Die Schwalbe

94 problem(s) found in 7474 milliseconds (displaying 94 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT A='Holubec, Jozef' AND A='Malcom, James'] [download as LaTeX]

1 - P1370911
James Malcom
Andrew Buchanan

(4) MatPlus.net Forum Retro/Math 21/12/2019
P1370911
(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#
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http://matplus.net/start.php?px=1609818957&app=forum&act=posts&fid=xshowr&tid=2402&pid=20379#n20379
Objective: Staugaard (Pam-Krabbé) castling as mating move.
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Keywords: Unique Proof Game, Staugaard castling, Joke, Prenix, Promotion (T), Castling as mating move, Superseded by (P1385595)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...
2 - P1374103
James Malcom
MatPlus.net Forum 26/12/2019
“A Tripley For The Holidays”
P1374103
(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#
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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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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...
3 - P1374643
James Malcom
PDB Website 14/4/2020
“Egg Five”
P1374643
(5+2)
s#1
(-:
1. hxg8=sB! g7#
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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)
comment
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...
4 - P1375286
Andrew Buchanan
James Malcom

PDB Website 30/4/2020
P1375286
(6+3)
#2
(-:
1. dxc7ep! b4 2. c8=D,T#

R: 1. ... c8-c6?! and earlier c8=sB?!
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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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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...
5 - P1375431
James Malcom
PDB Website 3/4/2020
"A Midnight Ride"
Gewidmet Gerd Wilts
P1375431
(6+5)
#3
(-:
1. cxb8=sT! Ta8 2. c7 Tb8,Lb8 3. cxb8=sT#

1. ... bxc6? 2. Dxc6#!
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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
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...
6 - P1375777
James Malcom
PDB Website 10/4/2020
nach Josef Cumpe
P1375777
(1+8)
Last two moves?
(-:
R: 1. 0-0-0# a7-a8=sT
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See P1234039
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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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...
7 - P1378636
James Malcom
Facebook 22/07/2020
P1378636
(9+5)
Promotion to king or queen, depending on location (-:
#2
1. h8=DK!
1. ... Lxc3 2. DKxf6xd4xb2#
1. ... Lc5, L~ 2. Lxe5#
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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: ku = 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...
8 - P1379376
James Malcom
(30) MatPlus.net Forum 26/8/2020
P1379376
(13+13) C+
BP in 11.0
(-:
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
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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)
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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...
9 - P1380125
James Malcom
(1) MatPlus.net Forum 29/8/2019
P1380125
(8+6) C+
s#6
1. Sd3+! Kc2 2. Tc5+ Kxd3 3. Dd6+ Ke4 4. Sc3+ bxc3 5. De5+ Kd3 6. 0-0-0+ Td2#
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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...
10 - P1380126
James Malcom
(10) MatPlus.net Forum 31/8/2019
P1380126
(7+4) C+
s#3
1. Lc2+! Kxc2 2. Dd3+ Kxd3 3. 0-0-0+ Sd2#
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http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshows&tid=2343
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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...
11 - P1380128
James Malcom
(34) MatPlus.net Forum 18/9/2019
P1380128
(12+7) C+
#5
1. Sbc3!+ Kc2 2. cxd8=S b5 3. cxb6ep Txe6+ 4. Sxe6 Kd3 5. 0-0-0#
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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)
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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...
12 - P1380136
James Malcom
(3) MatPlus.net Forum 20/9/2019
P1380136
(9+4) C+
#3
1. Sg4! Kc2 2. Se5 Kc1 3. Sa3#
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http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=gen&tid=2356
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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...
13 - P1380144
James Malcom
Zalmen Kornin

chessproblem.net 10/8/2019
P1380144
(12+9) C+
#5
1. Sc3+! Kc2 2. h8=L! e5 3. fxe6ep cxd4 4. Lxd4 Kd3 5. 0-0-0#
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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!"
James Malcom: The first Valladao-Belen with a bishop promotion. (2020-09-22)
comment
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...
14 - P1380148
James Malcom
Peter Hoffmann

