Die Schwalbe

98 problem(s) found in 3735 milliseconds (displaying 98 problem(s)). [COMMENTDATE>=20200919 AND G='s#' AND K='Schachschlüssel'] [download as LaTeX]

1 - P1014751
Viktor S. Kolpakov
5221 Problemista 10-12/1997
Problemista 35 JT
4. Lob (Miniaturen)
P1014751
(5+2) C+
s#2
1. Se5+! Dxe5+ 2. De2+ Dxe2#
1. ... Kc2 2. Dd1+ Dxd1#
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1977
SCHRECKE: C+, popeye 4.89 (2023-10-21)
comment
Keywords: Aristocrat, Checking key, Cross check, Minimal, Miniature
Genre: s#
FEN: 8/8/8/7q/N5Q1/3k1N2/5B2/4K3
Reprints: 261 Selbstmatt-Miniaturen Reflexmatt-Miniaturen 2003
Input: Selbstmatt-Miniaturen/Reflexmatt-Miniaturen, 2004-05-01
Last update: Marcin Banaszek, 2023-10-21 more...
2 - P1015289
Valery Surkov
7902 feenschach 11-12/1999
P1015289
(5+2) C+
s#4
1. Sd5+ Kf7 2. Lh5+ Kf8 3. Daf6+ Txf6 4. Dh6+ Txh6#
1. ... Ke8,Kf8 2. Dc8+ Kf7 3. Dgf5+ Txf5 4. Lh5+ Txh5#
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Opferwechsel von Dame und Läufer.
2531
SCHRECKE: C+, Gustav 4.2a, Brute Force (2022-03-31)
comment
Keywords: Aristocrat, Minimal (t), Miniature, Change of Sacrifices, Checking key, Corner mate, Model mate
Genre: s#
FEN: 7K/4k3/Q4N2/6Q1/6B1/8/8/5r2
Input: Selbstmatt-Miniaturen/Reflexmatt-Miniaturen, 2004-05-01
Last update: Gunter Jordan, 2022-03-31 more...
3 - P1015390
Werner Speckmann
2356 Deutsche Schachzeitung 11/1967
P1015390
(4+3) C+
s#4
Zwei Lösungen
1. Df4+! Ke1 2. Df2+ Kd1 3. Td2+ Kc1 4. Lb2+ axb2#
1. Dh3+! Ke1 2. Lc3+ Kd1 3. Dd3+ Kc1 4. Lb2+ axb2#
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0571
SCHRECKE: C+, Gustav 4.2a, Brute Force (2021-11-20)
comment
Keywords: Miniature, Checking key
Genre: s#
FEN: 8/8/8/r7/3B3Q/p7/R7/K4k2
Input: Selbstmatt-Miniaturen/Reflexmatt-Miniaturen, 2004-05-01
Last update: Gunter Jordan, 2022-08-10 more...
4 - P1015630
Valery Surkov
7603 feenschach 01-05/1999
P1015630
(5+2) C+
s#4
1. c8=S+ Kf6 2. h8=L+ Kg6 3. f8=S+ Kh6 4. Lg7+ Dxg7#
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2311
SCHRECKE: C+, Gustav 4.2a, Brute Force (2022-03-31)
comment
Keywords: Minimal (d), Miniature, Checking key, under-promotion key, under-promotion B/S, under-promotion (LSS), konsekutive Umwandlungen 3 (SLS), Antiphönix
Genre: s#
FEN: 6K1/q1P1kP1P/8/3Q4/8/8/8/8
Input: Selbstmatt-Miniaturen/Reflexmatt-Miniaturen, 2004-05-01
Last update: Gunter Jordan, 2022-03-31 more...
5 - P1015741
Aleksandr Azhusin
9692 Die Schwalbe 08/1997
P1015741
(5+2) C+
s#14
1. Tc3+?? bxc3 und es fehlt ein Block auf c1
1. Da5? patt

1. Tb2+! Kc3 2. Tbd2+ Kb3 3. Da5 Kc3 4. f4 Kb3 5. f5 Kc3 6. f6 Kb3 7. f7 Kc3 8. f8=L Kb3 9. Lh6 Kc3 10. Da1+ Kb3 11. Tb2+ Kc3 12. Tc2+ Kb3 13. Tc3+ bxc3 14. Lc1 c2#
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Exzelsior
1879
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comment
Keywords: Excelsior white, Minimal (b), Miniature, under-promotion (L), Selfblock, Pawn mate, Checking key
Genre: s#
Computer test: Computerprüfung C+ Gustav 4.1d in 4 Tagen 13 Std. 22 Min.
FEN: 8/8/8/8/1p1R4/1k6/2R2P2/QK6
Reprints: 1280 Selbstmatt-Miniaturen Reflexmatt-Miniaturen 2003
1280 Selbstmatt-Miniaturen Reflexmatt-Miniaturen 2003
679 Album Russia Miniatures 1992-2000 2012
Input: Selbstmatt-Miniaturen/Reflexmatt-Miniaturen, 2004-05-01
Last update: Gunter Jordan, 2023-01-27 more...
6 - P1016504
Oleg W. Paradsinski
1215 Shakhmatnaya Poeziya 01-06/2002
P1016504
(5+2) C+
s#5*
* 1. ... Lxb7#
1. Db5+! Kc7 2. De5+ Kc8! 3. Dh8+ Kc7 4. Dd8+ Kc6 5. Da5 Lxb7#
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Synthese-Meeraner (im Selbstmatt), Themafigur: sL
Henrik Juel: C+ Popeye 4.61 (2020-11-09)
comment
Keywords: Mutate, Meerane-Thema, Round Trip (D-5), Miniature, Minimal (l), Model mate, Checking key, Flight-giving key
Genre: s#
FEN: b7/PN6/K1k1P3/Q7/8/8/8/8
Input: Selbstmatt-Miniaturen/Reflexmatt-Miniaturen, 2004-05-01
Last update: Gunter Jordan, 2020-11-26 more...
7 - P1017029
Vyacheslav Kopaev
1316 Shakhmatnaya Kompozitsiya 09-10/1998
P1017029
(9+7) C+
s#2
1. Dxe5? b6 2. axb6 g2#
1. Dxe5? Ka3 2. Tb6 g2#
1. Dxe5? bxa6!

1. Tb6+! Kxa5 2. Th5 g2#
1. Tb6+! Kc3 2. Df6 g2#
1. Tb6+! Ka3 2. Dxe5 g2#
1. ... Kc5 2. Df5 g2#
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comment
Keywords: Checking key, Pawn mate
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 8/1p6/R3Q2B/P3n3/1kP4R/5pp1/5p2/2NB1K1n
Input: Frank Müller, 2004-05-12
Last update: Dieter Berlin, 2024-02-05 more...
8 - P1017064
S. Storoshenko
Sergej I. Latysch

Shakhmatnaya Kompozitsiya 01-02/1999
13. Mannschafts- meisterschaft Rußlands
2. Platz
P1017064
(7+7) C+
s#2
1. Lxb7+? Kd5 2. Te8 Ta1#
1. Lxb7+? Kf3 2. Th4 Ta1# 1. ... Kf5!
1. Dxb7+? Kd5 2. Th4 Ta1#
1. Dxb7+? Kf3 2. Te8 Ta1# 1. ... Kd3!
1. Te8+? Kd5 2. Lxb7 Ta1#
1. Te8+? Kf3 2. Dxb7 Ta1# 1. ... Te6!

1. Th4+! Kd5 2. Dxb7 Ta1#
1. Th4+! Kf3 2. Lxb7 Ta1#
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comment
Keywords: Checking key
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 2B4R/1p3N2/Q1r5/8/4k3/p7/rp2N1p1/1K4B1
Input: Frank Müller, 2004-05-12
Last update: Dieter Berlin, 2023-12-02 more...
9 - P1081743
Ottó Titusz Bláthy
13299 Deutsche Schachzeitung 01/1914
P1081743
(7+5) C+
s#4
* 1. ... Lxf2#
1. Se7+! Kh8 2. Sf7+ Kh7 3. Sg6 Kg8 4. Sg5 Lxf2#
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SCHRECKE: C+, Gustav 4.2a, Brute Force (2021-11-24)
comment
Keywords: Checking key, Round Trip (k-3), Mutate
Genre: s#
FEN: 6k1/6p1/6N1/6NP/8/8/PP3R1p/K5br
Reprints: 1 Nedela (Riga) 26/01/1923
27) idee & form 159, p. 5381, 07/2023
Input: HBae, 2009-02-06
Last update: Gunter Jordan, 2023-09-07 more...
10 - P1086747
Frank Müller
Die Schwalbe 02/2005
Hemmo Axt 60 JT
4. Preis
P1086747
(4+4)
s#22
Probe 1. Dh5+? Dxh5+ 2. Kg8
1. Df2+! Kh3 2. Lg2+ Kh2 3. Dg3+ Kg1 4. Ld5+ Kf1 5. Df3+ Ke1 6. Tg1+ Kd2 7. Td1+ Kc2 8. De2+ Kc3 9. Dc4+ Kb2 10. Dxa2+ Kc3 11. Da3+ Kc2 12. Lb3+ Kc3 13. Lg8+ Kc2 14. Tc1+ Kd2 15. Dc3+ Ke2 16. Te1+ Kf2 17. De3+ Kg2 18. Te2+ Kf1,Kh1 19. Df3+ Kg1 20. Tg2+ Kh1 21. Tg7+ Kh2 22. Dh5+ Dxh5#
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Korrektur (sBh5 nach a2) in Die Schwalbe 12/2016
Henrik Juel: Popeye 4.61 with 'opt non 1 1 thr 0' found no flaws (2022-10-17)
comment
Keywords: Führung w Figur, Logik - Multiple Rückkehr, Checking key, Perpetual check
Genre: s#
FEN: 4q3/1B2p1RK/8/8/8/5Q2/p6k/8
Reprints: M33 mpk-Blätter 10/2011
F236 FIDE Album 2004-2006 2013
Input: Frank Müller, 2009-06-18
Last update: Gunter Jordan, 2022-10-17 more...
11 - P1090483
Aleksandr Azhusin
14799 Ideal-Mate Review 04-06/2005
P1090483
(10+2) C+
s#11
1. Ld7+! Ka7 2. Lb8+ Ka8 3. La7+ Kxa7 4. Ta8+ Kxa8 5. Da6+ Kb8 6. Da7+ Kxa7 7. Sb5+ Kb8 8. Sa6+ Ka8 9. Sac7+ Kb8 10. Ta8+ Txa8 11. Sa6+ Txa6#
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comment
Keywords: Ideal mate, Minimal (t), Checking key
Genre: s#
Computer test: Gustav 4.1d
FEN: k1B4R/8/2K5/2PP4/1N6/N7/R3Q2B/r7
Input: Frank Müller, 2009-08-28
Last update: Gunter Jordan, 2021-12-30 more...
12 - P1094532
Gunter Jordan
3146 Schach-Aktiv 04/2006
P1094532
(5+4) C+
s#12
1. Sf5+! Ke4 2. Td4+ Ke5 3. Td6+ Ke4 4. Sg3+ Ke3 5. Td1 h5 6. Sxh5 Ke4 7. Sg3+ Ke3 8. Sf5+ Ke4 9. Td4+ Ke5 10. Td6+ Ke4 11. Sg3+ Ke3 12. Td1 Sc2#
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Moldenhauer: Computerprüfung: C+ Gustav 4.1d in 1 Tag 31 Min. (2022-07-22)
comment
Keywords: Tempo Winning Manouevre, Checking key, Selfblock, Model mate
Genre: s#
FEN: 8/8/7p/8/8/1p2k1N1/1B6/n2RKR2
Input: Frank Müller, 2009-11-20
Last update: Marcin Banaszek, 2022-07-30 more...
13 - P1200434
Torsten Linss
14606 Die Schwalbe 10/2010
1. Lob
P1200434
(5+2) C+
s#16
1. De8+? Kf6?? 2. De7+ Kf5 3. De4+ Kf6?? 4. Df3+ Dxf3# scheitert am wSh5.
1. Dh7+! Kf8 2. Dh6+ Kf7 3. Tg7+ Kf8 4. Tg5+ Kf7 5. Tf5+ Kg8 6. Sf6+ Kf7 7. Sg8+ Kxg8 8. Tg5+ Kf7 9. Tg7+ Kf8 10. Tg1+ Kf7 11. Dh7+ Kf8! 12. Dh8+ Kf7 13. De8+ Kf6 14. De7+ Kf5 15. De4+ Kf6 16. Df3+ Dxf3#
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Anton Baumann: C+ Gustav 4.1d (2020-12-26)
comment
Keywords: Aristocrat, Epaulettenmatt, Langzügige Miniatur, Minimal (d), Miniature, Checking key, Perpetual check, Model mate, Switchback (Tk), Rücknahme Schlüsselzug
Genre: s#
FEN: 7Q/5k2/8/7N/8/8/8/3qRKR1
Input: Frank Müller, 2011-08-15
Last update: Gunter Jordan, 2021-01-06 more...
14 - P1204166
Dieter Müller
6836 Schach , p. 29, 01/1972
Nationales Problemturnier 1971
1. ehrende Erwähnung
P1204166
(5+9) C+
s#3
1. De6? droht 2. De2+ fxe2# 1. ... f2!

