka5 42. Df5+ Ka4 43. Dg4+ Ka5 44. Dh5+ Ka4 45. Dd1+ Ka5 46. Dxe1+ Ka4 47. Db4#
Blahty's #58: https://www.yacpdb.org/#277999
Blahty's #58: https://www.yacpdb.org/#277999
James Malcom: To my knowledge, the (dualless) length record for consecutive checks in the #n. (2023-06-16)
comment
comment
Keywords: Consecutive checks (47), Move Length Record
Genre: n#
FEN: 1nQ4K/3p1p2/p2p1p2/q1R5/k2p1p2/p2PP2P/rR4Pr/1bn1b3
Input: Felber, Volker, 2022-06-22
Last update: James Malcom, 2023-06-16 more...
Genre: n#
FEN: 1nQ4K/3p1p2/p2p1p2/q1R5/k2p1p2/p2PP2P/rR4Pr/1bn1b3
Input: Felber, Volker, 2022-06-22
Last update: James Malcom, 2023-06-16 more...
84 - P1402237
James Malcom
Jacques Rotenberg
Problemiste 2012
JR Version JM
SuperProblem.net 01/06/2022
(9+14)
#10
James Malcom
Jacques Rotenberg
Problemiste 2012
JR Version JM
SuperProblem.net 01/06/2022
(9+14)
#10
1. Sfxe7+ cxd5+ 2. Sxd5+ Sef6+ 3. Sdxf6+ d5+ 4. Sxd5+ Sf6+ 5. Sdxf6+ d5+ 6. Sxd5+ Te7+ 7. Sdxe7+ Ld5+ 8. Dxd5+ f5+ 9. Sxf5+ Te7+ 10. Sfxe7#
7. ... f5+ 8. Sxf5+ Te7+ 9. Sfxe7+ Ld5+ 10. Dxd5#
See P1298074
Record for consecutive checks in a legal directmate
http://superproblem.ru/archive/probl/N/Rotenberg-10x-2012.gif
7. ... f5+ 8. Sxf5+ Te7+ 9. Sfxe7+ Ld5+ 10. Dxd5#
See P1298074
Record for consecutive checks in a legal directmate
http://superproblem.ru/archive/probl/N/Rotenberg-10x-2012.gif
Henrik Juel: mate trial in first variation
9.Sxf5+ Kh5 10.Sxg7,Sg3,Th4# (2022-06-26)
Jacques Rotenberg: If you really want a legal diagramme, you can begin after the key of P1298074, black to play, it will be legal and the longest sequence of checks (2022-06-30)
Jacques Rotenberg: ...doing so is not really enough ... no last move!
a tricky way would be - from diag P1298074 : - f5, -e7, + white knight f6 with 20 checks ahead + 2 retro checks ! (2022-07-01)
Jacques Rotenberg: ...not good either (2022-07-05)
Jacques Rotenberg: btw, I don't agree that my name will be as author of this diagram.
I am author of P1298074 not of this. (2022-07-08)
comment
9.Sxf5+ Kh5 10.Sxg7,Sg3,Th4# (2022-06-26)
Jacques Rotenberg: If you really want a legal diagramme, you can begin after the key of P1298074, black to play, it will be legal and the longest sequence of checks (2022-06-30)
Jacques Rotenberg: ...doing so is not really enough ... no last move!
a tricky way would be - from diag P1298074 : - f5, -e7, + white knight f6 with 20 checks ahead + 2 retro checks ! (2022-07-01)
Jacques Rotenberg: ...not good either (2022-07-05)
Jacques Rotenberg: btw, I don't agree that my name will be as author of this diagram.
I am author of P1298074 not of this. (2022-07-08)
comment
Keywords: Consecutive checks (19)
Genre: n#
FEN: 3Bn1N1/qrrpbppn/1Ppp2p1/2QR1Nk1/3PKR2/8/b7/8
Input: James Malcom, 2022-06-26
Last update: James Malcom, 2022-06-26 more...
Genre: n#
FEN: 3Bn1N1/qrrpbppn/1Ppp2p1/2QR1Nk1/3PKR2/8/b7/8
Input: James Malcom, 2022-06-26
Last update: James Malcom, 2022-06-26 more...