H48d Der Reiz des Ungewöhnlichen 9/2020
JM nach PH
P1380148
(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!
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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
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...
15 - P1380158
James Malcom
chessproblem.net 14/10/2019
P1380158
(7+8) C+
#3
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#
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https://www.chessproblem.net/viewtopic.php?f=7&t=60&p=2362
Henrik Juel: C+ Popeye 4.61, except for the mate dual after 2... Kxa3 (2020-09-22)
comment
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...
16 - P1380160
James Malcom
chessproblem.net 14/10/2019
nach György Paros
P1380160
(5+6) C+
h#3
1. Lc7+! Kxc7 2. Da6 Kd6 3. 0-0-0+ Sd7#
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See P0533854

https://www.chessproblem.net/viewtopic.php?f=7&t=60&p=2362
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comment
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...
17 - P1380320
James Malcom
www.chess.com 9/7/2020
P1380320
(9+9)
#5
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#
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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)
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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...
18 - P1380353
James Malcom
Guus Rol

www.chess.com 15/7/2020
P1380353
(11+11) C+
#4
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#
play all play one stop play next play all
https://www.chess.com/forum/view/more-puzzles/a-challenging-mate-in-5-can-you-find-the-first-move?page=3
Henrik Juel: C+ Popeye 4.61 (except for a mate dual) (2020-09-27)
more ...
comment
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...
19 - P1380368
James Malcom
MatPlus.net Forum 22/9/2020
Gewidmet Zalmen Kornin & Peter Hoffmann
P1380368
(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#
play all play one stop play next play all
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."
more ...
comment
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...
20 - P1380439
James Malcom
MatPlus.net Forum 23/09/2020
P1380439
(13+1) C+
#4
1. ... Kxc2 2. Sd2! Kxd3 3. Sc4 Kc2 4. Se3+ Kd3 5. Td1#
play all play one stop play next play all
See also P1380440
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
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...
21 - P1380440
James Malcom
Andrew Buchanan

MatPlus.net Forum 23/09/2020
P1380440
(10+1) C+
#4
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
play all play one stop play next play all
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
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...
22 - P1380454
James Malcom
www.chess.com 19/8/2019
P1380454
(7+10) C+
h#3
1. Ka4 0-0 2. Lh1 Le1 3. g2 Tf4#
play all play one stop play next play all
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
Keywords: Cheney-Loyd, Castling
Genre: h#
Computer test: Popeye 4.61
FEN: 8/N7/2p5/k4p2/4b1p1/p3p1pp/P1p1PB1P/4K2R
Input: James Malcom, 2020-09-30
Last update: James Malcom, 2020-09-30 more...
23 - P1380551
James Malcom
MatPlus.net Forum 19/2/2020
"The King's Dilemma"
P1380551
(7+8)
Gewinn
1. 0-0-0xd1+! g1=D 2. Txg1+ Kxg1 3. a6 f2 4. Ld4 Lb8 5. b5
play all play one stop play next play all
http://matplus.net/start.php?px=1601649783&app=forum&act=posts&fid=xshowe&tid=2441
James Malcom: P1380523 is the only predecessor I know with the idea of castling with capture. (2020-10-02)
comment
Keywords: Joke, Castling key
Genre: Studies
FEN: 8/7B/8/P7/1Pp5/3p1p1n/1B1P2pb/R2nK2k
Input: James Malcom, 2020-10-02
Last update: James Malcom, 2021-08-04 more...
24 - P1380852
James Malcom
Andrew Buchanan