1. Sf2+! gxf2 2. De6 Te4 3. Db3+ Sc3#
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Nightrider: Das Probespiel scheitert auch an 1.-- Th2! (was in der Originalquelle nicht erwähnt wird). Hier tritt eine Ersatzverteidigung nicht aufgrund einer vorausgehenden Lenkung auf, sondern als Folge des Schlüssels. (2023-12-09)
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comment
Keywords: Checking key, Sacrifice key, Cross check
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 8/8/2Q2p2/8/6Nr/n2k1pp1/1B1p4/rn1K1N2
Input: Frank Müller, 2011-10-07
Last update: Dieter Berlin, 2023-12-08 more...
15 - P1204207
Isai H. Rozenfeld
7311 Schach 10/1973
P1204207
(9+9) C+
s#3
1. Sd6+ Kd4 2. Sc6+ Dxc6 3. 0-0-0+ Sd3#
1. Sd6+ Kf4 2. Sg6+ Dxg6 3. 0-0+ Lf3#
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comment
Keywords: Castling, Checking key
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 4q3/4N3/8/1Nnppp2/4k1bP/4p3/pP2P2P/R3K2R
Input: Frank Müller, 2011-10-07
Last update: Dieter Berlin, 2024-03-20 more...
16 - P1214309
Edward Boswell
2559 Springaren 06-07/1954
P1214309
(11+12) C+
s#2
1. Dh4+! Lc4 2. Txc7 Sxc7#
1. ... Lg4 2. Txg7 Sxg7#
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Henrik Juel: C+ Popeye 4.61 (2022-03-08)
comment
Keywords: Symmetrical solution, Checking key
Genre: s#
FEN: 4n1n1/2pPpPp1/B1RpKpRp/p2N1N1P/k7/1p6/1P2b3/4Q3
Input: Frank Müller, 2011-10-11
Last update: Marcin Banaszek, 2022-03-10 more...
17 - P1232118
Vyacheslav Kopaev
3232 Suomen Shakki 02/1999
P1232118
(11+4) C+
s#2
1. Lf5+? Kxe5 2. Se2 Ta1# 1. ... Kxf4!
1. Df8? Kxe3,Kxe5 2. Db4 Ta1# 1. ... Kd4!
1. Da8+? Kxe5!

1. Db7+! Kd4 2. Sg4 Ta1# 2. Sc4?
1. Db7+ Kxe3 2. Db4 Ta1# 2. Te2?
1. Db7+ Kxf4 2. Sc4 Ta1# 2. Sg4?
1. Db7+ Kxe5 2. Db4 Ta1#
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comment
Keywords: Plus flights, Checking key
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 2Q5/2PP4/4B1R1/4P3/4kN2/p3N3/rpR3P1/1K6
Input: Frank Müller, 2012-02-12
Last update: Dieter Berlin, 2024-01-02 more...
18 - P1241642
Alain C. White
84 Illinois Chess Bulletin , p. 26, 04-05/1980
Version by P.L.Rothenberg and Edgar Holladay
P1241642
(8+7) C+
s#2
1. Se1+ fxe1=D 2. De4+ Dxe4#
1. Se1+ fxe1=T 2. De2+ Txe2#
1. Se1+ fxe1=L 2. Dc3+ Lxc3#
1. Se1+ fxe1=S 2. Dd3+ Sxd3#
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[Edgar Holladay]: The hundreth anniversary of Alain White's birth is March 3 of this year. As a memorial tribute, P.L.Rothenberg ("Chess Review" Problem Editor in the early 1940s) and I present No.84, a previously unpublished revision of one of White's problems (s. P1177158). The sprightly (if unorthodox) key, the general construction (including the useful pinned condition of the pieces on d6 and b5), and the problems's main theme (four distinct promotions of the f2 pawn) are all Alain White's. The present revision removes the diluting effects of an extraneous defense and an unwelcome dual mate in one of the main variations, the result being that the problem's only four mates are now given by a promoted black pawn, a feature perhaps not previously shown in a rendition of this task in a two-move selfmate.
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comment
Keywords: Allumwandlung, black (2), Checking key
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 1b6/5q2/3Rn3/rN2K3/8/B3QN2/B1k2pbR/8
Input: Mario Richter, 2012-06-15
Last update: Dieter Berlin, 2024-01-14 more...
19 - P1242715
Kurt Ewald
2978 Problemkiste 06/1992
P1242715
(7+5) C+
s#5*
* 1. ... Lxe2#
1. Tdc5+! Kd4 2. Dg4+ Le4 3. Dd1+ Ld3 4. Td5+ Kc4 5. De2 Lxe2#
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SCHRECKE: C+, Gustav 4.1d, Brute Force (2021-09-30)
comment
Keywords: Tempoverlustrückkehr, Mutate, Checking key, Switchback (DTkl), Model mate
Genre: s#
FEN: 8/6p1/6Bp/1R1R3K/2k4P/3bp3/1P2Q3/8
Input: Frank Müller, 2012-06-22
Last update: Marcin Banaszek, 2021-10-02 more...
20 - P1242902
Ernst Hasselkus
9400 Deutsches Wochenschach 06/03/1910
P1242902
(10+10)
s#12
1. Dc7+ Kd5 2. Td6+ Ke5 3. f4+ exf3ep 4. Te6+ Kd5 5. e4+ dxe3ep 6. Dd7+ Kc5 7. d4+ cxd3ep 8. Sb7+ Kc4 9. Tc6+ Kb5 10. Tg6+ Kc4 11. Db5+ Kxb5 12. c4+ bxc3ep#
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Henrik Juel: Popeye 4.61 with 'non 0 1 thr 0' found no flaws (2022-10-14)
comment
Keywords: En passant (4x), Checking key, Batteriematt horizontal, Line opening
Genre: s#
FEN: 3N4/5Qn1/2R4p/4k3/rpppp1Kp/8/2PPPPb1/B1R5
Reprints: 326 Versunkene Schätze , p. 138, 1998
Input: Frank Müller, 2012-06-23
Last update: Dieter Berlin, 2022-10-14 more...
21 - P1249511
György Bakcsi
11103 Schach 09/1986
2. Preis
P1249511
(10+5) C+
s#6
1. La7+ Kc7 2. b8=L+ Kxd7 3. Td8+ Ke6 4. e8=T+ Kf7 5. Sh6+ Kf6 6. g8=S+ Lxg8#
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3 Unterverwandlungen in die Figurenart, die zuvor das Umwandlungsfeld geräumt hat.
SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-12-09)
comment
Keywords: Königslenkung, konsekutive Umwandlungen 3 (LTS), Checking key, under-promotion (TLS), Square vacation
Genre: s#
FEN: 1B2R1N1/1P1BP1P1/1k6/5p2/R4n2/Kbq5/6Q1/8
Input: Frank Müller, 2012-09-21
Last update: Gunter Jordan, 2024-03-06 more...
22 - P1267514
Michel Caillaud
2648 U.S. Problem Bulletin 01-04/1993
2. ehrende Erwähnung
P1267514
(6+10) C+
s#2
1. Tf8+ Ke6 2. e8=D+ Lxe8#
1. Tf8+ Ke5 2. e8=T+ Lxe8#
1. Tf8+ Kg5 2. e8=L+ Lxe8#
1. Tf8+ Kg7 2. e8=S+ Lxe8#
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comment
Keywords: Allumwandlung, Checking key
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 1q1B2RR/4P3/3p1k2/K1nr3B/bn1p4/r1b5/8/8
Input: Frank Müller, 2013-04-15
Last update: Dieter Berlin, 2024-02-16 more...
23 - P1280119
Gerald Ettl
6712 feenschach 11/1994
Lob
P1280119
(6+8)
s#14
1. a8=T+ Kb6 2. b8=D+ Kxc6 3. d8=S+ Kd7 4. c8=L+ Kxd8 5. La6+ Kd7 6. Lb5+ Ke6 7. De8+ Kf6 8. De7+ Kg6 9. Le8+ Kh6 10. Df6+ Kh7 11. Lg6+ Kh6 12. Lf7+ Kh7 13. Dg6+ Kh8 14. Dh6+ Lxh6#
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Henrik Juel: Popeye 4.61 with 'opt non 0 1 thr 0' found no flaws (2022-08-15)
comment
Keywords: Allumwandlung, Königslenkung, konsekutive Umwandlungen 4 (TDSL), under-promotion key, Checking key, Perpetual check, Antiphönix, Königswanderung, Edge to edge
Genre: s#
FEN: 5K2/PPPP4/k1Bp4/2pp1p2/8/4b3/8/r3r3
Input: Frank Müller, 2013-11-05
Last update: Gunter Jordan, 2022-08-15 more...
24 - P1301257
Torsten Linss
S2512 The Problemist 09/2014
4. Lob
P1301257
(5+2)
s#11
1. b8=D+! Kd7 2. e8=T c5 3. Dd8+ Kc6 4. a8=D+ Kb5 5. Ddb8+ Kc4 6. Te1 Kd4 7. h8=L+ Kc4 8. Kd1 Kd3 9. Df4 c4 10. Lb2 c3 11. Lc1 c2#
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Anton Baumann: C+ Gustav 4.2a (2022-07-19)
comment
Keywords: Kindergarten Problem, konsekutive Umwandlungen 4 (DTDL), Pawn mate, under-promotion, Minimal (s), Miniature, Selfblock, Model mate, Checking key, Promotion key, Flight taking
Genre: s#
FEN: 8/PPk1P2P/2p5/8/8/8/2K5/8
Reprints: 14) idee & form 143, p. 4843, 07/2019
Input: Frank Müller, 2015-04-11
Last update: Rainer Staudte, 2023-01-19 more...
25 - P1304998
Gunter Jordan
13346 Springaren (136) 06/2015
P1304998
(7+4) C+
s#7
2 Lösungen
1) 1. c8=S+ Ke6 2. g8=D+ Tf7 3. Sd6 Kf6 4. Se4+ Ke6 5. Dxg6+ Tf6 6. Ke8 Txg6 7. Dg8+ Txg8#
2) 1. c8=T Ke6 2. Te5+ Kd6 3. Txg5 Ke6 4. d5+ Kd6 5. Df6+ Te6 6. g8=D Txf6 7. Df8+ Txf8#
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SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-11-15)
comment
Keywords: Echo, Exchange of Promotions, under-promotion key, konsekutive Umwandlungen 2 (SD, TD), Checking key (in 1), Antiphönix, Promotion (D)
Genre: s#
FEN: 3K1Q2/2P1r1P1/3k2p1/2R3p1/3P2P1/8/8/8
Input: Frank Müller, 2015-07-03
Last update: Gunter Jordan, 2023-12-29 more...
26 - P1305244
Friedrich Chlubna
381 Arbeiter-Zeitung (Wien) 01/03/1959
P1305244
(8+6) C+
s#2
1. Sf3+! Kf2 2. Dxa7+ Txa7#
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Veröffentlicht im Rahmen des Ludwig-Bornemisza-Lösungsturniers 1959

AZW: Der Verfasser ist ein Knabe von noch nicht vierzehn Jahren. Die Aufgabe ist einfach und ungekünstelt, darf aber als eine Talentprobe gelten.
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comment
Keywords: Checking key
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: r3R3/bQ6/8/4N3/8/2p4B/2p1P2P/K1N3kr
Input: Mario Richter, 2015-07-08
Last update: Dieter Berlin, 2023-12-13 more...
27 - P1328162
Yuri Paramonov
6610 Seven Chess Notes (131) 12/2016
2. Lob
P1328162
(4+3) C+
s#10
1. Dxf3+ Kc5 2. Dc3+ Kd6 3. Dd4+ Ke6 4. Dd5+ Kf6 5. Tf7+ Kg6 6. Le4+ Kh6 7. Dd6+ Kh5,Kg5 8. Tf5+ Kh4,Kg4 9. Df4+ Kh3 10. Lg2+ Dxg2#
1. ... Kd6 2. Df6+ Kc5 3. De5+ Kc4 4. Dd5+ Kc3 5. Tb3+ Kc2 6. Le4+ Kc1 7. Dc5+ Kd1,Kd2 8. Td3+ Ke1,Ke2 9. De3+ Kf1 10. Lg2+ Dxg2#
play all play one stop play next play all
more ...
comment
Keywords: Capture key, Checking key
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: q7/1R3Q2/2k5/8/8/5p2/6B1/7K
Input: Frank Müller, 2016-12-02
Last update: Alfred Pfeiffer, 2020-10-14 more...
28 - P1361354
Sergey Smotrov
2138 The Macedonian Problemist 55-56 01-08/2018
P1361354
(4+6)
s#16
1. Dd6+ exd6+ 2. Kf4!
1. Dd4+! Kc6 2. Tb6+ Kc7 3. Dc5+ Kd7 4. Tb7+ Ke8 5. Tb8+ Kd7 6. Da7+ Kc6 7. Tb6+ Kc5 8. Lb4+ Kc4 9. Da6+ Kb3 10. Le1+ Kc2 11. De2+ Kc1 12. Ld2+ Kc2 13. Lf4+ Kc3 14. Dd2+ Kc4 15. Tb4+ Kc5 16. Dd6+ exd6#
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Henrik Juel: 3... Kd8+ 4.Tb8+ and s#15 (2023-12-08)
Henrik Juel: Popeye 4.61 with 'non 1 1 thr 0' founnd no flaws (2023-12-08)
comment
Keywords: Perpetual check, Checking key, Switchback (DTk), Logical Problem
Genre: s#
FEN: 7r/4pppb/8/B1k1K3/1R6/8/3Q4/8
Input: Marcin Banaszek, 2019-02-20
Last update: Gunter Jordan, 2023-12-08 more...
29 - P1361903
Olaf Jenkner
2019/18 Schach in Schleswig-Holstein 03/2019
P1361903
(5+3) C+
s#9
1. Dhxh2+! Kf1 2. Dhg1+ Ke2 3. Dcc4+ Kf3 4. Dgd1+ Kg2 5. Dcd5+ Kh3 6. D4d3+ Kh4 7. De1+ Kh5 8. Ke4+ Kg4 9. Df4+ Dxf4#
1. ... Kf3 2. Dh5+ Kg2 3. Ddg6+ Kf1 4. Dh1+ Ke2 5. Dde4+ Kd2,Kf2 6. Deg2+ Kd3,Ke3 7. Dhh3+ Kd4 8. D2g4+ Kd5 9. De5+ Dxe5#
play all play one stop play next play all
Die beiden Varianten sollten auf jeden Fall nachgespielt werden.
„Vier weiße Damen, das ist starker Tobak, auch wie sie mit dem schwarzen König auf dem Parkett herumspringen. Die Echo-Epaulettenmatts mit Funktionswechsel der weißen Damen auf c7 und d6 als Block und Selbstmatterzwinger sind witzig. Schade, dass die weiße Dame auf h8 in den Mattbildern unbeteiligt herumsteht“ (Stephen Rothwell).
„ein Selbstmatt mit schweren Waffen“ (Claus Grupen).
Anton Baumann: C+ Gustav 4.2a (2021-11-25)
comment
Keywords: Non-standard material, Echomatt, Epaulettenmatt, Checking key
Genre: s#
FEN: 1q5Q/2Q5/3Q4/5K2/3Q4/8/6kp/8
Input: Olaf Jenkner, 2019-03-03
Last update: Marcin Banaszek, 2021-11-29 more...
30 - P1371414
Mikhail R. Kostylev
F181 SuperProblem (Website) 16/10/2019
2. ehrende Erwähnung
P1371414
(10+3) C+
s#11
1. b4+? Dxb4+ 2. Lxb4#

