38 problem(s) found in 3594 milliseconds (displaying 38 problem(s)). [COMMENTDATE>=20220810 AND NOT K='Kamikazeschach' AND S='Uralski Problemist'] [download as LaTeX]
1. Lf3 Kf6 2. De5+ Kg6 3. Dg7+ Dxg7#
1. ... Kh6 2. g5+ Kg6 3. Lg4 Dxe8#
1. ... Kh6 2. g5+ Kg6 3. Lg4 Dxe8#
Genre: s#
FEN: B3Q2K/5q2/6k1/8/5PP1/8/8/8
Input: Selbstmatt-Miniaturen/Reflexmatt-Miniaturen, 2004-05-01
Last update: Gerd Wilts, 2004-05-01 more...
1. Le2 Ka1 2. Ta3+ La2 3. Ld2 e3 4. Le1 e4 5. Lc4 e2 6. Lxa2 e3 7. Sb4 d5 8. Tb3 d4 9. Lc3+ dxc3 10. Sxc2+ Kxa2 11. Tb2+ cxb2#
Keywords: Ideal mate, Multiple publication
Genre: s#
FEN: 8/8/3p3B/3Np2B/4p3/4R3/k1p5/1bK5
Reprints: 3251 Shakhmatnaya Kompozitsiya 01-02/2004
Input: Frank Müller, 2004-05-12
Last update: Marcin Banaszek, 2022-08-23 more...
Genre: s#
FEN: 8/8/3p3B/3Np2B/4p3/4R3/k1p5/1bK5
Reprints: 3251 Shakhmatnaya Kompozitsiya 01-02/2004
Input: Frank Müller, 2004-05-12
Last update: Marcin Banaszek, 2022-08-23 more...
3 - P1034320
Otto B. Wurzburg
American Chess Bulletin 1942
Informalturnier 1942
3. ehrende Erwähnung
(5+6) C+
#2
Otto B. Wurzburg
American Chess Bulletin 1942
Informalturnier 1942
3. ehrende Erwähnung
(5+6) C+
#2
1. Kc2! droht 2. Sb3#
1. ... Lf5+ 2. Se4#
1. ... T1g2+ 2. S1e2#
1. ... T5g2+ 2. S3e2#
1. ... Lf5+ 2. Se4#
1. ... T1g2+ 2. S1e2#
1. ... T5g2+ 2. S3e2#
Keywords: Brian Stephenson Collection (19239), Square vacation (Schlüssel), Provoked check, Cross check (dreifach)
Genre: 2#
Computer test: SCHRECKE: popeye 4.89
FEN: 8/8/4p3/4B1r1/1p6/1KN4b/8/k1N2Rr1
Reprints: 159 The American Two-move Chess Problem , p. 72, 1965
Wurzburg Artistry 1974
2345 Chess Problems 1997
The Ural's Problemist 2002
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2024-02-11 more...
Genre: 2#
Computer test: SCHRECKE: popeye 4.89
FEN: 8/8/4p3/4B1r1/1p6/1KN4b/8/k1N2Rr1
Reprints: 159 The American Two-move Chess Problem , p. 72, 1965
Wurzburg Artistry 1974
2345 Chess Problems 1997
The Ural's Problemist 2002
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2024-02-11 more...
1. d3 c6 2. Ld2 Db6 3. La5 Db3 4. axb3 Sf6 5. Ta4 Sd5 6. Th4 Sb6 7. e4 Kd8 8. Ke2 Kc7 9. Kf3 Kd6 10. Kg3 Ke5 11. Dh5+ Ke6 12. Le2 Kd6 13. Dd5+ Kc7 14. Lh5 Kd8 15. Sf3 Ke8 16. Te1 Sc4 17. Te3 Se5 18. Se1 Sg4 19. Tf3 Sh6 20. Tf6 Sg8 21. f3
Rundläufe von sK und sSg8, um ein Tempo zu verlieren.
Rundläufe von sK und sSg8, um ein Tempo zu verlieren.
Keywords: Unique Proof Game, Pure Round Trip (sk), Tempo Loss (k9)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.0 00:46:34 Minuten (hh:mm:ss). Keine Lösung: BP 19.5, BP 20.0.
FEN: rnb1kbnr/pp1ppppp/2p2R2/B2Q3B/4P2R/1P1P1PK1/1PP3PP/1N2N3
Reprints: feenschach 153 10-12/2003
Input: Gerd Wilts, 2005-01-09
Last update: A.Buchanan, 2023-03-02 more...
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.0 00:46:34 Minuten (hh:mm:ss). Keine Lösung: BP 19.5, BP 20.0.
FEN: rnb1kbnr/pp1ppppp/2p2R2/B2Q3B/4P2R/1P1P1PK1/1PP3PP/1N2N3
Reprints: feenschach 153 10-12/2003
Input: Gerd Wilts, 2005-01-09
Last update: A.Buchanan, 2023-03-02 more...
1. Kxe6 Lg1 2. Kd7 Lh2 3. Kc8 Lg1 4. Kb7 Lh2 5. Ka6 Lg1 6. Kb5 Lh2 7. Kc4 Lg1 8. Kxd4 Lh2 9. Kxc5 Lg1 10. d4 Lh2 11. d3 Lg1 12. d2 Lh2 13. d1=S Lg1 14. Sxf2 Sxf2 15. Kd6 Se4+ 16. Ke7 Sf6 17. Kf8 Lc5#
Genre: h#
FEN: 8/2p3p1/2p1RkP1/2Pp2p1/3P2P1/1p3pP1/pP3P1B/K6N
Reprints: 443 The Ural's Problemist 2009
Input: hpr, 2008-10-23
Last update: James Malcom, 2022-09-05 more...
NL:
1. f1=D Ta6 2. Lg1 Tg2+ 3. Kc1 Ta1#
1. Sf4 Ta6 2. f1=S Tg2+ 3. Kc1 Ta1#
1. f1=L Ta6 2. Lg1 Tg2+ 3. Kd1 Ta1#
1. Lxg5+ Kxg5 2. Ke3 Txd6 3. Ke4 Te6#
1. f1=D Ta6 2. Lg1 Tg2+ 3. Kc1 Ta1#
1. Sf4 Ta6 2. f1=S Tg2+ 3. Kc1 Ta1#
1. f1=L Ta6 2. Lg1 Tg2+ 3. Kd1 Ta1#
1. Lxg5+ Kxg5 2. Ke3 Txd6 3. Ke4 Te6#
klären Stellung (Druckfehler), Lösung
Yuri Bilokin: correction +bPa2, +bPh2 8/8/2Rp3K/3n2R1/3p4/3pbb2/p2k1p1p/4n3 (3+11) h#3 3.1…
1.Sg2 Rb6 2.Sgf4 Rg1 3.Sc3 Rb2# (MM)
1.Sf4 Rxd6 2.Kc3 Rb6 3.Bd2 Rc5# (MM)
1.Bxg5+ Kxg5 2.Ke3 Rxd6 3.Ke4 Re6# (MM)
Active sacrifice (black). Anticipatory unpin
AntiZielElement (B1, line obstruction).Bi-valve (bS-wR-bB) × 2. Helledie theme
Hesitation (wR). Kniest theme (white). Many-ways (wR, 2). Wigwag (wR)
Model mate × 3 (2023-05-02)
comment
Yuri Bilokin: correction +bPa2, +bPh2 8/8/2Rp3K/3n2R1/3p4/3pbb2/p2k1p1p/4n3 (3+11) h#3 3.1…
1.Sg2 Rb6 2.Sgf4 Rg1 3.Sc3 Rb2# (MM)
1.Sf4 Rxd6 2.Kc3 Rb6 3.Bd2 Rc5# (MM)
1.Bxg5+ Kxg5 2.Ke3 Rxd6 3.Ke4 Re6# (MM)
Active sacrifice (black). Anticipatory unpin
AntiZielElement (B1, line obstruction).Bi-valve (bS-wR-bB) × 2. Helledie theme
Hesitation (wR). Kniest theme (white). Many-ways (wR, 2). Wigwag (wR)
Model mate × 3 (2023-05-02)
comment
Genre: h#
FEN: 8/8/2Rp3K/3n2R1/3p4/3pbb2/3k1p2/4n3
Input: hpr, 2008-10-23
Last update: hpr, 2008-10-23 more...
