Die Schwalbe

79 problem(s) found in 3327 milliseconds (displaying 79 problem(s)). [COMMENTDATE>=20220810 AND NOT K='Holzhausen' AND K='Dualvermeidung'] [download as LaTeX]

1 - P0506144
Felix Alexander Sonnenfeld
Ricardo de Mattos Vieira
1895 diagrammes 85 04-06/1988
P0506144
(4+5) C+
h#2
3.1...
1) 1. Sb5 Sd5+ 2. Kf5 Se7#
2) 1. Sc6 Sc4+ 2. Kf5 Sd6#
3) 1. Sc8 Sc2+ 2. Kf5 Sd4#
play all play one stop play next play all
Yuri Bilokin: you can see 1...Sc2+ 2.Kf5 Sd4#
1...Sc4+ 2.Kf5 Sd6#
1...Sd5+ 2.Kf5 Se7# (2023-06-26)
comment
Keywords: Dual avoidance, Tempo Move
Genre: h#
Computer test: (Popeye C-Version 3.52 (2048 KB))
FEN: 8/n7/4p1p1/4P3/4kb1K/4N3/8/4R3
Input: Markus Manhart, 1997-01-06
Last update: hpr, 1999-08-29 more...
2 - P1020845
Sergey Kryuchkov
Trud 1935
1. Preis
P1020845
(10+8)
#2
1. Sd7! droht 2. Sxf6#
1. ... Se8,Sf8 2. Sdc5# 1. ... Sxd4 2. Sbc5# 2. Sdc5?
1. ... Ld8 2. Te3# 1. ... Lxd4 2. Sd2# 2. Te3?
play all play one stop play next play all
SCHRECKE: 1. ... Sf4 2. Sdc5,Te3# (Mattdual) (2023-03-25)
comment
Keywords: Brian Stephenson Collection (5690), Somov-Thema, Black correction, Dual avoidance
Genre: 2#
FEN: 8/5Qnp/r3nb2/R2PN1p1/3Pk1P1/1NR5/8/1KB4b
Reprints: 432 FIDE Album 1914-1944/I , p. 87, 1971
1084 Beispiele zur Ideengeschichte des Schachproblems , p. 222, 1982
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-03-25 more...
3 - P1023505
Franz Pachl
Hermann Weissauer
Schach-Echo 1989
P1023505
(10+12) C+
#3
1. Td5! droht 2. Te5+ Kd7 3. Dd8#
1. ... Sd3 2. Sxd4+ Lxd4 3. Td6#
1. ... Sf3 2. Sc5+ Lxc5 3. Td6#
1. ... Txb3+ 2. Lxb3 Lxd5 3. Dxc8#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (8369), Batteriewechsel (Thema 1), Dual avoidance, double-check mate, Sacrifice of white pieces (3x S, T), Batterienutzung, mehrfache
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 2nR2Q1/bbB1pr1p/4k3/5pP1/1N1p1P2/KN5r/BPp5/4n3
Reprints: D165 Knobeln Sie auch gern? [Pachl] , p. 110, 2009
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-11-27 more...
4 - P1023559
Gilbert S. Dobbs
Tidskrift för Schack 1910
3. Preis
Informalturnier
P1023559
(4+6) C+
#3
1. Dd3! droht 2. Tca4
1. ... Kxa2 2. Ta4+ Kb3 3. Dxd1#
1. ... b1=D 2. Tb4+ cxb4 3. Dd5# 2. ... Kxb4 3. Db5# 2. ... Kxa2 3. Da6#

1. ... b1=S 2. Dc2+ Kxc4 3. Ta4#
1. ... Se3 2. Txc3+ Kxa2 3. Ta3# 2. ... Kb4 3. Tb3#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (8423), Echo, Flight giving sacrifice key, Rook sacrifice (mehrfach), Dual avoidance, Promotion (sD), under-promotion (sS)
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 8/2p5/2K5/2p5/2R5/1kb5/Rp6/1Q1n4
Reprints: 192 Versunkene Schätze , p. 87, 1998
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-09-11 more...
5 - P1024522
Rafael M. Kofman
"64" 1934
2. Platz