1. Tc6+! Kxd5 2. Dd6+ Ke4 3. Df4+ Kd5 4. Dc4+ Ke5 5. Dd4+ Kxf5 6. Df6+ Kg4 7. Dh4+ Kf3 8. Dh3+ Ke4 9. Te6+ Kd5 10. Sc3+ Kc5 11. b4+ Dxb4#
7. ... Kf5 8. Tf6+ Ke5 9. Lg3+ Kd5 10. Lc4+ Kc5 11. b4+ Dxb4#
play all play one stop play next play all
more ...
comment
Keywords: Checking key
Genre: s#
Computer test: Gustav 4.1d
FEN: 5Q2/1q6/3R4/2kP1P2/8/KP2P3/8/1b1NBB2
Input: Marcin Banaszek, 2020-01-04
Last update: Marcin Banaszek, 2021-02-12 more...
31 - P1378051
Sergey Smotrov
FIDE World Cup 8th 07/2020
Lob e.a.
P1378051
(4+8) C+
s#12
1. Tf6+! Ke7 2. Tf8+ Kd6 3. Df6+ Kd7 4. De7+ Kc6 5. Tf6+ Kb7 6. De4+ c6! 7. Db1+ Kc7 8. Tf7+ Kd6 9. Dg6+ Ke5 10. Df5+ Kd6 11. Dd7+ Ke5 12. Dd5+ cxd5#
play all play one stop play next play all
Judge Aleksandr Azhusin
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comment
Keywords: Checking key
Genre: s#
Computer test: A. Baumann: Gustav 4.1 d
FEN: brr5/p1p2R2/p2k4/5QB1/2K5/8/8/4n3
Input: Marcin Banaszek, 2020-07-20
Last update: Olaf Jenkner, 2020-11-23 more...
32 - P1379148
Vitaly Medintsev
F17 Moscow tourney 2020
1. Lob
P1379148
(9+2) cooked
s#16
1. Te1+! Kg2 2. Tg5+ Kf3 3. Lh5+ Ke4 4. Dc2+ Kd5 5. Lb8+ Ke6 6. Dc8+ Kf6 7. Tg6+ Kf7 8. Sg5+ Kf8 9. Kc7+ Ke7 10. De6+ Kf8 11. Dg8+ Ke7 12. Tg7+ Kf6 13. Tf7+ Ke5 14. Kc8+ Kd5 15. Tf5+ Kc6 16. Dd8 Lb7#
play all play one stop play next play all
Award: moscowchess.org 08/2020
Judge Valery Surkov
Cook: Dual am 4. Zug
1. Te1+! Kg2 2. Tg5+ Kf3 3. Lh5+ Ke4 4. Sf2+! Kd5 5. Lf6,Lg7+ Kd6 6. Td1+ Ld5 7. Da6,Dd7+ Kc5 8. Db7 Kd6 9. Te5 Kc5 10. b3 Kd6 11. Kc8 Kc5 12. Ld8 Kd6 13. Te4,Te7 Kc5 14. Sd3+ Kd6 15. Db8+ Kc6 16. Te6+ Lxe6#
8. ... Kc4 9. b3+ Kc5 10. Te5 Kd6 11. Kc8
Anton Baumann: Dual: 4.Sf2+ Kd5 5.Lf6,Lg7+ Kd6 6.Td1+ Ld5 7.Da6,Dd7+ Kc5 8.Db7 Kd6 9.Te5 Kc5 10.b3 Kd6 11.Kc8 Kc5 12.Ld8 Kd6 13.Te4,Te7 Kc5 14.Sd3+ Kd6 15.Db8+ Kc6 16.Te6+ Lxe6#
8. ... Kc4 9.b3+ Kc5 10.Te5 Kd6 11.Kc8 ... (2021-01-23)
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comment
Keywords: Checking key, Battery creation, Minimal
Genre: s#
FEN: b1QKB3/8/8/4B2R/8/4P2N/1P2R3/7k
Input: Marcin Banaszek, 2020-08-19
Last update: Arnold Beine, 2021-01-23 more...
33 - P1380125
James Malcom
(1) MatPlus.net Forum 29/8/2019
P1380125
(8+6) C+
s#6
1. Sd3+! Kc2 2. Tc5+ Kxd3 3. Dd6+ Ke4 4. Sc3+ bxc3 5. De5+ Kd3 6. 0-0-0+ Td2#
play all play one stop play next play all
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshows&tid=2343
James Malcom: As far as I know, this is the first presentation in a selfmate. Of course it can be argued that a Belen only constitutes White castling with mate, but as far as I see it as long as the BK's journey is done and the last move is White's castling, it is a Belen. haven't seen any opposition to this as I have seen. (2020-09-21)
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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...
34 - P1380126
James Malcom
(10) MatPlus.net Forum 31/8/2019
P1380126
(7+4) C+
s#3
1. Lc2+! Kxc2 2. Dd3+ Kxd3 3. 0-0-0+ Sd2#
play all play one stop play next play all
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshows&tid=2343
more ...
comment
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...
35 - P1380327
Sergey Smotrov
S0825 StrateGems SG92 10-12/2020
P1380327
(5+5)
s#14
1. Ta7-a8+! Kd8-c7 2. Db5-c4+ Kc7-b6 3. Dc4-b4+ Kb6-c7 4. Sd6-b5+ Kc7-b6 5. Ta8-b8+ Kb6-a6 6. Lh1-b7+ Ka6-b6 7. Lb7-d5+ Kb6-a6 8. Tb8-a8+ Ka6-b6 9. Sb5-d6+ Kb6-c7 10. Db4-c4+ Kc7-b6 11. Dc4-b5+ Kb6-c7 12. Ta8-a7+ Kc7-d8 13. Db5xe8+ Lh5xe8 14. Ta7-d7+ Le8xd7#
play all play one stop play next play all
Henrik Juel: Popeye 4.61 with 'opt non 0 1' found no flaws (2020-09-27)
comment
Keywords: Checking key
Genre: s#
FEN: 3kn2n/R7/3NK3/1Q5b/8/8/8/b6B
Input: Marcin Banaszek, 2020-09-27
Last update: Alfred Pfeiffer, 2020-10-07 more...
36 - P1380824
Sergey Smotrov
1374 Rochade Europa 05/1997
P1380824
(5+11)
s#19
1. Lxg6+? Sxg6+ 2. Kc7!
1. Lf5-g4+! Kh5-h4 2. Le3-f2+ Kh4-g5 3. Lg4-e6+ Kg5-h5 4. Tg2-h2+ Kh5-g5 5. Lf2-h4+ Kg5-h5 6. Lh4-e1+ Kh5-g5 7. Th2-g2+ Kg5-h5 8. Le6-g4+ Kh5-g5 9. Lg4-e2+ Kg5-f5 10. Tg2-f2+ Kf5-g5 11. Td4-g4+ Kg5-h5 12. Tg4xc4+ Kh5-g5 13. Tc4-g4+ Kg5-h5 14. Tg4-d4+ Kh5-g5 15. Tf2-g2+ Kg5-f5 16. Le2-g4+ Kf5-g5 17. Le1-h4+ Kg5xh4 18. Lg4-f5+ Kh4-h5 19. Lf5xg6+ Se7xg6#
play all play one stop play next play all
Henrik Juel: Popeye 4.61 with 'opt non 0 1 thr 0' found no flaws (2020-10-11)
comment
Keywords: Logical Problem, Switchback (TTL, k), Line opening, discovered checkmate, Batteriematt diagonal, Battery creation, Discovered check, Checking key, Perpetual check
Genre: s#
FEN: 5q2/3pn3/1n1K1ppp/b4B1k/2pR4/4B3/6R1/2r5
Input: Marcin Banaszek, 2020-10-11
Last update: Gunter Jordan, 2020-10-11 more...
37 - P1381070
James Malcom
SuperProblem (Website) 09/04/2020
P1381070
(10+5) C+
s#8
1. Ta1+! Kg2 2. Tb2+ Kf3 3. Ta3+ Ke4 4. Tb4+ Kd5 5. Ta5+ Kc6 6. Tc4+ Kb7 7. Tc7+ Kxa8 8. Ke7+ Dxf8#
play all play one stop play next play all
7 square route of the Black king

http://superproblem.ru/archive/probl/Sn/Malcom-s8-2020.gif
Olaf Jenkner: wBg3, +wPh2 you get a model mate (2020-10-18)
A.Buchanan: Can one begin with wTa3b3 so there is a genuine try 1. Tb1? (2020-10-19)
James Malcom: It turns out that this record was actually done, doubled, by P1371538. So a 14 square route of the Black king appears to be the record, for now anyway. (2021-01-01)
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comment
Keywords: corner to corner, Checking key, Superseded by (P1371538)
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: N3KQqr/P2P4/3BP3/5P2/6p1/1R5p/R7/7k
Input: James Malcom, 2020-10-17
Last update: James Malcom, 2021-01-01 more...
38 - P1381075
Jozef Holubec
F211 SuperProblem (Website) 07/04/2020
P1381075
(7+4) C+
s#10
1. Sbd1+! Kc7 2. Txf7+ Kc6 3. Dxc4+ Kd6 4. De6+ Kc5 5. Tc7+ Kd4 6. Sc2+ Kd3 7. Td7+ Kxc2 8. Dg6+ Te4 9. Dc6+ Tc4 10. Da4+ Txa4#
1. ... Ka8 2. Dd8+ Ka7 3. Txf7+ Ka6 4. Dd6+ Ka5 5. Tf5+ Ka4 6. Sb2+ Kb3 7. Tb5+ Kc3 8. Sbd1+ Txd1 9. T5b3+ cxb3 10. Tc1+ Txc1#
play all play one stop play next play all
more ...
comment
Keywords: Checking key
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/1k3b2/5R2/8/2pQ2B1/4N3/1N6/KR2r3
Input: Marcin Banaszek, 2020-10-17
Last update: Alfred Pfeiffer, 2020-10-19 more...
39 - P1381288
James Malcom
SuperProblem (Website) 25/10/2020
P1381288
(7+11) C+
s#8
1. Ta5+! b5 2. Txb5+ c5 3. Txc5+ d5 4. Txd5+ e5 5. Txe5 f5 6. Txf5+ g5 7. Tgxg5+ hxg5 8. g4+ Dxg4#
play all play one stop play next play all
Record of 1+6 pawn double-steps by White and Black

http://superproblem.ru/archive/probl/Sn/Malcom-s8-2020-1.gif
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comment
Keywords: Construction task, Construction record, Checking key
Genre: s#
Computer test: SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-10-25)
FEN: 4n1NN/1pppppp1/R6p/7k/6R1/7K/5pPP/6q1
Input: James Malcom, 2020-10-25
Last update: Alfred Pfeiffer, 2020-10-26 more...
40 - P1381378
Anton Baumann
19249 Schach , p. 80, 07/2020
P1381378
(7+8) C+
s#8
Zeroposition
a) wBd3->e4
b) wLd1->h5
a) 1. Lb3+! Kf8 2. Df6+ Ke8 3. c8=T+ Kd7 4. Td8+ Kc7 5. Dd6+ Kb7 6. Ld5+ Ka7 7. Txh8 Se8 8. Txe8
7. ... Se6 8. Dxe6
7. ... Sf5 8. exf5
7. ... Sh5 8. Txh5

b) 1. g4! Kf8 2. Df6+ Kg8 3. c8=D+ Kh7 4. Lg6+ Kh6 5. Lf7+ Kh7 6. Dxh8+ Kxh8 7. Dg6 Se8 8. Lxe8
7. ... Se6 8. Lxe6
7. ... Sf5 8. gxf5
7. ... Sh5 8. gxh5
3. ... Se8 4. Dxe8+ Kh7 5. De4+ Kg8 6. Dxh8+ Kxh8 7. Dg6
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19.249 (Baumann) a) 1.Lb3+! Kf8 2.Df6+ Ke8 3.c8T+ Kd7 4.Td8+ Kc7 5.Dd6+ Kb7 6.Ld5+ Ka7 7.T:h8 Se8/Se6/Sd5/Sh5 8.T:e8/D:e6/e:f5/T:h5 S matt; b) 1.g4! Kf8 2.Df6+ Kg8 3.c8D+ Kh7 4.Lg6+ Kh6 5.Lf7+ Kh7 6.D:h8+ K:h8 7.Dg6 Se8/Se6/Sf5/Sh5 8.L:e8/L:e6/g:f5/g:h5 S matt, 3… Se8 4.D:e8+ Kh7 5.De4+ Kg8 6.D:h8+ K:h8 7.Dg6 S matt (4 P.). „Die schwarze Springer-Turm-Batterie muss Matt setzen. Der bewegliche sSg7 wird von Weiß geschlagen, so dass wegen Zugzwang der sSg1 Matt setzen muss. Prima“ (KHS).
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comment
Keywords: Checking key, under-promotion (T), Promotion (D)
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 6kb/2P3n1/6Q1/8/8/p2P2P1/P5pp/K2B2nr
Input: Felber, Volker, 2020-10-29
Last update: Alfred Pfeiffer, 2020-10-30 more...
41 - P1381404
Gennady Koziura
Ivan Soroka

