62 problem(s) found in 4464 milliseconds (displaying 62 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND CPLUS AND A='Malcom, James'] [download as LaTeX]
1 - P1374103
James Malcom
MatPlus.net Forum 26/12/2019
“A Tripley For The Holidays”
(7+12) C+
h#3
(-:
3.1
James Malcom
MatPlus.net Forum 26/12/2019
“A Tripley For The Holidays”
(7+12) C+
h#3
(-:
3.1
1) 1. Se7 Lxh4 2. 0-0 Lxf6 3. Tf7 Th8#
2) 1. La7 b6 2. 0-0-0 bxa7 3. Td7 a8=D#
3) 1. e1=T Lf1 2. 0-0-0-0-0-0! Lxd3 3. Kd5 Lc4#
All three castlings in a helpmate on the same move. Compare to P1227518.
http://matplus.net/start.php?px=1609949816&app=forum&act=posts&fid=gen&tid=2409
2) 1. La7 b6 2. 0-0-0 bxa7 3. Td7 a8=D#
3) 1. e1=T Lf1 2. 0-0-0-0-0-0! Lxd3 3. Kd5 Lc4#
All three castlings in a helpmate on the same move. Compare to P1227518.
http://matplus.net/start.php?px=1609949816&app=forum&act=posts&fid=gen&tid=2409
Keywords: Joke, Staugaard castling, Castling, Promotion in the mating move (D), under-promotion key (T), Castling as mating move
Genre: h#, Fairies
Computer test: Henrik Juel: Solutions 1 and 2 are C+ by Popeye 4.61 C+ WinChloe Rokagogo: no real P-M duals and no fake Rokagogo duals
FEN: rb2k1nr/2p5/3p1p2/1P3p2/5P1p/1K1p1P1R/4pBB1/8
Input: James Malcom, 2020-04-02
Last update: A.Buchanan, 2024-01-18 more...
Genre: h#, Fairies
Computer test: Henrik Juel: Solutions 1 and 2 are C+ by Popeye 4.61 C+ WinChloe Rokagogo: no real P-M duals and no fake Rokagogo duals
FEN: rb2k1nr/2p5/3p1p2/1P3p2/5P1p/1K1p1P1R/4pBB1/8
Input: James Malcom, 2020-04-02
Last update: A.Buchanan, 2024-01-18 more...
1. f4 b5 2. f5 b4 3. f6 b3 4. fxe7 bxc2 5. exf8=B cxb1=L 6. Da4 Ke7 7. Dh4+ Ke6 8. g4 Se7 9. Lg2 Txf8 10. Lb7 Sc6 11. Lxc8 Tb8
Henrik Juel: What is the joke, James?
Natch 3.1 found no solution (2020-08-26)
James Malcom: The solution has now been added in, Henrik.
This PG has two purposes.
1) It is another exploration of what themes be realized with the dummy pawn involves.
2) It is also to push the boundaries of how long a dummy pawn PG can be made. (2020-08-27)
Henrik Juel: Thanks, James
Apparently you also extended the proof game; the one I tested was in 10.5
The solution shows the Schnoebelen theme, by the way (2020-08-27)
Henrik Juel: You forgot to remove wPf2 from the diagram position (2020-08-27)
James Malcom: Removed, and yes I did manage to find a way to extend it by a ply, in theme for its purpose. The version is also C+. (2020-08-27)
A.Buchanan: I think sLb1 is kind of anti-Belfort Any way to replace it with a Phoenix/Prenix knight? (2020-08-27)
Henrik Juel: Strictly speaking, this is not Belfort, which requires two units to stand away
As Andrew suggests, if sLb1 were a black knight, we would have Belfort (2020-08-27)
A.Buchanan: It's limiting to just talk about Belfort Theme - one historical tourney which had a fiddly constraint about the number of pieces exhibiting the property. Want really to talk more generally about Belfort *Effect*, which is a property of a single unit (2022-01-26)
comment
Natch 3.1 found no solution (2020-08-26)
James Malcom: The solution has now been added in, Henrik.
This PG has two purposes.
1) It is another exploration of what themes be realized with the dummy pawn involves.
2) It is also to push the boundaries of how long a dummy pawn PG can be made. (2020-08-27)
Henrik Juel: Thanks, James
Apparently you also extended the proof game; the one I tested was in 10.5
The solution shows the Schnoebelen theme, by the way (2020-08-27)
Henrik Juel: You forgot to remove wPf2 from the diagram position (2020-08-27)
James Malcom: Removed, and yes I did manage to find a way to extend it by a ply, in theme for its purpose. The version is also C+. (2020-08-27)
A.Buchanan: I think sLb1 is kind of anti-Belfort Any way to replace it with a Phoenix/Prenix knight? (2020-08-27)
Henrik Juel: Strictly speaking, this is not Belfort, which requires two units to stand away
As Andrew suggests, if sLb1 were a black knight, we would have Belfort (2020-08-27)
A.Buchanan: It's limiting to just talk about Belfort Theme - one historical tourney which had a fiddly constraint about the number of pieces exhibiting the property. Want really to talk more generally about Belfort *Effect*, which is a property of a single unit (2022-01-26)
comment
Keywords: Belfort (L), Dummy Pawn, Schnoebelen Theme, Golden Age (Dummy Pawn), Ceriani-Frolkin Theme (B), Prentos Theme (B), Unique Proof Game, Non-standard material (l)
Genre: Retro
Computer test: Jacobi v.0.7.5
FEN: 1rBq1r2/p1ppnppp/2n1k3/8/6PQ/8/PP1PP2P/RbB1K1NR
Input: James Malcom, 2020-08-26
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro
Computer test: Jacobi v.0.7.5
FEN: 1rBq1r2/p1ppnppp/2n1k3/8/6PQ/8/PP1PP2P/RbB1K1NR
Input: James Malcom, 2020-08-26
Last update: A.Buchanan, 2023-08-04 more...
1. Sd3+! Kc2 2. Tc5+ Kxd3 3. Dd6+ Ke4 4. Sc3+ bxc3 5. De5+ Kd3 6. 0-0-0+ Td2#
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshows&tid=2343
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshows&tid=2343
James Malcom: As far as I know, this is the first presentation in a selfmate. Of course it can be argued that a Belen only constitutes White castling with mate, but as far as I see it as long as the BK's journey is done and the last move is White's castling, it is a Belen. haven't seen any opposition to this as I have seen. (2020-09-21)
more ...
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more ...
comment
Keywords: Belen Theme, Checking key, Castling
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/8/1Q6/1R6/1p3N2/bp6/br3PP1/RNk1K3
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/8/1Q6/1R6/1p3N2/bp6/br3PP1/RNk1K3
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
1. Lc2+! Kxc2 2. Dd3+ Kxd3 3. 0-0-0+ Sd2#
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshows&tid=2343
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshows&tid=2343
Keywords: Belen Theme, Checking key, Castling
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/8/3QR3/2r5/1pn5/B7/1P6/RBk1K3
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/8/3QR3/2r5/1pn5/B7/1P6/RBk1K3
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
1. Sbc3!+ Kc2 2. cxd8=S b5 3. cxb6ep Txe6+ 4. Sxe6 Kd3 5. 0-0-0#
http://matplus.net/start.php?px=1600656376&app=forum&act=posts&tid=2343&fid=xshows&page=1
http://www.berlinthema.de/Auswahl_PH.pdf-"Wenn man eine Unterverwandlung haben will, ist die Springerumwandlung in der Regel am einfachsten zu erzeugen, wegen der unterschiedlichen Gangart des Springers. Die (H48b) mag als Erstdarstellung ihre Berechtigung haben, doch daß Schwarz statt b7-b5 auch b7-b6 spielen kann, entwertet m.E. den e.p.-Schlag weitgehend. Zudem wirkt angesichts des ungedeckten Satzschachs das erste Zugpaar künstlich aufgesetzt."
http://matplus.net/start.php?px=1600656376&app=forum&act=posts&tid=2343&fid=xshows&page=1
http://www.berlinthema.de/Auswahl_PH.pdf-"Wenn man eine Unterverwandlung haben will, ist die Springerumwandlung in der Regel am einfachsten zu erzeugen, wegen der unterschiedlichen Gangart des Springers. Die (H48b) mag als Erstdarstellung ihre Berechtigung haben, doch daß Schwarz statt b7-b5 auch b7-b6 spielen kann, entwertet m.E. den e.p.-Schlag weitgehend. Zudem wirkt angesichts des ungedeckten Satzschachs das erste Zugpaar künstlich aufgesetzt."
James Malcom: This is the first Valladao-Belen with an underpromotion. However, it is damaged by the common "short" ep and a dualistic move order. (2020-09-21)
comment
comment
Keywords: Belen Theme, Valladao Task, Checking key, under-promotion (S), En passant, Castling as mating move
Genre: n#
FEN: 3b4/1pPPr1p1/4P1P1/p1P5/N1p5/P7/P4P2/RNk1K3
Reprints: H48b Der Reiz des Ungewöhnlichen
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
Genre: n#
FEN: 3b4/1pPPr1p1/4P1P1/p1P5/N1p5/P7/P4P2/RNk1K3
Reprints: H48b Der Reiz des Ungewöhnlichen
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
1. Sg4! Kc2 2. Se5 Kc1 3. Sa3#
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=gen&tid=2356
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=gen&tid=2356
Keywords: Belen Theme (Anti-)
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/8/8/8/1p1Bp3/1P1kPp2/P4P1N/RN2K3
Input: James Malcom, 2020-09-21
Last update: James Malcom, 2020-09-21 more...
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/8/8/8/1p1Bp3/1P1kPp2/P4P1N/RN2K3
Input: James Malcom, 2020-09-21
Last update: James Malcom, 2020-09-21 more...
1. Sc3+! Kc2 2. h8=L! e5 3. fxe6ep cxd4 4. Lxd4 Kd3 5. 0-0-0#
https://www.chessproblem.net/viewtopic.php?f=7&t=1078&p=2344&hilit=belen#p2344
"Yes, a Valladao-Belen with a Bishop promotion, and the first to ever appear before the public !"
http://www.berlinthema.de/Auswahl_PH.pdf-"P.H.s (H48c) löste eine verstärkte Suche nach einer Darstellung mit der nun einzig noch feh- lenden Läuferumwandlung aus, und formell ist die (H48e) die Erstdarstellung. Allerdings sehen wir hier dieselbe gravierende thematische Schwäche wie in der (H48b), daß der Doppelschritt vor dem e.p.-Schlag nicht exklusiv ist und Schwarz ebenso den Einzelschritt spielen könnte – wodurch es zum gleichen Spiel kommt nur ohne den thematisch unabdingba- ren e.p.-Schlag."
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshown&tid=2367-"****...and the solution now is complete. Yes, You knew already, I'm sure: "habemus episcopus" - after Q, N and R, a promotion to Bishop in a published Valladao-Belen!"
https://www.chessproblem.net/viewtopic.php?f=7&t=1078&p=2344&hilit=belen#p2344
"Yes, a Valladao-Belen with a Bishop promotion, and the first to ever appear before the public !"
http://www.berlinthema.de/Auswahl_PH.pdf-"P.H.s (H48c) löste eine verstärkte Suche nach einer Darstellung mit der nun einzig noch feh- lenden Läuferumwandlung aus, und formell ist die (H48e) die Erstdarstellung. Allerdings sehen wir hier dieselbe gravierende thematische Schwäche wie in der (H48b), daß der Doppelschritt vor dem e.p.-Schlag nicht exklusiv ist und Schwarz ebenso den Einzelschritt spielen könnte – wodurch es zum gleichen Spiel kommt nur ohne den thematisch unabdingba- ren e.p.-Schlag."
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshown&tid=2367-"****...and the solution now is complete. Yes, You knew already, I'm sure: "habemus episcopus" - after Q, N and R, a promotion to Bishop in a published Valladao-Belen!"
Keywords: Belen Theme, Valladao Task, Checking key, under-promotion (L), En passant, Castling as mating move
Genre: n#
FEN: 8/4p2P/3p4/pPpp1P2/B1pP1P2/Br3p2/1P3P2/RNk1K3
Reprints: H48e Der Reiz des Ungewöhnlichen
(1) MatPlus.net Forum Moremovers 10/8/2019
Input: James Malcom, 2020-09-22
Last update: Alfred Pfeiffer, 2020-09-22 more...
