Die Schwalbe

50 problem(s) found in 3939 milliseconds (displaying 50 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT S='Phenix' AND K='Bivalve'] [download as LaTeX]

1 - P1018346
George C. Alvey
British Chess Magazine 11/1922
P1018346
(7+11) C+
#2
1. Lf5-h3 (dr.Te1#) Diese Drohung kann durch jeden Zug der schwarzen Türme pariert werden, weil dadurch die Schrägen a8-h1 und a6-f1 frei werden. Auf 1. ... Tb5-c5 folgt 2. Tc4# (Bivalve), ebenso auf 1. ... Tc6-b6 2. Td4-b4# (Bivalve) 1. ... Txe6 2. Tf5# Andere T-Züge werden mit 2. Dd5 oder Dd6# erledigt. 1. ... Se7 2. Dh8#

1. Lh3! droht 2. Te1#
1. ... Tcb6 2. Tb4#
1. ... Tbc5 2. Tc4#

1. ... Txe6 2. Tf5#
play all play one stop play next play all
AZW: Wir entnehmen dieses Problem dem letzten Weihnachtsbuche von A.C.White, welches ausschließlich dem modernen "Klappen-Thema" gewidmet ist. Es gibt kaum ein andres Thema, welches dem Komponisten einen derartigen Reichtum an Kombinationen bieten würde, sowohl für Zweizüger als auch für mehrzügige Aufgaben.
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comment
Keywords: Brian Stephenson Collection (3180), Bivalve (zweifach), Block
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: qn1Q2n1/b7/b1r1P2p/pr2kB1p/3R4/8/1B6/5RK1
Reprints: 95 Valves and Bi-Valves , p. 107, 1930
329 Arbeiter-Zeitung (Wien) 03/08/1931
10 Glos Poranny 06/12/1931
Input: Brian Stephenson, 2004-08-12
Last update: Rainer Staudte, 2023-06-02 more...
2 - P1020912
George Hume
V. The Chess Amateur 1930
P1020912
(6+12) C+
#3
1. Sg4! Dd5 2. Dh6+
1. ... Ld5 2. Da2
1. ... Df3 2. Lxf3+
1. ... Dxg2 2. Dxg2+

Verführung: 1. Dh6? Le6! 2. Sd5 (g8) Sf5!
Lösung: 1. Sf6-g4 (dr.Sxe5) Dd5 (öffnet die Turmreihe, versperrt aber den Lb3) 2. Dh6+ Se6 3. Dxe6# 1. ... Ld5 (entfesselt die sD) 2. Da2 ~ 3. Da8 oder Sxe5# 1. ... Dxg2 (Df3) 2. Dxg2 (Lxf3)+ ~ 3. Se5 (Ld5)#
play all play one stop play next play all
AZW: Georg Hume bevorzugte das Selbstmatt und bei direkten Problemen moderne Vorwürfe. Im obigen Bi-Valve-Problem wird ungewohnterweise eine gefesselte schwarze Figur zum Träger des Ideenspiels.
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comment
Keywords: Brian Stephenson Collection (5760), Bivalve
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 1K1R4/6n1/1pk2N2/1p2p3/1P1pq3/1b6/3Q2Bp/n3r2r
Reprints: 57 Valves and Bi-Valves , p. 69, 1930
392 Arbeiter-Zeitung (Wien) 22/01/1933
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-24 more...
3 - P1020942
Israil D. Katzenellenbogen
Zadachi i etyudy 1930
Alain C. White gewidmet
Valve/Bi Valve-Turnier 1930
Drei- und Vierzüger
P1020942
(14+7) C+
#3
1. Sf7! droht 2. Sd2+ Kxd4 3. Td3#
1. ... Sd8 2. Th8 ... 3. Dh7#
1. ... Sa5 2. Ta1 ... 3. Db1#
1. ... Sd6 2. Sd2+ Kxd4+ 3. c6#
1. ... Sxc5 2. Sh6
1. ... Da5,Da2 2. Sh6
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61, except for the double mate threat 1... Da5,Da2 2.Sh6 thr. 3.Ld5,Lf5# (2022-07-23)
comment
Keywords: Brian Stephenson Collection (5792), Bivalve (dreifach), Räumung and Bahnung (TD,zweifach)
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: q6N/1n2b3/1B2B3/2P1P1p1/2PPkp2/1p3N1R/4PPK1/6RQ
Reprints: 125 Valves and Bi-Valves , p. 171, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-23 more...
4 - P1020943
Ferdinand Metzenauer
Zadachi i etyudy 1930
P1020943
(8+9) C+
#3
1. Th6! droht 2. Sg6#
1. ... f5 2. Tb6
1. ... e3 2. Lc2
play all play one stop play next play all
"Zadachi i Etyudy" Valve-Turnier 1930,
Valve- und Bi-valve Probleme in 3 oder 4 Zügen.
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comment
Keywords: Brian Stephenson Collection (5793), Valve, Bivalve
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 5N2/b6B/r4pR1/4p3/4pkPK/2N4R/qr6/1b4B1
Reprints: 126 Valves and Bi-Valves , p. 172, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-25 more...
5 - P1021240
Godefroy Martin
Chess 1939
P1021240
(6+11)
#3
1. Tc7! droht 2. T6g7 ... 3. Tcf7#
1. ... e3 2. bxc3 ... 3. Lxc5#
1. ... g3 2. Tc6 ... 3. Tcxf6#
play all play one stop play next play all
BS Problemid: 6092
Authors: Martin, Godefroy
Sources:
Years: 1939
Henrik Juel: C+ Popeye 4.61 (2024-02-02)
comment
Keywords: Brian Stephenson Collection (6092), Bivalve
Genre: 3#
FEN: 3K1k2/7R/5pR1/2n2p2/3ppPp1/Bpr2b2/1P3b2/8
Input: Brian Stephenson, 2004-08-12
Last update: Nightrider, 2024-02-02 more...
6 - P1023672
Erich Brunner
502 Allgemeine Zeitung Chemnitz 10/10/1926
4. Preis
Zweizügerturnier 1925-26
B) Gewöhnliche Zweizüger
I. Allgemeine Konkurrenz
P1023672
(5+9) C+
#2
1. Dd2! droht 2. Dh2#
1. ... c6,Sb6,Sf6,Sg6,Lf6,Ta2,Ta4 2. Dh6#
1. ... Tb2,c5,Sc5,Se5,Le5,Tb4 2. Dg5#
play all play one stop play next play all
Motto: 'Weiß zieht und gewinnt'
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comment
Keywords: Brian Stephenson Collection (8536), Bivalve (sB + sS)
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 1qb2n2/2pnN3/r7/1r5k/8/5P2/8/b1B1Q2K
Reprints: 98 Valves and Bi-Valves , p. 110, 1930
2 Erich Brunner - Ein Künstler und Deuter des Schachproblems , p. 16, 1958
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-23 more...
7 - P1023714
Johan Scheel
Hvar 8 Dag 1926
P1023714
(7+10) C+
#2
1. Sgf6! droht 2. Tg8#
1. ... Sh3 2. Thxh7#
1. ... Se4 2. Dxh7#
1. ... Sf7 2. Tgxh7#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (8578), Bivalve (dreifach)
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 4NBNk/r5Rp/4p3/5Qn1/p6R/K4p2/8/1b4rq
Reprints: 96 Valves and Bi-Valves , p. 108, 1930
78 FIDE Album 1914-1944/I , p. 28, 1971
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-12-11 more...
8 - P1023848
Gijsbertus Jordan
2 Chess Pie 1927
Britisch Chess Federation
Turnier 1927
Nachlass Max Meyer
Ehrende Erwähnung
P1023848
(7+11) C+
#2
1. Lc5! droht 2. De7#
1. ... Sb2,Sc3 2. Ld4#
1. ... Sf2 2. Le7#
1. ... Se3 2. Dxa1#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (8712), pin-mate, Fesselungsspiel, Valve, Bivalve
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 5N2/1r1p2p1/Rb3kP1/5p2/5P1p/6r1/5Bp1/q2nQ1K1
Reprints: 88 Valves and Bi-Valves , p. 100, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-12-12 more...
9 - P1023869
Pawel J. Neunywako
Schachmaty 1927
4. Preis
Informalturnier
P1023869
(9+11) C+
#2
1. Tc5! Sc6 2. Df4#
1. ... Se6 2. De5#
1. ... Sf5 2. Tg4#
1. ... Se2,Sc2 2. Sxf2#
1. ... Sb3 2. Dc6#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (8734), Bivalve (sS, doppelt), Unpinning, Line closing
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 2b5/5p1B/1K1Q2rN/1p4B1/p1Rnk3/2Pp1pR1/q4b2/7N
Reprints: 97 Valves and Bi-Valves , p. 109, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-24 more...
10 - P1023923
Simon S. Lewman
Leonid A. Isaev