Gravure 2020
1. ehrende Erwähnung
P1381404
(7+3) C+
s#9
1. Td7+! Kc8 2. Tb7+ Kd8 3. Sh7 Ke8 4. Lg6+ Kd8 5. g5 Kc8 6. Lf5+ Kd8 7. Lg4 Ke8 8. Lh5+ Kd8 9. Dg8+ Lf8#
play all play one stop play next play all
more ...
comment
Keywords: Checking key
Genre: s#
Computer test: O. Jenkner: Gustav 4.1 d
FEN: 3k4/7R/1r1b1N1K/B2Q1B2/6P1/8/8/8
Input: Olaf Jenkner, 2020-10-31
Last update: Alfred Pfeiffer, 2020-10-31 more...
42 - P1381405
Aleksandr Azhusin
Gravure 2020
2. ehrende Erwähnung
P1381405
(8+2) C+
s#10
1. Sg5+! Td5 2. Thh8 Kd7 3. Thd8+ Kc6 4. d7 Kc7 5. Se6+ Kc6 6. Te8 Kxd7 7. Te7+ Kc6 8. Sec5 Kd6 9. Se4+ Kc6 10. Sa5+ Txa5#
play all play one stop play next play all
more ...
comment
Keywords: Checking key
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 1R6/K6R/2kP4/1r6/4N3/BN6/8/7B
Input: Olaf Jenkner, 2020-10-31
Last update: Alfred Pfeiffer, 2020-11-03 more...
43 - P1381409
Valery Surkov
Gravure 2020
3. Lob
P1381409
(4+4) C+
s#11
1. Lb5+! Kb6 2. Ld4+ Ka5 3. Lxc4+ Ka4,Kb4 4. Db5+ Ka3 5. Db2+ Ka4 6. Lb5+ Ka5 7. Lc3+ Kb6 8. Lc4+ Kc5,Kc6 9. Db5+ Kd6 10. De5+ Kc6 11. Dc7+ Dxc7#
play all play one stop play next play all
more ...
comment
Keywords: Checking key
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 2K5/p6q/B1k5/4Q3/2p5/2B5/8/8
Input: Olaf Jenkner, 2020-10-31
Last update: Alfred Pfeiffer, 2020-11-03 more...
44 - P1381543
Ivan Soroka
7651 Phénix 268 12/2016
P1381543
(5+2) C+
s#11
1. g7-g8=D+! Kf7-f6 2. Dg8-g4 Kf6-f7 3. Kh7-h8 Kf7-f6 4. Df4-g5+ Kf6-f7 5. Dg5-h5+ Kf7-f6 6. d7-d8=S Sf5-e3,S~ 7. Dg4-f4+ Se3-f5 8. Df4-d6+ Sf5xd6 9. Dh5-e5+ Kf6-g6 10. Te8-g8+ Kg6-h6 11. Sd8-f7+ Sd6xf7#
play all play one stop play next play all
Anton Baumann: C+ Gustav 4.1d (2020-11-11)
comment
Keywords: Promotion key, Checking key, under-promotion (S), konsekutive Umwandlungen 2 (DS)
Genre: s#
FEN: 4R3/3P1kPK/8/5n2/5Q2/8/8/8
Input: Marcin Banaszek, 2020-11-04
Last update: Marcin Banaszek, 2020-11-12 more...
45 - P1381558
Milomir Babic
8091 Phénix 279-280 11-12/2017
P1381558
(11+7)
s#11
1. Tb1+! Sxb1 2. Da3+ Sxa3 3. 0-0+ Sb1 4. a8=T+ La7 5. d5+ e5 6. dxe6ep+ Tg7+ 7. Kh1 e2 8. Te1 h5 9. b8=D h4 10. Db7 h3 11. Dg2 hxg2#
play all play one stop play next play all
Henrik Juel: Damaged by the dual 7... h5 8.b8=D,Te1 (2020-11-05)
paul: See P1373761 as a correction (2021-05-08)
comment
Keywords: Checking key, Castling, under-promotion (T), Promotion (D), En passant, Pawn mate, Corner mate, Pinning, pin-mate
Genre: s#
FEN: 7B/PPr1p3/7p/2b5/1NNP4/n2Qp3/1R5P/k3K2R
Input: Marcin Banaszek, 2020-11-05
Last update: Gunter Jordan, 2020-11-05 more...
46 - P1381635
Mirko Degenkolbe
8711 Seven Chess Notes 172, p. 19, 06/2020
2. Lob (wegen Vorgänger aberkannt)
P1381635
(5+2) C+
s#5*
* 1. ... Lh8xg7#
1. Dg5+! Kf7 2. Dd5+ Kf8 3. Da8+ Kf7 4. De8+ Kf6 5. Dh5 Lh8xg7#
play all play one stop play next play all
Synthese-Meeraner (im Selbstmatt), Themafigur: sL
(MD1531)
Anton Baumann: gespiegelter Vorgänger von Oleg Paradinski: P1016504 (2020-11-09)
comment
Keywords: Model mate, anticipated (P1016504), Minimal (l), Miniature, Mutate, Meerane-Thema, Checking key, Round Trip (D-5), Flight-giving key
Genre: s#
Computer test: Popeye WINDOWS98-32Bit-Version 3.77 (8192KB)
FEN: 7b/6NP/3P1k1K/7Q/8/8/8/8
Input: Felber, Volker, 2020-11-09
Last update: Felber, Volker, 2021-04-07 more...
47 - P1381642
Milomir Babic
8650 Phénix 301-302 11-12/2019
P1381642
(8+7)
s#11
1. d3-d4+! f7-f5 2. g5xf6ep+ Tg4-g6 3. 0-0+ Lf4-c1 4. Kg1-h1 h5-h4 5. Lg3-h2 h4-h3 6. f6-f7 b5-b4 7. f7-f8=L h6-h5 8. Lf8-d6 h5-h4 9. Lh2-g1 h3-h2 10. Ld6xh2 h4-h3 11. Tf2-g2 h3xg2#
play all play one stop play next play all
SCHRECKE: Nach 4. ... b4 geht 5.Lh2 oder 5.f7 (2020-11-09)
comment
Keywords: Checking key, En passant, Castling, under-promotion (L), Valladao Task, Pawn mate
Genre: s#
FEN: 8/5p1B/7p/1p4Pp/5br1/1N1P2B1/5R2/1k2K2R
Input: Marcin Banaszek, 2020-11-09
Last update: Alfred Pfeiffer, 2020-11-09 more...
48 - P1381646
Milomir Babic
8358v Phénix 301-302 11-12/2019
1. ehrende Erwähnung
P1381646
(12+7) C+
s#9
1. c7-c8=T+! Kc6-d5 2. f7xe8=L b7-b6 3. h7-h8=D b6xc5 4. Dh8-f6 c5xd4 5. Le8-g6 d4-d3 6. Df6-g5 Kd5xd6 7. e7-e8=S Kd6-d5 8. Se8-f6+ Kd5-d6 9. Te1-e6+ d7xe6#
play all play one stop play next play all
Version zu: P1381602
PR Yves Tallec 04-05/2020
SCHRECKE: Das ist ein s#9!
C+, Gustav 4.1d, Brute Force
Umwandlungsläufer sLe8! (2020-11-09)
comment
Keywords: Checking key, under-promotion key, Model mate, Selfblock, Allumwandlung, Pawn mate, Obvious promotion, konsekutive Umwandlungen 4 (TLDS)
Genre: s#
Computer test: Gustav 4.1c
FEN: 4b3/1pPpPP1P/2kP4/1pP2K2/1prP4/1B6/3P4/B3R3
Input: Marcin Banaszek, 2020-11-09
Last update: James Malcom, 2020-11-09 more...
49 - P1383362
Sergey Smotrov
18013 Die Schwalbe 300 12/2019
Spezialpreis
PR Mark Erenburg
WCCI=7
P1383362
(7+9)
s#20
1. De5+? fxe5 2. Kg4,Kg5!
1. Td3+! Kc4 2. Ta3+ Kd4 3. Sc2+ Kd5 4. Lg2+ Kc4 5. Dc8+ Kb5 6. Sc3+ Kb6 7. Db7+ Kc5 8. Se4+ Kc4 9. Da6+ Kd5 10. Sxf6+ Kc5 11. Se4+ Kd5 12. Sc3+ Kc5 13. Db5+ Kd6 14. Db8+ Kc5 15. Sa4+ Kc4 16. Lf1+ Kd5 17. Sb4+ Kd4 18. Td3+ Kc4 19. Tf3+ Kd4 20. De5+ Lxe5#
play all play one stop play next play all
1. Returns of white figures
2. Logic capture Pf6
3. The cross closed ring maneuver
White Q b8 – c8 – a6 – b5 – b8
4. Active blocking Rf3
more ...
comment
Keywords: Perpetual check, Checking key, Switchback (DTLSSk), Logical Problem
Genre: s#
FEN: 1Q3nr1/3pp1b1/5p1r/5P2/NN1k1K2/5R2/8/5B1n
Input: Gerd Wilts, 2020-12-25
Last update: Marcin Banaszek, 2022-09-02 more...
50 - P1385834
Daniele Gatti
1473 Sinfonie Scacchistiche 142 10-12/2020
P1385834
(12+8) C+
s#11
1. b2-b3+! Ka4-b5 2. c3-c4+ Kb5-c6 3. d4-d5+ Kc6xd7 4. e5-e6+ Kd7-e8 5. f6-f7+ Ke8-f8 6. Ld8xa5+ Kf8-g7 7. Df4xe3 Kg7-f6 8. De3-g1 Kf6-e5 9. Dg1-f1 Ke5-d4 10. Df1-e2 Kd4-c3 11. De2-b2+ a3xb2#
play all play one stop play next play all
more ...
comment
Keywords: Checking key, Corner mate, Pawn mate
Genre: s#
Computer test: Popeye 4.61 with 'opt non 0 1' found no flaws
FEN: R2B4/3Rp3/3p1P2/b1p1P3/kp1P1Q2/p1P1p3/PP6/KB6
Input: Marcin Banaszek, 2021-01-27
Last update: Alfred Pfeiffer, 2021-01-27 more...
51 - P1385841
Jose Antonio Garzon Roger
1480 Sinfonie Scacchistiche 142 10-12/2020
P1385841
(15+7)
s#11
1. b7-b8=D+! Td8xb8 2. a7xb8=T+ Kb6xc7 3. Tb8-b7+ Kc7xc6 4. d7-d8=S+ Kc6-d5 5. Tb7-d7+ Se4-d6 6. Tf5xe5+ De3xe5 7. g7-g8=L+ Tf4-f7 8. Lf1-g2+ Sg1-f3 9. h5-h6 De5-f5 10. Kg6-h5 Df5-e5 11. Dg5-f5 De5xf5#
play all play one stop play next play all
Henrik Juel: Popeye 4.61 with 'opt non 0 1' found no flaws (2021-01-27)
comment
Keywords: Promotion (D), konsekutive Umwandlungen 4 (DTSL), Allumwandlung, under-promotion (TLS), Promotion key, Checking key
Genre: s#
FEN: 3r4/PPRP2P1/1kP3K1/4bRQP/1B2nrN1/2P1q3/3N4/5Bn1
Input: Marcin Banaszek, 2021-01-27
Last update: Rainer Staudte, 2023-01-19 more...
52 - P1385979
Sergey Smotrov
F235 SuperProblem (Website) 20/11/2020
1. Lob
P1385979
(4+6)
s#20
1. De5+! Kc4 2. De4+ Kc3! 3. Tc5+ Kb3 4. Tb5+ Kc3 5. Lb4+ Kb3 6. Lf8+ Kc3 7. Dc6+ Kd4 8. Tb4+ Ke5 9. Te4+ Kf5 10. De6+ Kg5 11. Dh6+ Kf5 12. Tf4+ Ke5 13. Dg5+ Ke6 14. De7+ Kd5 15. Dd7+ Ke5 16. Ld6+ Kd5 17. La3+! Ke5 18. Tf5+ Ke4 19. De6+ Kd4 20. Lxb2+ Txb2#
play all play one stop play next play all
Judge Mihail Hramtsevic
Award 13.09.2021
Henrik Juel: Popeye 4.61 with 'opt non 1 1 thr 0' found no flaws (2021-01-29)
comment
Keywords: Checking key, Perpetual check
Genre: s#
FEN: 8/4B3/4Q3/5R2/3k4/8/rp2K2n/r4n2
Input: Marcin Banaszek, 2021-01-29
Last update: Marcin Banaszek, 2021-09-14 more...
53 - P1385984
Yuri Paramonov
F239 SuperProblem (Website) 30/11/2020
P1385984
(5+2) C+
s#15
1. De3+! Kh2,Kh4 2. Df2+ Kh3 3. Tg3+ Kh4 4. Tc3+! Kg5 5. Dg3+ Kf5,Kf6/Kh6 6. De5+/Dh4+ Kg6 7. Dh5+ Kf6 8. Tf7+ Ke6 9. Lg4+ Kd6 10. Tf6+ Ke7 11. Df7+ Kd8 12. Dg8+! Ke7 13. Te6+ Kd7 14. Tee3+! Kd6 15. Dd5+! Dxd5#
play all play one stop play next play all
more ...
comment
Keywords: Aristocrat, Minimal (D), Miniature, Checking key, Perpetual check, Epaulettenmatt
Genre: s#
Computer test: Gustav 4.1d
FEN: q7/1R2Q3/8/8/3K4/7k/8/3B2R1
Input: Marcin Banaszek, 2021-01-29
Last update: Marcin Banaszek, 2021-01-31 more...
54 - P1386918
Sergey Smotrov
2046 Gaudium 229 31/07/2020
Lob
PR Michael Barth
P1386918
(5+3) C+
s#14
1. Tc1+? Kxc1+ 2. Db2#
1. Tc3+! Kd2 2. Tce3+ Kc2 3. T1e2+ Kc1 4. Sd3+ Kd1 5. Sb2+ Kc1 6. Te1+ Kc2 7. Dc5+ Kd2 8. Sc4+ Kc2 9. Se5+ Kd2 10. Db4+ Kc2 11. Tc3+ Kd2 12. Td3+ Kc2 13. Tc1+! Kxc1+ 14. Db2+ Dxb2#
play all play one stop play next play all
Henrik Juel: Popeye 4.61 with 'opt non 0 1 thr 0' found no flaws (2021-03-02)
comment
Keywords: Discovered check, Aristocrat, Battery creation, Berlin Theme, Perpetual check, Logical Problem, Switchback (DTT), Checking key
Genre: s#
Computer test: Gustav 4.2e
FEN: 8/8/5r2/8/1Q6/3R4/K1k2N1q/4R3
Input: Gunter Jordan, 2021-03-02
Last update: Nightrider, 2024-01-13 more...
55 - P1388001
Aleksey Oganesyan
F21 Shakhmatnaya Kompozitsiya 154 12/2020
P1388001
(8+4)
s#24
1. Df5+! Kh4 2. Dg5+ Kxh3 3. Tf3+ Kh2 4. Dg3+ Kh1 5. Dh3+ Kg1 6. Tg3+ Kf2 7. Dg2+ Ke1 8. Te3+ Kd1 9. De2+ Kc1 10. Tc3+ Kb1 11. Dc2+ Ka1 12. Dc1+ Ka2 13. Tc2+ Kb3 14. Db2+ Ka4 15. Tc4+ Ka5 16. Db4+ Ka6 17. Txc6+ Ka7 18. Db6+ Ka8 19. Da6+ Kb8 20. Tb6+ Kc7 21. Db7+ Kd8 22. Td6+ Ke8 23. Dd7+ Kf8 24. Tf6+ Sxf6#
play all play one stop play next play all
Alexej Oganesjan: It's possible fix of cooked P1307629 (2015) (2022-03-29)
comment
Keywords: Checking key, Perpetual check
Genre: s#
FEN: 6nN/3Q3K/2p2RPP/4p2k/3P4/7N/8/8
Input: Marcin Banaszek, 2021-03-31
Last update: James Malcom, 2021-09-14 more...
56 - P1388468
Michael Schreckenbach
Manfred Zucker