MatPlus.net Forum 12/10/2020
after Josef Cumpe
P1380852
(1+7)
Last two moves?
(-:
R: 1. 0-0-0+ a7-a8=sT
play all play one stop play next play all
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)
comment
Keywords: Last Moves?, Joke promotion (t), Rex solus, Type C, Castling in the retro play, Joke, Promotion in the retro play (t), Castling (sg)
Genre: Retro
FEN: 2kr2K1/1p1p1npr/8/8/8/8/8/8
Input: A.Buchanan, 2020-10-12
Last update: A.Buchanan, 2023-08-15 more...
25 - P1380855
James Malcom
MatPlus.net Forum 12/10/2020
P1380855
(14+14) C+
BP in 12.0
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
play all play one stop play next play all
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)
comment
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...
26 - P1380882
James Malcom
Andrew Buchanan

PDB Website 14/10/2020
after Josef Cumpe
P1380882
(2+7)
Last two moves?
(-:
R: 1. ... 0-0-0+ 2. a7-a8=sT
play all play one stop play next play all
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 ...
comment
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...
27 - P1381063
James Malcom
F204 SuperProblem (Website) 20/04/2020
P1381063
(8+5)
s#15
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#
play all play one stop play next play all
Cook: Dual (Zugumstellung)
14. Th7 Ke8 15. Lc7 Lxe7#
more ...
comment

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...
28 - P1381069
James Malcom
SuperProblem (Website) 21/04/2020
P1381069
(3+6) C+
h#3
1. Kg4 Lf1 2. Kf3 Ke1 3. g4 Sg1#
play all play one stop play next play all
http://superproblem.ru/archive/probl/H3/Malcom-h3-2020.gif
more ...
comment

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...
29 - P1381070
James Malcom
SuperProblem (Website) 09/04/2020
P1381070
(10+5) C+
s#8
1. Ta1+! Kg2 2. Tb2+ Kf3 3. Ta3+ Ke4 4. Tb4+ Kd5 5. Ta5+ Kc6 6. Tc4+ Kb7 7. Tc7+ Kxa8 8. Ke7+ Dxf8#
play all play one stop play next play all
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)
more ...
comment
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...
30 - P1381266
James Malcom
(2) MatPlus.net Forum 27/9/2019
P1381266
(6+7) C+
#7
1. Kc1! d6 2. h8=S! gxh6 3. Sg6 h5 4. Sf4 h4 5. Sxd3 h3 6. Se1 h2 7. Sc2#
play all play one stop play next play all
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 ...
comment
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...
31 - P1381267
James Malcom
(1) Mat Plus 21/10/2020
P1381267
(9+13)
#12
(-:
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#
play all play one stop play next play all
more ...
comment
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...
32 - P1381270
James Malcom
SuperProblem (Website) 24/10/2020
P1381270
(11+10)
#6
1. b4+! e5 2. dxe6ep Kg6 3. c4+ f5 4. Lxf5+ Kh6 5. d4+ g5 6. Lxg5#
play all play one stop play next play all
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)
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...
33 - P1381285
Andrew Buchanan
James Malcom

MatPlus.net Forum 25/10/2020
P1381285
(5+7) C+
#3
Bosma
1. Tf5+! Sxf5+ 2. Se4+! Sxe4 3. De6#
play all play one stop play next play all
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)
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...
34 - P1381287
James Malcom
SuperProblem (Website) 25/10/2020
P1381287
(5+6) C+
h#3.5
1. ... c4 2. Se4 h4 3. g5 hxg5 4. f5 d4#
play all play one stop play next play all
Record of 3+2 pawn double-steps by White and Black

http://superproblem.ru/archive/probl/Hn/Malkom-h35-2020.gif
more ...
comment
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...
35 - P1381288
James Malcom
SuperProblem (Website) 25/10/2020
P1381288
(7+11) C+
s#8
1. Ta5+! b5 2. Txb5+ c5 3. Txc5+ d5 4. Txd5+ e5 5. Txe5 f5 6. Txf5+ g5 7. Tgxg5+ hxg5 8. g4+ Dxg4#
play all play one stop play next play all
Record of 1+6 pawn double-steps by White and Black