Genre: n#
FEN: 8/4p2P/3p4/pPpp1P2/B1pP1P2/Br3p2/1P3P2/RNk1K3
Reprints: H48e Der Reiz des Ungewöhnlichen
(1) MatPlus.net Forum Moremovers 10/8/2019
Input: James Malcom, 2020-09-22
Last update: Alfred Pfeiffer, 2020-09-22 more...
8 - P1380148
James Malcom
Peter Hoffmann
H48d Der Reiz des Ungewöhnlichen 9/2020
JM nach PH
(15+7) C+
#5
James Malcom
Peter Hoffmann
H48d Der Reiz des Ungewöhnlichen 9/2020
JM nach PH
(15+7) C+
#5
1. Sxc3+! Kc2 2. b8=T! d5 3. cxd6ep Dxb5,Dc6 4. Txb5,Lxc6 Kd3 5. 0-0-0#
3. exd6ep? Dxe6+!
3. Lxd5? Dd8!
See P1380143
http://www.berlinthema.de/Auswahl_PH.pdf-"James Malcom weist darauf hin, daß ohne die schwarze Logik in der Widerlegung der Damenumwandlung man eine eindeutige Zugreihenfolge in der Lösungsphase erhalten kann. Danke für das Interesse an unserer Schrift!"
3. exd6ep? Dxe6+!
3. Lxd5? Dd8!
See P1380143
http://www.berlinthema.de/Auswahl_PH.pdf-"James Malcom weist darauf hin, daß ohne die schwarze Logik in der Widerlegung der Damenumwandlung man eine eindeutige Zugreihenfolge in der Lösungsphase erhalten kann. Danke für das Interesse an unserer Schrift!"
James Malcom: Some months back, I managed to improve Hoffmann's P1380143. But has only been published recently alongside it, and ironically in the same month. The point here is that there is but a single solution. It turned out to be scarcely possible, requiring every White man but the queen. (2020-09-22)
comment
comment
Keywords: Belen Theme, Valladao Task, Capture key, Checking key, under-promotion (T), En passant, Castling as mating move
Genre: n#
FEN: B1N1q3/1P1p4/4P1p1/1RP1P1P1/8/BPp2p2/pP3P2/RNk1K3
Input: James Malcom, 2020-09-22
Last update: Olaf Jenkner, 2021-01-04 more...
Genre: n#
FEN: B1N1q3/1P1p4/4P1p1/1RP1P1P1/8/BPp2p2/pP3P2/RNk1K3
Input: James Malcom, 2020-09-22
Last update: Olaf Jenkner, 2021-01-04 more...
1. b8=D? Lb3!
1. Lxa2+! Kc2 2. b8=D Kxd3 3. 0-0-0#
2. ... e2,~ 3. Db1#
1. ... Kb2 2. b8=D+ Kxa1 3. Db1#
2. ... Kxa3 3. Lb1#,Lxc4#
2. ... Kc2 3. Db1#
https://www.chessproblem.net/viewtopic.php?f=7&t=60&p=2362
1. Lxa2+! Kc2 2. b8=D Kxd3 3. 0-0-0#
2. ... e2,~ 3. Db1#
1. ... Kb2 2. b8=D+ Kxa1 3. Db1#
2. ... Kxa3 3. Lb1#,Lxc4#
2. ... Kc2 3. Db1#
https://www.chessproblem.net/viewtopic.php?f=7&t=60&p=2362
Keywords: Belen Theme, Capture key, Checking key, Promotion, Castling as mating move
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/1P6/8/8/2ppp3/P1pPp1n1/b7/RBk1K1N1
Input: James Malcom, 2020-09-22
Last update: James Malcom, 2020-09-23 more...
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/1P6/8/8/2ppp3/P1pPp1n1/b7/RBk1K1N1
Input: James Malcom, 2020-09-22
Last update: James Malcom, 2020-09-23 more...
1. Lc7+! Kxc7 2. Da6 Kd6 3. 0-0-0+ Sd7#
See P0533854
https://www.chessproblem.net/viewtopic.php?f=7&t=60&p=2362
See P0533854
https://www.chessproblem.net/viewtopic.php?f=7&t=60&p=2362
Keywords: Belen Theme ("Reversed"), Checking key, Castling
Genre: h#
Computer test: popeye 4.85
FEN: rbK1k3/qp6/1p6/1PN5/8/8/4P3/2R5
Input: James Malcom, 2020-09-22
Last update: Alfred Pfeiffer, 2020-09-22 more...
Genre: h#
Computer test: popeye 4.85
FEN: rbK1k3/qp6/1p6/1PN5/8/8/4P3/2R5
Input: James Malcom, 2020-09-22
Last update: Alfred Pfeiffer, 2020-09-22 more...
1. d8=L!
1. ... Tb8 2. cxb8=L! d4 3. Le5 Lxf4+ 4. Lxf4#
1. ... Txd8 2. cxd8=S! d4 3. Se6 Lxf4+ 4. Sxf4#
1. ... Ta8 2. h8=D! Txd8 3. Txe3+ Kxe3 4. De5#
2. ... d4 3. Dxd4 ... 4. Dxe3#,Txe3#
1. ... Txc7 2. Lxc7 d4 3. Le5 Lxf4+ 4. Lxf4#
1. ... d4 2. Sc4 ... 3. Txd2+ Ke1 4. Lxf2#
https://www.chess.com/forum/view/more-puzzles/a-challenging-mate-in-5-can-you-find-the-first-move?page=3
1. ... Tb8 2. cxb8=L! d4 3. Le5 Lxf4+ 4. Lxf4#
1. ... Txd8 2. cxd8=S! d4 3. Se6 Lxf4+ 4. Sxf4#
1. ... Ta8 2. h8=D! Txd8 3. Txe3+ Kxe3 4. De5#
2. ... d4 3. Dxd4 ... 4. Dxe3#,Txe3#
1. ... Txc7 2. Lxc7 d4 3. Le5 Lxf4+ 4. Lxf4#
1. ... d4 2. Sc4 ... 3. Txd2+ Ke1 4. Lxf2#
https://www.chess.com/forum/view/more-puzzles/a-challenging-mate-in-5-can-you-find-the-first-move?page=3
Keywords: under-promotion key (L), Promotion (D), under-promotion (S)
Genre: n#
Computer test: Popeye 4.61
FEN: 2r1R3/2PP3P/1N5K/1P1p4/1p3P2/1B1pbp2/3pkrp1/3R1bB1
Input: James Malcom, 2020-09-27
Last update: A.Buchanan, 2020-10-13 more...
Genre: n#
Computer test: Popeye 4.61
FEN: 2r1R3/2PP3P/1N5K/1P1p4/1p3P2/1B1pbp2/3pkrp1/3R1bB1
Input: James Malcom, 2020-09-27
Last update: A.Buchanan, 2020-10-13 more...
12 - P1380368
James Malcom
MatPlus.net Forum 22/9/2020
Gewidmet Zalmen Kornin & Peter Hoffmann
(14+9) C+
#7
James Malcom
MatPlus.net Forum 22/9/2020
Gewidmet Zalmen Kornin & Peter Hoffmann
(14+9) C+
#7
1. Sc3+! Kc2 2. exd4 hxg1=D+,T+ 3. Txg1 Lxh5 4. g4 fxg3ep 5. Txg3 Lg4 6. Txg4 Kd3 7. 0-0-0#
http://matplus.net/start.php?px=1601242024&app=forum&act=posts&fid=gen&tid=2488
http://www.berlinthema.de/Auswahl_PH.pdf-"J.M. arbeitete weiter am Valladao-Belén und konnte ihn schließlich gemischtfarbig zeigen! Den „Umwandlungsdual“ halten wir für irrelevant, da ohne Pattmotiv die Turmumwandlung kein eigenständiger Zug ist. Und wir anerkennen durchaus die Pionierleistung! Andererseits ist ein ungedecktes Satzmatt eine sehr häßliche Konstruktionserleichterung."
http://matplus.net/start.php?px=1601242024&app=forum&act=posts&fid=gen&tid=2488
http://www.berlinthema.de/Auswahl_PH.pdf-"J.M. arbeitete weiter am Valladao-Belén und konnte ihn schließlich gemischtfarbig zeigen! Den „Umwandlungsdual“ halten wir für irrelevant, da ohne Pattmotiv die Turmumwandlung kein eigenständiger Zug ist. Und wir anerkennen durchaus die Pionierleistung! Andererseits ist ein ungedecktes Satzmatt eine sehr häßliche Konstruktionserleichterung."
Keywords: Belen Theme, Valladao Task, Checking key, En passant, Promotion, under-promotion (t), Castling as mating move
Genre: n#
Computer test: Popeye 4.61
FEN: 8/5B2/6P1/3P3Q/2pq1pb1/Bp2Pp2/pP3PPp/RNk1K1NR
Reprints: H48i Der Reiz des Ungewöhnlichen 9/2020
Input: James Malcom, 2020-09-27
Last update: James Malcom, 2021-12-26 more...
Genre: n#
Computer test: Popeye 4.61
FEN: 8/5B2/6P1/3P3Q/2pq1pb1/Bp2Pp2/pP3PPp/RNk1K1NR
Reprints: H48i Der Reiz des Ungewöhnlichen 9/2020
Input: James Malcom, 2020-09-27
Last update: James Malcom, 2021-12-26 more...
Henrik Juel: Apparently there is a #3
1.c4? Kxc2 2.Sc3 Kxd3 3.0-0-0?
But two facts prevent this try
1. Black has no last move, so he has the move
2. wKe1 must have moved, so White cannot castle
The solution is
0... Kxc2 1.Sd2 Kxd3 2.Sc4 Kc2 3.Se3+ Kd3 4.Td1#
C+ Popeye 4.61 (2020-09-29)
comment
1.c4? Kxc2 2.Sc3 Kxd3 3.0-0-0?
But two facts prevent this try
1. Black has no last move, so he has the move
2. wKe1 must have moved, so White cannot castle
The solution is
0... Kxc2 1.Sd2 Kxd3 2.Sc4 Kc2 3.Se3+ Kd3 4.Td1#
C+ Popeye 4.61 (2020-09-29)
comment
Keywords: Rex solus (s), Belen Theme (Anti-), Cant Castler, No legal last move for Black, Capture key
Genre: n#, Retro
Computer test: Popeye 4.61
FEN: 8/8/8/8/8/BPPP1P2/PPB2P2/RNk1KR2
Input: A.Buchanan, 2020-09-29
Last update: Alfred Pfeiffer, 2020-10-08 more...
Genre: n#, Retro
Computer test: Popeye 4.61
FEN: 8/8/8/8/8/BPPP1P2/PPB2P2/RNk1KR2
Input: A.Buchanan, 2020-09-29
Last update: Alfred Pfeiffer, 2020-10-08 more...
A retro try is:
1. c4? Kxd3 2. Sc3 Kd4 3. Ld6 Kd3 4. 0-0-0#?
2. ... Kc2 3. c5 Kd3 4. 0-0-0#?
but wK has moved, so neither line works.
1. f3! Kxd3 2. Kf2 Kc2 3. Se3+ Kd3 4. Td1#
R: 1. Kc1xLc2 Lb1xTc2,Lb1xSc2
So OK for WTM
1. c4? Kxd3 2. Sc3 Kd4 3. Ld6 Kd3 4. 0-0-0#?
2. ... Kc2 3. c5 Kd3 4. 0-0-0#?
but wK has moved, so neither line works.
1. f3! Kxd3 2. Kf2 Kc2 3. Se3+ Kd3 4. Td1#
R: 1. Kc1xLc2 Lb1xTc2,Lb1xSc2
So OK for WTM
Henrik Juel: Compared to James's P1380439:
1. Last move could be Kc1xLc2, so White has the move
2. White may not castle, so
1.c4? Kxd3 2.Sc3 Kd4 3.Ld6 Kd3 4.0-0-0, 2... Kc2 3.c5 Kd3 4.0-0-0 is a try
The solution is
1.f3 Kxd3 2.Kf2 Kd2 3.Se3 Kd3 4.Td1#
2... Kc2 3.Se3+ Kd3,Kd2 4.Td1#
C+ Popeye 4.61
Very nice, James and Andrew (2020-09-29)
A.Buchanan: Thanks Henrik - Belen precondition of bKc1 was satisfied 1.0 move ago. From that position there is a sound #5 but position is clunky and not Meredith.