1) 1. Kc4 Lxc6 2. Kd3 Lf3 3. Tc4 0-0-0#
2) 1. c5 Ld5 2. cxb4 La2 3. Ka4 Lc4#
NL:
1. Kxb4 Lxc6 2. Kb3 Tb1+ 3. Kc2 Le4#
1. c5 bxc5 2. Kc4 Ta4+ 3. Kd3 Le4#
2) 1. c5 Ld5 2. cxb4 La2 3. Ka4 Lc4#
NL:
1. Kxb4 Lxc6 2. Kb3 Tb1+ 3. Kc2 Le4#
1. c5 bxc5 2. Kc4 Ta4+ 3. Kd3 Le4#
klären NL
Yuri Bilokin: correction Yuri Bilokin & Alexandr I. Shuk bRc7-h5, bPc6-f5, +bBg8, +bNc6, +bPg6
4B1b1/8/2n3p1/1k3p1r/1P6/2p1p3/8/R3K3 (4+8) h#3 3.1…
1.Bb3 Rd1 2.Ka4 Rd7 3.Sxb4 Ra7# (MM)
1.Rh4 Bf7 2.Rxb4 Ba2 3.Ka4 Bc4# (MM)
1.Kc4 Bxc6 2.Kd3 Bf3 3.Bc4 0-0-0#
AntiZielElement (W2, indirect guard). Bi-valve (wB-wR-bB)
Castling (white, long). Hesitation (wB).Long-trip (wB, 3). Long-trip (wR, 3)
Reciprocal batteries
Model mate × 2. Battery mate × 3. Royal battery mate. Double-check mate (2024-03-09)
A.Buchanan: Possible to remove another piece in the correction: -bPg6, shift bBg8 to f7
4B3/5b2/2n5/1k3p1r/1P6/2p1p3/8/R3K3 (2024-03-10)
Yuri Bilokin: Thank you. Due to the taking of a black figure, this version was not taken into account. (2024-03-10)
more ...
comment
Yuri Bilokin: correction Yuri Bilokin & Alexandr I. Shuk bRc7-h5, bPc6-f5, +bBg8, +bNc6, +bPg6
4B1b1/8/2n3p1/1k3p1r/1P6/2p1p3/8/R3K3 (4+8) h#3 3.1…
1.Bb3 Rd1 2.Ka4 Rd7 3.Sxb4 Ra7# (MM)
1.Rh4 Bf7 2.Rxb4 Ba2 3.Ka4 Bc4# (MM)
1.Kc4 Bxc6 2.Kd3 Bf3 3.Bc4 0-0-0#
AntiZielElement (W2, indirect guard). Bi-valve (wB-wR-bB)
Castling (white, long). Hesitation (wB).Long-trip (wB, 3). Long-trip (wR, 3)
Reciprocal batteries
Model mate × 2. Battery mate × 3. Royal battery mate. Double-check mate (2024-03-09)
A.Buchanan: Possible to remove another piece in the correction: -bPg6, shift bBg8 to f7
4B3/5b2/2n5/1k3p1r/1P6/2p1p3/8/R3K3 (2024-03-10)
Yuri Bilokin: Thank you. Due to the taking of a black figure, this version was not taken into account. (2024-03-10)
more ...
comment
Genre: h#
FEN: B7/2r5/2p5/1k6/1P6/2p1p3/8/R3K3
Input: hpr, 2008-10-24
Last update: A.Buchanan, 2024-03-10 more...
1. Le4? Kc8 2. Lf2 gxf2# AC, aber 1. ... Ke6! a
1. Lg6? Ke6 2. Lf2 gxf2# BC, aber 1. ... Kc8! b
1. Lf2! Kc8 2. Le4 gxf2# CbA
1. Lf2! Ke6 2. Lg6 gxf2# Ca=B
1. Lg6? Ke6 2. Lf2 gxf2# BC, aber 1. ... Kc8! b
1. Lf2! Kc8 2. Le4 gxf2# CbA
1. Lf2! Ke6 2. Lg6 gxf2# Ca=B
Keywords: half-battery, white
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 4N3/2Pk1P2/5P2/2R5/3B2n1/3B2pQ/6p1/3R2Kb
Input: Frank Müller, 2009-07-17
Last update: Dieter Berlin, 2023-12-16 more...
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 4N3/2Pk1P2/5P2/2R5/3B2n1/3B2pQ/6p1/3R2Kb
Input: Frank Müller, 2009-07-17
Last update: Dieter Berlin, 2023-12-16 more...
1. Sc1! Ke8 2. Sb3 Kd8 3. Sa1 Ke8 4. Sc2 Kd8 5. Sa3 Ke8 6. Sb5 Kd8 7. Dd5+ Ke8! 8. Dc6+ Kd8 9. Db7 Ke8 10. Sd6+ Kd8 11. Sxf7+ Ke8 12. Dc6+ Lxc6#
Quelle schreibt A. Almammadow
Quelle schreibt A. Almammadow
Genre: s#
FEN: b2k2B1/1Q3pP1/5P2/P7/8/3P4/4N2P/6BK
Input: Frank Müller, 2009-09-29
Last update: Marcin Banaszek, 2023-02-07 more...
1. c4 e3 2. c5 e4 3. c6 e5 4. c7 h4 5. c8=S h5 6. Sd6 h3 7. Sxe4 h4 8. Sg5 e4 9. Sxh3#
Keywords: Alleinunterhalter, Minimal
Genre: n#
FEN: 8/8/4p2p/4p2p/4p3/5pp1/2P1prrb/4Kbkq
Input: Frank Müller, 2009-09-29
Last update: Frank Müller, 2009-09-29 more...
Genre: n#
FEN: 8/8/4p2p/4p2p/4p3/5pp1/2P1prrb/4Kbkq
Input: Frank Müller, 2009-09-29
Last update: Frank Müller, 2009-09-29 more...