1. Sxf5! droht 2. Le3#
1. ... Lc3+ 2. Ka4 Ta6+ 3. bxa6 Te2,Txd3 4. g3+ Sxg3 5. Lxg3#
A birthday gift
1. ... Lc3+ 2. Ka4 Ta6+ 3. bxa6 Te2,Txd3 4. g3+ Sxg3 5. Lxg3#
A birthday gift
Keywords: Symbol problem, Capture key
Genre: h#
Computer test: SCHRECKE: C+, Gustav 4.2a, Brute Force (2022-06-30)
FEN: 8/8/2r2bp1/1P1Q1p1n/1KpN1kP1/1P1P1N1P/1p1r1BP1/8
Input: James Malcom, 2022-06-30
Last update: Gunter Jordan, 2022-06-30 more...
Genre: h#
Computer test: SCHRECKE: C+, Gustav 4.2a, Brute Force (2022-06-30)
FEN: 8/8/2r2bp1/1P1Q1p1n/1KpN1kP1/1P1P1N1P/1p1r1BP1/8
Input: James Malcom, 2022-06-30
Last update: Gunter Jordan, 2022-06-30 more...
1. c7-c8=D! b2-b1=S+! 2. Df1xb1 a2xb1=S+ 3. Kc3-d3 e2-e1=S+ 4. Kd3-e3 f2-f1=S+! 5. Ke3-f2 h2-h1=S+ 6. Kf2xe1 f3-f2+ 7. Ke1-e2 Sf1-g3+ 8. Ke2-e3 Sa1-c2+ 9. Lb3xc2 f2-f1=S+ 10. Ke3-f3 Sb1xd2+ 11. Td5xd2 g2-g1=S+ 12. Kf3-g2 Sh5-f4+ 13. Tg4xf4 Sf1-e3+ 14. Kg2xg1 Sg3-e2+ 15. Td2xe2 Sh1-f2 16. Dc8-b7#
6. ... Sa1-c2+ 7. Lb3xc2 f3-f2+ 8. Ke1-e2 Sf1-g3+ 9. Ke2-e3 f2-f1=S+ 10. Ke3-f3 ...
4. ... Sa1-c2+ 5. Lb3xc2 f2-f1=S+ 6. Ke3-f2 h2-h1=S+ 7. Kf2xe1 f3-f2+ 8. Ke1-e2 ...
Judge Oto Mihalco, final award 10/2022
6. ... Sa1-c2+ 7. Lb3xc2 f3-f2+ 8. Ke1-e2 Sf1-g3+ 9. Ke2-e3 f2-f1=S+ 10. Ke3-f3 ...
4. ... Sa1-c2+ 5. Lb3xc2 f2-f1=S+ 6. Ke3-f2 h2-h1=S+ 7. Kf2xe1 f3-f2+ 8. Ke1-e2 ...
Judge Oto Mihalco, final award 10/2022
Henrik Juel: Popeye 4.61 with 'opt thr 1' found no flaws
Congratulations, James (2022-10-08)
msterkowiec: Strange, I seem to see #12 here ( kB1N4/2P5/8/2pRP2n/2P1P1R1/bBK2p2/pp1Ppppp/n4Q2 ) with 1.R:c5 for example like this: 1... b1N+ 2. Q:b1 ab1N+ 3. Kd4 N:b3+ 4. Kd5 Nc3+ 5. dc3 Nf6+ 6. ef6 f1Q/e1Q 7.c8Q etc. (2022-10-09)
SCHRECKE: Ja, NL in 12 Zügen: 1. Txc5 (Gustav 4.2b) (2022-10-09)
James Malcom: Thank you Henrik.
Strange, this usually never happens to me. This is indeed the position I sent. Yet I know I tested for Txc5. I made a mistake, but I forget how. In any case, Td5-d7 seems to fix the issue? (2022-10-09)
msterkowiec: Yes, in position #16 kB1N4/2PR4/8/2p1P2n/2P1P1R1/bBK2p2/pp1Ppppp/n4Q2 John Galt 4.6 finds no other solution but 1.c8Q.
BTW: here you can find a link to it: http://szachowe.pl/viewtopic.php?f=18&p=118120&sid=6e44d27ffcffe4cf867c23001ab11773#p118120
I write to be super fast and I believe it can save quite much time of chess composers...