You didn’t fall into the trap of thinking Black has no last move: there is a dualized solution with BTM waiting for you if you did. (2020-09-30)
James Malcom: Haha, yeah. I fell for Andrew's trap, hook, line, and sinker! :-) (2020-09-30)
comment
1. Last move could be Kc1xLc2, so White has the move
2. White may not castle, so
1.c4? Kxd3 2.Sc3 Kd4 3.Ld6 Kd3 4.0-0-0, 2... Kc2 3.c5 Kd3 4.0-0-0 is a try
The solution is
1.f3 Kxd3 2.Kf2 Kd2 3.Se3 Kd3 4.Td1#
2... Kc2 3.Se3+ Kd3,Kd2 4.Td1#
C+ Popeye 4.61
Very nice, James and Andrew (2020-09-29)
A.Buchanan: Thanks Henrik - Belen precondition of bKc1 was satisfied 1.0 move ago. From that position there is a sound #5 but position is clunky and not Meredith.
You didn’t fall into the trap of thinking Black has no last move: there is a dualized solution with BTM waiting for you if you did. (2020-09-30)
James Malcom: Haha, yeah. I fell for Andrew's trap, hook, line, and sinker! :-) (2020-09-30)
comment
Keywords: Rex solus, Belen Theme (Normal & Anti-), Cant Castler
Genre: n#, Retro
FEN: 8/8/8/8/8/BPPP4/PPk2P2/R2NK3
Input: A.Buchanan, 2020-09-29
Last update: A.Buchanan, 2021-07-17 more...
Genre: n#, Retro
FEN: 8/8/8/8/8/BPPP4/PPk2P2/R2NK3
Input: A.Buchanan, 2020-09-29
Last update: A.Buchanan, 2021-07-17 more...
1. Ka4 0-0 2. Lh1 Le1 3. g2 Tf4#
Theme: Double square vacation in a helpmate
https://www.chess.com/forum/view/general/helpmate-in-3-moves
Theme: Double square vacation in a helpmate
https://www.chess.com/forum/view/general/helpmate-in-3-moves
A.Buchanan: I really like this one :-) (2020-10-01)
A.Buchanan: If you can start the bishops on f1 & g1, then could have #h4 with the end position being double platzwechsel. Easy to get the h#3.5 - shift Lf2 to g1 & change Be3 to White. I can't help the nagging feeling that I might have seen this double swap somewhere before, but I think it was Black doing the castling (2020-10-01)
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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)
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1. g3 d6 2. Lg2 Dd7 3. Ld5 Dh3 4. Le6 fxe6 5. a4 Kf7 6. a5 Kg6 7. a6 Kh5 8. axb7 g6 9. bxa8=L Lg7 10. Lg2 Lxb2 11. Sf3 Lg7 12. Lb2 Lb7
James Malcom: The theme is that 5 bishops are fianchettoed-one more than normally allowed! (2020-10-13)
Rainer Staudte: Rules allow a 20-bishops-fianchetto. (2020-10-13)
Henrik Juel: Very nice, James
For this short PG any tester will suffice, but if you push this idea further, Natch is much faster than Jacobi (2020-10-13)
A.Buchanan: Can’t a fianchettoed bishop go round to the bank rank and do it again? So even 20 is not a barrier (2020-10-13)
A.Buchanan: Dates in PDB are yyyy-mm-dd or dd/mm/yyyy. Hence I will change publication date from Dec to Oct (2020-10-13)
James Malcom: Right-the date slipped me again!
Andrew, while a bishop can easily be fianchettoed twice+, about the number of bishops doing it, not how many times it is done. I'm sure that an expert could do 6 fianchettoing bishops. (2020-10-13)
A.Buchanan: I am joking James: this is cool already (2020-10-13)
comment
Rainer Staudte: Rules allow a 20-bishops-fianchetto. (2020-10-13)
Henrik Juel: Very nice, James
For this short PG any tester will suffice, but if you push this idea further, Natch is much faster than Jacobi (2020-10-13)
A.Buchanan: Can’t a fianchettoed bishop go round to the bank rank and do it again? So even 20 is not a barrier (2020-10-13)
A.Buchanan: Dates in PDB are yyyy-mm-dd or dd/mm/yyyy. Hence I will change publication date from Dec to Oct (2020-10-13)
James Malcom: Right-the date slipped me again!
Andrew, while a bishop can easily be fianchettoed twice+, about the number of bishops doing it, not how many times it is done. I'm sure that an expert could do 6 fianchettoing bishops. (2020-10-13)
A.Buchanan: I am joking James: this is cool already (2020-10-13)
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Keywords: Promotion (L), Phoenix, Impostor (L), Unique Proof Game
Genre: Retro
Computer test: Jacobi v0.7.5
FEN: 1n4nr/pbp1p1bp/3pp1p1/7k/8/5NPq/1BPPPPBP/RN1QK2R
Input: James Malcom, 2020-10-13
Last update: A.Buchanan, 2021-04-06 more...
Genre: Retro
Computer test: Jacobi v0.7.5
FEN: 1n4nr/pbp1p1bp/3pp1p1/7k/8/5NPq/1BPPPPBP/RN1QK2R
Input: James Malcom, 2020-10-13
Last update: A.Buchanan, 2021-04-06 more...
1. Kg4 Lf1 2. Kf3 Ke1 3. g4 Sg1#
http://superproblem.ru/archive/probl/H3/Malcom-h3-2020.gif
http://superproblem.ru/archive/probl/H3/Malcom-h3-2020.gif
Genre: h#
Computer test: Popeye 4.61
FEN: 8/8/8/6pk/4pb2/4p1pN/6B1/3K4
Input: James Malcom, 2020-10-17
Last update: Alfred Pfeiffer, 2020-10-19 more...
1. Ta1+! Kg2 2. Tb2+ Kf3 3. Ta3+ Ke4 4. Tb4+ Kd5 5. Ta5+ Kc6 6. Tc4+ Kb7 7. Tc7+ Kxa8 8. Ke7+ Dxf8#
7 square route of the Black king
http://superproblem.ru/archive/probl/Sn/Malcom-s8-2020.gif
7 square route of the Black king
http://superproblem.ru/archive/probl/Sn/Malcom-s8-2020.gif
Olaf Jenkner: wBg3, +wPh2 you get a model mate (2020-10-18)
A.Buchanan: Can one begin with wTa3b3 so there is a genuine try 1. Tb1? (2020-10-19)
James Malcom: It turns out that this record was actually done, doubled, by P1371538. So a 14 square route of the Black king appears to be the record, for now anyway. (2021-01-01)
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A.Buchanan: Can one begin with wTa3b3 so there is a genuine try 1. Tb1? (2020-10-19)
James Malcom: It turns out that this record was actually done, doubled, by P1371538. So a 14 square route of the Black king appears to be the record, for now anyway. (2021-01-01)
more ...
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Keywords: corner to corner, Checking key, Superseded by (P1371538)
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: N3KQqr/P2P4/3BP3/5P2/6p1/1R5p/R7/7k
Input: James Malcom, 2020-10-17
Last update: James Malcom, 2021-01-01 more...
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: N3KQqr/P2P4/3BP3/5P2/6p1/1R5p/R7/7k
Input: James Malcom, 2020-10-17
Last update: James Malcom, 2021-01-01 more...
1. Kc1! d6 2. h8=S! gxh6 3. Sg6 h5 4. Sf4 h4 5. Sxd3 h3 6. Se1 h2 7. Sc2#
https://www.matplus.net/start.php?px=1603494562&app=forum&act=posts&fid=xshown&tid=2346
https://www.matplus.net/start.php?px=1603494562&app=forum&act=posts&fid=xshown&tid=2346
James Malcom: This composition is one of my personal favorites amongst mine. It was inspired be Krabbe's Journal #89, which touches on the so called theme of "remote knight promotion." The point of this is to show the aximum diaganol distance with kings and pawns only.
A Meredith rendering is still pending for any geniuses out there. (2020-10-24)
more ...
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A Meredith rendering is still pending for any geniuses out there. (2020-10-24)
more ...
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Keywords: Stalemate avoidance, Kindergarten Problem, under-promotion (S)
Genre: n#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/3p2pP/7P/p2P4/p7/P2p4/p2P4/k2K4
Input: James Malcom, 2020-10-24
Last update: Alfred Pfeiffer, 2020-10-26 more...
Genre: n#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/3p2pP/7P/p2P4/p7/P2p4/p2P4/k2K4
Input: James Malcom, 2020-10-24
Last update: Alfred Pfeiffer, 2020-10-26 more...
1. Tf5+! Sxf5+ 2. Se4+! Sxe4 3. De6#
James Malcom: I've added in the solution now. (2020-11-02)
Henrik Juel: Thanks, James
I cannot test the problem, but it seems OK (2020-11-02)
A.Buchanan: Thanks Henrik: it's C+ according to WinChloe (2020-11-03)
comment
Henrik Juel: Thanks, James
I cannot test the problem, but it seems OK (2020-11-02)
A.Buchanan: Thanks Henrik: it's C+ according to WinChloe (2020-11-03)
comment
Keywords: Aristocrat, Bosma
Genre: 3#, Fairies
Computer test: C+ WinChloe v3.51
FEN: 3r2R1/3Q4/3K1k2/2n1R3/1b6/6n1/3N3q/3r4
Input: A.Buchanan, 2020-10-25
Last update: A.Buchanan, 2020-11-03 more...
Genre: 3#, Fairies
Computer test: C+ WinChloe v3.51
FEN: 3r2R1/3Q4/3K1k2/2n1R3/1b6/6n1/3N3q/3r4
Input: A.Buchanan, 2020-10-25
Last update: A.Buchanan, 2020-11-03 more...
1. ... c4 2. Se4 h4 3. g5 hxg5 4. f5 d4#
Record of 3+2 pawn double-steps by White and Black
http://superproblem.ru/archive/probl/Hn/Malkom-h35-2020.gif
Record of 3+2 pawn double-steps by White and Black
http://superproblem.ru/archive/probl/Hn/Malkom-h35-2020.gif
Keywords: Construction task, Construction record
Genre: h#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/5pp1/3pb3/4k1n1/8/4P3/K1PP3P/8
Input: James Malcom, 2020-10-25
Last update: Alfred Pfeiffer, 2020-10-26 more...
Genre: h#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/5pp1/3pb3/4k1n1/8/4P3/K1PP3P/8
Input: James Malcom, 2020-10-25
Last update: Alfred Pfeiffer, 2020-10-26 more...
1. Ta5+! b5 2. Txb5+ c5 3. Txc5+ d5 4. Txd5+ e5 5. Txe5 f5 6. Txf5+ g5 7. Tgxg5+ hxg5 8. g4+ Dxg4#
Record of 1+6 pawn double-steps by White and Black
http://superproblem.ru/archive/probl/Sn/Malcom-s8-2020-1.gif
Record of 1+6 pawn double-steps by White and Black
http://superproblem.ru/archive/probl/Sn/Malcom-s8-2020-1.gif
Keywords: Construction task, Construction record, Checking key
Genre: s#
Computer test: SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-10-25)
FEN: 4n1NN/1pppppp1/R6p/7k/6R1/7K/5pPP/6q1
Input: James Malcom, 2020-10-25
Last update: Alfred Pfeiffer, 2020-10-26 more...
Genre: s#
Computer test: SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-10-25)
FEN: 4n1NN/1pppppp1/R6p/7k/6R1/7K/5pPP/6q1
Input: James Malcom, 2020-10-25
Last update: Alfred Pfeiffer, 2020-10-26 more...
1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 hxg2 5. exf8=B gxh1=T 6. Lg2 Ke7 7. Lxb7 Ke6 8. Lxa8 Se7 9. Lb7 Txf8 10. Lxc8
http://matplus.net/start.php?px=1603899391&app=forum&act=posts&tid=2475&fid=gen&page=1
http://matplus.net/start.php?px=1603899391&app=forum&act=posts&tid=2475&fid=gen&page=1
James Malcom: The point of this PG was to make a true Belfort, after the lone bishop in P1379376 was pointed out to not be a true Belfort. (2020-10-28)
A.Buchanan: Belfort is not in the Encyclopedia! (2020-10-30)
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A.Buchanan: Belfort is not in the Encyclopedia! (2020-10-30)
more ...