1. e7! droht 2. Tf5+ Kd6 3. e8=L+ Ke6 4. Ld7+ Lxd7#
1. ... d2 2. Tb5+ Kd6 3. e8=S+ Ke6 4. Db3+ Lxb3#
1. ... Dxf7 2. Tc5+ Kd6 3. e8=D+ De7,Dxf8 4. Dd7+ Lxd7#
1. ... gxf6 2. Td6+ Kxd6 3. e8=T+ Kd7 4. Lc6+ Lxc6#
1. ... d2 2. Tb5+ Kd6 3. e8=S+ Ke6 4. Db3+ Lxb3#
1. ... Dxf7 2. Tc5+ Kd6 3. e8=D+ De7,Dxf8 4. Dd7+ Lxd7#
1. ... gxf6 2. Td6+ Kxd6 3. e8=T+ Kd7 4. Lc6+ Lxc6#
Erich Bartel: Nachdruck:
1) 49 The Ural's Problemist (58) 2009 (2009-10-03)
Gunter Jordan: 1. .. Dxh8 verhindert auch die Drohung, denn 2.Tf5+ Kd6 3.e8L+? Dxf8! oder 3. .. Ke6 4.Ld7+ Kxf7!
Diese S1-Verteidigung (vollzügige Nebenvariante) ist trialistisch:
1. .. Dxh8 2.Tc5+ Kd6 3.e8D+ Dxf8 4.Dd7+ Lxd7#
1. .. Dxh8 2.Tf5+,Txg5+ Kd6 3.e8D+ Dxf8 4.Dd7+ Lxd7#
Ein zusätzlicher sBh7, den die Stellung noch verträgt, würde dies m. E. beheben und den leichten Schatten von dieser genialen Aufgabe (11,5 Album-Punkte) verschwinden lassen. (2024-01-28)
comment
1) 49 The Ural's Problemist (58) 2009 (2009-10-03)
Gunter Jordan: 1. .. Dxh8 verhindert auch die Drohung, denn 2.Tf5+ Kd6 3.e8L+? Dxf8! oder 3. .. Ke6 4.Ld7+ Kxf7!
Diese S1-Verteidigung (vollzügige Nebenvariante) ist trialistisch:
1. .. Dxh8 2.Tc5+ Kd6 3.e8D+ Dxf8 4.Dd7+ Lxd7#
1. .. Dxh8 2.Tf5+,Txg5+ Kd6 3.e8D+ Dxf8 4.Dd7+ Lxd7#
Ein zusätzlicher sBh7, den die Stellung noch verträgt, würde dies m. E. beheben und den leichten Schatten von dieser genialen Aufgabe (11,5 Album-Punkte) verschwinden lassen. (2024-01-28)
comment
Keywords: Allumwandlung, differenzierte Batterieabzüge, Exchange of Promotions
Genre: s#
FEN: 5B1N/Rp3Pp1/1Pk1PN2/K2R2pq/bP1pBpr1/3p1Q2/rp6/8
Reprints: 1456 Pat a Mat 69 12/2009
F129 FIDE Album 2007-2009 2015
Input: Frank Müller, 2009-09-29
Last update: Marcin Banaszek, 2021-04-04 more...
Genre: s#
FEN: 5B1N/Rp3Pp1/1Pk1PN2/K2R2pq/bP1pBpr1/3p1Q2/rp6/8
Reprints: 1456 Pat a Mat 69 12/2009
F129 FIDE Album 2007-2009 2015
Input: Frank Müller, 2009-09-29
Last update: Marcin Banaszek, 2021-04-04 more...
12 - P1121230
Eligiusz Zimmer
The Ural's Problemist 45 01/2006
Ljaljuschkin-70 6. ehr. Erw.
(4+2)
#3
Eligiusz Zimmer
The Ural's Problemist 45 01/2006
Ljaljuschkin-70 6. ehr. Erw.
(4+2)
#3
1. Sa7 b4 (1... Ka4 2. Db2) 2. Sc6
Keywords: Miniature Collection (0339451)
Genre: 3#
FEN: K1N5/8/8/1p1P4/8/k7/8/1Q6
Input: Felber, Volker, 2010-09-11
Last update: Felber, Volker, 2010-09-11 more...
Genre: 3#
FEN: K1N5/8/8/1p1P4/8/k7/8/1Q6
Input: Felber, Volker, 2010-09-11
Last update: Felber, Volker, 2010-09-11 more...
1. Ke2 Kf4 (1... h4 2. Tg5 Kf4 3. Tg4#) 2. Txh5
Keywords: Miniature Collection (0339345)
Genre: 3#
FEN: 8/8/8/3R3p/4k3/4N3/p4K2/B7
Input: Felber, Volker, 2010-09-12
Last update: Felber, Volker, 2010-09-12 more...
Genre: 3#
FEN: 8/8/8/3R3p/4k3/4N3/p4K2/B7
Input: Felber, Volker, 2010-09-12
Last update: Felber, Volker, 2010-09-12 more...
1. Dd8+ Dg8 2. Dd7 Df8+ 3. Kg6 Dg8+ 4. Dg7+ Dxg7+ 5. fxg7+ Kg8 6. Kf6 Kh7 7. Kf7 Kh6 8. g8=D Kh5 9. Dg5#
Keywords: Miniature Collection (0339648)
Genre: n#
FEN: 7k/4Qq2/5P1K/8/7B/8/8/8
Input: Felber, Volker, 2010-09-12
Last update: Felber, Volker, 2010-09-12 more...
Genre: n#
FEN: 7k/4Qq2/5P1K/8/7B/8/8/8
Input: Felber, Volker, 2010-09-12
Last update: Felber, Volker, 2010-09-12 more...
15 - P1187571
Valery Kirillov
Vladimir I. Zheltonozhko
The Ural's Problemist 1993
Bogoslowski aljuminijewy sawod 50 JT
3. Preis
(10+6) C+
s#2
Valery Kirillov
Vladimir I. Zheltonozhko
The Ural's Problemist 1993
Bogoslowski aljuminijewy sawod 50 JT
3. Preis
(10+6) C+
s#2
1. Da4? gxf5 a 2. Tgxf3+ A Lxf3#
1. Da4? hxg3 b 2. Tfxf3+ B Lxf3#
1. Da4? Lg4!
1. Tg1? Lxg4 c 2. Tfxf3+ B Lxf3#
1. Tg1? gxf5 a 2. Dxf3+ C Lxf3#
1. Tg1? f2!
1. Td5! hxg3 b 2. Dxf3+ C Lxf3#
1. Td5! Lxg4 c 2. Tgxf3+ A Lxf3#
1. Da4? hxg3 b 2. Tfxf3+ B Lxf3#
1. Da4? Lg4!
1. Tg1? Lxg4 c 2. Tfxf3+ B Lxf3#
1. Tg1? gxf5 a 2. Dxf3+ C Lxf3#
1. Tg1? f2!
1. Td5! hxg3 b 2. Dxf3+ C Lxf3#
1. Td5! Lxg4 c 2. Tgxf3+ A Lxf3#
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 8/8/2N3p1/2N2RPb/6Qp/BPk2pRP/3p4/3K4
Input: Frank Müller, 2011-02-19
Last update: Dieter Berlin, 2024-02-10 more...