(It's not a popular piece of software and Windows pops out quite many warnings about it, anyway it's enough to trust your antivirus) (2022-10-12)
Olaf Jenkner: The position Td7 is C+ (Gustav 4.2 b)
There are three full length variations. (2022-10-13)
comment
Congratulations, James (2022-10-08)
msterkowiec: Strange, I seem to see #12 here ( kB1N4/2P5/8/2pRP2n/2P1P1R1/bBK2p2/pp1Ppppp/n4Q2 ) with 1.R:c5 for example like this: 1... b1N+ 2. Q:b1 ab1N+ 3. Kd4 N:b3+ 4. Kd5 Nc3+ 5. dc3 Nf6+ 6. ef6 f1Q/e1Q 7.c8Q etc. (2022-10-09)
SCHRECKE: Ja, NL in 12 Zügen: 1. Txc5 (Gustav 4.2b) (2022-10-09)
James Malcom: Thank you Henrik.
Strange, this usually never happens to me. This is indeed the position I sent. Yet I know I tested for Txc5. I made a mistake, but I forget how. In any case, Td5-d7 seems to fix the issue? (2022-10-09)
msterkowiec: Yes, in position #16 kB1N4/2PR4/8/2p1P2n/2P1P1R1/bBK2p2/pp1Ppppp/n4Q2 John Galt 4.6 finds no other solution but 1.c8Q.
BTW: here you can find a link to it: http://szachowe.pl/viewtopic.php?f=18&p=118120&sid=6e44d27ffcffe4cf867c23001ab11773#p118120
I write to be super fast and I believe it can save quite much time of chess composers...
(It's not a popular piece of software and Windows pops out quite many warnings about it, anyway it's enough to trust your antivirus) (2022-10-12)
Olaf Jenkner: The position Td7 is C+ (Gustav 4.2 b)
There are three full length variations. (2022-10-13)
comment
Keywords: konsekutive Umwandlungen 8 (Dsssssss)
Genre: n#
FEN: kB1N4/2P5/8/2pRP2n/2P1P1R1/bBK2p2/pp1Ppppp/n4Q2
Input: Marcin Banaszek, 2022-10-08
Last update: Olaf Jenkner, 2022-10-13 more...
Genre: n#
FEN: kB1N4/2P5/8/2pRP2n/2P1P1R1/bBK2p2/pp1Ppppp/n4Q2
Input: Marcin Banaszek, 2022-10-08
Last update: Olaf Jenkner, 2022-10-13 more...
1. Sh3! g1=T 2. Lxg1 fxg1=T 3. Sxg1 e1=T 4. Sh3 Teg1 5. Sxg1 d1=T 6. Sh3 Tdg1 7. Sxg1 c1=T 8. Sh3 Tcg1 9. Sxg1 b1=T 10. Sh3 Tbg1 11. Sxg1 a1=T 12. Sh3 Tag1 13. Sxg1 d3 14. Sh3 d2 15. Sg5+ Txg5#
SuperProblem 2022 Informal Tourney; Selfmates
http://superproblem.ru/htm/tourneys/annual-it/2022/selfmates_2022.html
Record task of 7 Black rook promotions in a selfmate
Previous record: P1225124
SuperProblem 2022 Informal Tourney; Selfmates
http://superproblem.ru/htm/tourneys/annual-it/2022/selfmates_2022.html
Record task of 7 Black rook promotions in a selfmate
Previous record: P1225124
Henrik Juel: Very impressive, James
Black needs to post a promoted rook on g1 again and again to prevent the threat 2.Sg5+ T7xg5#
A promoted queen does not work, because of 2... Dxg5#
You should label it C+, despite the possible duals in short variations, I think (2023-06-03)
James Malcom: Thanks.
Labeled as intended, now.
This task took over two years to realize: http://superproblem.ru/archive/Labor/Malcom-S.html (2023-06-03)
comment
Black needs to post a promoted rook on g1 again and again to prevent the threat 2.Sg5+ T7xg5#
A promoted queen does not work, because of 2... Dxg5#
You should label it C+, despite the possible duals in short variations, I think (2023-06-03)
James Malcom: Thanks.
Labeled as intended, now.
This task took over two years to realize: http://superproblem.ru/archive/Labor/Malcom-S.html (2023-06-03)
comment
Keywords: Promotion (ttttttt x7), Construction record, Construction task, konsekutive Umwandlungen 7 (ttttttt)
Genre: s#
Computer test: Gustav 4.2b Brute Force "only full length variations"
FEN: 5br1/3Qnkr1/5n1K/3P3P/3pPR2/5P2/pppppppB/6N1
Input: James Malcom, 2023-06-03
Last update: James Malcom, 2023-06-03 more...