560 The Chess Amateur 07/1928
1. Preis
C.A. Valve-Turnier 1928
Bestes Springer-Valve Problem
P1023923
(8+11) C+
#2
1. Sg5! droht 2. Se6#
1. ... Se3 2. Sf3#
1. ... Sc3 2. Td3#
1. ... Sb4 2. Sb5#
1. ... Se7 2. Lc5#
1. ... Sc7 2. Dc5#
1. ... Sf4 2. De4#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (8788), Valve (S/dreifach), Bivalve, Line closing, Theme B2
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 2r1Rb2/5NpK/1nQB1pB1/3np2p/3k3r/Nq4R1/8/8
Reprints: 104 Valves and Bi-Valves , p. 117, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-22 more...
11 - P1023924
Cyril S. Kipping
557 The Chess Amateur 06/1928
1. Preis
C.A. Valve-Turnier 1928
Bestes Bi-Valve Problem
P1023924
(11+8) C+
#2
1. Tg4! droht 2. f4#
1. ... Sf2 2. d4#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (8789), Pawn mate (Drohung+Lösung), Bivalve
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 8/1q6/3pp1Bp/1N2k2N/2P1nR1P/b4P2/1r1P2K1/Q3B3
Reprints: 119 Valves and Bi-Valves , p. 132, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-22 more...
12 - P1023927
Gustaaf Josephus Nietvelt
547 The Chess Amateur 06/1928
2. Preis
C.A. Valve-Turnier 1928
Zweitbestes Bi-Valve Problem
P1023927
(8+8) C+
#2
1. Td8! droht 2. Dd7#
1. ... e5 2. Se6#
1. ... e6 2. Se8#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (8792), Bivalve, pin-mate (zweifach)
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: R7/1Nk1pqNR/K2n1p2/P2n4/Qb6/8/7B/4r3
Reprints: 120 Valves and Bi-Valves , p. 133, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-22 more...
13 - P1023928
Gabriel Leon-Martin
The Chess Amateur 1928
3. Originality Prize
C.A. Valve-Turnier 1928
P1023928
(11+12)
#2
1. Tg5! droht 2. h8=D#
1. ... Sf3 2. Td5#
1. ... Sf1 2. Tb3#
1. ... Sb6 2. Sxb5#
1. ... Lb4 2. Sb3#