16 - P1187575
Volodymyr Chornous
Stepan P. Tsyrulik
The Ural's Problemist 1993
Bogoslowski aljuminijewy sawod 50 JT
4. ehrende Erwähnung
(7+5)
s#2
Volodymyr Chornous
Stepan P. Tsyrulik
The Ural's Problemist 1993
Bogoslowski aljuminijewy sawod 50 JT
4. ehrende Erwähnung
(7+5)
s#2
1. Se4? Sb5 2. Lxb5 Kxg4#
1. Se4? Sc6 2. Lxc6 Kxg4#
1. Se4? Sc8!
1. Se6! Sb5 2. Dxb5 Kxg4#
1. Se6! Sc6 2. Dxc6 Kxg4#
1. Se6! Sc8 2. Dxc8 Kxg4#
1. Se4? Sc6 2. Lxc6 Kxg4#
1. Se4? Sc8!
1. Se6! Sb5 2. Dxb5 Kxg4#
1. Se6! Sc6 2. Dxc6 Kxg4#
1. Se6! Sc8 2. Dxc8 Kxg4#
1. Sb5 c5,cxb5 2. Dc8+ Kxc8#
1. Sb5 Kxa6 2. Dxc6+ Lxc6#
1. Sb5 Kxa6 2. Dxc6+ Lxc6#
Keywords: half-battery, black
Genre: s#
FEN: b7/1kN5/N1p1Q3/P7/1P6/8/7P/6BK
Input: Frank Müller, 2011-02-19
Last update: Frank Müller, 2011-02-19 more...
Genre: s#
FEN: b7/1kN5/N1p1Q3/P7/1P6/8/7P/6BK
Input: Frank Müller, 2011-02-19
Last update: Frank Müller, 2011-02-19 more...
1. Dg8 Lc8 2. Sd7+ Lxd7 3. Dd5+ cxd5#
1. Dg8 Lb7 2. Db8 La8,Lc8 3. Db5+ cxb5#
1. Dg8 Lb7 2. Db8 La8,Lc8 3. Db5+ cxb5#
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 8/2B5/b1p1QN2/2k5/K1n1P3/1P2P3/8/2R5
Input: Frank Müller, 2011-02-19
Last update: Dieter Berlin, 2023-11-11 more...
1. h8=T! Te4 2. Scxd4+ Lxd4#
1. ... Tf4 2. Sfxd4+ Lxd4#
1. ... Tg4 2. Dh5 Lf2,Le3#
1. ... Th5 2. Txh5 Lf2,Le3#
1. ... Th6 2. Txh6 Lf2,Le3#
1. ... Th7 2. Txh7 Lf2,Le3#
1. ... Txh8 2. Txh8 Lf2,Le3#
1. ... Tf4 2. Sfxd4+ Lxd4#
1. ... Tg4 2. Dh5 Lf2,Le3#
1. ... Th5 2. Txh5 Lf2,Le3#
1. ... Th6 2. Txh6 Lf2,Le3#
1. ... Th7 2. Txh7 Lf2,Le3#
1. ... Txh8 2. Txh8 Lf2,Le3#
Keywords: under-promotion key (T)
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 5R2/1Bp4P/2N3Q1/5N2/3p3r/3P1kPp/3P3p/5Kbr
Input: Frank Müller, 2011-02-19
Last update: Dieter Berlin, 2024-03-18 more...
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 5R2/1Bp4P/2N3Q1/5N2/3p3r/3P1kPp/3P3p/5Kbr
Input: Frank Müller, 2011-02-19
Last update: Dieter Berlin, 2024-03-18 more...
1. Lg5! Lxa8 2. Txa8 d2#
1. Lg5 Lb7 2. Dxb7 d2#
1. Lg5 Lc6 2. Dxc6 d2#
1. Lg5 Lc4 2. Lxc4 d2#
1. Lg5 Lb7 2. Dxb7 d2#
1. Lg5 Lc6 2. Dxc6 d2#
1. Lg5 Lc4 2. Lxc4 d2#
21 - P1187625
Vladimir I. Zheltonozhko
Valery Kirillov
Andrey Selivanov
Evgeny Fomichev
The Ural's Problemist 10-12/1997
A. Koslow 100 MT
1. Preis
(14+10) C+
s#5
Vladimir I. Zheltonozhko
Valery Kirillov
Andrey Selivanov
Evgeny Fomichev
The Ural's Problemist 10-12/1997
A. Koslow 100 MT
1. Preis
(14+10) C+
s#5
1. Sh6 droht 2. Sd5+ cxd5 3. Ld2+ Kxe5 4. Lf4+ Kxf4 5. Dxf6+ Lxf6#
1. Sh6 e1=D 2. Td4+ Kxe5 3. Tg4+ Dxc3 4. De7+ Lxe7 5. Te4+ Sxe4#
1. Sh6 cxb5 2. Sg2+ Ke4 3. Dxg6+ Lxg6 4. Se3+ Kf4 5. Sd5+ Sxd5#
1. Sh6 Sd7 2. Td4+ Kxe5 3. Td5+ Kf4 4. Le5+ Sxe5 5. Dxf6+ Lxf6#
1. Sh6 e1=T 2. Sd5+ cxd5 3. Ld2+ Te3 4. Td4+ Kxe5 5. Dxd5+ Sxd5#
1. Sh6 e1=D 2. Td4+ Kxe5 3. Tg4+ Dxc3 4. De7+ Lxe7 5. Te4+ Sxe4#
1. Sh6 cxb5 2. Sg2+ Ke4 3. Dxg6+ Lxg6 4. Se3+ Kf4 5. Sd5+ Sxd5#
1. Sh6 Sd7 2. Td4+ Kxe5 3. Td5+ Kf4 4. Le5+ Sxe5 5. Dxf6+ Lxf6#
1. Sh6 e1=T 2. Sd5+ cxd5 3. Ld2+ Te3 4. Td4+ Kxe5 5. Dxd5+ Sxd5#
Genre: s#
Computer test: A. Baumann: Gustav 4.2a
FEN: 1n1b4/2p2Q1b/2p2np1/1PP1P2p/2P2kNK/2BRN2P/2P1pP2/7B
Input: Frank Müller, 2011-02-19
Last update: Dieter Berlin, 2023-12-08 more...
1. Tfg4? h1=L 2. Df3+ Lxf3#
1. Tfg4? h1=S 2. Dh3 Sxf2#, aber 1. ... gxf2!
1. Dh3! h1=L 2. Tf3+ Lxf3#
1. Dh3! h1=S 2. Tfg4 Sxf2#
1. Dh3! h1=D+ 2. Df1+ Dxf1#
1. Tfg4? h1=S 2. Dh3 Sxf2#, aber 1. ... gxf2!
1. Dh3! h1=L 2. Tf3+ Lxf3#
1. Dh3! h1=S 2. Tfg4 Sxf2#
1. Dh3! h1=D+ 2. Df1+ Dxf1#
Keywords: Changed continuation, under-promotion B/S
Genre: s#
FEN: 8/8/8/1N6/4PR1R/1P1k2p1/3p1PQp/3K4
Input: Frank Müller, 2011-02-19
Last update: Frank Müller, 2011-02-19 more...