3087 diagrammes 04-06/1994
2. Lob
P1388468
(5+4) C+
s#7
1. Tg1+! Kf2 2. Sg2 g5 3. Te1 g4 4. Te2+ Kf3 5. Te3+ Kf2 6. Df3+ gxf3 7. Te1 fxg2#
play all play one stop play next play all
(MZ847)
more ...
comment
Keywords: Interchange (TS), Queen sacrifice, Checking key, Corner mate, Pawn mate, Model mate
Genre: s#
Computer test: Gustav 4.0c Gustav 4.1d, Brute Force
FEN: 8/8/6p1/8/2p5/2P3p1/6R1/3QNk1K
Input: Felber, Volker, 2021-04-12
Last update: James Malcom, 2021-04-12 more...
57 - P1388516
Jozef Holubec
1006 Pat a Mat 115 03/2021
2. ehrende Erwähnung
Pat a Mat 2020-2021
P1388516
(7+2)
s#15
b) Tb5>b6
a) 1. Lg3-h4+! Ke7-d6 2. Df5-d5+ Kd6-c7 3. Dd5-b7+ Kc7-d6 4. Tb5-d5+ Kd6-e6 5. Td5-c5+ Ke6-d6 6. Lh4-e7+ De8xe7 7. Db7-b6+ Kd6-d7 8. Db6-c6+ Kd7-d8 9. Dc6-a8+ Kd8-d7 10. Da8-c8+ Kd7-d6 11. Tc5-c6+ Kd6-e5 12. Dc8-f5+ Ke5-d4 13. Tc6-c4+ Kd4xe3 14. Df5-f2+ Ke3-d3 15. Df2-e2+ De7xe2#
b) 1. Df5-f6+! Ke7-d7 2. Df6-d6+ Kd7-c8 3. Dd6-b8+ Kc8-d7 4. Tb6-b7+ Kd7-c6 5. Lb3-d5+ Kc6-c5 6. Lg3-d6+ Kc5-d4 7. Db8-a7+ Kd4-d3 8. Da7-a3+ Kd3-d4 9. Da3-c5+ Kd4-d3 10. Ld5-e4+ Kd3xe4 11. Tb7-b4+ Ke4-f3 12. Dc5-d5+ De8-e4 13. Dd5-d1+ Kf3xe3 14. Dd1-d2+ Ke3-f3 15. Dd2-e2+ De4xe2#
play all play one stop play next play all
Henrik Juel: Popeye 4.61 with 'opt non 0 1 thr 0' found no flaws in a (2022-08-03)
comment
Keywords: Checking key, Minimal
Genre: s#
FEN: 4q3/4k3/8/1R3Q2/8/1B2N1B1/P7/4K3
Input: Marcin Banaszek, 2021-04-13
Last update: Marcin Banaszek, 2022-08-03 more...
58 - P1389273
Viktor Yuzyuk
S463 Problemist Ukrainy 68 04-06/2021
P1389273
(7+6) C+
s#12
1. Tb3-e3+! Ka4-b4 2. Lb2-c3+ Kb4xc4 3. Lc3xa5+ Kc4-d4 4. Dc2-b2+ Kd4-c4 5. Db2-b3+ Kc4-d4 6. Db3-b6+ Kd4-c4 7. Db6xa6+ Kc4-d4 8. Da6-b6+ Kd4-c4 9. Te3-e4+ Sf6xe4 10. Db6-b5+ Kc4-d4 11. Se1-f3+ Df4xf3 12. La5-b6+ Se4-c5#
play all play one stop play next play all
more ...
comment
Keywords: Checking key
Genre: s#
Computer test: Henrik Juel: Popeye 4.61 with 'opt non 0 1 thr 0' found no flaws
FEN: 4n3/8/p1K2n2/p7/k1N2q2/1R6/1BQP4/4N3
Input: Marcin Banaszek, 2021-05-04
Last update: Alfred Pfeiffer, 2021-08-09 more...
59 - P1390603
Sergey Smotrov
18398 Die Schwalbe 306-1 12/2020
1. Lob
PR Dieter Werner
P1390603
(4+6)
s#20
1. Df5+! Ke3 2. Te4+ Kd3 3. Tb4+ Ke3 4. Df2+ Kd3 5. Df3+ Kc2 6. Sd4+ Kc1 7. De3+ Td2 8. Se2+ Kc2 9. De4+ Td3 10. Dc4+ Tc3 11. Da2+ Kd3 12. Td4+ Ke3 13. De6+ Kf3 14. Dg4+ Ke3 15. Dxg5+ Kf3 16. Tf4+ Ke3 17. Tg4+ Kd3,Kf3 18. Df5+ Ke3 19. Df2+ Kd3 20. Sc1+ Txc1#
play all play one stop play next play all
Wenn der sTa2 auf c3 stünde, ginge 1.Sc1+ T:c1#. Um den sTa2 nach c3 hin zu bekommen, sind einige "Klimmzüge", natürlich mit Dauerschach, nötig. Schwierig und schön. (KHS) 1.Df5+ Ke3 2.Te4+ Kd3 3.Tb4+ Ke3 4.Df2+ Kd3 erstes Etappenziel: wTb4 statt wTg4, Grundlage dafür, den sTa2 kunstvoll nach c3 bugsieren zu können: 5.Df3+ Kc2 6.Sd4+ Kc1 7.De3+ Td2 8.Se2+ Kc2 9.De4+ Td3 10.Dc4+ Tc3. Und nun gleichermaßen kunstvoll zurück zur Ausgangsstellung: 11.Da2+ Kd3 12.Td4+ Ke3 13.De6+ Kf3 14.Dg4+ Ke3 15.D:g5+ Kf3 16.Tf4+ Ke3 17.Tg4+ K~ 18.Df5+ Ke3 19.Df2+ Kd3, und schließlich 20.Sc1+ T:c1#.
Ein elegantes Kabinettstückchen, mit 10 Steinen federleicht gebaut!
more ...
comment
Keywords: Checking key, Switchback, Perpetual check
Genre: s#
FEN: 7r/8/2p5/6p1/6Rp/3k4/r3NQ2/4K3
Input: Die Schwalbe, 2021-06-08
Last update: Gunter Jordan, 2023-11-01 more...
60 - P1391792
Frank Richter
Bulletin 07/2021
2. Platz, Abteilung s#
Victory-Thematurnier zum virtuellen Sachsentreffen 2021
PR: Die Teilnehmer des TT.
P1391792
(5+2) C+
s#10
1. f8=T+! Ke7 2. Dg7+ Ke6 3. Te5+ Kd6 4. b8=D+ Tc7 5. Db6+ Tc6 6. Db4+ Tc5 7. Dgb7 Kxe5 8. D7e4+ Kd6 9. Td8+ Kc7 10. Da5+ Txa5#
play all play one stop play next play all
Das breite „V“ punktet vor allem durch das überraschende Opfer 7. Dgb7! und das abschließende Mustermatt. (F. Fiedler)

Forderung: Konstruiere ein Schachproblem deiner Wahl (außer Märchenschach) in Gestalt eines V (=
Victory) und besiege das Coronavirus der zweiten Welle.

Das Turnier fand im Frühjahr 2021 statt. Initiator und Turnierleiter war erneut Matthias Hentschel.

Preisbericht in: Broschüre "Preisberichte C-Turnier und V-Turnier", udv (Udo Degener Verlag) 2021
more ...
comment
Keywords: Miniature, Minimal, Symbol problem (V), under-promotion key (T), Promotion (D), Model mate, Checking key, Rook sacrifice, Queen sacrifice
Genre: s#
Computer test: SCHRECKE: C+, Gustav 4.1d, Brute Force (2021-07-15)
FEN: K5Q1/1P3P2/2r1k3/3R4/8/8/8/8
Input: Felber, Volker, 2021-07-15
Last update: Alfred Pfeiffer, 2022-01-28 more...
61 - P1391793
Michael Schreckenbach
Bulletin 07/2021
3. Platz, Abteilung s#
Victory-Thematurnier zum virtuellen Sachsentreffen 2021
PR: Die Teilnehmer des TT.
P1391793
(5+2) C+
s#13
1. Dd5+! Dd4 2. Da2+ Kd1 3. Db3+ Kd2 4. Tc2+ Kd1 5. Tf2+ Kc1 6. La3+ Db2 7. Tf1+ Kd2 8. Dd1+ Kxe3 9. Tf3+ Ke4 10. Dd3+ Ke5 11. Df5+ Kd4 12. Td3+ Kc4 13. Db5+ Dxb5#
play all play one stop play next play all
Hier ist alles XXL: zuglängstes Selbstmatt im Turnier, Clinch der Schwerfiguren, Schachorgie. (U. Degener)

Forderung: Konstruiere ein Schachproblem deiner Wahl (außer Märchenschach) in Gestalt eines V (=
Victory) und besiege das Coronavirus der zweiten Welle.

Das Turnier fand im Frühjahr 2021 statt. Initiator und Turnierleiter war erneut Matthias Hentschel.

Preisbericht in: Broschüre "Preisberichte C-Turnier und V-Turnier", udv (Udo Degener Verlag) 2021
more ...
comment
Keywords: Aristocrat, Symbol problem (V), Minimal, Miniature, Checking key, Rook sacrifice, Queen sacrifice
Genre: s#
Computer test: SCHRECKE: C+, Gustav 4.1d, Brute Force (2021-07-15)
FEN: 8/8/8/K5Q1/1B3q2/2R1R3/3k4/8
Input: Felber, Volker, 2021-07-15
Last update: Alfred Pfeiffer, 2022-01-28 more...
62 - P1392127
Daniele Gatti
Phénix 316 03/2021
4. Preis
Yves Tallec Memorial
WCCI=5.5
P1392127
(8+3)
s#15
1. Df2-f1+! Kh1-h2 2. Df1-h3+ Kh2-g1 3. Tf3-g3+ Kg1-f2 4. Tg3-g2+ Kf2-f1 5. Tg2-h2+ Kf1-g1 6. Dh3-g3+ Kg1-f1 7. Dg3-f3+ Kf1-g1 8. Th2-g2+ Kg1-h1 9. Tg2-f2+ Kh1-g1 10. Tf2-f1+ Kg1-h2 11. Df3-h1+ Kh2-g3 12. Tf1-g1+ Kg3-f2 13. Dh1-h2+ Kf2xe3 14. Dh2-e5+ Ke3-f2 15. De5-c5+ Lc1-e3#
play all play one stop play next play all
Judge Michel Caillaud
Henrik Juel: Popeye 4.61 with 'opt thr 1 non 0 1' found no flaws (2021-07-26)
Henrik Juel: thr 0, not 1 (2021-07-26)
comment
Keywords: Checking key
Genre: s#
FEN: 8/8/8/8/6PP/4PR2/2P1PQ2/r1bK3k
Input: Marcin Banaszek, 2021-07-26
Last update: Marcin Banaszek, 2022-09-01 more...
63 - P1392138
Daniele Gatti
Phénix 316 03/2021
4. Lob
Yves Tallec Memorial
P1392138
(14+9)
s#17
1. Lc3-d2+! Kc1-b1 2. 0-0+ Lb3-d1 3. Ta7xa1+ Kb1xa1 4. Tb7-a7+ Ka1-b1 5. Ta7-a1+ Kb1xa1 6. Tc7-a7+ Ka1-b1 7. Ta7-a1+ Kb1xa1 8. Td7-a7+ Ka1-b1 9. Ta7-a1+ Kb1xa1 10. Te7-a7+ Ka1-b1 11. Ta7-a1+ Kb1xa1 12. Tf7-a7+ Ka1-b1 13. Ta7-a1+ Kb1xa1 14. Tg7-a7+ Ka1-b1 15. Ta7-a1+ Kb1xa1 16. Th7-a7+ Ka1-b1 17. Le8-g6+ Th6xg6#
play all play one stop play next play all
Judge Michel Caillaud
Henrik Juel: Popeye 4.61 with 'opt thr 0 non 0 1' found no flaws (2021-07-26)
comment
Keywords: Non-standard material, Checking key
Genre: s#
FEN: 4B2r/RRRRRRRR/3b3r/3p4/1R1N4/1bB1p3/1p6/n1k1K2R
Input: Marcin Banaszek, 2021-07-26
Last update: Marcin Banaszek, 2022-08-08 more...
64 - P1392166
Valery Surkov
2133 Gaudium 237 28/02/2021
P1392166
(5+6)
s#18
1. Dd5+? Dxd5#?
1. ... Lxd5!