1. ... Lb6 2. Sxb5#
play all play one stop play next play all
Henrik Juel: dual 1... Dd5 2.Txd5,Tb3# (2022-04-24)
comment
Keywords: Brian Stephenson Collection (8793), Valve (Lös. 1-4), Bivalve (Lös. 5)
Genre: 2#
FEN: 1rn5/p1N1pKRP/3pP3/1rb5/3k1Pp1/p1RP4/3N1P1n/B6q
Reprints: 103 Valves and Bi-Valves , p. 116, 1930
Problemschach [Sidler] , p. 105, 1968
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-22 more...
14 - P1023929
Comins Mansfield
568 The Chess Amateur 07/1928
3. Preis
C.A. Valve-Turnier 1928
Drittbestes Springer-Valve Problem
P1023929
(9+9) C+
#2
1. Sd1! droht 2. Sdc3#
1. ... Sd7 2. Tc8#
1. ... Sg4 2. Th3#
1. ... Se8 2. Tc7#
1. ... Sh5 2. Tg3#
1. ... Ke4 2. Txe3#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (8794), Valve, Bivalve, Battery mates (vierfach), Line closing (vierfach)
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: Q5r1/6qr/p1R1pn2/1P1k1p2/5B2/4pR2/K3NN2/7B
Reprints: 106 Valves and Bi-Valves , p. 119, 1930
Complete Mansfield 1996
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-22 more...
15 - P1023933
Cyril S. Kipping
579 The Chess Amateur 08/1928
Ehrende Erwähnung
C.A. Valve-Turnier 1928
Kombination Valve/Bi-Valve
P1023933
(10+7) C+
#2
1. Sg5! droht 2. g7#
1. ... Sb1,Sd1 2. Lg2#
1. ... Sa2,Sa4 2. Ta8#
1. ... Sb5 2. b8=D#
1. ... Sd5 2. d8=D#
1. ... Se4 2. Th4#
1. ... Se2 2. Lf1#
play all play one stop play next play all
Brian Stephenson gibt 'Comins Mansfield' als Autor an, bitte prüfen! (db)
Mario Richter: Interessant ist der Kommentar in der YACPDB (https://www.yacpdb.org/#92040), letzte Klarheit dürfte aber nur ein Blick ins Original schaffen ... (2022-07-24)
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comment
Keywords: Brian Stephenson Collection (8799), Valve (zwei), Bivalve (vier), Knight's wheel (schwarz), Promotion in the mating move (wD, doppelt), Pawn mate (Drohung)
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 7k/1P1PpK1N/6P1/R4P2/1r3R2/1pn4B/3r4/q6Q
Reprints: 124 Valves and Bi-Valves , p. 137, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-23 more...
16 - P1023940
Jacob E. Funk
567 The Chess Amateur 07/1928
Preis
C.A. Valve Turnier 1928
Kombination Valve/Bi-Valve
P1023940
(8+10) C+
#2
1. Tb3! droht 2. Lb4#
1. ... Sd6 2. Se6#
1. ... Sc7 2. Lxb6#
1. ... Sd4 2. Dd5#
1. ... Sc3 2. Dxc4#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (8806), Valve, Bivalve, Line closure (vierfach)
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 2Nb2K1/n7/1q3p2/Bnk5/P1p1QN2/p3R3/2rrB3/8
Reprints: 123 Valves and Bi-Valves , p. 136, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-22 more...
17 - P1024067
Alexej N. Lebedew
Bristol Times and Mirror 1929
Lob
P1024067
(9+11)
#2
1. Sd4! droht 2. Dc8#
1. ... Lh7 2. Sh6#
1. ... d5 2. Se5#
play all play one stop play next play all
BS Problemid: 8934
Authors: Lebedev, Alexei N
Sources:
Years: 1929
SCHRECKE: C+, popeye 4.87 (2021-10-17)
comment
Keywords: Brian Stephenson Collection (8934), Valve, Bivalve
Genre: 2#
FEN: Q5br/p1p2NR1/r2pNBB1/1p6/1n3Pk1/pK3R2/8/6n1
Reprints: 86 Valves and Bi-Valves , p. 98, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2021-10-17 more...
18 - P1024139
Jewgeni I. Umnow
Schachmaty 1929
1./2. Preis geteilt
Informalturnier
P1024139
(9+12) C+
#2
1. d4! droht 2. Sd5#
1. ... exd3ep 2. Lc4#
1. ... e3 2. Lc2#
1. ... Se3 2. Ld1#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (9006), Bivalve (sB doppelt, sS), En passant, Unpinning (des wL, dreifach)
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: n1R5/p3Np1b/pkP5/p5R1/P3p2r/KB3q2/3P4/1Q3n1r
Reprints: 100 Valves and Bi-Valves , p. 112, 1930
575 FIDE Album 1914-1944/I , p. 111, 1971
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-23 more...
19 - P1025431
Michael Herzberg
1315 Lüneburger Landeszeitung 27/02/1993
P1025431
(8+14) C+
#2
1. Dd7! droht 2. Dc6#
1. ... Sh4 2. h8=D,L#
1. ... Sf4 2. Df5#
1. ... Se3 2. Lxe5#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (10309), Bivalve (dreifach), Promotion in the mating move (D,L)
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: n1Q1K1R1/2p1PN1P/5kB1/b3p3/1p4p1/2Bp2pq/6n1/4rr1b
Reprints: 8 Problemschach-Jahrbuch 1993 D , p. 12, 1993
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-05-13 more...
20 - P1025452
Franz Pachl
Jens Künzelmann

Schach-Aktiv 1993
P1025452
(10+14) C+
#2
1. dxc3? Sa5! 1. d4? Sc5! 1. dxe3? Sd6!