Genre: s#
FEN: 8/8/8/1N6/4PR1R/1P1k2p1/3p1PQp/3K4
Input: Frank Müller, 2011-02-19
Last update: Frank Müller, 2011-02-19 more...
a) 1. Th1 Tg8 2. Kh2 Lb8 3. h3 Lxc7#
b) 1. Kf3 bxc7 2. Kg2 Tg8+ 3. Kh1 Tg1#
NL:
a) 1. Te2 bxc7 2. Kg2 Tg8+ 3. Kf1 Tg1#
a) 1. Ta2 Tg8 2. Tf2 bxc7 3. Th2 c8=D#
b) 1. Kf4 bxc7 2. Kg3 Tg8+ 3. Kh3 c8=D#
b) 1. Kf3 bxc7 2. Kg2 Tg8+ 3. Kh1 Tg1#
NL:
a) 1. Te2 bxc7 2. Kg2 Tg8+ 3. Kf1 Tg1#
a) 1. Ta2 Tg8 2. Tf2 bxc7 3. Th2 c8=D#
b) 1. Kf4 bxc7 2. Kg3 Tg8+ 3. Kh3 c8=D#
Yuri Bilokin: redaction Yuri Bilokin
Aleksandr G. Zhuk
wKb7-a8, wRb8-a5, wBa7-b6(-wPa6), -bBc7, +bPa4, +bPb5, +bPc4, +bPc5 K7/8/1B6/Rpp5/p1p4p/7k/7r/8 (3+7) h#3 2.1…
1.b4 Rxc5 2.Kg2 Rg5+ 3.Kh1 Rg1#
1.Rh1 Ra7 2.Kh2 Rg7 3.h3 Bc7#
Place exchange in the final positions (black, kr) (2023-01-03)
comment
Aleksandr G. Zhuk
wKb7-a8, wRb8-a5, wBa7-b6(-wPa6), -bBc7, +bPa4, +bPb5, +bPc4, +bPc5 K7/8/1B6/Rpp5/p1p4p/7k/7r/8 (3+7) h#3 2.1…
1.b4 Rxc5 2.Kg2 Rg5+ 3.Kh1 Rg1#
1.Rh1 Ra7 2.Kh2 Rg7 3.h3 Bc7#
Place exchange in the final positions (black, kr) (2023-01-03)
comment
Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
FEN: 1R6/BKb5/1P6/8/7p/7k/7r/8
Input: hpr, 2011-12-20
Last update: hpr, 2011-12-20 more...
1. f7! droht 2. Dg7+ Lxg7#
1. f7 Sf6 2. De8+ Sxe8#
1. f7 Sxe5 2. Sg6+ Sxg6#
1. f7 Td4 2. Dd6+ Txd6#
1. f7 Tc3 2. Dxc5+ Txc5#
1. f7 Tb2 2. Db8+ Txb8#
1. f7 Sf6 2. De8+ Sxe8#
1. f7 Sxe5 2. Sg6+ Sxg6#
1. f7 Td4 2. Dd6+ Txd6#
1. f7 Tc3 2. Dxc5+ Txc5#
1. f7 Tb2 2. Db8+ Txb8#
Keywords: dentist theme
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 5k1K/R6P/p4P2/2p1Q3/r4Nn1/8/2r5/b7
Input: Frank Müller, 2013-03-31
Last update: Dieter Berlin, 2023-11-27 more...
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 5k1K/R6P/p4P2/2p1Q3/r4Nn1/8/2r5/b7
Input: Frank Müller, 2013-03-31
Last update: Dieter Berlin, 2023-11-27 more...
1. Tg6! fxe6 2. Le5 g1=D#
1. Tg6 fxg6 2. hxg6 g1=D#
1. Tg6 f6 2. Lxf6 g1=D#
1. Tg6 f5 2. gxf5 g1=D#
1. Tg6 fxg6 2. hxg6 g1=D#
1. Tg6 f6 2. Lxf6 g1=D#
1. Tg6 f5 2. gxf5 g1=D#
Keywords: Pickaninny, Sacrifice key, discovered checkmate
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: K1k2N2/P1P2pBQ/4NR2/7P/6P1/6P1/6pP/7b
Input: Frank Müller, 2013-03-31
Last update: Dieter Berlin, 2024-02-16 more...
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: K1k2N2/P1P2pBQ/4NR2/7P/6P1/6P1/6pP/7b
Input: Frank Müller, 2013-03-31
Last update: Dieter Berlin, 2024-02-16 more...
1. Sf3 e2 2. Sd4 e1=D+ 3. Dc1+ Dxc1#
1. Sf3 e2 2. Sd4 e1=T+ 3. Dc1+ Txc1# keine Differenzierung
1. Sf3 e2 2. Sd4 e1=L 3. Txc3+ Lxc3#
1. Sf3 e2 2. Sd4 e1=S 3. Sc2+ Sxc2#
1. Sf3 e2 2. Sd4 e1=T+ 3. Dc1+ Txc1# keine Differenzierung
1. Sf3 e2 2. Sd4 e1=L 3. Txc3+ Lxc3#
1. Sf3 e2 2. Sd4 e1=S 3. Sc2+ Sxc2#
Keywords: Allumwandlung, unechte schwarze
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 5BB1/8/7Q/6N1/pn6/k1pRp3/p7/K7
Input: Frank Müller, 2013-03-31
Last update: Dieter Berlin, 2023-11-19 more...
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 5BB1/8/7Q/6N1/pn6/k1pRp3/p7/K7
Input: Frank Müller, 2013-03-31
Last update: Dieter Berlin, 2023-11-19 more...
1. Dd8 a1=L 2. Df6+ Lxf6 3. Sh4+ Lxh4#
1. Dd8 a1=S 2. Dh4 Sb3 3. Df2+ exf2#
1. Dd8 a1=S 2. Dh4 Sb3 3. Df2+ exf2#
Keywords: under-promotion B/S
Genre: s#
FEN: 6Q1/8/6N1/3N4/8/3Ppk1B/p3p2P/4K3
Input: Frank Müller, 2013-03-31
Last update: Frank Müller, 2013-03-31 more...
Genre: s#
FEN: 6Q1/8/6N1/3N4/8/3Ppk1B/p3p2P/4K3
Input: Frank Müller, 2013-03-31
Last update: Frank Müller, 2013-03-31 more...
1. c4+ Ke6 2. Tf2 Th1#
1. c4+ Ke4 2. Df2 Th1#
1. c4+ Ke4 2. Df2 Th1#
Keywords: changed blocks
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 8/2R5/8/1N1k1p2/1p3P1Q/1PP2R1p/2P3pr/6K1
Input: Frank Müller, 2013-03-31
Last update: Dieter Berlin, 2024-01-16 more...
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 8/2R5/8/1N1k1p2/1p3P1Q/1PP2R1p/2P3pr/6K1
Input: Frank Müller, 2013-03-31
Last update: Dieter Berlin, 2024-01-16 more...
1. Lf4 b6 2. Le3 Ke5 3. Lxb6+ Kf6 4. Le3 Ke5 5. Lh6+ Kf6 6. Tc1 Ke5 7. Tc5+ Kf6 8. Tcc8 Ke5 9. Tce8+ Kf6 10. Se6 Ke5 11. Sf4+ Kf6 12. Tec8 Ke5 13. Tc5+ Kf6 14. Tc1 Ke5 15. Te1+ Kf6 16. Le4 Ke5 17. Lxd3+ Kf6 18. Le2 Ke5 19. Lxb5+ Kf6 20. Ke8 Lxb5#
Cook: Nebenlösung in 4 Zügen (!)
1. Ke8 b6 2. Le4 Ke5 3. Lc6+ Kf6 4. Lxb5 Lxb5#
Cook: Nebenlösung in 4 Zügen (!)
1. Ke8 b6 2. Le4 Ke5 3. Lc6+ Kf6 4. Lxb5 Lxb5#
Keywords: Battery play, Hauptplan
Genre: s#
FEN: 5R2/1p1K1nN1/5k1B/1p3N1P/bP4P1/1p1p1Bp1/1P1P2P1/4R3
Input: Frank Müller, 2013-03-31
Last update: A.Buchanan, 2022-09-02 more...