1. Df2+! Ke4 2. De3+ Kf5 3. Dg5+ Ke4 4. Dg6+ Kd4 5. Dg1+ Ke4 6. Db1+ Kd4 7. Dxb4+ Lc4 8. Dc3+ Ke4 9. Dxc4+ Kf5 10. De6+ Ke4 11. Dg6+ Kd4 12. Dg1+ Ke4 13. Db1+ Kd4 14. Db2+ Ke4 15. Dc2+ Kd4 16. Dc3+ Ke4 17. Df3+ Kd4 18. Dd5+ Dxd5#
play all play one stop play next play all
Henrik Juel: Popeye 4.61 with 'opt thr 0 non 0 1' (2021-07-27)
comment
Keywords: Preplan, Round Trip (D), Staircase (D), Switchback (Dk), Perpetual check, Logical Problem, Checking key
Genre: s#
FEN: q5b1/7r/3K4/2P1N3/1p1k4/5Q1p/3B4/8
Input: Rainer Staudte, 2021-07-27
Last update: Gunter Jordan, 2021-09-13 more...
65 - P1393385
Sergey Smotrov
9310 Seven Chess Notes 184 05/2021
2. Preis
PR Anatoli Stepotschkin
P1393385
(4+3)
s#18
1. Te8+? Kh7 2. Df7?

1. Df7+! Kh8 2. Df8+ Kh7 3. Sf5+ Kg6 4. Df6+ Kh5 5. Dh4+ Kg6 6. Te6+ Kf7 7. Df6+ Kg8 8. Te8+ Kh7 9. De7+ Kg6 10. Tg8+ Kh5 11. Sg3+! Kh6 12. Df6+ Kh7 13. Tg7+ Kh8 14. Te7+ Kg8 15. Te8+ Kh7 16. Df7+ Kh6 17. Te6+ Kg5 18. Df4+ Dxf4#

1. ... Kh7 2. Sf5+ Kh8 3. Df6+ Kg8 4. Te8+ usw.
play all play one stop play next play all
Henrik Juel: Popeye 4.61 with 'opt non 1 1 thr 0' found no flaws
1... Kh7? permits s#14 (2021-09-01)
comment
Keywords: Aristocrat, Miniature, Preplan, Checking key, Perpetual check, Switchback (DTk), Round Trip (k)
Genre: s#
FEN: 6k1/4R1N1/1n3Q2/4K3/8/8/8/2q5
Input: Rainer Staudte, 2021-09-01
Last update: Gunter Jordan, 2022-03-09 more...
66 - P1393409
Viktor Zheltukhov
9306 Seven Chess Notes 184 05/2021
P1393409
(4+3) C+
s#6
1. Th3+! Kg5,Kg4 2. Dg2+ Kf4 3. Df3+ Kg5 4. Df6+ Kg4 5. Sf2+ Dxf2 6. Df5+ Dxf5#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 (2021-09-01)
comment
Keywords: Aristocrat, Miniature, Checking key, Perpetual check, Model mate
Genre: s#
FEN: 8/q7/4K3/7k/8/bR6/2Q5/7N
Input: Rainer Staudte, 2021-09-01
Last update: Marcin Banaszek, 2021-09-04 more...
67 - P1393420
Viktor Yuzyuk
9256 Seven Chess Notes 183 04/2021
P1393420
(5+2) C+
s#15
1. Ke7+! Ka2 2. Lf7+ Ka3 3. Db2+ Ka4 4. Le8+ Ka5 5. Tc5+ Ka6 6. Tc6+ Ka5 7. Dc3+ Ka4 8. Tb4+ Ka5 9. Tb8+ Ka4 10. Tc7+ Dc6 11. Tb4+ Ka5 12. Ta7+ Da6 13. Kd8 Dxa7 14. Ta4+ Kb6 15. Dc7+ Dxc7#
play all play one stop play next play all
Henrik Juel: Stipulation should probably be s#15 (2021-09-01)
SCHRECKE: C+, Gustav 4.1d, Brute Force (als s#15) (2021-09-03)
comment
Keywords: Minimal (d), Miniature, Aristocrat, Checking key, Model mate, Switchback (TLk), Selfblock
Genre: s#
FEN: q1R1B2Q/1R6/5K2/8/8/8/8/k7
Input: Rainer Staudte, 2021-09-01
Last update: Marcin Banaszek, 2021-09-04 more...
68 - P1393421
Viktor Zheltukhov
Valery Ivanov

9255 Seven Chess Notes 183 04/2021
P1393421
(4+3) C+
s#8
1. Sg5+! Kg8 2. Df7+ Kh8 3. Ld4+ Sxd4 4. Df6+ Kg8 5. Dg6+ Kh8,Kf8 6. Dh6+ Kg8 7. Dh7+ Kf8 8. Se6+ Sxe6#
play all play one stop play next play all
SCHRECKE: C+, Gustav 4.1d, Brute Force (2021-09-02)
comment
Keywords: Miniature, Aristocrat, Checking key, Perpetual check
Genre: s#
FEN: 3K1k2/5N2/1n3Q2/1n6/8/8/5B2/8
Input: Rainer Staudte, 2021-09-01
Last update: Marcin Banaszek, 2021-09-04 more...
69 - P1396475
Olaf Jenkner
2254v Gaudium 251 30/11/2021
P1396475
(7+2) C+
s#5
1. Sd1+! Ke4 2. Lg2+ Kd4 3. Dh8+ Kc4 4. Ld5+ Sxd5 5. Sb6+ Sxb6#
1. ... Sd3 2. Dg5 Ke4 3. Lg2+ Kd4 4. De3+ Kc4 5. Sb2+ Sxb2#
play all play one stop play next play all
Ursprünglich stand noch ein überflüssiger wLd4 auf dem Brett, der in der LB (Gaudium 253, S. 4) entfernt wurde. Dies entdeckte Löser B. Kölske.
Henrik Juel: C+ Popeye 4.61 also (2022-06-29)
comment
Keywords: Minimal (s), Aristocrat, Checking key, Echo, Model mate, Flight giving and taking key
Genre: s#
Computer test: O. Jenkner: Gustav 4.1 d
FEN: 8/3N4/8/R7/K4n1Q/R1N2k2/8/5B2
Input: Olaf Jenkner, 2021-11-30
Last update: Marcin Banaszek, 2022-07-07 more...
70 - P1396555
Sergey Smotrov
The Ural's Problemist Website 11/2021
3. Preis
Aleksandr Azhusin 70 JT
Section logical s#
WCCI=7.5
P1396555
(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#
play all play one stop play next play all
1. Returns of white figures
2. Logic maneuver Bf8 => h4
Henrik Juel: Popeye 4.61 with 'opt thr 0 non 0 1' found no flaws (2022-09-02)
comment
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...
71 - P1398257
Steven B. Dowd
Mirko Degenkolbe

14922 Springaren 160 12/2021
P1398257
(9+8) C+
s#11
1. La5+! Ka4 2. Dc4+ Ka3 3. Lb4+ Ka4 4. Ld2+ Ka3 5. Lg5 Thg8 6. d8=L Th8 7. La5 Thg8 8. Lb4+ Ka4 9. Sa5! Th8 10. Lbxe7+ Kxa5 11. Ld8+ Tc7#
play all play one stop play next play all
Vergleiche P1249594.
(MD1779)
more ...
comment
Keywords: Checking key, under-promotion (L), Batteriematt diagonal, discovered checkmate, Line opening
Genre: s#
Computer test: SCHRECKE: C+, Gustav 4.2a, Brute Force
FEN: 3B1b1r/1N1Pp1rp/2P1P1pK/4p3/1k2P3/3Q4/8/3N4
Input: Felber, Volker, 2022-01-11
Last update: Gunter Jordan, 2023-01-25 more...
72 - P1399246
Viktor Zheltukhov
9798 Seven Chess Notes 193 02/2022
P1399246
(5+2) C+
s#9
1. Se1+! Kc3 2. Dc6+ Kb3 3. Tb2+ Ka3 4. Dc5+ Sb4 5. Ka1 Ka4 6. Tb1 Ka3 7. Th5 Ka4 8. Db5+ Ka3 9. Sc2+ Sxc2#
play all play one stop play next play all
SCHRECKE: C+, Gustav 4.2a, Brute Force (2022-02-19)
comment
Keywords: Aristocrat, Corner mate, Pinning, Miniature, Minimal (s), Model mate, Switchback (Sk), Rücknahme Schlüsselzug, Checking key, Selfblock
Genre: s#
FEN: 8/8/4Q3/3n4/7R/3k4/2N4R/1K6
Input: Gunter Jordan, 2022-02-19
Last update: Marcin Banaszek, 2022-02-21 more...
73 - P1399333
Sergey Smotrov
S492 Problemist Ukrainy 71 01-03/2022
5. ehrende Erwähnung
P1399333
(6+7)
s#19
1. Lb1+? d3 2. Dh4+ Kf3 3. Dg4+ Kf2 4. De2+ dxe2+ 5. Kc2!

1. Dg3-g4+! Ke4-d3 2. La2-b1+ Kd3-c4 3. Dg4-c8+ Kc4-b3 4. Dc8-c2+ Kb3-a3,Kb4 5. Dc2-c5+ Ka3-b3 6. Dc5-b5+ Kb3-a3 7. Db5-a5+ Ka3-b3 8. Lb1-c2+ Kb3-c4 9. Da5-a6+ Kc4-b4 10. Tg5-b5+ Kb4-c4 11. Lc2-b3+ Kc4-d3 12. Tb5-g5+ Kd3-e4 13. Da6-e2+ Ke4-f4 14. De2-e5+ Kf4-f3 15. De5-g3+ Kf3-e4 16. Lb3-c2+ d4-d3 17. Dg3-h4+ Ke4-f3 18. Dh4-g4+ Kf3-f2 19. Dg4-e2+ d3xe2#
play all play one stop play next play all
Judge Sergiy Borodavkin, 12/2022
Henrik Juel: Popeye 4.61 with 'opt non 3 2 thr 0' found no flaws (2022-02-22)
comment
Keywords: Checking key, Perpetual check, Pawn mate, Selfblock, Battery creation, Discovered check, Switchback (DT), Logical Problem
Genre: s#
FEN: 5nnr/8/1P5p/6R1/3pk3/6Q1/Bb1P4/3K4
Input: Marcin Banaszek, 2022-02-22
Last update: Marcin Banaszek, 2022-12-08 more...
74 - P1400084
Mykola Parkhomenko
3290 Mat-Pat 50 12/1996
Lob
Martin 1994-1995
P1400084
(5+9)
s#23
1. Dc3+! Ka2 2. Tb2+ Ka1 3. Txc2+ Kb1 4. Tb2+ Ka1 5. Txd2+ Kb1 6. Tb2+ Ka1 7. Tbxe2+ Kb1 8. Tb2+ Ka1 9. Txf2+ Kb1 10. Tb2+ Ka1 11. Txg2+ Kb1 12. Tb2+ Ka1 13. Txh2+ Kb1 14. Tb2+ Ka1 15. Tb8+ Ka2 16. Db3+ Ka1 17. Dd1+ Ka2 18. Db1+ Ka3 19. Db2+ Ka4 20. Db3+ Ka5 21. Db4+ Ka6 22. Te6+ Sxe6 23. Sc7+ Sxc7#
play all play one stop play next play all
Judge Vladislav Bunka 12/1996
Henrik Juel: Popeye 4.61 with 'opt non 0 1 thr 0' found no flaws (2022-03-28)
Anton Baumann: Mit der Einstellung 'der sK hat bis zu 2 Fluchtfelder' findet Gustav Duale:
16.Dd2+ Ka1! 17.Dc1,Dd1,De1+ Ka2 18.Db1+...
16.Dc4+ Ka1 17.Dc1+ Ka2 18.Db1+ 16. ...Ka3 17.Dxd3,Db4+ Ka2 18.Db1+ (2022-03-30)
comment
Keywords: Checking key, Perpetual check, Logical Problem, Switchback (DTk), Round Trip (D-4)
Genre: s#
FEN: KR6/4R3/8/3N2n1/8/1Q1p4/2pppppb/k7
Input: Marcin Banaszek, 2022-03-28
Last update: Gunter Jordan, 2022-03-29 more...
75 - P1400790
Mirko Degenkolbe
18912 Die Schwalbe 314, p. 508, 04/2022
P1400790
(6+4) C+
s#11
1. Dc8+! Ka7 2. Dc6 Kb8 3. Td8+ Ka7 4. Te8! Ka6 5. Sc5+ Ka7 6. Sd7 Ka6 7. Tee3 Ka7 8. Teb3 Ka6 9. Dc8+ Ka7 10. Db8+ Ka6 11. Sc5+ bxc5#
play all play one stop play next play all
Hauptplan:
1.Sc5+? …bxc5+, aber 1. …Kc3!
Also muss der weiße Springer das Feld b3 räumen, damit der weiße Th3 dort seinen Platz einnehmen kann. Aber wie soll das von statten gehen?