1. d3! droht 2. Lf3#
1. ... Sa5 2. bxc3# 1. ... Sc5 2. Sd4# 1. ... Sd6 2. Sxf4#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (10330), Albino, Bivalve (dreifach)
Genre: 2#
Computer test: SCHRECKE: popeye 4.89
FEN: bq1n4/rn1p4/1b6/1N6/1pp1BpK1/1Pp1p3/QP1PkpN1/3R1R2
Reprints: 28 Schach mit Partner , p. 65, 1999
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2024-01-07 more...
21 - P1027424
Frederick E. Gamage
Football-Field 1909
Ehrende Erwähnung
Informalturnier 1909
P1027424
(9+11) C+
#2
1. Tf3! Tc6+ 2. Tef4#
1. ... Td5+ 2. Te5#
1. ... Tb6+,Td4+ 2. Lf4#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (12308), Bivalve (sT), Provoked check, Cross check (dreifach)
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: bqQ5/b2p3B/p2rp3/8/2P1RR2/2NkB3/2p1N2K/rn6
Reprints: Simple Two-move Themes 1924
93 Valves and Bi-Valves , p. 105, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-24 more...
22 - P1030969
Antal Huszar
Deutsches Wochenschach 07/1897
P1030969
(9+6) C+
#3
1. Lg2! droht 2. f4+ Kxf6 3. Lh4#
1. ... Kxf6 2. Lh4+ Ke5 3. f4#
1. ... d5 2. Lh4+ Kxh4 3. Sf3#
1. ... Lf3 2. Lh4+ Kxh4 3. Sxf3#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (15871), Bivalve, Pawn mate, Drag-in sacrifice
Genre: 3#
Computer test: SCHRECKE: popeye 4.89
FEN: b6K/2b2p1P/3p1N1p/6kP/3N4/4PBB1/5P2/8
Reprints: 72 Valves and Bi-Valves , p. 84, 1930
114 Dom Rodzinny (Torun) 08/05/1932
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2024-03-14 more...
23 - P1031329
Leonid Ivanovich Kubbel
Stolitschnaja Potschta 1908
P1031329
(7+9) C+
#3
1. Kd2! droht 2. Kc1
1. ... g6 2. Kc2
1. ... c3+ 2. bxc3
1. ... cxb3 2. Lxb3+
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (16231), Bivalve
Genre: 3#
Computer test: SCHRECKE: popeye 4.89
FEN: R4bb1/1p2p1p1/1Pp5/4B3/1pp5/1P6/BP6/k3K3
Reprints: 75 Valves and Bi-Valves , p. 87, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2024-03-16 more...
24 - P1031729
Ado Kraemer
Deutsches Wochenschach 03/1919
P1031729
(8+9) cooked
#3
1. Lc8! Lc4 2. Sg6 Td5 3. Tf4#
play all play one stop play next play all
Die Läufer Bivalve 1. ... Lc4 verhindert die s. Verteidigung 2. ... Txc5
Cook: 1. Sg6 Txc5 2. Tf4+ Kd5 3. Td4#
more ...
comment
Keywords: Brian Stephenson Collection (16631), Bivalve
Genre: 3#
Computer test: SCHRECKE: 1 NL
FEN: 1K6/1p1B3n/1p6/1pP2R2/4k2N/3bPp2/1N3P2/2rr4
Reprints: 59 Valves and Bi-Valves 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2024-03-17 more...
25 - P1031842
Johann J. P. A. Seilberger
L'Italia Scacchistica 1922
Ehrende Erwähnung
P1031842
(10+14)
#3
1. Kd1! droht 2. Lxd5+
1. ... Sd2+ 2. Sc1+
1. ... Ld2+ 2. Se1+
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61, except for mate duals in the threat after thr. 2.Lxd5+ Lxd5
1.Kd1 e2+ 2.Dxe2+ (2021-10-17)
comment
Keywords: Brian Stephenson Collection (16746), Bivalve
Genre: 3#
FEN: 8/8/1BB1p3/p2qP2R/1Nb1k1n1/p1pNp1P1/2Q1KpP1/rn2br2
Reprints: 81 Valves and Bi-Valves , p. 93, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2021-10-17 more...
26 - P1031940
Josef Drnek
Narodni Politika 01/1924
P1031940
(7+12)
#3
1. c6! droht 2. b4+
1. ... Se5 2. Sc7
1. ... Ld6 2. Sd8
play all play one stop play next play all
SCHRECKE: Unlösbar - 1.c6 Se5 2.Sc7 f1D! (2021-10-24)
comment
Keywords: Brian Stephenson Collection (16844), Bivalve
Genre: 3#
FEN: 2K3b1/3N1p2/1R2Nrqp/k1P2p2/6nr/1P2p3/1P3p1b/8
Reprints: 61 Valves and Bi-Valves , p. 73, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2021-10-23 more...
27 - P1032188
Harry D. Rosenkilde
5009 Tijdschrift van den NSB 05/1928
3. Preis
Informalturnier
P1032188
(6+9) C+
#3
1. Sb6! droht 2. Sd7#
1. ... f5 2. De3+ Kf6 3. Txe6#