http://superproblem.ru/archive/probl/Sn/Malcom-s8-2020-1.gif
more ...
comment
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...
36 - P1381345
James Malcom
(36) MatPlus.net Forum 14/10/2020
P1381345
(13+11) C+
BP in 9.5
(-:
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
play all play one stop play next play all
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)
more ...
comment
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...
37 - P1381497
James Malcom
chess.stackexchange.com 15/6/2020
P1381497
(3+4) C+
#1
Bosma
1. 0-0#!
play all play one stop play next play all
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)
more ...
comment
Keywords: Joke, Bosma, Miniature, Castling as mating move
Genre: n#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 8/8/8/8/8/7n/5Rrp/2k1K2R
Input: James Malcom, 2020-11-03
Last update: A.Buchanan, 2024-02-01 more...
38 - P1381499
James Malcom
chess.stackexchange.com 12/8/2020
P1381499
(6+5) C+
#2
Bosma
1. 0-0+!
1. ... Shxf1 2. Dg4#
1. ... Sgxf1 2. Df2#
1. ... Lxf1 2. Tf2#
play all play one stop play next play all
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)
comment
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...
39 - P1381500
James Malcom
English Chess Forum (Website) 13/6/2020
P1381500
(3+4) C+
#1
Bosma
1. Kc2#!
play all play one stop play next play all
https://www.ecforum.org.uk/viewtopic.php?p=246809#p246809

Reprint: https://chess.stackexchange.com/a/29992/15543
James Malcom: The wSe1 prevents the orthodox cook of 1. ... Kxc2. (2020-11-14)
comment
Keywords: Joke, Bosma, Miniature
Genre: n#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 8/8/8/8/8/3p4/3rp3/RK1kN3
Reprints: chess.stackexchange.com 13/6/2020
Input: James Malcom, 2020-11-03
Last update: A.Buchanan, 2024-02-01 more...
40 - P1381502
James Malcom
chess.stackexchange.com 13/6/2020
P1381502
(6+1) C+
#1
Bosma
1. Se5#!
play all play one stop play next play all
A.Buchanan: Trivial verification, perhaps, but at least it confirms that WinChloe's understanding of the condition resembles James'. (2020-11-13)
comment
Keywords: Joke, Bosma, Miniature, Flight taking, Rex solus (s)
Genre: n#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 8/7B/3B2NK/8/5k2/6P1/5Q2/8
Input: James Malcom, 2020-11-03
Last update: A.Buchanan, 2024-02-01 more...
41 - P1381529
James Malcom
SuperProblem (Website) 05/11/2020
P1381529
(11+14)
#22
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#
play all play one stop play next play all
The longest problem with both sides castling

http://superproblem.ru/archive/probl/N/Malcom-22x-2020.gif
more ...
comment
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...
42 - P1381788
James Malcom
Facebook 7/27/2020
P1381788
(10+6) C+
#2
1. g8=D! droht 2. Df7#
1. ... Tf5 2. Dd8#
1. ... Le8 2. Dxe8#
1. ... Sh8 2. Df8#
play all play one stop play next play all
more ...
comment
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...
43 - P1381790
James Malcom
Facebook 24/09/2020
P1381790
(7+5) C+
#3
1. h8=D+! e5 2. dxe6ep+ Kxd3 3. 0-0-0#
2. ... Kxb4 3. Db2#
play all play one stop play next play all
more ...
comment
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...
44 - P1381791
James Malcom
Facebook 26/09/2020
P1381791
(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
play all play one stop play next play all
more ...
comment
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...
45 - P1381916
James Malcom
PDB Website 14/11/2020
P1381916
(13+9)
s#11
(-:
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#
play all play one stop play next play all
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
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...
46 - P1381962
James Malcom
www.chess.com 15/11/2020
"X Marks The Spot"
P1381962
(11+11) C+
#2
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#
play all play one stop play next play all
https://www.chess.com/forum/view/more-puzzles/x-marks-the-spot-mate-in-2?page=1
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comment
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...
47 - P1382303
James Malcom
Jacques Rotenberg

(10) MatPlus.net Forum 22/11/2020
P1382303
(8+5) C+
#2
1. Tb2+? Ka3!