Genre: s#
FEN: 5R2/1p1K1nN1/5k1B/1p3N1P/bP4P1/1p1p1Bp1/1P1P2P1/4R3
Input: Frank Müller, 2013-03-31
Last update: A.Buchanan, 2022-09-02 more...
1. Sh5! droht 2. De4+ fxe4#
1. Sh5 f4 2. Lxc4+ bxc4#
1. Sh5 Le5 2. e4+ fxe4#
1. Sh5 Sxe2 2. Sf4+ Sxf4#
1. Sh5 f4 2. Lxc4+ bxc4#
1. Sh5 Le5 2. e4+ fxe4#
1. Sh5 Sxe2 2. Sf4+ Sxf4#
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 4Q2b/8/3p4/1ppk1p2/2n5/1BpK2N1/2P1P3/6n1
Input: Frank Müller, 2013-04-28
Last update: Dieter Berlin, 2024-01-17 more...
1. Dg6 droht 2. Txf2+ gxf2 3. Dg2+ hxg2#
1. Dg6 Tg5 2. De4+ Sxe4 3. Sd2+ Sxd2#
1. Dg6 Tf5 2. Dg4+ Sxg4 3. Te3+ Sxe3#
1. Dg6 Sg4 2. Dc6+ Td5 3. Te3+ Sxe3#
1. Dg6 Se4 2. Dh5+ Txh5 3. Sd2+ Sxd2#
1. Dg6 Tg5 2. De4+ Sxe4 3. Sd2+ Sxd2#
1. Dg6 Tf5 2. Dg4+ Sxg4 3. Te3+ Sxe3#
1. Dg6 Sg4 2. Dc6+ Td5 3. Te3+ Sxe3#
1. Dg6 Se4 2. Dh5+ Txh5 3. Sd2+ Sxd2#
* 1. ... Lc7 2. Txe7+ Kxc6 3. Dxc7+ Kb5 4. Da5+ Kc6 5. Dxa6+ Txa6#
1. Sd7! droht 2. Txf6+ e6 3. Lxe6+ Kxe4 4. Tf4+ Kd3 5. Lc4+ Lxc4#
1. Sd7 Lc7 2. Te5+ Kxc6 3. Ld5+ Kb5 4. Lc4+ Kc6 5. Lb5+ Lxb5#
1. Sd7 f5 2. Txd6+ Kxe4 3. Ld5+ Kd3 4. Lc4+ Ke4 5. Ld3+ Lxd3#
1. Sd7! droht 2. Txf6+ e6 3. Lxe6+ Kxe4 4. Tf4+ Kd3 5. Lc4+ Lxc4#
1. Sd7 Lc7 2. Te5+ Kxc6 3. Ld5+ Kb5 4. Lc4+ Kc6 5. Lb5+ Lxb5#
1. Sd7 f5 2. Txd6+ Kxe4 3. Ld5+ Kd3 4. Lc4+ Ke4 5. Ld3+ Lxd3#
Keywords: differenzierte Batterieabzüge
Genre: s#
Computer test: A. Baumann: Gustav 4.2a
FEN: rbQ2NB1/rP2p1p1/b1PpRpP1/3k3p/1P2N3/KP2P3/1R1B2P1/8
Input: Frank Müller, 2013-06-08
Last update: Dieter Berlin, 2024-01-30 more...
Genre: s#
Computer test: A. Baumann: Gustav 4.2a
FEN: rbQ2NB1/rP2p1p1/b1PpRpP1/3k3p/1P2N3/KP2P3/1R1B2P1/8
Input: Frank Müller, 2013-06-08
Last update: Dieter Berlin, 2024-01-30 more...
33 - P1277667
Leonid Lyubashevsky
Leonid Makaronez
(8) The Ural's Problemist 73 2013
Wladimir Sheltonoshko 70 JT
2. Lob
(9+10)
s#6
Leonid Lyubashevsky
Leonid Makaronez
(8) The Ural's Problemist 73 2013
Wladimir Sheltonoshko 70 JT
2. Lob
(9+10)
s#6
1. Sc2 droht 2. De7+ Kf5 3. Sd4+ Kg4 4. Dh4+ Lxh4#
1. ... g5 2. Ld5+ Kxd5 3. bxa8=D+ c6 4. Dd4+ Ke6 5. De5+ Kd7 6. Db7+ Lc7#
1. ... Dg5 2. Dd4+ Kf5 3. Txf3+ Df4 4. Se3+ Kg5 5. Dxf4+ Kh5 6. Dh4+ Lxh4#
1. ... g5 2. Ld5+ Kxd5 3. bxa8=D+ c6 4. Dd4+ Ke6 5. De5+ Kd7 6. Db7+ Lc7#
1. ... Dg5 2. Dd4+ Kf5 3. Txf3+ Df4 4. Se3+ Kg5 5. Dxf4+ Kh5 6. Dh4+ Lxh4#
Anton Baumann: DL minor nach 1. ... Dd1 2.De7+ Kf5 3.Sd4+ Dxd4 4.Lc2+ Dd3,De4 5.LxD+ Kg4 6.Dh4 Lxh4#
oder 2.Dh4+ Kf5 3.Sd4+ Dxd4 4.Txf3+ Df4 5.Txf4+ Ke5 6.Df6.De7+ LxD# (2023-05-05)
comment
oder 2.Dh4+ Kf5 3.Sd4+ Dxd4 4.Txf3+ Df4 5.Txf4+ Ke5 6.Df6.De7+ LxD# (2023-05-05)
comment
Genre: s#
FEN: nK1b1r2/PPp2p2/1p3Qp1/1P6/3Nk3/1BR2pB1/8/2q5
Input: Frank Müller, 2013-09-13
Last update: Frank Müller, 2013-09-13 more...
34 - P1297332
Evgeny Fomichev
The Ural's Problemist 07-09/2003
Alexej G. Kopnin 85 MT
3. Preis
(13+11) C+
s#5
Evgeny Fomichev
The Ural's Problemist 07-09/2003
Alexej G. Kopnin 85 MT
3. Preis
(13+11) C+
s#5
1. Db6 droht 2. Sd8+ Ke5 3. Sxc6+ Sxc6 4. Dd4+ Sxd4 5. Sf3+ Sxf3# 1. Db6 Sb7 2. Sxd6+ Ke5 3. Dc5+ Sxc5 4. Sxc4+ Lxc4,Sxc4 5. Te4+ Sxe4#
1. Db6 c5 2. Sh6+ Ke5 3. Txc5+ d5,dxc5 4. Sxc4+ Lxc4,Sxc4 5. Df6+ gxf6#
1. Db6 Lxd2 2. Sh6+ Ke5 3. Lxd6+ Kxd6 4. d8=D+ Ke5 5. Df6+ gxf6# 1. Db6 g2 2. Sxd6+ Ke5 3. De3+ Txe3 4. Sxc4+ Lxc4,Sxc4 5. Te4+ Txe4#
1. Db6 c5 2. Sh6+ Ke5 3. Txc5+ d5,dxc5 4. Sxc4+ Lxc4,Sxc4 5. Df6+ gxf6#
1. Db6 Lxd2 2. Sh6+ Ke5 3. Lxd6+ Kxd6 4. d8=D+ Ke5 5. Df6+ gxf6# 1. Db6 g2 2. Sxd6+ Ke5 3. De3+ Txe3 4. Sxc4+ Lxc4,Sxc4 5. Te4+ Txe4#
Genre: s#
Computer test: A. Baumann: Gustav 4.2a
FEN: 5BB1/2RP1Np1/2ppk1P1/n5KP/2pQ1RPP/6pr/bn1N4/2b5
Input: Frank Müller, 2015-02-08
Last update: Dieter Berlin, 2023-11-23 more...