1. ... f6 2. Dg3+ Kf5 3. Lxe6#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (17094), Bivalve (sB doppelt)
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 2N2KB1/5p1r/2R1p2r/1pp1k3/8/1nN4b/5Q2/8
Reprints: 67 Valves and Bi-Valves , p. 79, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-24 more...
28 - P1032234
Lazar Zalkind
Tijdschrift van den NSB 04/1929
P1032234
(6+11) C+
#3
1. Ta4! droht 2. Tca3
1. ... g3 2. Le4
1. ... f4 2. Lf5
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (17140), Bivalve
Genre: 3#
Computer test: SCHRECKE: popeye 4.87
FEN: 8/3Kp3/7p/5p1r/1Pp3pr/R1R2p2/b1B4b/k2N4
Reprints: Valves and Bi-Valves , p. 80, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-07-21 more...
29 - P1032240
Nenad Petrovic
Sahovski glasnik 06/1930
4./5. Preis geteilt
Ursic Gedenkturnier 1929
Jugoslavian Chess Federation
P1032240
(13+10) C+
#3
1. Sf4! droht 2. Sd3
1. ... Lg4 2. Sd5
1. ... Lf3 2. Se6
1. ... Le2 2. Sxe2
1. ... Lh5 2. Sxh5
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (17146), Bivalve, Goethart-Thema, black self-obstruction
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 8/nQ2R3/2q3PB/2p1n3/2P1k2N/p1P1P2P/r1rR2N1/bB1b2K1
Reprints: 60 Valves and Bi-Valves , p. 72, 1930
813 FIDE Album 1914-1944/II , p. 150, 1972
990 Beispiele zur Ideengeschichte des Schachproblems , p. 204, 1982
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2024-03-17 more...
30 - P1037809
Alain C. White
187 Zadachi i etyudy , p. 46, 1930
Dedicated to George Hume
P1037809
(10+11)
#4
1. e4! droht 2. e5 Dxe5 3. Sc7+ 2. ... Lxe5 3. Sxc3+
1. ... d6 2. Tf7 T7xf7 3. Lf1+ 2. ... T8xf7 3. Sc7+
1. ... Tf2 2. Lxf2 Sxf2 3. Lf1+
1. ... Dd4 2. Lxd4
1. ... Tf3 2. Lxf3
play all play one stop play next play all
Beispielaufgabe für ein Internationales Valve/Bi-valve-TT von 'Zadachi i etyudy'
Henrik Juel: late duals 1... Tf2 2.Lxf2 Dd4 3.Lf1+,Lxd4, 1... Tf3 2.Lxf3 Dd4 3.Le2+,Lxd4, and 1... Dd4 2.Lxd4 Tf3 3.Lf1+,Lxf3 (2022-05-13)
comment
Keywords: Brian Stephenson Collection (22758), Plachutta, Bivalve
Genre: n#
FEN: 1n3r1q/R2p3r/N7/pkPP4/N6p/1Kp5/2P1P1Bb/6Bn
Reprints: 66 Valves and Bi-Valves , p. 78, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Mario Richter, 2022-05-14 more...
31 - P1039640
Jan Hartong
3306 Good Companions 03/1922
1. Preis
P1039640
(9+10) C+
#2
1. Sd1! droht 2. Sb2#
1. ... Sc6 2. Dc5#
1. ... Sd7 2. Dxg8#
1. ... Sf7 2. Ld5#
1. ... Sg4 2. e5#
1. ... Sf3 2. Se3#
1. ... Sd3 2. cxb3#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (24596), Bivalve (sechsfach), discovered checkmate, Pawn mate, Line closing, Blocknutzung
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: B4Qbb/2q5/6p1/pN2n3/K1k1PR1r/Bp5r/2P2N2/8
Reprints: 884 Beispiele zur Ideengeschichte des Schachproblems , p. 185, 1982
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-03-31 more...
32 - P1043971
Kurt Laue
Deutsche Schachhefte 1925
Ehrende Erwähnung
P1043971
(7+15)
#4
1. Sdf6! Lxf6 2. Dg6 Txg5 3. Sf8 e5 4. Db1#
2. ... Lg7 3. Dxg7
1. ... e5 2. Sf8 Le6+ 3. Sxe6
play all play one stop play next play all
Als Quelle wird 'German Chess Assn. Tourney 1925' angegeben, wer kennt sich aus?
'Dt. Schachhefte' habe ich nur auf Verdacht eingesetzt! (db)
Henrik Juel: many late duals (2024-03-18)
comment
Keywords: Brian Stephenson Collection (28967), Bivalve
Genre: n#
FEN: rk6/p2p1K1N/B1pPp3/3N2P1/p7/p2Qnp1b/1b4r1/5nq1
Reprints: 69 Valves and Bi-Valves , p. 81, 1930
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2024-03-18 more...
33 - P1048312
Shlomo Seider
Probleemblad 1965
1. Preis
115. Thematurnier Problemblad
P1048312
(11+11) C+
#3
1. Tcc3? Th7! 1. Tbc3? Tg8!