1. Lf3! ... 2. Ld1#
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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
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...
48 - P1382410
James Malcom
SuperProblem (Website) 25/11/2020
nach Grigory Popov
P1382410
(11+7) C+
#8
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#
play all play one stop play next play all
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
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...
49 - P1382735
James Malcom
MatPlus.net Forum 13/3/2020
P1382735
(5+4) C+
s#5
1. g4! Ka2 2. g5 Ka1 3. g6 Ka2 4. g7 Ka1 5. g8=L, Se2#,Sf3#,Sh3#
play all play one stop play next play all
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-12-04)
comment
Keywords: Excelsior
Genre: s#
FEN: 8/8/8/8/8/8/1PPP2Pp/k1K3nr
Input: James Malcom, 2020-12-04
Last update: Marcin Banaszek, 2020-12-09 more...
50 - P1382737
James Malcom
MatPlus.net Forum 13/3/2020
P1382737
(3+5) C+
s#5
1. a4! Ka1 2. a5 Kb1 3. a6 Ka1 4. a7 Kb1 5. a8=T Se2#,Sf3#,Sh3#
play all play one stop play next play all
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-12-04)
comment
Keywords: Excelsior
Genre: s#
FEN: 8/8/8/8/8/3p4/P2R3p/1k1K2nr
Reprints: Mat Plus 13/3/2020
Input: James Malcom, 2020-12-04
Last update: Marcin Banaszek, 2020-12-09 more...
51 - P1382738
James Malcom
MatPlus.net Forum 13/3/2020
P1382738
(5+2) C+
s#6
1. g4! Kc2 2. g5 Kc1 3. g6 Kc2 4. g7 Kc1 5. g8=D Kc2 6. Dg5 axb2#
play all play one stop play next play all
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-12-04)
comment
Keywords: Excelsior
Genre: s#
FEN: 8/8/8/8/8/p7/PN4P1/K1k1B3
Input: James Malcom, 2020-12-04
Last update: Marcin Banaszek, 2020-12-09 more...
52 - P1382740
James Malcom
MatPlus.net Forum 13/3/2020
P1382740
(5+7) C+
s#5
1. a4! Kh1 2. a5 Kh2 3. a6 Kh1 4. a7 h2 5. a8=S Se8#,Sh5#
4. ... Kh2 5. a8=L Se8#,Sh5#
play all play one stop play next play all
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
Henrik Juel: C+ Popeye 4.61 (2020-12-04)
comment
Keywords: Excelsior
Genre: s#
FEN: 7b/3p2n1/3Pp3/4Kp2/5N2/7p/P3N2k/8
Input: James Malcom, 2020-12-04
Last update: Marcin Banaszek, 2020-12-09 more...
53 - P1382970
James Malcom
MatPlus.net Forum 3/3/2019
P1382970
(15+2)
#1 with double check

14 double check mates

http://matplus.net/start.php?px=1607750786&app=forum&act=posts&fid=gen&tid=2281
HBae: 14 Züge wurden schon 1976 dargestellt, siehe P1178762 (2020-12-13)
comment

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...
54 - P1383077
James Malcom
Mat Plus 24/05/2019
P1383077
(4+16) C+
#2
1. 0-0-0+! Sf1 2. Txf1#
play all play one stop play next play all
http://matplus.net/start.php?px=1608213940&app=forum&act=posts&fid=xshow2&tid=2297

Both rook squares are maximally attacked
Henrik Juel: C+ Popeye 4.61 (2020-12-17)
comment
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...
55 - P1383099
James Malcom
Mat Plus 08/08/2020
P1383099
(7+5) C+
#2
1. hxg8=D! droht 2. Da8#
1. ... e5+ 2. fxe6ep#
1. ... g5 2. fxg6ep#
play all play one stop play next play all
http://matplus.net/start.php?px=1608305486&app=forum&act=posts&fid=xshow3&tid=2525
more ...
comment
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...
56 - P1383329
James Malcom
SuperProblem (Website) 24/12/2020
P1383329
(6+7) C+
h#4.5
1. ... c4! (Kb3?) 2. Th4 g4 3. Th7 h4 4. Dh6 f4 5. Lf7 f5#
play all play one stop play next play all
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