Genre: s#
Computer test: Gustav 4.2b Brute Force "only full length variations"
FEN: 5br1/3Qnkr1/5n1K/3P3P/3pPR2/5P2/pppppppB/6N1
Input: James Malcom, 2023-06-03
Last update: James Malcom, 2023-06-03 more...
1. cxd8=B+ Kd6 2. e8=B+ Ke6 3. Lc4+ Kxf6 4. Le7+ Kxg6 5. g8=B Txh3#
Improvement in move number and economy over P1379580.
Improvement in move number and economy over P1379580.
SCHRECKE: Here is a s#7 with 4 dummy pawns: QnRn1B1K/P1P1P1P1/k1N5/3p2p1/2PPB1P1/8/4p1pR/4Nbrr
1. axb8=B+! Kb6 2. Da7+ Kxc6 3. cxd8=B+ Kd6 4. e8=B+ Ke6 5. Lxd5+ Kf6 6. Le7+ Kg6 7. g8=B Txh2#
Who makes it better? (2023-06-07)
James Malcom: Wonderfully done. I had an illegal scheme for four I never realized, but now it is done: 1RrRq1BK/pP1P1PP1/Pk2N1N1/p3p1p1/p2PP1P1/3Q3p/6pr/6Bb
I see no improvements to yours, yet. (2023-06-07)
comment
1. axb8=B+! Kb6 2. Da7+ Kxc6 3. cxd8=B+ Kd6 4. e8=B+ Ke6 5. Lxd5+ Kf6 6. Le7+ Kg6 7. g8=B Txh2#
Who makes it better? (2023-06-07)
James Malcom: Wonderfully done. I had an illegal scheme for four I never realized, but now it is done: 1RrRq1BK/pP1P1PP1/Pk2N1N1/p3p1p1/p2PP1P1/3Q3p/6pr/6Bb
I see no improvements to yours, yet. (2023-06-07)
comment
Keywords: Dummy Pawn (x3), Golden Age (Dummy Pawn), Construction record
Genre: s#
Computer test: Popeye 4.69
FEN: 2Rn1B1K/2P1P1P1/P1k2NN1/6p1/6P1/7R/6pr/5BQb
Input: James Malcom, 2023-06-06
Last update: A.Buchanan, 2023-08-04 more...
Genre: s#
Computer test: Popeye 4.69
FEN: 2Rn1B1K/2P1P1P1/P1k2NN1/6p1/6P1/7R/6pr/5BQb
Input: James Malcom, 2023-06-06
Last update: A.Buchanan, 2023-08-04 more...
1. axb8=B+! Kb6 2. Da7+ Kxc6 3. cxd8=B+ Kd6 4. e8=B+ Ke6 5. Lxd5+ Kf6 6. Le7+ Kg6 7. g8=B Txh2#
Commented on P1410177
Commented on P1410177
SCHRECKE: Dear James, the authors should be Malcolm/Schreckenbach. (2023-07-11)
James Malcom: Done. (2023-07-12)
comment
James Malcom: Done. (2023-07-12)
comment
Keywords: Dummy Pawn (x4), Construction record
Genre: s#
Computer test: Popeye 4.69
FEN: QnRn1B1K/P1P1P1P1/k1N5/3p2p1/2PPB1P1/8/4p1pR/4Nbrr
Input: James Malcom, 2023-07-11
Last update: James Malcom, 2023-07-12 more...
Genre: s#
Computer test: Popeye 4.69
FEN: QnRn1B1K/P1P1P1P1/k1N5/3p2p1/2PPB1P1/8/4p1pR/4Nbrr
Input: James Malcom, 2023-07-11
Last update: James Malcom, 2023-07-12 more...
90 - P1410861
James Malcom
Siegfried Hornecker
Joaquim Crusats
Andrew Buchanan
12 MatPlus.net Forum 25/06/2023
(16+4)
What is curious about this position?
James Malcom
Siegfried Hornecker
Joaquim Crusats
Andrew Buchanan
12 MatPlus.net Forum 25/06/2023
(16+4)
What is curious about this position?