1. Kb2! droht 2. Td2+ Kc4 3. Tc3#
1. ... Tg8 2. Txc7 ... 3. Sb5#
1. ... Th7 2. Te3 ... 3. Se2#
play all play one stop play next play all
Breuer: Zweimal Bivalve, vermiedene weiße Holzhausen-Verstellungen.
more ...
comment
Keywords: Brian Stephenson Collection (33339), Bivalve (zweifach)
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 7q/Npn1ppr1/3p2p1/3P4/1P1kPB1n/PR4Np/2R3P1/K7
Reprints: 1689 Beispiele zur Ideengeschichte des Schachproblems , p. 341, 1982
The Art of Israeli Chess Composition 1983
As in all arts 1996
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-03-01 more...
34 - P1119001
Walter Wohlers
170 Landeszeitung für die Lüneburger Heide 03/10/1970
P1119001
(3+4) C+
#3
1. Ka4? Lc6+! 1. Dd2+? Kb3! 1. Tg2+? Lxg2!

1. Kb4! d5+ 2. Ka4 Lc2+ 3. Dxc2# 2. ... Lb1 3. Dxb1# 2. ... Lg7 3. Db3#
play all play one stop play next play all
BEU-LL
more ...
comment
Keywords: Miniature Collection (0040099), Miniature, Beugung, Preplan, Bivalve
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 5b2/8/3p4/K7/4b3/8/k7/3Q2R1
Reprints: 170 Schachbrett - 1000 Schachaufgaben der LZ , p. 70, 1989
Input: Felber, Volker, 2010-09-11
Last update: Dieter Berlin, 2022-11-21 more...
35 - P1222523
Ödön Nagy
Magyar Munkas Sakkör 1927
1. Preis
P1222523
(9+7) C+
#2
1. Da4! droht 2. Sb7#
1. ... d5 2. Se6#
1. ... e6 2. Sxd6#
1. ... e5 2. Sd7#
1. ... Te6 2. Dd7#
play all play one stop play next play all
more ...
comment
Keywords: Bivalve (vierfach)
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: K1k1N3/4pr2/1P1p2r1/p1N2qB1/3Q4/3R3B/8/2R5
Reprints: 949 Beispiele zur Ideengeschichte des Schachproblems , p. 197, 1982
Input: Felber, Volker, 2011-11-08
Last update: Dieter Berlin, 2023-02-13 more...
36 - P1234452
Michael Schreckenbach
3034 Freie Presse (Chemnitz) 29/09/1989
P1234452
(8+13) C+
#2
* 1. ... Lf7 2. Tf6#

1. Td3! droht 2. Sd8#
1. ... Sa6 2. La2#
1. ... Lf7 2. Df5#
1. ... g4 2. Dc4#
1. ... Ta2+ 2. Lxa2#
play all play one stop play next play all
more ...
comment
Keywords: Bivalve, Changed mates
Genre: 2#
Computer test: SCHRECKE: popeye 4.85
FEN: rn2br2/1N1p2B1/1ppPk1nN/4p1p1/4Q2q/5R2/1K2p3/1B6
Input: Felber, Volker, 2012-03-14
Last update: Dieter Berlin, 2023-05-28 more...
37 - P1236049
Mirko Degenkolbe
3569 Freie Presse (Chemnitz) 16/12/1994
P1236049
(7+16)
#4
1. Sxc6! droht 2. Sxe7,Txe5#
1. ... g4 2. Sd8 g5 3. Sc6 e4 4. Td1#
play all play one stop play next play all
1. Sxc6! (droht 2. Sxe7,Txe5#)
1. ... g4 (1. Bi-Valve) 2. Sd8 (droht 3. Dd3,De6#) g5 (2. Bi-Valve)3. Sc6 (droht 4. Txe5,Sxe7#) e4 4. Td1#
(MD151)
SCHRECKE: C+, Gustav 4.2a, Brute Force (2022-04-16)
comment
Keywords: Bivalve, Finnish Novotny
Genre: n#
FEN: nK6/4p2b/Q1p1p1pr/p1Pkp1pr/3N3b/1N3p1q/n4P2/4R3
Input: Felber, Volker, 2012-04-06
Last update: Felber, Volker, 2021-11-27 more...
38 - P1252603
Otto Busack
7867 Die Schwalbe 07-08/1950
P1252603
(7+10) C+
#2
1. Td2! droht 2. La6#
1. ... Le5 2. Ld5#
1. ... Lf4 2. Df1#
1. ... Lg3 2. Tc3#
play all play one stop play next play all
more ...
comment
Keywords: Bivalve
Genre: 2#
Computer test: C+ Popeye 4.61
FEN: 8/1Bp1p3/3br3/2pR1r2/K1k5/p3R2q/6Pp/3N3Q
Input: Felber, Volker, 2012-10-29
Last update: A.Buchanan, 2021-05-03 more...
39 - P1268328
Michael Herzberg
377 idee & form , p. 956, 10/1992
P1268328
(9+10) C+
#3
1. Lh1! droht 2. Td1 ... 3. Se1#
1. ... c6 2. Sg5+ Kxd4 3. Se6#
1. ... c5 2. Sh4+ Kxd4 3. Sxf5#
play all play one stop play next play all
more ...
comment
Keywords: Bivalve, Siers-Rössel, Line closing
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 1b6/2p5/1r3p2/1r3p2/pPPPkP2/4pNKp/4P1B1/2R5
Input: Felber, Volker, 2013-04-24
Last update: Dieter Berlin, 2022-11-07 more...
40 - P1268523
Gunter Jordan
12680v Springaren 127 03/2013
6. ehrende Erwähnung
PR Kjell Widlert
P1268523
(10+10)
s#3
1. De8! droht 2. Taxc3+ Lxc3 3. Sxa5+ Txa5#
1. ... g5 2. Sb6+ (2.Se5#?) Dxb6 3. Db5+ Dxb5#
1. ... Ld5 2. Se5+ (2.Sb6#?) Txe5 3. Dc6+ Lxc6#
play all play one stop play next play all
Dies ist die optimierte Fassung. Der wTa3 stand zuvor auf d3 und auf a3 stand ein zusäztlicher wB. Die Verbesserung erschien in Springaren 168, Seite 177.
Henrik Juel: C+ Popeye 4.61 also (2023-12-19)
comment
Keywords: theme A (s), Dual avoidance, Bivalve, Pinning, Sacrifice of white pieces
Genre: s#
Computer test: Popeye WINDOWS-32Bit V4.37 (168116 KB)
FEN: Q7/1N1N1b2/6pq/p6r/K1k1PP1p/R1p1P3/2R1Pp2/4b3
Input: Frank Müller, 2013-04-26
Last update: Gunter Jordan, 2023-12-19 more...
41 - P1360528
Petre Stojoski
The Macedonian Problemist 57a 09-12/2018
Zoran Gavrilovski 50 JT Abt. H#>2
1. ehrende Erwähnung
PR Hans Gruber
P1360528
(2+13) C+
h#5
1. Se5-c4+ Kb2-c1 2. Kd6-e7 La1xd4 3. Lh2-c7 Ld4-g7 4. Sc4-e5+ Kc1-b2 5. Ke7-d6 Lg7-f8#
play all play one stop play next play all
Stefan Felber: Illegale Bauernstellung! (2019-02-02)
Viktoras Paliulionis: Possible correction: bBd7.
Also, the BQ can be replaced with a BR. (2020-10-08)
comment
Keywords: Illegal position, Checking key, Minimal, Model mate, Klasinc theme (K-L, s-L, s-l, k-l), Switchback (Kks), Selfblock, Line closing, Line closing, Bivalve
Genre: h#
Computer test: Popeye 4.67
FEN: 8/3p4/2qkp3/3pn3/pp1p4/1p1r4/pK5b/B7
Input: Marcin Banaszek, 2019-02-02
Last update: Gunter Jordan, 2019-05-16 more...
42 - P1386366
Dieter Berlin
3115 Die Schwalbe 63, p. 76, 06/1980
P1386366
(9+12) C+
#2*
* 1. ... bxc3 2. Dxa2#