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...
57 - P1384294
James Malcom
MatPlus.net Forum 27/12/2020
nach Bosko Miloseski
P1384294
(11+12)
#51
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!
play all play one stop play next play all
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
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...
58 - P1384833
James Malcom
1 ChessBase India 25/12/2020
P1384833
(11+8) cooked
s#16
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#
play all play one stop play next play all
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

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
P1384834
(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
play all play one stop play next play all
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)
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comment
Keywords: Castling, Sea Snake
Genre: Fairies
FEN: 5b1k/2p1pBp1/1pP1P1Pp/pP2p3/8/7p/4N2P/Rn2K3
Input: A.Buchanan, 2021-01-01
Last update: James Malcom, 2022-06-12 more...
60 - P1384934
James Malcom
PDB Website 04/01/2020
P1384934
(5+8) C+
h#2
1. b1=B! Lxa3 2. c1=B! Dxc3#
play all play one stop play next play all
more ...
comment
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...
61 - P1385355
James Malcom
puzzling.stackexchange.com 28/06/2019
"The Slaughterhouse"
P1385355
(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#
play all play one stop play next play all
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
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...
62 - P1385390
James Malcom
ChessBase India 02/01/202
P1385390
(11+11)
White rochade in 85
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
play all play one stop play next play all
https://chessbase.in/news/Solutions-to-Christmastide-Problems-top-solvers-and-more?fbclid=IwAR23oroTmkRpvTzFARLw3CG03etxtCMVvu9iGPGng4cN8vzwosGA8dsHdbs
James Malcom: See the longer P1385386 and the earlier P1384834, of which this is an extension. (2021-01-15)
comment
Keywords: Castling, Sea Snake
Genre: Fairies
FEN: 5b1k/2p1pBp1/1pPpP1Pp/pP1PP3/8/7p/4N2P/Rn2K3
Input: James Malcom, 2021-01-15
Last update: James Malcom, 2022-06-12 more...
63 - P1385595
Andrew Buchanan
James Malcom
Hauke Reddmann
Michel Caillaud

MatPlus.net Forum 06/01/2021
in memory of Conrad Staugaard
P1385595
(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#
play all play one stop play next play all
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
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...
64 - P1386064
James Malcom
SuperProblem (Website) 15/01/2020
P1386064
(8+11) C+
#12
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#
play all play one stop play next play all
My first queening record

Record of 2+5 queen promotions

http://superproblem.ru/archive/probl/N/Malcom-12x-2020.gif
more ...
comment
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...
65 - P1387686
James Malcom
chessproblem.net 16/10/2019
P1387686
(15+4) C+
ser-h-Rochade in 34
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
play all play one stop play next play all
https://www.chessproblem.net/viewtopic.php?t=1079
more ...
comment
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...
66 - P1387688
James Malcom
chessproblem.net 16/10/2019
P1387688
(11+10) C+
h-Rochade in 14
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
play all play one stop play next play all
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
Keywords: Castling (wg)
Genre: Fairies
Computer test: Jacobi v0.7.5
FEN: 8/8/p1p1p3/1bP1P2p/p1p4P/PkPp1p2/3P1P2/RNB1K3
Input: James Malcom, 2021-03-21
Last update: A.Buchanan, 2022-06-13 more...
67 - P1388091
Andrew Buchanan
James Malcom