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Keywords: Schnoebelen Theme (B), Dummy Pawn, Golden Age (Dummy Pawn), Belfort (Lt), Prenix (t), Prentos Theme (B), Ceriani-Frolkin Theme (B), Unique Proof Game
Genre: Retro
Computer test: Jacobi v.0.7.5
FEN: 1nBq1r2/p1ppnpp1/4k3/8/8/8/PPPPP2P/RNBQK1Nr
Input: James Malcom, 2020-10-28
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro
Computer test: Jacobi v.0.7.5
FEN: 1nBq1r2/p1ppnpp1/4k3/8/8/8/PPPPP2P/RNBQK1Nr
Input: James Malcom, 2020-10-28
Last update: A.Buchanan, 2023-08-04 more...
1. 0-0#!
https://chess.stackexchange.com/a/29992/15543
https://chess.stackexchange.com/a/29992/15543
A.Buchanan: Hi James, couple of nits about old Bosma:
(1) From the 1985 Laws: "Article 5. THE MOVES OF THE PIECES The King (a) Except when cast[l]ing, the king moves to any adjoining square that is not attacked by an opponent's piece." This is separate from Article 9. CHECK 9.1 "The king is In check when the square it occupies is attacked by one or two of the opponent's pieces; in this case the latter is or are said to be "checking the king.' 9.2 Check must be parried by the [move] immediately following." This point may have been an assumption in earlier compositions, as e.g. it prevents kings from being adjacent.
(2) And again from Article 5. "(f) Castling is prevented for the time being - (i) if the king's original square or the square which the king must cross over or that which it is to occupy is attacked by an opponent's piece," Does this prevent your 1.0-0?
What do you think? (2020-11-08)
James Malcom: Ah, why did I but never bother to look at the castling rules!
Well I see nothing against adjacent kings, and seeing about how the "loophole" was about was not explicitly stated couldn't be done, I see it as allowed, and thus what to watch out for in cooks.
The rule on castling says "piece," not pieces. So, quite simply, castling in, out (P1381498), and through (P1381499) check is allowed in my view. (2020-11-09)
James Malcom: Furthermore, if a king is "attacked," they are in check, plain and simple. So, since a triple check/ attack is not defined as a danger to the king, the king may go to any such square, including the acts of catling and adjacent kings.
Also, going by the law itself, and not the Bosma conditions, the king may be captured, but it does nothing and that side can never be checkmated, while Bosma Chess itself allows no king capture. But since the effect is the same, allowing for my jokes to be C+ by Winchloe if the program agrees. Maybe try out my castlings in it? (2020-11-09)
James Malcom: And indeed Andrew has tested my castling problems now-all are C+? (2020-11-14)
James Malcom: Typo-!, not ?. (2020-11-14)
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(1) From the 1985 Laws: "Article 5. THE MOVES OF THE PIECES The King (a) Except when cast[l]ing, the king moves to any adjoining square that is not attacked by an opponent's piece." This is separate from Article 9. CHECK 9.1 "The king is In check when the square it occupies is attacked by one or two of the opponent's pieces; in this case the latter is or are said to be "checking the king.' 9.2 Check must be parried by the [move] immediately following." This point may have been an assumption in earlier compositions, as e.g. it prevents kings from being adjacent.
(2) And again from Article 5. "(f) Castling is prevented for the time being - (i) if the king's original square or the square which the king must cross over or that which it is to occupy is attacked by an opponent's piece," Does this prevent your 1.0-0?
What do you think? (2020-11-08)
James Malcom: Ah, why did I but never bother to look at the castling rules!
Well I see nothing against adjacent kings, and seeing about how the "loophole" was about was not explicitly stated couldn't be done, I see it as allowed, and thus what to watch out for in cooks.
The rule on castling says "piece," not pieces. So, quite simply, castling in, out (P1381498), and through (P1381499) check is allowed in my view. (2020-11-09)
James Malcom: Furthermore, if a king is "attacked," they are in check, plain and simple. So, since a triple check/ attack is not defined as a danger to the king, the king may go to any such square, including the acts of catling and adjacent kings.
Also, going by the law itself, and not the Bosma conditions, the king may be captured, but it does nothing and that side can never be checkmated, while Bosma Chess itself allows no king capture. But since the effect is the same, allowing for my jokes to be C+ by Winchloe if the program agrees. Maybe try out my castlings in it? (2020-11-09)
James Malcom: And indeed Andrew has tested my castling problems now-all are C+? (2020-11-14)
James Malcom: Typo-!, not ?. (2020-11-14)
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1. 0-0+!
1. ... Shxf1 2. Dg4#
1. ... Sgxf1 2. Df2#
1. ... Lxf1 2. Tf2#
https://chess.stackexchange.com/a/29992/15543
1. ... Shxf1 2. Dg4#
1. ... Sgxf1 2. Df2#
1. ... Lxf1 2. Tf2#
https://chess.stackexchange.com/a/29992/15543
A.Buchanan: Nice way to combine an orthodox theme with Bosma castling (2020-11-13)
James Malcom: Thanks, Andrew. Castling with check is the easiest way to achieve it of course, not to mention the flight taking. I'll try out a version without check, here soon. (2020-11-13)
comment
James Malcom: Thanks, Andrew. Castling with check is the easiest way to achieve it of course, not to mention the flight taking. I'll try out a version without check, here soon. (2020-11-13)
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Keywords: Joke, Bosma, Castling key, Checking key, x pieces capture on one square, Flight taking
Genre: 2#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 8/8/8/5B2/5p1Q/5kn1/2NRb2n/4K2R
Input: James Malcom, 2020-11-03
Last update: A.Buchanan, 2024-02-01 more...
Genre: 2#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 8/8/8/5B2/5p1Q/5kn1/2NRb2n/4K2R
Input: James Malcom, 2020-11-03
Last update: A.Buchanan, 2024-02-01 more...
1. Kc2#!
https://www.ecforum.org.uk/viewtopic.php?p=246809#p246809
Reprint: https://chess.stackexchange.com/a/29992/15543
https://www.ecforum.org.uk/viewtopic.php?p=246809#p246809
Reprint: https://chess.stackexchange.com/a/29992/15543
1. Se5#!
A.Buchanan: Trivial verification, perhaps, but at least it confirms that WinChloe's understanding of the condition resembles James'. (2020-11-13)
comment
comment
1. g8=D! droht 2. Df7#
1. ... Tf5 2. Dd8#
1. ... Le8 2. Dxe8#
1. ... Sh8 2. Df8#
1. ... Tf5 2. Dd8#
1. ... Le8 2. Dxe8#
1. ... Sh8 2. Df8#
Keywords: Promotion key (D), Flight taking
Genre: 2#
Computer test: Popeye 4.61
FEN: 1rR5/2P1k1PP/2b1P1nR/3r2P1/2B1N3/3pK3/8/8
Input: James Malcom, 2020-11-12
Last update: James Malcom, 2020-11-13 more...
Genre: 2#
Computer test: Popeye 4.61
FEN: 1rR5/2P1k1PP/2b1P1nR/3r2P1/2B1N3/3pK3/8/8
Input: James Malcom, 2020-11-12
Last update: James Malcom, 2020-11-13 more...
1. h8=D+! e5 2. dxe6ep+ Kxd3 3. 0-0-0#
2. ... Kxb4 3. Db2#
2. ... Kxb4 3. Db2#
Keywords: Valladao Task, Promotion key (D), En passant, Castling as mating move, Checking key, Flight-giving key
Genre: 3#
Computer test: popeye 4.85
FEN: 8/4p2P/3p4/2pP4/1R6/2kBp3/8/R3K1N1
Input: James Malcom, 2020-11-12
Last update: Alfred Pfeiffer, 2020-11-13 more...
Genre: 3#
Computer test: popeye 4.85
FEN: 8/4p2P/3p4/2pP4/1R6/2kBp3/8/R3K1N1
Input: James Malcom, 2020-11-12
Last update: Alfred Pfeiffer, 2020-11-13 more...
30 - P1381791
James Malcom
Facebook 26/09/2020
(16+15) C+
BP in 6.5
Where did the Black queen disapear?
James Malcom
Facebook 26/09/2020
(16+15) C+
BP in 6.5
Where did the Black queen disapear?
1. g3 b6 2. Lh3 La6 3. Lg4 Dc8 4. Sh3 Db7 5. 0-0 Dh1+ 6. Kxh1 Lc8 7. Te1
Keywords: Unique Proof Game, Castling, Switchback (l)
Genre: Retro
Computer test: C+ Natch 3.1
FEN: rnb1kbnr/p1pppppp/1p6/8/6B1/6PN/PPPPPP1P/RNBQR2K
Input: James Malcom, 2020-11-12
Last update: James Malcom, 2021-02-14 more...
Genre: Retro
Computer test: C+ Natch 3.1
FEN: rnb1kbnr/p1pppppp/1p6/8/6B1/6PN/PPPPPP1P/RNBQR2K
Input: James Malcom, 2020-11-12
Last update: James Malcom, 2021-02-14 more...
1. Dxc4!
1. ... Kxe5 2. Dxd5#
1. ... Tdxe5 2. Sxd6#
1. ... Texe5 2. Txf4#
1. ... Lxe5 2. Dxe4#
1. ... dxe5 2. Txf6#
1. ... fxe5 2. Tg5#
https://www.chess.com/forum/view/more-puzzles/x-marks-the-spot-mate-in-2?page=1
1. ... Kxe5 2. Dxd5#
1. ... Tdxe5 2. Sxd6#
1. ... Texe5 2. Txf4#
1. ... Lxe5 2. Dxe4#
1. ... dxe5 2. Txf6#
1. ... fxe5 2. Tg5#
https://www.chess.com/forum/view/more-puzzles/x-marks-the-spot-mate-in-2?page=1
Keywords: x pieces capture on one square (6), x pieces move to one square (6), x pieces defend on one square (6), Capture key
Genre: 2#
Computer test: popeye 4.85
FEN: B7/5K2/R2p1p2/1NprPk2/Q1pbrpR1/2p1pP1N/2P1P3/8
Input: James Malcom, 2020-11-16
Last update: Alfred Pfeiffer, 2020-11-17 more...
Genre: 2#
Computer test: popeye 4.85
FEN: B7/5K2/R2p1p2/1NprPk2/Q1pbrpR1/2p1pP1N/2P1P3/8
Input: James Malcom, 2020-11-16
Last update: Alfred Pfeiffer, 2020-11-17 more...
1. Tb2+? Ka3!
1. Lf3! ... 2. Ld1#
Inspired by P1182074
White releases stalemate as a #2, giving Black 20(!) moves. First record in a new task. See:
http://matplus.net/start.php?px=1606065655&app=forum&act=posts&fid=gen&tid=2586&pid=20040#n20040
1. Lf3! ... 2. Ld1#
Inspired by P1182074
White releases stalemate as a #2, giving Black 20(!) moves. First record in a new task. See:
http://matplus.net/start.php?px=1606065655&app=forum&act=posts&fid=gen&tid=2586&pid=20040#n20040
Henrik Juel: No record, P1182074 is far better in terms of giving Black moves, 32
But this problem also a #2 (2020-11-22)
A.Buchanan: First record in a new task (2020-11-22)
James Malcom: Henrik, you misunderstood! The task is different from the 32! This is about Black release in the #2 form, not releae in the fairy form. (2020-11-22)
comment
But this problem also a #2 (2020-11-22)
A.Buchanan: First record in a new task (2020-11-22)
James Malcom: Henrik, you misunderstood! The task is different from the 32! This is about Black release in the #2 form, not releae in the fairy form. (2020-11-22)
comment
Keywords: Stalemate dissolution
Genre: 2#
Computer test: Popeye 4.85
FEN: 8/8/NN1p4/1p1B4/1Pr5/1kb4R/3R4/1KB5
Input: James Malcom, 2020-11-22
Last update: James Malcom, 2021-06-22 more...
Genre: 2#
Computer test: Popeye 4.85
FEN: 8/8/NN1p4/1p1B4/1Pr5/1kb4R/3R4/1KB5
Input: James Malcom, 2020-11-22
Last update: James Malcom, 2021-06-22 more...