1. Sxa4! droht 2. Dd4#
1. ... Sc5 2. Sb6#
1. ... Sc3 2. Sb2#
1. ... Sf6 2. Txc6#
1. ... Sg5 2. Sd2#

1. Sxa4 Le3 2. Sxe3#
1. ... Dg1 2. Le2#
play all play one stop play next play all
Dieter Berlin: Über den Dual kann man lt. Lösungsbesprechung Febr.1981 geteilter Meinung sein: Ich zähle den Zug
1. ... Sd6 zu S~, und Dr. Dragone wies darauf hin, dass S~ so behandelt wird, als sei der S vom
Brett verschwunden (die Briten sagen dazu "random move"), und dann geht nur Ld:. Diese Frage ist bis heute nicht geklärt, denke ich. (2021-02-10)
more ...
comment
Keywords: Black correction, Theme B2 (zweimal), Bivalve (zweimal)
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 4r3/B1R3p1/2b3rb/K2p3R/ppk1n1q1/2N2B2/p1P5/Q4N2
Input: Dieter Berlin, 2021-02-10
Last update: Dieter Berlin, 2024-01-23 more...
43 - P1390001
Hans Peter Rehm
C26 5. WCCT 1993-1996
4. Platz
P1390001
(9+15) C+
#11
1. Da3-a6! droht 2. Dxc6#
1. ... Te4-f4 2. Da6-a5 droht 3. Dxc7#
2. ... Tf4-e4 3. Sg2-f4 Lh2xf4 4. Da5-a6 Te4-e5 5. Lb1-e4! Lf3xe4 6. Da6-a5 Te5-d5 7. Lf6-e5! Dxe5,Lxe5 8. Da5-a6 Dd6,Td6 9. Ta8-d8+! Kd7xd8 10. Da6-a8+ Kd8-d7 11. Da8-c8#
play all play one stop play next play all
more ...
comment
Keywords: Bivalve, Umnov, Pendulum
Genre: n#
Computer test: Gustav 4.1d
FEN: R7/1Kpkr1q1/2p1pBP1/2p2pP1/3pr1p1/QP2pb2/1n4Nb/1B6
Reprints: C103 FIDE Album 1995-1997 , p. 204,
Input: Marcin Banaszek, 2021-05-23
Last update: Alfred Pfeiffer, 2021-08-31 more...
44 - P1394306
Eberhard Schulze
18446 Die Schwalbe 307, p. 21, 02/2021
P1394306
(7+7) C+
#3 vv
1. Kg2? Lc6+!
1. Kh2? Lxd6+!

1. Dh7 droht 2. Df5+ Kh5 3. Dh3#
1. ... Tb5 2. Kg2 ... 3. Dh3#
1. ... Tb4 2. Kh2 ... 3. Dh3#
play all play one stop play next play all
more ...
comment
Keywords: Valve, Bivalve
Genre: 3#
Computer test: Henrik Juel: C+ Popeye 4.61 (2023-05-07)
FEN: 7Q/3nN3/3P4/6p1/b5k1/b3P3/1rp1P3/4B1K1
Input: Stefan Höning, 2021-10-04
Last update: Felber, Volker, 2023-07-01 more...
45 - P1399663
Karl Fabel
1870 Die Schwalbe 1965
1. Preis
Informalturnier 1965
Dreizüger
P1399663
(8+13)
#3
1. Sf5? gxf5! 1. e5? fxe5! 1. Ke8? Da4+!