35 - P1396478
Gennady Koziura
The Ural's Problemist Website 11/2021
1.-3. Preis
Aleksandr Azhusin 70 JT
Section s# with model mates
WCCI=9
(12+10) C+
s#6
Gennady Koziura
The Ural's Problemist Website 11/2021
1.-3. Preis
Aleksandr Azhusin 70 JT
Section s# with model mates
WCCI=9
(12+10) C+
s#6
1. Lb1-d3! e4xd3+ 2. Ke2-d1 d2 3. Th2-e2 h2 4. Sd5xb4+ La5xb4 5. Dc7-b7+ Ka5 6. Sd4xb3+ La4xb3#
1. ... e4-e3 2. Ke2-e1 e3-e2 3. Lf4-h6 g7xh6 4. Th2-f2 h2,h5 5. Ld3xb5+ La4xb5 6. Sd5xb4+ La5xb4#
1. ... e4xf3+ 2. Ke2-f1 f3-f2 3. Sd5xb6 La5xb6 4. Th8-a8+ Lb6-a7 5. Sd4xb5 La4xb5 6. Ld3-c4 Lb5xc4#
“Three echo chameleon mates.The well-known matrix with two walled up Bishops creating a chameleon echo came under a powerful attack by the Ukrainian composer. He succeeded in fulfilling the plan with three echo chameleon mates. Bravo, Gennady!” (Judge A. Azhusin)
1. ... e4-e3 2. Ke2-e1 e3-e2 3. Lf4-h6 g7xh6 4. Th2-f2 h2,h5 5. Ld3xb5+ La4xb5 6. Sd5xb4+ La5xb4#
1. ... e4xf3+ 2. Ke2-f1 f3-f2 3. Sd5xb6 La5xb6 4. Th8-a8+ Lb6-a7 5. Sd4xb5 La4xb5 6. Ld3-c4 Lb5xc4#
“Three echo chameleon mates.The well-known matrix with two walled up Bishops creating a chameleon echo came under a powerful attack by the Ukrainian composer. He succeeded in fulfilling the plan with three echo chameleon mates. Bravo, Gennady!” (Judge A. Azhusin)
Keywords: Model mate (3)
Genre: s#
Computer test: Gustav 4.1c
FEN: 7R/2Q3p1/kpP3P1/bp1N4/bp1NpB2/1p3P1p/1P2K2R/1B6
Input: Marcin Banaszek, 2021-11-30
Last update: Marcin Banaszek, 2022-09-08 more...
Genre: s#
Computer test: Gustav 4.1c
FEN: 7R/2Q3p1/kpP3P1/bp1N4/bp1NpB2/1p3P1p/1P2K2R/1B6
Input: Marcin Banaszek, 2021-11-30
Last update: Marcin Banaszek, 2022-09-08 more...
36 - P1396555
Sergey Smotrov
The Ural's Problemist Website 11/2021
3. Preis
Aleksandr Azhusin 70 JT
Section logical s#
WCCI=7.5
(5+11)
s#18
Sergey Smotrov
The Ural's Problemist Website 11/2021
3. Preis
Aleksandr Azhusin 70 JT
Section logical s#
WCCI=7.5
(5+11)
s#18
1. Df7-f4+? Sg3-e4 2. Sc7-b5+ Kd4-c4 3. Sb5-d6+ Kc4-d4 4. Lf8-f2+??
1. Tg5-d5+? Kd4-c4 2. Td5-a5+ Kc4-d4 3. Lf8-c5+ Kd4-e5 4. Lc5-e7+ Ta4xa5!
1. Tg5-d5+! Kd4-c4 2. Td5-b5+! Kc4-d4 3. Lf8-c5+ Kd4-e5 4. Lc5-e7+ Ke5-d4 5. Tb5-d5+ Kd4-c4 6. Td5-a5+ Kc4-d4 7. Sc7-b5+ Kd4-e5 8. Le7-f6+ Ke5-f5 9. Lf6-h4+! Kf5-e5 10. Df7-f6+ Ke5-d5 11. Sb5-c7+ Kd5-c4 12. Df6-f7+ Kc4-d4 13. Ta5-d5+ Kd4-c4 14. Td5-g5+ Kc4-d4 15. Df7-f4+ Sg3-e4 16. Sc7-b5+ Kd4-c4 17. Sb5-d6+ Kc4-d4 18. Lh4-f2+ Tg2xf2#
1. Returns of white figures
2. Logic maneuver Bf8 => h4
1. Tg5-d5+? Kd4-c4 2. Td5-a5+ Kc4-d4 3. Lf8-c5+ Kd4-e5 4. Lc5-e7+ Ta4xa5!
1. Tg5-d5+! Kd4-c4 2. Td5-b5+! Kc4-d4 3. Lf8-c5+ Kd4-e5 4. Lc5-e7+ Ke5-d4 5. Tb5-d5+ Kd4-c4 6. Td5-a5+ Kc4-d4 7. Sc7-b5+ Kd4-e5 8. Le7-f6+ Ke5-f5 9. Lf6-h4+! Kf5-e5 10. Df7-f6+ Ke5-d5 11. Sb5-c7+ Kd5-c4 12. Df6-f7+ Kc4-d4 13. Ta5-d5+ Kd4-c4 14. Td5-g5+ Kc4-d4 15. Df7-f4+ Sg3-e4 16. Sc7-b5+ Kd4-c4 17. Sb5-d6+ Kc4-d4 18. Lh4-f2+ Tg2xf2#
1. Returns of white figures
2. Logic maneuver Bf8 => h4
Keywords: Checking key, Perpetual check
Genre: s#
FEN: 1n3B2/2N2Q2/7b/6Rp/rp1k4/1ppp1Kn1/6r1/8
Input: Marcin Banaszek, 2021-12-03
Last update: Marcin Banaszek, 2022-09-02 more...
Genre: s#
FEN: 1n3B2/2N2Q2/7b/6Rp/rp1k4/1ppp1Kn1/6r1/8
Input: Marcin Banaszek, 2021-12-03
Last update: Marcin Banaszek, 2022-09-02 more...
1. a4xb3ep+ Sxa5+ 2. Kd5 0-0-0# (by AP not Td1#?)
R: 1. b2-b4 Kb4-c4+ 2. Sd6-b7,Sd6xLc7
With the typo wPd5 corrected to e5, the two forward candidate solutions are correct. How about the retro? Assume that White castling rights remain. bBg5 is promoted, and did so on c1 or g1. In either case, there were 6 pawn caps by Black, but in the former case, the blockaded wRh was not consumable. So the promotion must have been on g8, and White can't retract h2-h3. The missing White unit is light B, so was not just captured on e5 or b4. wRf6 is promoted, say wPd, which would have involved no captures.
This leaves b2-b4, preceded by Kb4-c4+ and before that Sd6-b7. Prior to b2-b4, why couldn't bQ have just played e.g. Qa8-a5+ instead? Because there would still be no prior move: wSb7 can't have just come from h5 or e6. Similarly Rc3-a3 has no precedent.