Lösung:
1.Dc8+! …Ka7
2.Dc6! …Kb8
3.Td8+! [AZE] …Ka7
4.Te8! [4.Te~?] …Ka6
5.Sc5+! …Ka7
6.Sd7! [4.S~?] …Ka6
7.Te3! …Ka7
8.Teb3 [Blockwechsel] …Ka6
9.Dc8+ …Ka7
10.Db8+ …Ka6
Und nun kann der Hauptplan endlich erfolgreich durchgeführt werden:
11.Sc5+! …bxc5# - Mustermatt
(MD1775)

Inhalt:
Neudeutsch-logisches Selbstmatt. Der Hauptplan scheitert daran, dass der weiße König über b3 flüchten kann. Nachdem der weiße Springer umgruppiert wurde und der weiße Td3 stattdessen das Feld b3 blockt, kann der Hauptplan erfolgreich durchgeführt werden. Außerdem AZE und zweimal weiße Auswahl (im vierten und sechsten Zuge). Mustermatt.
SCHRECKE: C+, Gustav 4.2b, Brute Force (2022-10-30)
comment
Keywords: Model mate, Checking key, Pawn mate, changed blocks, Logical Problem, Antizielelement, Switchback (Dk)
Genre: s#
FEN: 1Q6/8/kp6/1p6/nK6/RN1R1P2/8/8
Input: Felber, Volker, 2022-04-22
Last update: Marcin Banaszek, 2022-11-04 more...
76 - P1403824
Gustav A. Barth

dedicated to Emanuel Lasker
P1403824
(9+10) C+
#2
b) s#2
a) 1. Dxb4+! Sxb4 2. Sc3#

b) 1. Db5+! Kxb5 2. Sc3+ Sxc3#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 (2022-08-23)
comment
Keywords: Character problem (E,L), Twin, Checking key, Stipulation change
Genre: 2#, s#
FEN: 8/8/rQP1R3/n3p3/kp2K3/p2PB3/nRp1NrPb/8
Reprints: 47 Staten Island Chess-Nuts 05/1895
Input: Mario Richter, 2022-08-23
Last update: Marcin Banaszek, 2022-08-30 more...
77 - P1404839
Sergey Smotrov
Moscow tourney 10/2022
4. Lob
P1404839
(4+4)
s#13
1. Tf5-f4+! Kd4-d3 2. Dg5-f5+ Kd3-e3 3. Tf4-e4+ Ke3-d3 4. Te4-h4+ Kd3-e3 5. Sf6-g4+ Ke3-d4 6. Sg4-f2+ Kd4-e3 7. Df5-g5+ Ke3-f3 8. Th4-f4+ Kf3-e3 9. Tf4-f5+ Ke3-d4 10. Dg5-g4+ Kd4-e3 11. Dg4-f3+ Ke3-d4 12. Df3-d5+ Kd4-e3 13. Dd5-d2+ c3xd2#
play all play one stop play next play all
Judge Igor Agapov
Henrik Juel: Popeye 4.61 with 'opt non 2 1 thr 0' found no flaws
1... Ke3? 2.Sd5+ gives selfmate in 10 (2022-10-03)
comment
Keywords: Checking key, Perpetual check
Genre: s#
FEN: 8/8/5N2/5RQ1/b2k4/2p5/6p1/4K3
Input: Marcin Banaszek, 2022-10-03
Last update: Gunter Jordan, 2022-10-03 more...
78 - P1406264
Vidadi Zamanov
Sergey Smotrov

2534 The Macedonian Problemist 66 09-12/2021
1. ehrende Erwähnung
PR Predrag Žuvic
P1406264
(7+7)
s#18
1. e4+? Ke5 2. Dc3+ Kd6!

1. Db4-e4+! Kd5-d6 2. De4-c6+ Kd6-e5 3. Dc6-f6+ Ke5-d5 4. Df6-e6+ Kd5-c5 5. De6-c6+ Kc5-b4 6. Lg5-e7+ Kb4-a5 7. Dc6-c7+ Ka5-a6 8. Ld7-c8+ Ka6-b5 9. Dc7-c5+ Kb5-a4 10. Dc5-a7+ Ka4-b5 11. Lc8-d7+ Kb5-c4 12. Da7-c7+ Kc4-d5 13. Dc7-d6+ Kd5-c4 14. Dd6-b4+ Kc4-d5 15. e3-e4+! Kd5-e5 16. Db4-c3+ Ke5-f4 17. Le7-g5+ Kf4xf3 18. Dc3xd3+ Lb1xd3#
play all play one stop play next play all
Henrik Juel: Popeye 4.61 and 'non 1 1 thr 0' found no flaws (2022-11-29)
Henrik Juel: 1... Kc5? 2.Dc6+ Kb4 3.Le7+ Ka5 4.Dc7+ etc. and s#15 (2022-11-29)
comment
Keywords: Logical Problem, Switchback (DLk), Round Trip (D-4), Checking key, Queen sacrifice
Genre: s#
FEN: 8/3B4/8/3k2B1/1Q5P/np1pPPp1/5p2/1b3K2
Input: Marcin Banaszek, 2022-11-29
Last update: Gunter Jordan, 2023-02-26 more...
79 - P1406683
Mirko Degenkolbe
12692 feenschach 250 10-12/2022
P1406683
(5+2) C+
s#10
1. Df2+! Ke4 2. Sd7! Kd3,Kd5 3. Sb6!! Ke4 4. Lg7 Kd3 5. Td6+ Ke4 6. Lh6 Ke5 7. Dd4+ Kf5 8. Dh4 Ke5 9. Sc4+ Kf5 10. Tg6 hxg6#
play all play one stop play next play all
Das in der Ausgangsstellung vermutete Matt ist vorerst nicht spielbar, kommt aber nach geschickten Rangiermanövern am Ende der Lösung doch noch aufs Brett.
Die weiße Dame und der weiße Springer müssen ihre Zusammenarbeit intensivieren, um den Blockwechsel auf h6 zu ermöglichen. Dabei legen die beiden weißen Protagonisten weite Wege zurück, ebenso der schwarze König, der durch alle weißen Figuren so im Zaum gehalten werden muss, dass er immer (mindestens) einen Zug zur Verfügung hat und nicht patt gesetzt wird. Nach der Rückkehr der weißen Dame und des schwarzen Königs ist endlich das geplante Matt möglich.
Mustermatt.
Miniatur.
Schwarzes Minimal.
(MD1847)
more ...
comment
Keywords: Miniature, Model mate, Minimal (b), Checking key, Pawn mate
Genre: s#
Computer test: SCHRECKE: C+, Gustav 4.2b, Brute Force (2022-12-13)
FEN: 5N1B/7p/7R/5k1K/7Q/8/8/8
Input: Felber, Volker, 2022-12-13
Last update: Gunter Jordan, 2022-12-13 more...
80 - P1406958
Anatoly Stepochkin
469 Sinfonie Scacchistiche 149 07-09/2022
P1406958
(5+2) cooked
s#11
1. Lg7+! Kc5 2. Lf8+ Te7 3. Tc6+ Kb4 4. Tc7 Ka4 5. Lc6+ Kb4 6. Td7 Kc5 7. La4 Kb4 8. Lc2 Kc5 9. Dd4+ Kc6 10. Le4+ Txe4 11. Da4+ Txa4#
play all play one stop play next play all
Cook: NL 1. Lb2+! Kc5 2. La3+ Tb4 3. Dg3 Kc4! 4. Tc6+ Kd4 5. Td6+ Kc4! 6. Lf1+ Kc5 7. Lh3 Kc4 8. Dd3+ Kc5 9. Td7 Kc6 10. Dc2+ Tc4 11. Da4+ Txa4# (SCHRECKE 2023-01-01)
more ...
comment
Keywords: Aristocrat, Minimal (t), Miniature, Checking key
Genre: s#
FEN: 8/8/K6R/3k4/3Br3/3Q4/6B1/8
Input: Rainer Staudte, 2023-01-01
Last update: Marcin Banaszek, 2023-01-04 more...
81 - P1407594
Sergey Smotrov
Z378 Probleemblad 2009
2. ehrende Erwähnung
PR Hans Gruber + Dirk Borst
P1407594
(4+8)
s#23
1. Te5+? dxe5 2. Dxg6+ Txg6+ 3. Kh7!
1. Df2+! Kg4 2. Te4+ Kh3 3. Sf4+ Kg4 4. Sxg6+ Kh3 5. Te3+ Kg4 6. Dg3+ Kf5 7. Se7+ Kf6 8. Dg5+ Kf7 9. Dg8+ Kf6 10. Sd5+ Kf5 11. Dc8+ Dd7 12. Dc2+ Kg4 13. Dg6+ Kh4 14. Df6+ Kg4 15. Df3+ Kh4 16. Df2+ Kg4 17. Te4+ Kh3 18. Sf4+ Kg4 19. Sh5+ Kh3 20. Te3+ Kg4 21. Dg3+ Kf5 22. Te5+! dxe5+ 23. Dg6+ Txg6#
play all play one stop play next play all
Henrik Juel: Popeye 4.61 with 'opt non 0 1 thr 0' foud no flaws (2023-02-02)
comment
Keywords: Queen sacrifice, Perpetual check, Cross check, Logical Problem, Switchback (DTSk), Round Trip (D-11 S-6), Checking key
Genre: s#
FEN: 8/8/r2p2pK/n4k1N/qp6/4R1Q1/3p4/8
Input: Gunter Jordan, 2023-02-02
Last update: Gunter Jordan, 2023-02-02 more...
82 - P1407716
Paul Raican
19038 Die Schwalbe 316, p. 621, 08/2022
P1407716
(7+5)
s#15
1. Da2+? Kxc1 2. Db1+ Kd2 3. Sd1+ Ke2 4. Td3 Kf1 5. Se3+ Kf2 6. Df1+ Kg3 7. Sc4+ Kh2 8. Td2+ Kg3 9. Dg2+ Kf4 10. Td4+ Kf5 11. Df2+ Kg5 12. Ld2+ Kxh5 13. Dxh4+ Kg6 14. Dh6+ Kf5 15. De6+ fxe6#?, aber 15. ... Lxe6+!

1. Se2+! Kxe2 2. Da6+ Lb5 3. Tc2+ Kd1 4. Da1+ Kxc2 5. Tc3+ Kd2 6. Tb3+ Kc2 7. Tb2+ Kd3 8. Td2+ Ke3 9. Dg1+ Kf4 10. Td4+ Kf5 11. Df2+ Kg5 12. Ld2+ Kxh5 13. Dxh4+ Kg6 14. Dh6+ Kf5 15. De6+ fxe6#
play all play one stop play next play all
Henrik Juel: Popeye 4.61 with 'thr 0 non 0 1' found no flaws (2023-02-10)
comment
Keywords: Discovered check, Battery creation, Pawn mate, Queen sacrifice, Perpetual check, Model mate, Sacrifice of white pieces, Switchback (k), Checking key, Selfblock
Genre: s#
FEN: 8/1n1b1p2/8/Q2K3B/1B5p/2N2R2/3k4/2R5
Input: Gunter Jordan, 2023-02-10
Last update: Felber, Volker, 2023-02-17 more...
83 - P1408779
Valery Surkov
ru_chess_art 09/04/2023
P1408779
(4+2)
s#3
1. Tb1+? Txb1+ 2. Dxb1+!

1. De3+? Kc2 2. De2+ Kc1 3. Tb1+ Txb1#
1. ... Kd1!

1. Df1+! Kc2 2. De2+ Kc1 3. Tb1+ Txb1#
1. ... Kd2 2. Td3+ Kc2 3. Db1+ Txb1#
play all play one stop play next play all
SCHRECKE: C+, popeye 4.87 (2023-04-11)
comment
Keywords: Minimal (t), Miniature, Checking key, Perpetual check
Genre: s#
FEN: 8/8/8/1r6/8/1R1Q4/P7/K1k5
Input: Rainer Staudte, 2023-04-11
Last update: Gunter Jordan, 2023-04-11 more...
84 - P1408786
Valery Surkov
G45-14 feenschach 247 10-12/2021
P1408786
(4+3)
s#4
1. De4+! Kf6 2. Dd4+ Ke6 3. Dd7+ Kf6 4. Sg8+ Txg8#
1. ... Kd6 2. Df4+ Ke6 3. Df7+ Kd6 4. Sc8+ Txc8#
play all play one stop play next play all
SCHRECKE: C+, Gustav 4.2c, Brute Force (2023-04-11)
comment
Keywords: Miniature, Checking key
Genre: s#
FEN: 4K3/4N3/2r1k1r1/1R6/1Q6/8/8/8
Input: Rainer Staudte, 2023-04-11
Last update: Rainer Staudte, 2023-04-13 more...
85 - P1408788
Valery Surkov
G45-16 feenschach 247 10-12/2021
P1408788
(5+2)
s#4
1. Lb6+! Dxb6 2. Df7+ Kc6 3. Dd5+ Kc7 4. b8=D+ Dxb8#
1. ... Kc6 2. Dd5+ Kxb6 3. b8=D+ Ka6 4. Da7+ Dxa7#
play all play one stop play next play all
SCHRECKE: C+, Gustav 4.2c, Brute Force (2023-04-11)
comment
Keywords: Minimal (d), Miniature, Checking key, Promotion (D), Perpetual check, Corner mate
Genre: s#
FEN: K7/1Pk5/8/2B5/8/1Q1R4/8/6q1
Input: Rainer Staudte, 2023-04-11
Last update: Gunter Jordan, 2023-04-13 more...
86 - P1408792
Valery Surkov
G45-18 feenschach 247 10-12/2021
P1408792
(5+2)
s#4
1. Db4+! Kc6 2. Dc4+ Kb6 3. Dc5+ Ka6 4. Dc6+ Lxc6#
1. ... Lb5 2. c8=T! Ka6 3. Tc6+ Lxc6+ 4. Db7+ Lxb7#
1. ... Ka6? 2. c8=D+,c8L+ Lxc8 3. Db7+ Lxb7#
play all play one stop play next play all
Henrik Juel: promotion dual after 1... Ka6 (2023-04-11)
comment
Keywords: Miniature, Minimal (l), Checking key, Corner mate, under-promotion (T), Antiphönix, Model mate (Gnaden-)
Genre: s#
FEN: KB6/2Pb4/1k6/3R4/Q7/8/8/8
Input: Rainer Staudte, 2023-04-11
Last update: Gunter Jordan, 2023-04-13 more...
87 - P1408793
Valery Surkov
G45-19 feenschach 247 10-12/2021
P1408793
(5+2)
s#4
2 Lösungen
1. Dd4+? Kc6 2. Tc5+ Kb6 3. Db4+ Ka6 4. Db7+ Lxb7#
1. ... Ka6!