1. Kxf7! droht 2. Sb7+ ... 3. Le6#
1. ... Tc3 2. Sf5+
1. ... Td3 2. e5+
1. ... Ta3 2. Ke8
play all play one stop play next play all
Henrik Juel: double threat, also 2.Le6
duals 1.Kxf7 De2 2.Ke8,Sb7+, 1... Tc2 2.e5,Sb7+ (2022-03-06)
comment
Keywords: half-pin, Liniensperrung, Line opening, Valve, Bivalve
Genre: 3#
FEN: 2R2K2/5pp1/p2k1ppR/2N5/1nBNPP2/1r2p3/q5r1/bb6
Reprints: 1870 Die Schwalbe 13, p. 187, 01/1969
1683 Beispiele zur Ideengeschichte des Schachproblems , p. 340, 1982
Input: Dieter Berlin, 2022-03-06
Last update: Dieter Berlin, 2023-04-28 more...
46 - P1400088
Geoffrey Arthur Mott-Smith
To Alain White 1945
Alain C. White
zum 65. Geburtstag
P1400088
(8+11) C+
#2
1. Df2! droht 2. Df7#
1. ... Se3,S~? 2. Dxb2#
1. ... Sd4! 2. Le5#
1. ... cxd6 2. Dxa7#
1. ... c5! 2. Tg5#
1. ... Df6 2. Dxf6#
1. ... De5+ 2. Lxe5#
play all play one stop play next play all
more ...
comment
Keywords: Bivalve, Valve, Black correction, Line opening, Line closing, Pinning
Genre: 2#
Computer test: Fritz 13
FEN: 5NNb/r1p3kB/p2B4/r2R3p/1n4p1/8/1qn3QK/5R2
Input: Dieter Berlin, 2022-03-29
Last update: Rainer Staudte, 2022-11-12 more...
47 - P1407947
Virgil Nestorescu
Revista Romana de Sah 1968
1. Preis
P1407947
(6+13) cooked
#3
1. Ld3! droht 2. De7+ Kxd5 3. Dxd6#
1. ... Tf3 2. Sd8! 2. Sa5? Txd3! 2. Se7? Txg5!
1. ... Te4 2. Sa5! 2. Sd8? Sf4! 2. Se7? Txg5!
1. ... Sc6 2. Sb6! 2. Sd8? Sxd8! 2. Sa5? Sxa5!
play all play one stop play next play all
Cook: 1. De7+ Kxd5 2. Dxd6+ Kc4 3. Dc5#
Gerald Ettl: sBb3 nach b4 und +sBa4, jedoch 1.-Sc6 2.Sb6 und Dd7 was im Original auch schon ging konnte ich nicht verbessern. (2023-02-25)
Gerald Ettl: Verbesserung wie oben und noch +sBa7.
Dann geht auf 1.-Sc6 2.Dd7 als einziger Zug und die Aufgabe ist vollkommen i.O. (2023-02-26)
more ...
comment
Keywords: Dual avoidance, Bivalve
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: Kn6/1N3Qp1/3p4/3NkpBn/3p1rr1/1p6/5p1q/1B5b
Reprints: 1785 Beispiele zur Ideengeschichte des Schachproblems , p. 362, 1982
Input: Dieter Berlin, 2023-02-24
Last update: Dieter Berlin, 2023-02-25 more...
48 - P1408024
Vilmos Schneider
Magyar Sakkelet 1963
1. Preis
P1408024
(12+9) C+
#3
1. Sd7! Lg6 2. Dd8 ... 3. Sde5#
1. ... g2 2. Dxg2 ... 3. Sfe5#
1. ... a6 2. Dxe8 ... 3. Sb6#
1. ... h3 2. Dxg3 ... 3. Sd2#
play all play one stop play next play all
more ...
comment
Keywords: Zugzwang-Goal, Bivalve (vierfach)
Genre: 3#
Computer test: SCHRECKE: popeye 4.87
FEN: 4bNQ1/pR2p3/4P3/2P2R1p/p1kP3p/b1P2Np1/P3K3/4B3
Reprints: 1634 Beispiele zur Ideengeschichte des Schachproblems , p. 330, 1982
Input: Dieter Berlin, 2023-03-03
Last update: Dieter Berlin, 2023-03-04 more...
49 - P1413276
Edmond Bernard
The Problemist 1979
P1413276
(9+13) C+
#2*
* 1. ... Tf4 2. Dxf4# 1. ... Lg4 2. Dxg4#

1. Lc5? Txc5 2. Sxd4# 1. ... Lxc5 2. Te5# 1. ... Sf3 2. Df4# 1. ... Lg4 2. Dxg4# 1. ... Dh8!

1. Te2! droht 2. De4#
1. ... Tf4 2. Dh5# 1. ... Lg4 2. Df6# 1. ... b6 2. Sxd4# 1. ... b5 2. Te5#
play all play one stop play next play all
more ...
comment
Keywords: Changed mates, transferred mates, Bivalve
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: q7/bp1NB2B/4P1pp/r4k2/3pR2Q/pN5b/K2P2p1/4nr2
Reprints: 14 Schweizer Schachkompositionen 1976-1986 , p. 11, 1989
Input: Dieter Berlin, 2023-10-30
Last update: Dieter Berlin, 2023-10-31 more...
50 - P1414064
Viktor Zaitsev

5. Platz
8. Belarussische Meisterschaft 2013-14
P1414064
(5+16)
h#3
b) sKf5->f4
a) 1. Sd5+ Kxd2 2. Dg6 Tc3 3. Kf6 Tf3#
b) 1. Se2+ Kc4 2. Th4 Lc3 3. Kg3 Le5#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 (2023-12-14)
comment
Keywords: discovered checkmate, Battery creation, Battery mates, double-check mate, Exchange of roles (T-L), Liniensperrung, Model mate, Checking key, Check Protection, Selfblock, x pieces move to one square, Bivalve
Genre: h#
FEN: 8/2prp1q1/4pn2/5kp1/1P2p1p1/1RK3nr/1BPp1bp1/5b2
Input: Gunter Jordan, 2023-12-14
Last update: Gunter Jordan, 2023-12-14 more...
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