Fewest Black pieces requiring all 16 White pieces in a legal checkmate position
https://matplus.net/start.php?px=1689032781&app=forum&act=posts&fid=gen&tid=3043
A.Buchanan: Mu-Tsun Tsai suggests that for construction problems such as this, the stipulation might be "What is curious about this position?" (2023-07-13)
James Malcom: That feels apt. (2023-07-14)
more ...
comment
James Malcom: That feels apt. (2023-07-14)
more ...
comment
Keywords: Superseded by (P1410903)
Genre: Retro, Fairies
FEN: B1Qr2RK/3P2N1/1P4RB/1rP5/4kP2/PPP5/q2P4/2N5
Input: James Malcom, 2023-07-11
Last update: A.Buchanan, 2023-07-27 more...
Genre: Retro, Fairies
FEN: B1Qr2RK/3P2N1/1P4RB/1rP5/4kP2/PPP5/q2P4/2N5
Input: James Malcom, 2023-07-11
Last update: A.Buchanan, 2023-07-27 more...
1. Tg8! (Zugzwang)
1. ... Txg8 2. hxg8
1. ... Tf8 2. gxf8
1. ... Td8 2. cxd8
1. ... Txg8 2. hxg8
1. ... Tf8 2. gxf8
1. ... Td8 2. cxd8
SCHRECKE: Have a look at this: R4q1k/pPP3R1/rp3PKn/p5PQ/P7/8/8/8
s#2, 1. f7! - 6(!) dummy promotions (2023-07-28)
SCHRECKE: In my work a black rook on f8 is better! (2023-07-28)
A.Buchanan: Yes this is a great improvement. I can't see how one might get a 7th (2023-07-28)
more ...
comment
s#2, 1. f7! - 6(!) dummy promotions (2023-07-28)
SCHRECKE: In my work a black rook on f8 is better! (2023-07-28)
A.Buchanan: Yes this is a great improvement. I can't see how one might get a 7th (2023-07-28)
more ...
comment
Keywords: Dummy Pawn, Golden Age (Dummy Pawn), Superseded by (P1411367)
Genre: s#
Computer test: C+, popeye 4.87
FEN: 2b1r2R/1pPpk1PP/1P3pB1/4pK2/4N3/8/8/8
Input: Miguel Ambrona, 2023-07-26
Last update: A.Buchanan, 2023-07-29 more...
Genre: s#
Computer test: C+, popeye 4.87
FEN: 2b1r2R/1pPpk1PP/1P3pB1/4pK2/4N3/8/8/8
Input: Miguel Ambrona, 2023-07-26
Last update: A.Buchanan, 2023-07-29 more...
92 - P1411297
James Malcom
Andrew Buchanan
OP020 The Hopper Magazine I02 25/6/2022
(9+9)
r#6 Dummy Pawn Rule
James Malcom
Andrew Buchanan
OP020 The Hopper Magazine I02 25/6/2022
(9+9)
r#6 Dummy Pawn Rule
SCHRECKE: C+, popeye 4.87
1. Da6! droht 2. f4 h1=D,L#
1. ... h1=B! 2. bxa8=B! g4!
3. f4 droht 4. Lxd2 droht 5. Le1 fxe1D,T#
3. ... f1=B! 4. e8=B! d1=B!
5. Le1 Sc2 6. Lb1 Te3# (2023-09-09)
comment
1. Da6! droht 2. f4 h1=D,L#
1. ... h1=B! 2. bxa8=B! g4!
3. f4 droht 4. Lxd2 droht 5. Le1 fxe1D,T#
3. ... f1=B! 4. e8=B! d1=B!
5. Le1 Sc2 6. Lb1 Te3# (2023-09-09)
comment
Keywords: Dummy Pawn, Golden Age (Dummy Pawn)
Genre: r#, Fairies
FEN: n7/1P2P3/7Q/Br4p1/2kPK3/1r3PP1/B2p1p1p/n7
Input: Miguel Ambrona, 2023-07-27
Last update: James Malcom, 2023-09-09 more...
Genre: r#, Fairies
FEN: n7/1P2P3/7Q/Br4p1/2kPK3/1r3PP1/B2p1p1p/n7
Input: Miguel Ambrona, 2023-07-27
Last update: James Malcom, 2023-09-09 more...