PS3645 The Problemist Supplement 171, p. 139, 03/2021
P1388091
(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#
play all play one stop play next play all
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
Keywords: Promotion (S)
Genre: n#
Computer test: C+ Popeye 4.61
FEN: 8/3p4/3p3P/3p4/1p1p4/1P1p4/p1PP4/kbK5
Reprints: Facebook 02/04/2021
Input: A.Buchanan, 2021-04-03
Last update: Felber, Volker, 2021-12-16 more...
68 - P1388367
James Malcom
PS3638 The Problemist Supplement 171, p. 138, 03/2021
P1388367
(9+10) C+
#2
1. Sf6! droht 2. Sd7#
1. ... Tbd3 2. Tb5#
1. ... Ted3 2. Txe2#
1. ... Lc6 2. Txe3#
1. ... Sxf6 2. Tg5#
play all play one stop play next play all
Henrik Juel: Nice control of the white batteries
more ...
comment

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...
69 - P1388686
James Malcom
Facebook 17/04/2021
P1388686
(15+14) C+
a) KBP in 7.5
b) KBP in 8.0
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
play all play one stop play next play all
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
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...
70 - P1390107
James Malcom
Facebook 18/03/2021
P1390107
(15+14) C+
BP in 12.5
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
play all play one stop play next play all
more ...
comment
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...
71 - P1391856
James Malcom
548 OzProblems.com 22/5/2021
P1391856
(4+9) C+
#8
Two Solutions
2.1...
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#
play all play one stop play next play all
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
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...
72 - P1393307
James Malcom
1627 Julias Fairies 22/06/2021
P1393307
(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+
play all play one stop play next play all
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
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...
73 - P1393313
Michel Caillaud
James Malcom

1639 Julias Fairies 07/30/2021
P1393313
(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
play all play one stop play next play all
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
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...
74 - P1394281
James Malcom
561 OzProblems.com 21/08/2021
P1394281
(10+10) C+
#8
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#
play all play one stop play next play all
more ...
comment
Keywords: Castling, Castling key, Indian (TL), Bristol (KT)
Computer test: Gustav 4.2a, Brute Force
FEN: 8/5p2/p7/5Pp1/p1p1B3/P1P1p3/PBP1P1pp/R3K1bk
Input: James Malcom, 2021-10-03
Last update: James Malcom, 2022-06-11 more...
75 - P1396159
Tivadar Kardos
James Malcom
Andrew Buchanan

PDB Website 24/11/2021
TK, correction JM & AB
P1396159
(6+15) C+
h#3
1. dxe3ep+ Kxc4 2. Lc3 Sxc2 3. Ta5 axb3#
R: 1. e2-e4 Tf3-d3+ 2. Ke4-d5
play all play one stop play next play all
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
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...
76 - P1397490
James Malcom
H48k Der Reiz des Ungewöhnlichen 01/2021
P1397490
(12+10)
#5
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#
play all play one stop play next play all
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
Henrik Juel: C+ Popeye 4.61 (2021-12-26)
comment
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...
77 - P1397491
James Malcom
H48l Der Reiz des Ungewöhnlichen 1/2021
P1397491
(13+9)
#5
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#
play all play one stop play next play all
"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
Henrik Juel: C+ Popeye 4.61, except for the mate dual after 3... Tc8 (2021-12-26)
comment
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...
78 - P1398474
James Malcom
PDB Website 16/1/2022
P1398474
(5+3) C+
h#2
1. g1=B Lf3 2. f1=B Td2#
play all play one stop play next play all
Better economy than P1384934
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
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...
79 - P1398666
James Malcom
Michael Schreckenbach
Andrew Buchanan

PDB Website 26/01/2022
P1398666
(4+3) C+
h#2 (-:
1. g1=B Lf3 2. e1=B Te2#
play all play one stop play next play all
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 ...
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...
80 - P1399232
James Malcom
www.chess.com 11/10/2019
P1399232
(5+5) C+
h#7
3.1
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#
play all play one stop play next play all
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 ...
comment
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...
81 - P1400191
James Malcom
Andrew Buchanan