1. a4+! Kc5 2. b4+ Kd5 3. c4+ Ke5 4. d4+ Kf5 5. e4+ Kg5 6. f4+ Kh6 7. g4 Txa6 8. g5#
7. ... Lg8 8. Txh5#
7 pawn double-steps by White
http://superproblem.ru/archive/probl/N/Malcom-8x-2020.gif
7. ... Lg8 8. Txh5#
7 pawn double-steps by White
http://superproblem.ru/archive/probl/N/Malcom-8x-2020.gif
SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-11-25)
James Malcom: Houston, we have a problem: I merely marked this as C+, and the entire position just disappeared?! (2020-12-30)
Gerd Wilts: Hi James, this was unfortunately a new bug introduced yesterday evening with a PDB update. It is now fixed. (2020-12-31)
comment
James Malcom: Houston, we have a problem: I merely marked this as C+, and the entire position just disappeared?! (2020-12-30)
Gerd Wilts: Hi James, this was unfortunately a new bug introduced yesterday evening with a PDB update. It is now fixed. (2020-12-31)
comment
Keywords: Construction record
Genre: n#
FEN: 1N6/r2p2pb/R5p1/1k5p/7R/7K/PPPPPPP1/8
Input: James Malcom, 2020-11-25
Last update: Gerd Wilts, 2020-12-31 more...
Genre: n#
FEN: 1N6/r2p2pb/R5p1/1k5p/7R/7K/PPPPPPP1/8
Input: James Malcom, 2020-11-25
Last update: Gerd Wilts, 2020-12-31 more...
1. g4! Ka2 2. g5 Ka1 3. g6 Ka2 4. g7 Ka1 5. g8=L, Se2#,Sf3#,Sh3#
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
1. a4! Ka1 2. a5 Kb1 3. a6 Ka1 4. a7 Kb1 5. a8=T Se2#,Sf3#,Sh3#
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
1. g4! Kc2 2. g5 Kc1 3. g6 Kc2 4. g7 Kc1 5. g8=D Kc2 6. Dg5 axb2#
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
1. a4! Kh1 2. a5 Kh2 3. a6 Kh1 4. a7 h2 5. a8=S Se8#,Sh5#
4. ... Kh2 5. a8=L Se8#,Sh5#
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
4. ... Kh2 5. a8=L Se8#,Sh5#
http://matplus.net/start.php?px=1607098798&app=forum&act=posts&fid=gen&tid=2449
1. 0-0-0+! Sf1 2. Txf1#
http://matplus.net/start.php?px=1608213940&app=forum&act=posts&fid=xshow2&tid=2297
Both rook squares are maximally attacked
http://matplus.net/start.php?px=1608213940&app=forum&act=posts&fid=xshow2&tid=2297
Both rook squares are maximally attacked
Keywords: Castling key
Genre: 2#
Computer test: Popeye 4.61
FEN: 8/8/8/8/pppbbp1r/nr2pppB/q2n2Pp/R3K2k
Input: James Malcom, 2020-12-17
Last update: Alfred Pfeiffer, 2020-12-17 more...
Genre: 2#
Computer test: Popeye 4.61
FEN: 8/8/8/8/pppbbp1r/nr2pppB/q2n2Pp/R3K2k
Input: James Malcom, 2020-12-17
Last update: Alfred Pfeiffer, 2020-12-17 more...
1. hxg8=D! droht 2. Da8#
1. ... e5+ 2. fxe6ep#
1. ... g5 2. fxg6ep#
http://matplus.net/start.php?px=1608305486&app=forum&act=posts&fid=xshow3&tid=2525
1. ... e5+ 2. fxe6ep#
1. ... g5 2. fxg6ep#
http://matplus.net/start.php?px=1608305486&app=forum&act=posts&fid=xshow3&tid=2525
Keywords: Promotion key (D), En passant as mating move
Genre: 2#
Computer test: Popeye 4.61
FEN: 6n1/4pRpP/7B/5P1p/3K4/5k2/6R1/7B
Input: James Malcom, 2020-12-18
Last update: James Malcom, 2021-06-22 more...
Genre: 2#
Computer test: Popeye 4.61
FEN: 6n1/4pRpP/7B/5P1p/3K4/5k2/6R1/7B
Input: James Malcom, 2020-12-18
Last update: James Malcom, 2021-06-22 more...
1. ... c4! (Kb3?) 2. Th4 g4 3. Th7 h4 4. Dh6 f4 5. Lf7 f5#
4 pawn double steps by White
http://superproblem.ru/archive/probl/Hn/Malkom-h45-2020.gif
4 pawn double steps by White
http://superproblem.ru/archive/probl/Hn/Malkom-h45-2020.gif
SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-12-25)
Ladislav Packa: Construction can be more economical, the solution is the same:
Ka2, Pc2, f2, g2, h2 (5) - Kg6, Qc1, Rf4, Be8, Bg7, Pf6 (6)
C+ by Popeye v4.77 (2020-12-25)
James Malcom: Very beautiful economization Ladislav! (2020-12-26)
Olaf Jenkner: siehe auch die kürzere Fassung P1384242 (2020-12-26)
comment
Ladislav Packa: Construction can be more economical, the solution is the same:
Ka2, Pc2, f2, g2, h2 (5) - Kg6, Qc1, Rf4, Be8, Bg7, Pf6 (6)
C+ by Popeye v4.77 (2020-12-25)
James Malcom: Very beautiful economization Ladislav! (2020-12-26)
Olaf Jenkner: siehe auch die kürzere Fassung P1384242 (2020-12-26)
comment
Genre: h#
Computer test: Gustav 4.1d, Brute Force
FEN: 4b3/6p1/2p2pk1/8/K4r2/P7/2Pq1PPP/8
Input: James Malcom, 2020-12-25
Last update: James Malcom, 2021-06-22 more...
1. b1=B! Lxa3 2. c1=B! Dxc3#
Keywords: Dummy Pawn, Golden Age (Dummy Pawn), konsekutive Umwandlungen 2 (bb)
Genre: h#
Computer test: Popeye 4.79
FEN: 8/8/8/8/p2Q4/r1pKP3/ppp1P3/k1Bb4
Input: James Malcom, 2021-01-04
Last update: A.Buchanan, 2023-08-04 more...
Genre: h#
Computer test: Popeye 4.79
FEN: 8/8/8/8/p2Q4/r1pKP3/ppp1P3/k1Bb4
Input: James Malcom, 2021-01-04
Last update: A.Buchanan, 2023-08-04 more...
42 - P1385355
James Malcom
puzzling.stackexchange.com 28/06/2019
"The Slaughterhouse"
(16+3) C+
s#16 for Black
James Malcom
puzzling.stackexchange.com 28/06/2019
"The Slaughterhouse"
(16+3) C+
s#16 for Black
1. ... Lxg3+! 2. Kg1 Lh2+ 3. Kh1 Lxf4+ 4. Kg1 Lh2+ 5. Kh1 Lxe5+ 6. Kg1 Lh2+ 7. Kh1 Lxd6+ 8. Kg1 Lh2+ 9. Kh1 Lxc7+ 10. Kg1 Lh2+ 11. Kh1 Lxb8+ 12. Kg1 Lxa7+ 13. Sc5 Lxc5+ 14. Td4 Lxd4+ 15. Le3 Lxe3+ 16. Tf2+ Lxf2+ 17. Dxf2#
https://puzzling.stackexchange.com/questions/85630/the-slaughterhouse?
http://matplus.net/start.php?px=1610634596&app=forum&act=posts&fid=xshows&tid=2311
https://puzzling.stackexchange.com/questions/85630/the-slaughterhouse?
http://matplus.net/start.php?px=1610634596&app=forum&act=posts&fid=xshows&tid=2311
Henrik Juel: The motto is very apt
Why did you not frame the problem as a standard s#16, James? (2021-01-15)
James Malcom: It's probably because it was my first great leap at a long selfmate, and I didn't quite know all the conventions just yet. A color reversal should suffice for a C+ test. (2021-01-15)
SCHRECKE: C+, Gustav 4.1d, Brute Force (color reversal + rotation by 180 degrees) (2021-01-15)
A.Buchanan: In preserving this problem for future ages, I might tend to log the flipped version, and then record that the original was BTM, but up to you... :-) (2021-01-16)
comment
Why did you not frame the problem as a standard s#16, James? (2021-01-15)
James Malcom: It's probably because it was my first great leap at a long selfmate, and I didn't quite know all the conventions just yet. A color reversal should suffice for a C+ test. (2021-01-15)
SCHRECKE: C+, Gustav 4.1d, Brute Force (color reversal + rotation by 180 degrees) (2021-01-15)
A.Buchanan: In preserving this problem for future ages, I might tend to log the flipped version, and then record that the original was BTM, but up to you... :-) (2021-01-16)
comment
Keywords: Zwickmühle
Genre: s#
Computer test: Gustav 4.1d, Brute Force (color reversal + rotation by 180 degree)
FEN: 1N3Q2/PNP1PR2/3P4/P3P3/R4P2/6Pq/2B1k2b/2B4K
Reprints: Mat Plus 29/06/29
Input: James Malcom, 2021-01-14
Last update: James Malcom, 2021-06-07 more...
Genre: s#
Computer test: Gustav 4.1d, Brute Force (color reversal + rotation by 180 degree)
FEN: 1N3Q2/PNP1PR2/3P4/P3P3/R4P2/6Pq/2B1k2b/2B4K
Reprints: Mat Plus 29/06/29
Input: James Malcom, 2021-01-14
Last update: James Malcom, 2021-06-07 more...
1. hxg8=D! a1=D+ 2. Kh2 Dg1+ 3. Kxg1 b1=D+ 4. Kh2 Dg1+ 5. Kxg1 c1=D+ 6. Kh2 Dg1+ 7. Kxg1 d1=D+ 8. Kh2 Dg1+ 9. Kxg1 e1=D+ 10. Kh2 Dg1+ 11. Kxg1 Sf4 12. f8=D#
My first queening record
Record of 2+5 queen promotions
http://superproblem.ru/archive/probl/N/Malcom-12x-2020.gif
My first queening record
Record of 2+5 queen promotions
http://superproblem.ru/archive/probl/N/Malcom-12x-2020.gif
Keywords: Promotion (Dd), Promotion key, Promotion in the mating move, Superseded by (P1378033), Capture key, Pendulum (K), Promotions to queens, konsekutive Umwandlungen 7 (DdddddD)
Genre: n#
Computer test: a. Baumann: Gustav 4.2a
FEN: 2n3r1/3BkP1P/4Pp2/8/8/6BP/pppppPn1/6Kb
Input: James Malcom, 2021-02-01
Last update: Dieter Berlin, 2023-12-08 more...
Genre: n#
Computer test: a. Baumann: Gustav 4.2a
FEN: 2n3r1/3BkP1P/4Pp2/8/8/6BP/pppppPn1/6Kb
Input: James Malcom, 2021-02-01
Last update: Dieter Berlin, 2023-12-08 more...
1. ... Kf8 2. Ke7 3. Kd8 4. Kc8 5. Kb8 6. Ka7 7. Ka6 8. Kb5 9. Kc5 10. Kxd5 11. Ke5 12. Kf5 13. Kxg4 14. Kf5 15. Ke4 16. Kd3 17. Kc2 18. Kxc1 19. Kc2 20. Kd3 21. Ke4 22. Kf5 23. Kg5 24. Kxh6 25. Kg5 26. h5 27. h4 28. hxg3 29. g2 30. g1=S 31. Se2 32. Sc3 33. Sxb1 34. Sd2 0-0-0
https://www.chessproblem.net/viewtopic.php?t=1079
https://www.chessproblem.net/viewtopic.php?t=1079
Keywords: Seriesmover, Castling
Genre: Fairies
Computer test: popeye 4.85
FEN: 4N1k1/5B1p/2P1P2P/P2P4/6R1/p4pP1/P4P2/RNB1K3
Input: James Malcom, 2021-03-21
Last update: Arnold Beine, 2021-04-12 more...
Genre: Fairies
Computer test: popeye 4.85
FEN: 4N1k1/5B1p/2P1P2P/P2P4/6R1/p4pP1/P4P2/RNB1K3
Input: James Malcom, 2021-03-21
Last update: Arnold Beine, 2021-04-12 more...