1. b4 h5 2. b5 h4 3. b6 h3 4. b7 h2 5. b8=B Lxg7#
Keywords: Dummy Pawn, Golden Age (Dummy Pawn), Economy record (dummy pawn excelsior), Excelsior, Non-standard material (TL)
Genre: s#
Computer test: C+ Popeye v4.87
FEN: 2R1R2b/3kp1R1/7p/2P5/8/8/BP6/KB5p
Input: A.Buchanan, 2023-08-08
Last update: A.Buchanan, 2023-12-18 more...
Genre: s#
Computer test: C+ Popeye v4.87
FEN: 2R1R2b/3kp1R1/7p/2P5/8/8/BP6/KB5p
Input: A.Buchanan, 2023-08-08
Last update: A.Buchanan, 2023-12-18 more...
1. a8=D+! Kxb6 2. Da7+ Kxa7 3. Ta8+ Kb6 4. b8=D+ Txb8 5. cxb8=D+ Kc6 6. Dd6+ Kxd6 7. d8=D+ Ke5 8. e8=D+ Kf4 9. Dg5+ Kxg5 10. g8=D+ Sxg8 11. hxg8=D+ Kf4 12. f8=D+ Ke3 13. Dxf3+ Kxf3 14. Dh5+ Ke3 15. Dg3#
14. ... Kf4 15. Dgg5#
10. ... Kf4 11. f8=D+ Ke3 12. Dxf3+ Kxf3 13. Dh5+ Sg4 14. Dgxg4+ Ke3 15. Dg3#,Dhh3#
11. ... Sf5 12. Dxf5+ Ke3 13. Dxf3+ Kxf3 14. Dh5+ Ke3 15. Dg3#
14. ... Kf4 15. Dgg5#
Record of 8 white queen promotions
Improvement of P1201958
https://www.matplus.net/start.php?px=1692327608&app=forum&act=posts&fid=gen&tid=3061&pid=25076#n25076
14. ... Kf4 15. Dgg5#
10. ... Kf4 11. f8=D+ Ke3 12. Dxf3+ Kxf3 13. Dh5+ Sg4 14. Dgxg4+ Ke3 15. Dg3#,Dhh3#
11. ... Sf5 12. Dxf5+ Ke3 13. Dxf3+ Kxf3 14. Dh5+ Ke3 15. Dg3#
14. ... Kf4 15. Dgg5#
Record of 8 white queen promotions
Improvement of P1201958
https://www.matplus.net/start.php?px=1692327608&app=forum&act=posts&fid=gen&tid=3061&pid=25076#n25076
Schade um das dualistische Matt. Im strengen Sinn also kein Rekord.
SCHRECKE: sTg8 gehört nach f8! (2023-08-18)
James Malcom: Fixed. (2023-08-18)
SCHRECKE: Der wSb6 ist überflüssig!! (2023-08-18)
James Malcom: That's a surprise. (2023-08-18)
comment
SCHRECKE: sTg8 gehört nach f8! (2023-08-18)
James Malcom: Fixed. (2023-08-18)
SCHRECKE: Der wSb6 ist überflüssig!! (2023-08-18)
James Malcom: That's a surprise. (2023-08-18)
comment
Keywords: Promotion (DDDDDDDD x8), Construction record, Promotion key, konsekutive Umwandlungen 8 (DDDDDDDD), Checking key, Schlüssel = Eckzug, Phoenix, Antiphönix, Switchback (k)
Computer test: Popeye 4.87 Gustav
FEN: 1R3r2/PPPPPPPP/kN5n/1pp5/1n1bp3/2r2p2/1Kbq4/7N
Input: James Malcom, 2023-08-18
Last update: Gunter Jordan, 2023-08-18 more...
Computer test: Popeye 4.87 Gustav
FEN: 1R3r2/PPPPPPPP/kN5n/1pp5/1n1bp3/2r2p2/1Kbq4/7N
Input: James Malcom, 2023-08-18
Last update: Gunter Jordan, 2023-08-18 more...
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https://pdb.dieschwalbe.de/search.jsp?expression=COMMENTDATE%3E%3D20200919+AND+NOT+K%3D%27Hilfsr%C3%BCckz%C3%BCger%27+AND+NOT+A%3D%27Kujoth%2C+Richard+Kenneth%27+AND+A%3D%27Malcom%2C+James%27
The problems of this query have been registered by the following contributors:
A.Buchanan (14)James Malcom (75)
Marcin Banaszek (2)
Felber, Volker (1)
Miguel Ambrona (2)
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