PDB Website 02/04/2022
P1400191
(8+7) C+
r#4
1. bxa8=B! f1=B 2. e8=B d1=B 3. Le1 Sc2 4. Lb1 Te3#
play all play one stop play next play all
More economical version of P1375039
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 ...
comment
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...
82 - P1401781
James Malcom
596 OzProblems.com 23/04/2022
P1401781
(5+10) C+
#8
Three Solutions
3.1...
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#
play all play one stop play next play all
Improvement upon P1391856
Henrik Juel: C+ Popeye 4.61 (2022-06-11)
Henrik Juel: Hint
1.f8=DLS (2022-06-11)
comment
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...
83 - P1402132
James Malcom
C11946 The Problemist 28-5, p. 189, 09/2021
nach Otto Blathy
P1402132
(8+16)
#47
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#
play all play one stop play next play all
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
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...
84 - P1402237
James Malcom
Jacques Rotenberg

Problemiste 2012
JR Version JM
SuperProblem.net 01/06/2022
P1402237
(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#
play all play one stop play next play all
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
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...
85 - P1402344
James Malcom
Facebook 17/06/2022
gewidmet Andrew Buchanan
P1402344
(11+9)
#5
1. Sxf5! droht 2. Le3#
1. ... Lc3+ 2. Ka4 Ta6+ 3. bxa6 Te2,Txd3 4. g3+ Sxg3 5. Lxg3#
play all play one stop play next play all
A birthday gift
SCHRECKE: C+, Gustav 4.2a, Brute Force (2022-06-30)
comment
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...
86 - P1405012
James Malcom
FIDE World Cup 10th 10/2022
Spezielle ehrende Erwähnung
P1405012
(12+12)
#16
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 ...
play all play one stop play next play all
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
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...
87 - P1410110
James Malcom
F311 SuperProblem (Website) 28/05/2022
P1410110
(9+14) C+
s#15
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#
play all play one stop play next play all
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
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...
88 - P1410177
James Malcom
PDB Website 6/6/2023
P1410177
(13+6)
s#5
(-:
1. cxd8=B+ Kd6 2. e8=B+ Ke6 3. Lc4+ Kxf6 4. Le7+ Kxg6 5. g8=B Txh3#
play all play one stop play next play all
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
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...
89 - P1410859
Michael Schreckenbach
James Malcom

PDB Website 07/06/2023
P1410859
(15+10)
s#7
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#
play all play one stop play next play all
Commented on P1410177
SCHRECKE: Dear James, the authors should be Malcolm/Schreckenbach. (2023-07-11)
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...
90 - P1410861
James Malcom
Siegfried Hornecker
Joaquim Crusats
Andrew Buchanan

12 MatPlus.net Forum 25/06/2023
P1410861
(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
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...
91 - P1411257
James Malcom
Andrew Buchanan

OP029 The Hopper Magazine I03 30/12/2022
P1411257
(8+7) C+
S#2 (-:
1. Tg8! (Zugzwang)
1. ... Txg8 2. hxg8
1. ... Tf8 2. gxf8
1. ... Td8 2. cxd8
play all play one stop play next play all
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
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...
92 - P1411297
James Malcom
Andrew Buchanan

OP020 The Hopper Magazine I02 25/6/2022
P1411297
(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
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...
93 - P1411660
Andrew Buchanan
Retudin
James Malcom

puzzling.stackexchange.com 01/08/2023
P1411660
(8+5) C+
s#5
1. b4 h5 2. b5 h4 3. b6 h3 4. b7 h2 5. b8=B Lxg7#
play all play one stop play next play all
more ...
comment
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...
94 - P1411845
James Malcom
MatPlus.net Forum 15/08/2023
After David Zimbeck
P1411845
(12+12)
#15
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#
play all play one stop play next play all
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
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...
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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%27Holubec%2C+Jozef%27+AND+A%3D%27Malcom%2C+James%27

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A.Buchanan (14)
James Malcom (75)
Marcin Banaszek (2)
Felber, Volker (1)
Miguel Ambrona (2)