1. ... a5 Lb2 2. La6 Lc1 3. Lc8 Lb2 4. Ld7 Lc1 5. Le8 Lb2 6. Lg6 Lc1 7. Lf5 Lb2 8. Lh3 Lc1 9. Lf1 Lb2 10. Le2 Lc1 11. Ld1 Lb2 12. Lc2 Lc1 13. Lxb1 Lb2 14. La2 0-0-0
https://www.chessproblem.net/viewtopic.php?t=1079
https://www.chessproblem.net/viewtopic.php?t=1079
James Malcom: C+ by Jacobi with the restraints that wKe1 & wRa1 do not move. Here is the code.
English fors 8/8/p1p1p3/1bP1P2p/p1p4P/PkPp1p2/3P1P2/RNB1K3
option FirstToMove black
stip a=b8 pie whi ke1 ra1 addpieces
constraints Ke1(0..0) Ra1(0..0)
stip h006 (2022-06-12)
James Malcom: Meant EnglishN, a command that allows for avoidance of FEN editing with knight usage. (2022-06-12)
A.Buchanan: Jacobi constraints operate under the principle that castling doesn't count as a move for king or rook. I guess one can disable castling rights separately if one wanted? (Not relevant for this problem.)
Cheeky nit: can one remove wPf2? (2022-06-13)
James Malcom: I suppose that might be possible.
And yes, let me check if it can be removed. (2022-06-13)
Joost de Heer: The constraint is for the 'sub-position' after 8 moves, not for the h006 stipulation. It's to avoid searching lines like '1. Ra2 2. Ra1' where castling rights were lost along the way.
Another method to test would be
stip a=b1 pie whi ke1 ra1 addpieces
[repeat 13 times]
stip h001 (2022-06-13)
Joost de Heer: WHich also proves that f2 can indeed be removed (C+ in less than a second) (2022-06-13)
A.Buchanan: Thanks Joost for clarifications.
And how about also removing h-file pawns and adding bPf5? (2022-06-13)
James Malcom: That is illegal Andrew, requiring one capture too many. Nor does it change the move amount. (2022-06-13)
Joost de Heer: Black needs 7 captures, and 7 white pieces missing, so -Pf2, -Ph4, -Ph5, +bPf5 seems to work (and is C+ with the '13 a to b stipulations' test. (2022-06-13)
James Malcom: Ah, did not see that. Economical improvements are always nice--thanks both. (2022-06-13)
Joost de Heer: wBc1 to b2 is of course a correct h0014.5. (2022-06-14)
James Malcom: True, but for a new length record, longer than a measly ply, an entirely different setting may be needed. (2022-06-14)
Olaf Jenkner: I think, it's cooked.
Black can lose a tempo between a6 and a8 or between e8 and g6. (2022-06-14)
James Malcom: How so, Olaf? With White to move and wBc1-b2, there is no tempo to lose. Any delay by Black only causes further delay. (2022-06-15)
Olaf Jenkner: You are right, it's not a matter of tempos. (2022-06-15)
James Malcom: As always happens, I came across a 1997 problem with the same idea, albeit being mostly unique: P1000693 (2022-06-29)
comment
English fors 8/8/p1p1p3/1bP1P2p/p1p4P/PkPp1p2/3P1P2/RNB1K3
option FirstToMove black
stip a=b8 pie whi ke1 ra1 addpieces
constraints Ke1(0..0) Ra1(0..0)
stip h006 (2022-06-12)
James Malcom: Meant EnglishN, a command that allows for avoidance of FEN editing with knight usage. (2022-06-12)
A.Buchanan: Jacobi constraints operate under the principle that castling doesn't count as a move for king or rook. I guess one can disable castling rights separately if one wanted? (Not relevant for this problem.)
Cheeky nit: can one remove wPf2? (2022-06-13)
James Malcom: I suppose that might be possible.
And yes, let me check if it can be removed. (2022-06-13)
Joost de Heer: The constraint is for the 'sub-position' after 8 moves, not for the h006 stipulation. It's to avoid searching lines like '1. Ra2 2. Ra1' where castling rights were lost along the way.
Another method to test would be
stip a=b1 pie whi ke1 ra1 addpieces
[repeat 13 times]
stip h001 (2022-06-13)
Joost de Heer: WHich also proves that f2 can indeed be removed (C+ in less than a second) (2022-06-13)
A.Buchanan: Thanks Joost for clarifications.
And how about also removing h-file pawns and adding bPf5? (2022-06-13)
James Malcom: That is illegal Andrew, requiring one capture too many. Nor does it change the move amount. (2022-06-13)
Joost de Heer: Black needs 7 captures, and 7 white pieces missing, so -Pf2, -Ph4, -Ph5, +bPf5 seems to work (and is C+ with the '13 a to b stipulations' test. (2022-06-13)
James Malcom: Ah, did not see that. Economical improvements are always nice--thanks both. (2022-06-13)
Joost de Heer: wBc1 to b2 is of course a correct h0014.5. (2022-06-14)
James Malcom: True, but for a new length record, longer than a measly ply, an entirely different setting may be needed. (2022-06-14)
Olaf Jenkner: I think, it's cooked.
Black can lose a tempo between a6 and a8 or between e8 and g6. (2022-06-14)
James Malcom: How so, Olaf? With White to move and wBc1-b2, there is no tempo to lose. Any delay by Black only causes further delay. (2022-06-15)
Olaf Jenkner: You are right, it's not a matter of tempos. (2022-06-15)
James Malcom: As always happens, I came across a 1997 problem with the same idea, albeit being mostly unique: P1000693 (2022-06-29)
comment
46 - P1388091
Andrew Buchanan
James Malcom
PS3645 The Problemist Supplement 171, p. 139, 03/2021
(5+9) C+
#10
Andrew Buchanan
James Malcom
PS3645 The Problemist Supplement 171, p. 139, 03/2021
(5+9) C+
#10
1. h7! dxc2 2. h8=S d3 3. Sg6 d4 4. Sf4 d5 5. Sxd3 d6 6. Sxb4 d3 7. Sxd3 d4 8. b4 d5 9. Sc5 d3 10. Sb3#
Henrik Juel: C+ Popeye 4.61
At first sight I thought that 1.h7 Lxc2 2.h8=DL thr. 3.DLxd4# would be a cook
but Black defends better by 1... dxc2!
Very impressive that the main variation is dual-free (2021-04-03)
comment
At first sight I thought that 1.h7 Lxc2 2.h8=DL thr. 3.DLxd4# would be a cook
but Black defends better by 1... dxc2!
Very impressive that the main variation is dual-free (2021-04-03)
comment
1. Sf6! droht 2. Sd7#
1. ... Tbd3 2. Tb5#
1. ... Ted3 2. Txe2#
1. ... Lc6 2. Txe3#
1. ... Sxf6 2. Tg5#
1. ... Tbd3 2. Tb5#
1. ... Ted3 2. Txe2#
1. ... Lc6 2. Txe3#
1. ... Sxf6 2. Tg5#
Genre: 2#
Computer test: Popeye 4.61
FEN: 8/2p1K3/4N1B1/3Nk3/2P3np/pr2rbRq/1R2n2B/Q7
Input: James Malcom, 2021-04-10
Last update: Felber, Volker, 2021-12-16 more...
a) 1. a4 h5 2. Ta3 h4 3. Tg3 h3 4. gxh3 a5 5. Lg2 Ta6 6. Kf1 Tg6 7. De1 Txg3 8. hxg3
b) 1. a4 h5 2. Ta3 h4 3. Tg3 hxg3 4. hxg3 Th3 5. gxh3 a5 6. Lg2 Ta6 7. Kf1 Th6 8. De1 Th8
b) 1. a4 h5 2. Ta3 h4 3. Tg3 hxg3 4. hxg3 Th3 5. gxh3 a5 6. Lg2 Ta6 7. Kf1 Th6 8. De1 Th8
Henrik Juel: The first 2.5 moves are identical between the two parts
The remaining moves are delightfully different
Neat find (2021-04-17)
more ...
comment
The remaining moves are delightfully different
Neat find (2021-04-17)
more ...
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: parts a) & b) C+ Euclide 1.01. No solution in 7.0
FEN: 1nbqkbnr/1pppppp1/8/p7/P7/6PP/1PPPPPB1/1NB1QKNR
Input: A.Buchanan, 2021-04-17
Last update: A.Buchanan, 2021-04-17 more...
Genre: Retro
Computer test: parts a) & b) C+ Euclide 1.01. No solution in 7.0
FEN: 1nbqkbnr/1pppppp1/8/p7/P7/6PP/1PPPPPB1/1NB1QKNR
Input: A.Buchanan, 2021-04-17
Last update: A.Buchanan, 2021-04-17 more...
1. a4 h5 2. a5 h4 3. a6 Th5 4. axb7 a5 5. b4 Ta6 6. b5 Tc6 7. bxc6 Tb5 8. d4 e5 9. d5 Ld6 10. Dd4 exd4 11. e4 Lg3 12. Ke2 d6 13. f3
Keywords: Unique Proof Game
Genre: Retro
Computer test: Euclide 1.01
FEN: 1nbqk1n1/1Pp2pp1/2Pp4/pr1P4/3pP2p/5Pb1/2P1K1PP/RNB2BNR
Input: James Malcom, 2021-05-26
Last update: James Malcom, 2021-12-12 more...
Genre: Retro
Computer test: Euclide 1.01
FEN: 1nbqk1n1/1Pp2pp1/2Pp4/pr1P4/3pP2p/5Pb1/2P1K1PP/RNB2BNR
Input: James Malcom, 2021-05-26
Last update: James Malcom, 2021-12-12 more...
1. f8=D! g5 2. Tg8 Kh1 3. Dh6+ Kg1 4. Dxg5 Kh1 5. Dh4+ Kg1 6. Dxg3 Kh1 7. Th8+ Kg1 8. Dh2#
1. f8=S! g5 2. Sh7 Kh1 3. Sxg5+ Kg1 4. Sh3+ Kh1 5. Sxf2+ Kg1 6. Sh3+ Kh1 7. Sg5+ Kg1 8. Sxf3#
1. f8=S! g5 2. Sh7 Kh1 3. Sxg5+ Kg1 4. Sh3+ Kh1 5. Sxf2+ Kg1 6. Sh3+ Kh1 7. Sg5+ Kg1 8. Sxf3#
SCHRECKE: C+, Gustav 4.1d, Brute Force (2021-07-17)
Henrik Juel: C+ Popeye 4.61
1.f8=D g5 2.Tg8 Kh1 3.Dh6+ Kg1 4.Dxg5 Kh1 5.Dh4+ Kg1 6.Dxg3 Kh1 7.Th8+ Kg1 8.Dh2#
1.f8=S g5 2.Sh7 Kh1 3.Sxg5+ Kg1 4.Sh3+ Kh1 5.Sxf2+ Kg1 6.Sh3+ Kh1 7.Sg5+ Kg1 8.Sxf3#
Two very different solutions (2021-07-17)
James Malcom: See P1401781 for an improvement. (2022-06-12)
comment
Henrik Juel: C+ Popeye 4.61
1.f8=D g5 2.Tg8 Kh1 3.Dh6+ Kg1 4.Dxg5 Kh1 5.Dh4+ Kg1 6.Dxg3 Kh1 7.Th8+ Kg1 8.Dh2#
1.f8=S g5 2.Sh7 Kh1 3.Sxg5+ Kg1 4.Sh3+ Kh1 5.Sxf2+ Kg1 6.Sh3+ Kh1 7.Sg5+ Kg1 8.Sxf3#
Two very different solutions (2021-07-17)
James Malcom: See P1401781 for an improvement. (2022-06-12)
comment
Keywords: Promotion, Promotion key (D,S), Stalemate avoidance, Switchback (T), Superseded by (P1401781)
Computer test: Gustav 4.1d, Brute Force Popeye 4.61
FEN: 7R/5P2/6p1/8/6P1/4ppp1/4prp1/4Kbk1
Input: James Malcom, 2021-07-17
Last update: A.Buchanan, 2022-06-13 more...
Computer test: Gustav 4.1d, Brute Force Popeye 4.61
FEN: 7R/5P2/6p1/8/6P1/4ppp1/4prp1/4Kbk1
Input: James Malcom, 2021-07-17
Last update: A.Buchanan, 2022-06-13 more...