1) 1. Dc4! Lh3,L~ c8=S+ Lxc8 3. Dc7+ Ka6 4. Db7+ Lxb7#

2) 1. La7+! Kxc7 2. Da5+ Kc6 3. Db5+ Kc7 4. Db7+ Lxb7#
play all play one stop play next play all
SCHRECKE: C+, Gustav 4.2c, Brute Force (2023-04-12)
comment
Keywords: Minimal (l), Miniature, Perpetual check (in 2), under-promotion (S in 1), Antiphönix, Checking key
Genre: s#
FEN: KBb5/2P5/1k6/3R4/Q7/8/8/8
Input: Rainer Staudte, 2023-04-11
Last update: Gunter Jordan, 2023-04-13 more...
88 - P1408821
Valery Surkov
G45-46 feenschach 247 10-12/2021
P1408821
(5+2)
s#7
b) -wBd6
a) 1. d7! Ka6 2. b8=S+ Ka5 3. Da7+ La6 4. d8=D+ Kb5 5. Dad7+ Kc5 6. Dg5+ Kb6 7. Db7+ Lxb7#

b) 1. Da7+! La6 2. b8=L! Kb5 3. Dd7+ Kb6,Ka5 4. Dd8+ Kb5,Kc6,Kc5 5. Dd5+ Kb6 6. La7+ Kc7 7. Db7+ Lxb7#
3. ... Kc5 4. Dd5+
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SCHRECKE: a)+b): C+, Gustav 4.2c, Brute Force (2023-04-13)
Henrik Juel: C+ Popeye 4.61 also... (2023-04-13)
more ...
comment
Keywords: Minimal (l), Miniature, Twin, Checking key (in b), under-promotion (S, L), Exchange of Promotions, Corner mate, Model mate, Selfblock
Genre: s#
FEN: K7/1P6/3P4/kbQ5/3R4/8/8/8
Input: Rainer Staudte, 2023-04-13
Last update: Gunter Jordan, 2023-04-13 more...
89 - P1408822
Valery Surkov
G45-48 feenschach 247 10-12/2021
P1408822
(5+2)
s#7
2 Lösungen
1) 1. Dd4+! Kc6 2. Tc5+ Kb6 3. Db4+ Lb5 4. Lc7+ Ka6 5. b8=L! droht 6. Tc6+ Lxc6+ 7. Db7+ Lxb7#
5. ... Lf1,L~ 6. Db5+ Lxb5 7. Tc6+ Lxc6#

2) 1. Dd8+! Kc6 2. De8+ Kb6 3. Lc7+ Kxc7 4. b8=L+ Kb6 5. Dd8+ Kc6 6. Dd5+ Kb6 7. Db7+ Lxb7#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 (2023-04-13)
comment
Keywords: under-promotion (L,L), Minimal (l), Miniature, Checking key, Perpetual check (in 2), Corner mate, Model mate (Gnaden-)
Genre: s#
FEN: KB6/1P1Q4/bk6/4R3/8/8/8/8
Input: Rainer Staudte, 2023-04-13
Last update: Gunter Jordan, 2023-04-13 more...
90 - P1408824
Valery Surkov
G45-52 feenschach 247 10-12/2021
P1408824
(4+2)
s#8
b) sDh1->a1
a) 1. Ta7+! Kb6 2. Dd8+ Kc6 3. Tc7+ Kb6 4. Tc1+ Ka6 5. Dc8+ Kb6 6. Tb1+ Dxb1 7. Db8+ Ka6,Kc6 8. Db7+ Dxb7#

b) 1. Df7+! Kc8 2. Df5+ Kc7 3. Td7+ Kc8 4. Td4+ Kc7 5. Dc2+ Dc3 6. Dh7+ Kc8 7. Tc6+ Dxc6+ 8. Db7+ Dxb7#
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SCHRECKE: b) sDh1 nach a1
a)+b): C+, Gustav 4.2c, Brute Force (2023-04-13)
comment
Keywords: Echo, Aristocrat, Minimal (d), Miniature, Checking key, Corner mate, Model mate (Gnaden-), Perpetual check, Twin
Genre: s#
FEN: K3Q3/2k5/R7/3R4/8/8/8/7q
Input: Rainer Staudte, 2023-04-13
Last update: Gunter Jordan, 2023-04-13 more...
91 - P1409084
Valery Surkov
F1 7ShahMat 03/09/2021
P1409084
(5+2)
s#3
1. e8=L+? Df7 2. Df5+ Kh6 3. Dh7+ Dxh7#
1. ... Kf6!

1. e8=D+! Df7 2. Df5+ Kh6 3. Dh7+ Dxh7#
1. ... Kf6 2. Dh6+ Dg6 3. Dg7+ Dxg7#
play all play one stop play next play all
SCHRECKE: C+, popeye 4.87 (2023-04-28)
comment
Keywords: Exchange of Promotions (L-D), Miniature, Promotion key, Checking key, Minimal (d)
Genre: s#
FEN: 7K/4P3/6k1/4Rq2/5QP1/8/8/8
Input: Rainer Staudte, 2023-04-28
Last update: Gunter Jordan, 2023-04-28 more...
92 - P1409092
Valery Surkov
F9 7ShahMat 03/09/2021
P1409092
(5+2)
s#6
b)Df5->d1
a) * 1. ... Kc6 2. b8=S+ Kc7 3. Le7+ Kb6 4. Sd7+ Dxd7 5. Dc5+ Ka6 6. Da7+ Dxa7#
1. b8=D+! Kd7 2. Db7+ Kd8 3. Dcd5+ Dd7 4. Dc7+ Kxc7 5. Lb6+ Kxb6,Kc8 6. Db7+ Dxb7#
1. ... Kc6 2. Lb6+ Kd7 3. Dd4+ Kc6 4. De8+ Dd7 5. Dd5+ Kxb6 6. Db7+ Dxb7#

b) 1. Le7+! Kd7,Kb6 2. Db5+ Kc7 3. b8=L+ Kc8 4. De8+ Dd8 5. Dc6+ Dc7 6. La7 Dxc6#
play all play one stop play next play all
SCHRECKE: a)+b): C+, Gustav 4.2c, Brute Force (2023-04-28)
comment
Keywords: under-promotion (S,L), Minimal (d), Checking key
Genre: s#
FEN: K7/1Pk5/8/2B1Rq2/2Q5/8/8/8
Input: Rainer Staudte, 2023-04-28
Last update: Gunter Jordan, 2023-04-28 more...
93 - P1411430
Daniel Novomesky
2441 Gaudium 274 31/01/2023
nach Dikusarow
P1411430
(3+5)
s#17
1. Da8+! Kb6 2. Tc6+ Kb5 3. Da6+ Kb4 4. Tc4+ Kb3 5. Da4+ Kb2 6. Tc2+ Kb1 7. Db3+ Ka1 8. Da3+ Kb1 9. Tb2+ Kc1 10. Dc3+ Kd1 11. Td2+ Ke1 12. De3+ Kf1 13. Tf2+ Kg1 14. Kg3 g4 15. De2 g5 16. Txh2 Txh2 17. Dg2+ Txg2#
play all play one stop play next play all
Ideengeber: P1098749, vergleiche auch P1409493.
Henrik Juel: Popeye 4.61 with 'opt non 0 1' found no flaws (2023-07-30)
comment
Keywords: Königswanderung, Sacrifice of white pieces, Checking key, Schlüssel = Eckzug, Symmetrical end position, Round Trip (D-9)
Genre: s#
FEN: 2R5/k7/6p1/6p1/6K1/8/6Qp/7r
Input: Gunter Jordan, 2023-07-30
Last update: Gunter Jordan, 2023-07-31 more...
94 - P1412671
Mirko Degenkolbe
F351 SuperProblem (Website) 01/10/2023
P1412671
(3+4) C+
s#9
1. Dd3+! Ka4 2. Dxa6 Kb3 3. Dc6 Kxa3 4. Db5 a6 5. Dc4 a5 6. Db5 a4 7. Da5 Kb3 8. Dc5 a3 9. Dd4 a2#
3. ... a6 4. Dc2 Kxa3 5. Dc4 a5 6. Db5 a4 7. Da5 Kb3 8. Dc5 a3 9. Dd4 a2#
play all play one stop play next play all
Lösung:
1.Dd3+! (Zugzwang) …Ka4
2.Dxa6+ …Kb3
3.Dc6 …Kxa3 / … a6
4.Db5 / Dc2+ … a6 / …Kxa3
5.Dc4 … a5
6.Db5 [Rückkehr] … a4
7.Da5 …Kb3
8.Dc5 …Ba3
9.Dd4 [Rückkehr] … a2# - Mustermatt

SCHWALBE.
Die weiße Dame betritt im Laufe der Lösung neun verschiedene Felder.
Linearer Rundlauf.
Rückkehren.
Miniatur.
(MD1939)
Frank Richter: 1.Dd3+ Zugzwang??? (2023-10-03)
comment
Keywords: Miniature, Round Trip (D), Switchback (D), Checking key, Pawn mate
Genre: s#
Computer test: Gustav 4.1d
FEN: 8/p7/p7/8/3Q4/Pk6/1p6/1K6
Input: Felber, Volker, 2023-10-03
Last update: Gunter Jordan, 2023-10-03 more...
95 - P1414541
Daniel Novomesky
4968 Sachmatija 03/22 07-09/2022
P1414541
(3+3)
s#17
1. Ta6+! Kb8 2. Da7+ Kc8 3. Tc6+ Kd8 4. Dc7+ Ke8 5. Te6+ Kf8 6. De7+ Kg8 7. Tg6+ Kh8 8. Df8+ Kh7 9. Tg7+ Kh6 10. Df6+ Kh5 11. Th7+ Kg4 12. Th4+ Kg3 13. Dg5+ Kf3 14. Dg4+ Ke3 15. Df4+ Kd3 16. Dc4+ Ke3 17. Dc3+ Sxc3#
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Henrik Juel: Popeye 4.61 with 'opt non 0 1 thr 0' found no flaws (2024-01-17)
comment
Keywords: discovered checkmate, Aristocrat, Batteriematt horizontal, Queen sacrifice, Perpetual check, corner to corner (k), Königswanderung, Miniature, Switchback (k), Checking key
Genre: s#
FEN: k7/7Q/7R/8/8/8/8/1r1nK3
Input: Gunter Jordan, 2024-01-17
Last update: Gunter Jordan, 2024-01-17 more...
96 - P1414719
Daniele Gatti
F364 SuperProblem (Website) 14/01/2024
P1414719
(5+2) C+
s#8
1. Df5+ Ke7 2. Dc7+ Ke8 3. Da4+ Db5 4. De6+ Kf8 5. Dd8+ De8+ 6. Kh7 Dxd8 7. Df6+ Dxf6 8. Dg7+ Dxg7#
play all play one stop play next play all
more ...
comment
Keywords: Non-standard material, Checking key, Miniature, Minimal (d), Aristocrat, Cross check, Pinning, Unpinning, Sacrifice of white pieces
Genre: s#
Computer test: SCHRECKE: Gustav 4.2e
FEN: 8/8/4k1K1/8/8/6Q1/4q3/Q4QQ1
Input: Rainer Staudte, 2024-01-31
Last update: Dieter Berlin, 2024-01-31 more...
97 - P1415051
Aleksandr Pankratiev
4181 Variantim 90 08/2023
P1415051
(4+2)
s#9
1. Db3+! Ka5 2. Db4+ Ka6 3. Dc4+ Ka5 4. Tb5+ Ka6 5. Tbc5+ Kb6 6. De6+ Dd6
7. Db3+ Ka6 8. T7c6+ Dxc6 9. Db7+ Dxb7#
play all play one stop play next play all
SCHRECKE: C+, Gustav 4.2f, Brute Force (2024-02-14)
comment
Keywords: Discovered check, Aristocrat, Battery creation, Queen sacrifice, Perpetual check, Corner mate, Miniature, Minimal (d), Switchback (Dk), Checking key, Rook sacrifice
Genre: s#
FEN: K5Q1/1RR5/8/8/k7/8/7q/8
Input: Gunter Jordan, 2024-02-14
Last update: Gunter Jordan, 2024-02-14 more...
98 - P1415574
Aleksandr Pankratiev
10939 Seven Chess Notes 218, p. 20, 03/2024
P1415574
(5+2) C+
s#12
1. Dd1+ Tf3 2. Kh1 Kg3 3. De1+ Kg4 4. Dg1+ Tg3 5. Dd4+ Kf3 6. Dd5+ Kg4 7. Sf2+ Kf4 8. Te4+ Kf3 9. Dd3+ Kxf2 10. Th2+ Tg2 11. De3+ Kf1 12. Dg1+ Txg1#
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more ...
comment
Keywords: Aristocrat, Minimal (t), Miniature, Checking key
Genre: s#
Computer test: Gustav 4.1d
FEN: 8/8/8/4R2R/Q4rk1/7N/6K1/8
Input: Felber, Volker, 2024-03-05
Last update: Felber, Volker, 2024-03-09 more...
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