We don't know exactly what happened to sLc, but that doesn’t affect the soundness. It might have enabled wPc or wPd to capture. wPd did promote, but maybe it was wPc that after capturing promoted to T. Alternatively, Sd6xLc7 was possible.
R: 1. b2-b4 Kb4-c4+ 2. Sd6-b7,Sd6xLc7
With the typo wPd5 corrected to e5, the two forward candidate solutions are correct. How about the retro? Assume that White castling rights remain. bBg5 is promoted, and did so on c1 or g1. In either case, there were 6 pawn caps by Black, but in the former case, the blockaded wRh was not consumable. So the promotion must have been on g8, and White can't retract h2-h3. The missing White unit is light B, so was not just captured on e5 or b4. wRf6 is promoted, say wPd, which would have involved no captures.
This leaves b2-b4, preceded by Kb4-c4+ and before that Sd6-b7. Prior to b2-b4, why couldn't bQ have just played e.g. Qa8-a5+ instead? Because there would still be no prior move: wSb7 can't have just come from h5 or e6. Similarly Rc3-a3 has no precedent.
We don't know exactly what happened to sLc, but that doesn’t affect the soundness. It might have enabled wPc or wPd to capture. wPd did promote, but maybe it was wPc that after capturing promoted to T. Alternatively, Sd6xLc7 was possible.
Henrik Juel: Popeye 4.61 with 'opt enp b3' found no solution (2022-05-27)
Gerald Ettl: Schaut so aus, als ob die sDa5 nach e5 muss. 1.axb3 ep Sa5+ 2.Kxd5 0-0-0# (2022-05-27)
Gerald Ettl: aber auch 2.-Td1# ? (2022-05-27)
Henrik Juel: Andrew, can you throw any light on this problem? (2022-05-28)
Henrik Juel: Gerald, in AP problems like this one White must castle to legitimize the ep capture key (2022-05-28)
A.Buchanan: Hi Henrik, Gerald. I found this one in WinChloe with the current diagram. It gave the "solution" 1. axb3ep+ Sxa5+ 2. Kd5?? 0-0-0#. However when I tried running the WinChloe solver just now, it said there's no solution. Quite right: Rf5 controls d5. I don't think we can shift Qa5 to e5 though.
My first thought is that wPd5 should be on e5. Check my suggested solution in the solution text. However, as you will see, I think we need a second thought as well! Hope the finest retro minds can figure this out. Failing that, we could ask Igor. (2022-05-28)
Mario Richter: The diagram in the reprint in 'Uralsky Problemist' is exactly as given here. The solution given there without further explanation is: 1. ab+ (e.p.) Sxa5+ 2. Kd5 0-0-0#!
Notice that the second black move doesn't contain a capture sign!
Some typos in Andrew's analysis:
The black potential promotion squares should be c1 and g1.
White's last move couldn't have been b3-b4?? simply because that would give an illegal check. (2022-05-28)
A.Buchanan: Thanks Mario for the careful reading. I’ve fixed the errors. Pd5 may be a typo in the reprint then. It also creates a bogus retraction d4-d5, so I don’t think it can be right. Now for Igor. (2022-05-29)
A.Buchanan: Joaquim Crusats spotted R: 1. b2-b4 Kb4-c4+ 2. Sd6-b7, which I'm sure is the intended retraction. So we diagnose a single typo that occurred in the Uralsky reprint diagram: wPe5 appeared on d5. I suggest correcting it here. (2022-05-30)
A.Buchanan: Author confirmed this was a typo (2022-11-23)
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Gerald Ettl: Schaut so aus, als ob die sDa5 nach e5 muss. 1.axb3 ep Sa5+ 2.Kxd5 0-0-0# (2022-05-27)
Gerald Ettl: aber auch 2.-Td1# ? (2022-05-27)
Henrik Juel: Andrew, can you throw any light on this problem? (2022-05-28)
Henrik Juel: Gerald, in AP problems like this one White must castle to legitimize the ep capture key (2022-05-28)
A.Buchanan: Hi Henrik, Gerald. I found this one in WinChloe with the current diagram. It gave the "solution" 1. axb3ep+ Sxa5+ 2. Kd5?? 0-0-0#. However when I tried running the WinChloe solver just now, it said there's no solution. Quite right: Rf5 controls d5. I don't think we can shift Qa5 to e5 though.
My first thought is that wPd5 should be on e5. Check my suggested solution in the solution text. However, as you will see, I think we need a second thought as well! Hope the finest retro minds can figure this out. Failing that, we could ask Igor. (2022-05-28)
Mario Richter: The diagram in the reprint in 'Uralsky Problemist' is exactly as given here. The solution given there without further explanation is: 1. ab+ (e.p.) Sxa5+ 2. Kd5 0-0-0#!
Notice that the second black move doesn't contain a capture sign!
Some typos in Andrew's analysis:
The black potential promotion squares should be c1 and g1.
White's last move couldn't have been b3-b4?? simply because that would give an illegal check. (2022-05-28)
A.Buchanan: Thanks Mario for the careful reading. I’ve fixed the errors. Pd5 may be a typo in the reprint then. It also creates a bogus retraction d4-d5, so I don’t think it can be right. Now for Igor. (2022-05-29)
A.Buchanan: Joaquim Crusats spotted R: 1. b2-b4 Kb4-c4+ 2. Sd6-b7, which I'm sure is the intended retraction. So we diagnose a single typo that occurred in the Uralsky reprint diagram: wPe5 appeared on d5. I suggest correcting it here. (2022-05-30)
A.Buchanan: Author confirmed this was a typo (2022-11-23)
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Keywords: a posteriori (AP) (Type Petrovic), En passant as key, Castling (wg), Promotion (Tl), Valladao Task
Genre: h#, Retro
Computer test: Once the diagram typo was fixed, C+ Popeye v4.87 & basic but tricky retro logic
FEN: 3n4/1Np1p1p1/4pn2/q1p1PRb1/pPk1pr2/r6P/P4PP1/R3K3
Reprints: 18 The Ural's Problemist 13, p. 5, 02/1998
Input: A.Buchanan, 2022-05-27
Last update: A.Buchanan, 2022-05-30 more...
Genre: h#, Retro
Computer test: Once the diagram typo was fixed, C+ Popeye v4.87 & basic but tricky retro logic
FEN: 3n4/1Np1p1p1/4pn2/q1p1PRb1/pPk1pr2/r6P/P4PP1/R3K3
Reprints: 18 The Ural's Problemist 13, p. 5, 02/1998
Input: A.Buchanan, 2022-05-27
Last update: A.Buchanan, 2022-05-30 more...
1. Kg5 Kg8 2. De6+ Kh8 3. De8+ Dg8 4. De5+ Dg7 5. Db8+ Dg8 6. Dh2+ Dh7 7. Dxh7#
6. ... Kg7 7. Dh6#
2. ... Kf8 3. Dc8+ Ke7 4. Dc7+ Ke8 5. Dxg7 Kd8 6. d6 Kc8 7. Dc7#
6. ... Ke8 7. De7#
6. ... Kg7 7. Dh6#
2. ... Kf8 3. Dc8+ Ke7 4. Dc7+ Ke8 5. Dxg7 Kd8 6. d6 Kc8 7. Dc7#
6. ... Ke8 7. De7#
Genre: n#
FEN: 7k/6q1/3Q2P1/3P3K/6P1/8/8/8
Input: Rainer Staudte, 2022-09-24
Last update: Rainer Staudte, 2022-09-24 more...
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