51 - P1393307
James Malcom
1627 Julias Fairies 22/06/2021
(13+14) C+
BP in 18.0 (-:
Dummy Pawn Promotion
James Malcom
1627 Julias Fairies 22/06/2021
(13+14) C+
BP in 18.0 (-:
Dummy Pawn Promotion
1. a4 f5 2. Ta3 f4 3. Th3 f3 4. g3 fxe2 5. Lg2 exd1=B 6. Lc6 dxc6 7. Ke2 Lg4+ 8. Ke3 e6 9. Se2 Lb4 10. Txd1 Lc3 11. dxc3 Sf6 12. Td5 Tf8 13. Ta5 Tf7 14. Ta6 Td7 15. a5 Td1 16. Ld2 Tg1 17. Le1 Tg2 18. Sd2 Dd3+
Henrik Juel: What is the (-: trick, James? (2021-08-30)
James Malcom: Nothing special; merely the usual. (2021-08-30)
Henrik Juel: Ah, the old dummy pawn...
Why not spell it out in the stipulation? Not everybody knows 'the usual', and I had forgotten all about it (2021-08-30)
James Malcom: Done! (2021-08-31)
comment
James Malcom: Nothing special; merely the usual. (2021-08-30)
Henrik Juel: Ah, the old dummy pawn...
Why not spell it out in the stipulation? Not everybody knows 'the usual', and I had forgotten all about it (2021-08-30)
James Malcom: Done! (2021-08-31)
comment
Keywords: Dummy Pawn, Move Length Record, Schnoebelen Theme, Golden Age (Dummy Pawn), Prentos Theme (B), Ceriani-Frolkin Theme (B), Unique Proof Game
Genre: Retro
Computer test: Jacobi v0.7.5 in 24 hours by Michael Caullaud
FEN: rn2k3/ppp3pp/R1p1pn2/P7/6b1/2PqK1PR/1PPNNPrP/4B3
Input: James Malcom, 2021-08-30
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro
Computer test: Jacobi v0.7.5 in 24 hours by Michael Caullaud
FEN: rn2k3/ppp3pp/R1p1pn2/P7/6b1/2PqK1PR/1PPNNPrP/4B3
Input: James Malcom, 2021-08-30
Last update: A.Buchanan, 2023-08-04 more...
52 - P1393313
Michel Caillaud
James Malcom
1639 Julias Fairies 07/30/2021
(14+13) C+
BP in 11.0
Dummy Pawn Promotion & Royal Dynasty
Michel Caillaud
James Malcom
1639 Julias Fairies 07/30/2021
(14+13) C+
BP in 11.0
Dummy Pawn Promotion & Royal Dynasty
1. d4 a5 2. d5 a4 3. d6 a3 4. dxe7 Ta4 5. exf8=B Dh4 6. g4 Ke7 7. g5 Ke6 8. g6 Se7 9. gxh7 Txf8 10. h8=K Tg4 11. f4 Dxh8
2 “special” Schnoebelen promotions in a single line
2 “special” Schnoebelen promotions in a single line
Henrik Juel: Definition of the Royal Dynasty condition from Schwalbe
Königsdynastie: Im Diagramm kann jede Partei keinen, einen oder mehrere Könige haben. Ein König ist genau dann königlich, wenn er der einzige König seiner Partei ist. Eine Bauernumwandlung in einen König (derselben Partei) ist erlaubt. Ein König darf nur dann rochieren, wenn er königlich ist und nicht gezogen hat, seit er zuletzt königlich wurde. Die anderen für die Rochade vorgeschriebenen Bedingungen bestehen weiter.
In this problem 10.h8=K makes both white kings non-royal, so 11.f4 is not an illegal self-check
The black king is royal throughout, so 5.exf8=KDTLS? would have given a disturbing check to him, leaving just 5.e8=B
It is nice that both conditions are invisible in the diagram, but they should be mentioned in the stipulation, I think (2021-08-30)
Henrik Juel: Euclide 1.01 reports no solutions in orthodox chess (2021-08-30)
Henrik Juel: in my first comment you should read 5.exf8=B, of course, not 5.e8=B (2021-08-30)
James Malcom: I forget to add the C+, and thank you for your comments. (2021-08-31)
Henrik Juel: Jacobi 0.7.5 in Heuristic Mode found the solution in 35 seconds
A full test required 917 seconds (2021-08-31)
Henrik Juel: Here is a way to use Jacobi:
1. Open the homepage https://wismuth.com/jacobi/latest/solver.html
2. Copy the following two lines to the rectangle for Text representation:
stipulation dia11.0 forsyth 1sb2r1q/1pppspp1/4k3/8/5Pr1/p7/PPP1P2P/RSBQKBSR
condition RoyalDynasty PromOnly P S B R Q K
3. Click on 'Set problem from text'
4. Click on Start (with Heuristic Mode marked, if you just want to find the solution)
5. When Jacobi ends, click on the solution to view it in the Game editor
. (2021-08-31)
James Malcom: For those who advocate N for knight, use "EnglishN" to avoid changing the FEN each time. (2021-08-31)
Henrik Juel: That sounds good, James
Exactly how do you do that? Where do you write EnglishN?
There is an output option called English-N, is that it?
Is there a similar trick to use in Popeye? (2021-08-31)
Henrik Juel: This works in Jacobi, but note the s in promonly
englishn
stipulation dia11.0 forsyth 1nb2r1q/1pppnpp1/4k3/8/5Pr1/p7/PPP1P2P/RNBQKBNR
cond RoyalDynasty PromOnly P s B R Q K
And what about Popeye? (2021-08-31)
James Malcom: Popeye is S only as far as I know. (2021-08-31)
comment
Königsdynastie: Im Diagramm kann jede Partei keinen, einen oder mehrere Könige haben. Ein König ist genau dann königlich, wenn er der einzige König seiner Partei ist. Eine Bauernumwandlung in einen König (derselben Partei) ist erlaubt. Ein König darf nur dann rochieren, wenn er königlich ist und nicht gezogen hat, seit er zuletzt königlich wurde. Die anderen für die Rochade vorgeschriebenen Bedingungen bestehen weiter.
In this problem 10.h8=K makes both white kings non-royal, so 11.f4 is not an illegal self-check
The black king is royal throughout, so 5.exf8=KDTLS? would have given a disturbing check to him, leaving just 5.e8=B
It is nice that both conditions are invisible in the diagram, but they should be mentioned in the stipulation, I think (2021-08-30)
Henrik Juel: Euclide 1.01 reports no solutions in orthodox chess (2021-08-30)
Henrik Juel: in my first comment you should read 5.exf8=B, of course, not 5.e8=B (2021-08-30)
James Malcom: I forget to add the C+, and thank you for your comments. (2021-08-31)
Henrik Juel: Jacobi 0.7.5 in Heuristic Mode found the solution in 35 seconds
A full test required 917 seconds (2021-08-31)
Henrik Juel: Here is a way to use Jacobi:
1. Open the homepage https://wismuth.com/jacobi/latest/solver.html
2. Copy the following two lines to the rectangle for Text representation:
stipulation dia11.0 forsyth 1sb2r1q/1pppspp1/4k3/8/5Pr1/p7/PPP1P2P/RSBQKBSR
condition RoyalDynasty PromOnly P S B R Q K
3. Click on 'Set problem from text'
4. Click on Start (with Heuristic Mode marked, if you just want to find the solution)
5. When Jacobi ends, click on the solution to view it in the Game editor
. (2021-08-31)
James Malcom: For those who advocate N for knight, use "EnglishN" to avoid changing the FEN each time. (2021-08-31)
Henrik Juel: That sounds good, James
Exactly how do you do that? Where do you write EnglishN?
There is an output option called English-N, is that it?
Is there a similar trick to use in Popeye? (2021-08-31)
Henrik Juel: This works in Jacobi, but note the s in promonly
englishn
stipulation dia11.0 forsyth 1nb2r1q/1pppnpp1/4k3/8/5Pr1/p7/PPP1P2P/RNBQKBNR
cond RoyalDynasty PromOnly P s B R Q K
And what about Popeye? (2021-08-31)
James Malcom: Popeye is S only as far as I know. (2021-08-31)
comment
Keywords: Dummy Pawn, Royal Dynasty, Promotion (BK), Schnoebelen Theme (BK), Unique Proof Game, Prentos Theme (BK), Ceriani-Frolkin Theme (BK), Golden Age (Dummy Pawn)
Genre: Retro, Fairies
Computer test: Jacobi v0.7.5
FEN: 1nb2r1q/1pppnpp1/4k3/8/5Pr1/p7/PPP1P2P/RNBQKBNR
Input: James Malcom, 2021-08-30
Last update: A.Buchanan, 2023-08-04 more...
Genre: Retro, Fairies
Computer test: Jacobi v0.7.5
FEN: 1nb2r1q/1pppnpp1/4k3/8/5Pr1/p7/PPP1P2P/RNBQKBNR
Input: James Malcom, 2021-08-30
Last update: A.Buchanan, 2023-08-04 more...
1. 0-0-0! a5 2. Kb1 f6 3. Ka1 g4 4. Tb1 g3 5. Lc1 Lf2 6. Ld2+ Lg1 7. Le1 Lf2 8. Lxf2#
54 - P1396159
Tivadar Kardos
James Malcom
Andrew Buchanan
PDB Website 24/11/2021
TK, correction JM & AB
(6+15) C+
h#3
Tivadar Kardos
James Malcom
Andrew Buchanan
PDB Website 24/11/2021
TK, correction JM & AB
(6+15) C+
h#3
1. dxe3ep+ Kxc4 2. Lc3 Sxc2 3. Ta5 axb3#
R: 1. e2-e4 Tf3-d3+ 2. Ke4-d5
See P0003211
Example Proof Game: 1. b3 a5 2. c4 a4 3. Na3 b5 4. d4 c5 5. Bg5 h6 6. f4 hxg5 7. Nf3 gxf4 8. Qd3 bxc4 9. Nc2 axb3 10. Rc1 Bb7 11. Na1 Nf6 12. Rc3 Nh5 13. Qe3 fxe3 14. Nd2 exd2+ 15. Kf2 Nf4 16. Rg1 Nh3+ 17. gxh3 Bh1 18. Rcg3 Ra6 19. Rg6 Rf6+ 20. Ke3 Rh5 21. Bg2 Nc6 22. Be4 Na5 23. Bc2 bxc2 24. R1g4 Rf3+ 25. Ke4 Nb3 26. Rd6 exd6 27. Rf4 Qh4 28. Rg4 Qe1 29. Rf4 Kd8 30. Rg4 Kc7 31. Rf4 Kb6 32. Rg4 Ka5 33. Rf4 Ka4 34. Rg4 Rhf5 35. Rh4 g5 36. Rg4 Bg7 37. Rh4 Be5 38. Rf4 cxd4 39. Rg4 f6 40. Rh4 Qf1 41. Rf4 gxf4 42. Kd5 Rd3+ 43. e4
R: 1. e2-e4 Tf3-d3+ 2. Ke4-d5
See P0003211
Example Proof Game: 1. b3 a5 2. c4 a4 3. Na3 b5 4. d4 c5 5. Bg5 h6 6. f4 hxg5 7. Nf3 gxf4 8. Qd3 bxc4 9. Nc2 axb3 10. Rc1 Bb7 11. Na1 Nf6 12. Rc3 Nh5 13. Qe3 fxe3 14. Nd2 exd2+ 15. Kf2 Nf4 16. Rg1 Nh3+ 17. gxh3 Bh1 18. Rcg3 Ra6 19. Rg6 Rf6+ 20. Ke3 Rh5 21. Bg2 Nc6 22. Be4 Na5 23. Bc2 bxc2 24. R1g4 Rf3+ 25. Ke4 Nb3 26. Rd6 exd6 27. Rf4 Qh4 28. Rg4 Qe1 29. Rf4 Kd8 30. Rg4 Kc7 31. Rf4 Kb6 32. Rg4 Ka5 33. Rf4 Ka4 34. Rg4 Rhf5 35. Rh4 g5 36. Rg4 Bg7 37. Rh4 Be5 38. Rf4 cxd4 39. Rg4 f6 40. Rh4 Qf1 41. Rf4 gxf4 42. Kd5 Rd3+ 43. e4
Henrik Juel: Black pawns captured all 10 missing white men, and White captured g2xSh3
Last move was not e3-e4 (because of the check from Lh1), but e2-e4
HC+ Popeye 4.61 (2021-11-24)
A.Buchanan: I’d like to claim that Popeye + Retractor + example proof game means this problem is C+. If not, what more would be required. (2021-11-24)
Henrik Juel: I guess that suffices (2021-11-24)
comment
Last move was not e3-e4 (because of the check from Lh1), but e2-e4
HC+ Popeye 4.61 (2021-11-24)
A.Buchanan: I’d like to claim that Popeye + Retractor + example proof game means this problem is C+. If not, what more would be required. (2021-11-24)
Henrik Juel: I guess that suffices (2021-11-24)
comment
Keywords: En passant as key, Checking key
Genre: h#, Retro
Computer test: C+ Popeye 4.61 for forward play Retractor 2.0 for retraction Lichess to check demo game
FEN: 8/3p4/3p1p2/3Kbr2/k1ppPp2/1n1r3P/P1pp3P/N4q1b
Input: James Malcom, 2021-11-24
Last update: A.Buchanan, 2023-07-13 more...
Genre: h#, Retro
Computer test: C+ Popeye 4.61 for forward play Retractor 2.0 for retraction Lichess to check demo game
FEN: 8/3p4/3p1p2/3Kbr2/k1ppPp2/1n1r3P/P1pp3P/N4q1b
Input: James Malcom, 2021-11-24
Last update: A.Buchanan, 2023-07-13 more...
SCHRECKE: Die Idee ist als Miniatur darstellbar!
W: Kh4,Ta1,Ld1,Sg1 (4) - S: Kh2,Be2,Bf2 (3)
Lösung: 1.e1B Lf3 2.f:g1B Ta2# (2022-01-25)
more ...
comment
W: Kh4,Ta1,Ld1,Sg1 (4) - S: Kh2,Be2,Bf2 (3)
Lösung: 1.e1B Lf3 2.f:g1B Ta2# (2022-01-25)
more ...
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...
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...
56 - P1398666
James Malcom
Michael Schreckenbach
Andrew Buchanan
PDB Website 26/01/2022
(4+3) C+
h#2 (-:
James Malcom
Michael Schreckenbach
Andrew Buchanan
PDB Website 26/01/2022
(4+3) C+
h#2 (-:
1. g1=B Lf3 2. e1=B Te2#
AB: economy record for 2 Dummy Pawns in h#. Miniature. Aimless promotion.
Henrik Juel: wPg3 prevents cooks like 1.Kg1 Kg3 2.e1=DTLSB Txe1# (2022-01-27)
more ...
comment
Henrik Juel: wPg3 prevents cooks like 1.Kg1 Kg3 2.e1=DTLSB Txe1# (2022-01-27)
more ...
comment
Keywords: Dummy Pawn, Golden Age (Dummy Pawn), Miniature, Tempo Move (Promotion)
Genre: h#
Computer test: C+ Popeye 4.79
FEN: 8/8/8/8/4R2K/6P1/4p1pk/7B
Input: A.Buchanan, 2022-01-27
Last update: A.Buchanan, 2023-08-04 more...
Genre: h#
Computer test: C+ Popeye 4.79
FEN: 8/8/8/8/4R2K/6P1/4p1pk/7B
Input: A.Buchanan, 2022-01-27
Last update: A.Buchanan, 2023-08-04 more...
1. a5 gxh3 2. a4 h4 3. a3 h5 4. a2 h6 5. a1=T h7 6. Ta2 h8=D 7. Tc2 Da1#
1. a6 gxh3 2. a5 h4 3. a4 h5 4. a3 h6 5. a2 h7 6. a1=T h8=D 7. Tb1 Dc3#
1. Kc2 gxh3 2. gxh3 g4 3. h2 g5 4. h1=L g6 5. Lf3 g7 6. Lxe2 g8=D 7. Kd3 Db3#
https://www.chess.com/forum/view/more-puzzles/helpmate-3
1. a6 gxh3 2. a5 h4 3. a4 h5 4. a3 h6 5. a2 h7 6. a1=T h8=D 7. Tb1 Dc3#
1. Kc2 gxh3 2. gxh3 g4 3. h2 g5 4. h1=L g6 5. Lf3 g7 6. Lxe2 g8=D 7. Kd3 Db3#
https://www.chess.com/forum/view/more-puzzles/helpmate-3
Yuri Bilokin: you can see 1...gxh3 2.a5 h4 3.a4 h5 4.a3 h6 5.a2 h7 6.a1=R h8=Q 7.Rb1 Qc3# (2022-06-12)
more ...
comment
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...
Computer test: Gustav 4.2a, Brute Force
FEN: 8/p7/8/8/4p1p1/4P1Pp/4P1P1/2k1K3
Input: James Malcom, 2022-02-18
Last update: James Malcom, 2022-06-12 more...
James Malcom: I had a thought looking at this again. Does n7/1P2P3/Q3P3/1r6/N1k1KP2/Pr6/B2p1p2/n7 work to save another piece? (2022-04-02)
A.Buchanan: James, yes your version does save another unit for your lovely idea. Beyond this, a version n7/1P2P3/Q7/Br6/2kPKP2/1r6/B2p1p2/n7 saves another unit, and forces a unique order on the Black promotions too. To avoid distracting unachievable threats, set NoThreat as well as the usual NoShortVariations. Your composition has driven me finally to report a long-standing Olive bug that cruelly punishes we Dummy Pawn enthusiasts: https://github.com/dturevski/olive-gui/issues/54. (2022-04-03)
James Malcom: Thanks for the verification and shaving off a unit, Andrew. (2022-04-03)
more ...
comment
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...
Genre: Fairies, r#
Computer test: Henrik Juel: C+ Popeye 4.87 (2022-04-02)
FEN: n7/1P2P3/Q7/Br6/2kPKP2/1r6/B2p1p2/n7
Input: James Malcom, 2022-04-02
Last update: A.Buchanan, 2023-12-14 more...
1. f8=D! g5 2. Tg8 Kh1 3. Dh6+ Kg1 4. Dxg5 Kh1 5. Dh4+ Kg1 6. Dxg3 Kh1 7. Th8+ Kg1 8. Dh2#
1. f8=L! g5 2. Lh6 Kh2 3. Lxg5+ Kg1 4. Lh6 Kh2 5. Lxe3+ Kg1 6. Lbd4 b2 7. Lxf2+ gxf2+ 8. Lxf2#
1. f8=S! g5 2. Sh7 Kh1 3. Sxg5+ Kg1 4. Sh3+ Kh1 5. Sxf2+ Kg1 6. Sh3+ Kh1 7. Sg5+ Kg1 8. Sxf3#
Improvement upon P1391856
1. f8=L! g5 2. Lh6 Kh2 3. Lxg5+ Kg1 4. Lh6 Kh2 5. Lxe3+ Kg1 6. Lbd4 b2 7. Lxf2+ gxf2+ 8. Lxf2#
1. f8=S! g5 2. Sh7 Kh1 3. Sxg5+ Kg1 4. Sh3+ Kh1 5. Sxf2+ Kg1 6. Sh3+ Kh1 7. Sg5+ Kg1 8. Sxf3#
Improvement upon P1391856
Keywords: Promotion (D,L,S), Promotion key, Stalemate avoidance, Switchback (T)
Computer test: Popeye 4.61
FEN: 7R/5P2/6p1/8/6P1/1p2ppp1/1B2prp1/4Kbk1
Input: James Malcom, 2022-06-11
Last update: James Malcom, 2022-06-12 more...
Computer test: Popeye 4.61
FEN: 7R/5P2/6p1/8/6P1/1p2ppp1/1B2prp1/4Kbk1
Input: James Malcom, 2022-06-11
Last update: James Malcom, 2022-06-12 more...
1. Sh3! g1=T 2. Lxg1 fxg1=T 3. Sxg1 e1=T 4. Sh3 Teg1 5. Sxg1 d1=T 6. Sh3 Tdg1 7. Sxg1 c1=T 8. Sh3 Tcg1 9. Sxg1 b1=T 10. Sh3 Tbg1 11. Sxg1 a1=T 12. Sh3 Tag1 13. Sxg1 d3 14. Sh3 d2 15. Sg5+ Txg5#
SuperProblem 2022 Informal Tourney; Selfmates
http://superproblem.ru/htm/tourneys/annual-it/2022/selfmates_2022.html
Record task of 7 Black rook promotions in a selfmate
Previous record: P1225124
SuperProblem 2022 Informal Tourney; Selfmates
http://superproblem.ru/htm/tourneys/annual-it/2022/selfmates_2022.html
Record task of 7 Black rook promotions in a selfmate
Previous record: P1225124
Henrik Juel: Very impressive, James
Black needs to post a promoted rook on g1 again and again to prevent the threat 2.Sg5+ T7xg5#
A promoted queen does not work, because of 2... Dxg5#
You should label it C+, despite the possible duals in short variations, I think (2023-06-03)
James Malcom: Thanks.
Labeled as intended, now.
This task took over two years to realize: http://superproblem.ru/archive/Labor/Malcom-S.html (2023-06-03)
comment
Black needs to post a promoted rook on g1 again and again to prevent the threat 2.Sg5+ T7xg5#
A promoted queen does not work, because of 2... Dxg5#
You should label it C+, despite the possible duals in short variations, I think (2023-06-03)
James Malcom: Thanks.
Labeled as intended, now.
This task took over two years to realize: http://superproblem.ru/archive/Labor/Malcom-S.html (2023-06-03)
comment
Keywords: Promotion (ttttttt x7), Construction record, Construction task, konsekutive Umwandlungen 7 (ttttttt)
Genre: s#
Computer test: Gustav 4.2b Brute Force "only full length variations"
FEN: 5br1/3Qnkr1/5n1K/3P3P/3pPR2/5P2/pppppppB/6N1
Input: James Malcom, 2023-06-03
Last update: James Malcom, 2023-06-03 more...
Genre: s#
Computer test: Gustav 4.2b Brute Force "only full length variations"
FEN: 5br1/3Qnkr1/5n1K/3P3P/3pPR2/5P2/pppppppB/6N1
Input: James Malcom, 2023-06-03
Last update: James Malcom, 2023-06-03 more...
1. Tg8! (Zugzwang)
1. ... Txg8 2. hxg8
1. ... Tf8 2. gxf8
1. ... Td8 2. cxd8
1. ... Txg8 2. hxg8
1. ... Tf8 2. gxf8
1. ... Td8 2. cxd8
SCHRECKE: Have a look at this: R4q1k/pPP3R1/rp3PKn/p5PQ/P7/8/8/8
s#2, 1. f7! - 6(!) dummy promotions (2023-07-28)
SCHRECKE: In my work a black rook on f8 is better! (2023-07-28)
A.Buchanan: Yes this is a great improvement. I can't see how one might get a 7th (2023-07-28)
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s#2, 1. f7! - 6(!) dummy promotions (2023-07-28)
SCHRECKE: In my work a black rook on f8 is better! (2023-07-28)
A.Buchanan: Yes this is a great improvement. I can't see how one might get a 7th (2023-07-28)
more ...
comment
Keywords: Dummy Pawn, Golden Age (Dummy Pawn), Superseded by (P1411367)
Genre: s#
Computer test: C+, popeye 4.87
FEN: 2b1r2R/1pPpk1PP/1P3pB1/4pK2/4N3/8/8/8
Input: Miguel Ambrona, 2023-07-26
Last update: A.Buchanan, 2023-07-29 more...
Genre: s#
Computer test: C+, popeye 4.87
FEN: 2b1r2R/1pPpk1PP/1P3pB1/4pK2/4N3/8/8/8
Input: Miguel Ambrona, 2023-07-26
Last update: A.Buchanan, 2023-07-29 more...
1. b4 h5 2. b5 h4 3. b6 h3 4. b7 h2 5. b8=B Lxg7#
Keywords: Dummy Pawn, Golden Age (Dummy Pawn), Economy record (dummy pawn excelsior), Excelsior, Non-standard material (TL)
Genre: s#
Computer test: C+ Popeye v4.87
FEN: 2R1R2b/3kp1R1/7p/2P5/8/8/BP6/KB5p
Input: A.Buchanan, 2023-08-08
Last update: A.Buchanan, 2023-12-18 more...
Genre: s#
Computer test: C+ Popeye v4.87
FEN: 2R1R2b/3kp1R1/7p/2P5/8/8/BP6/KB5p
Input: A.Buchanan, 2023-08-08
Last update: A.Buchanan, 2023-12-18 more...
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The problems of this query have been registered by the following contributors:
James Malcom (54)A.Buchanan (7)
Miguel Ambrona (1)
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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