1. Preis
Issajew-Memorial
P1024522
(10+11)
#2
1. Sf1! droht 2. Sxd4#
1. ... Ke4 2. S5e3# 2. Se7?
1. ... Kf4 2. Se7# 2. S5g3?
play all play one stop play next play all
SCHRECKE: 1. ... Df6 2. Sh4,Dh5# (Mattdual) (2023-03-26)
comment
Keywords: Brian Stephenson Collection (9392), Flight-giving key (doppelt), pin-mate (zweifach), Dual avoidance
Genre: 2#
FEN: BB2R3/1r3R2/6Q1/r3qNP1/3p4/1n3kNP/5p1p/3bn1bK
Reprints: 583 FIDE Album 1914-1944/I , p. 113, 1971
1049 Beispiele zur Ideengeschichte des Schachproblems , p. 215, 1982
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-03-26 more...
6 - P1024524
Simon S. Lewman
British Chess Federation 1934-1935
1. Preis
P1024524
(8+9) C+
#2
1. Dg4! droht 2. Dxe6#
1. ... S6f8,S6d8 2. Dxe4# 1. ... S6g5 2. S4xe3# 2. S2xe3?
1. ... S4g5 2. S2xe3# 2. S4xe3?
1. ... S6c5 2. Sb6# 2. Sb4?
1. ... S4c5 2. Sb4# 2. Sb6?
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (9394), Dual avoidance, Black correction, Batterieabbau
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 2K1R3/8/3pn1pq/1B1k4/2N1n2p/B2bbQ2/2N5/3R4
Reprints: 355 FIDE Album 1914-1944/I , p. 75, 1971
1069 Beispiele zur Ideengeschichte des Schachproblems , p. 219, 1982
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-03-25 more...
7 - P1024583
Mark I. Adabashev
Schackvärlden 1934
1. Preis
P1024583
(10+5) C+
#2*
* 1. ... Dh7+ 2. Sc2# 2. Sf5? 1. ... Db7+ 2. Sb3# 2. Sb5?

1. Da2! droht 2. Da3#
1. ... Dh7+ 2. Sf5# 2. Sc2? 1. ... Db7+ 2. Sb5# 2. Sb3?
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (9454), Cross check, Changed mates (reziprok), Dual avoidance
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: n1R5/2q5/B1PP4/p1kN2Rn/3N4/8/7Q/1K4B1
Reprints: 1066 Beispiele zur Ideengeschichte des Schachproblems , p. 218, 1982
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-03-25 more...
8 - P1024735
Johann Viktor Ulehla
Wiener Schach-Zeitung 1935
P1024735
(7+13)
#2
1. Df5! droht 2. De4#
1. ... Le2 2. Sc2#
1. ... Se2 2. Ld2#

1. ... Sd6 2. Dxc5#
1. ... Sf6 2. Dxg5#
1. ... Dh7 2. Sxg2#
play all play one stop play next play all
Henrik Juel: double threat 2.De4,De5# (2022-08-16)
comment
Keywords: Brian Stephenson Collection (9610), Dual avoidance (zweifach)
Genre: 2#
FEN: 4n3/r3bQp1/b1B1N3/B1p3p1/6p1/4k1p1/1R4p1/K3N1nq
Reprints: 249 Problem-Palette , p. 87, 1970
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-08-16 more...
9 - P1026793
Michael Keller
2922 Die Schwalbe 1969
Informalturnier der SCHWALBE 1969
Dreizüger
3. Preis
P1026793
(10+11)
#3
1. Dc3! droht 2. Dxd3+ Kxf4 3. Df5#
1. ... gxf4 2. d6+ Dc6 3. Sf6#
1. ... Sxf4 2. Sf6+ Dxf6 3. Te3#
1. ... Txf4 2. Te3+ Dxe3 3. d6#

1. ... Kxf4 2. Db4+ Ke5 3. Txg5#
1. ... Dd4 2. d6+ Dd5 3. Db4#
play all play one stop play next play all
Henrik Juel: duals 1... De3 2.Sf6+,d6+,Txe3+,fxe3 (2023-09-27)
more ...
comment
Keywords: Brian Stephenson Collection (11674), Stocchi-Block, Dual avoidance, Cycle (2./3. Züge)
Genre: 3#
FEN: B5Nr/3p2Nb/1q4n1/1p1P2p1/4kP1r/1p1p2R1/1Q3P1P/1K6
Reprints: 2922 Die Schwalbe 9, p. 238, 06/1971
131 Michael Keller. Ein Meister der Schachkomposition [Chlubna] , p. 72, 1994
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-09-27 more...
10 - P1027177
M. Mantelli
Hampstead and Highgate Express 1904
7. ehrende Erwähnung
P1027177
(10+9)
#2
1. Sd8! droht 2. Dh8#
1. ... Txd4 2. De7# 1. ... cxd4 2. Sc4#
1. ... Sbxd4 2. Sf7# 1. ... Sexd4 2. Df4#

1. ... Kxd4 2. Sc6# 1. ... Sxg3 2. f4#
play all play one stop play next play all
Beim Nachdruck der WHZ fehlt der sBc3.
SCHRECKE: C+, popeye 4.87 (2023-06-02)
comment
Keywords: Brian Stephenson Collection (12060), Dual avoidance (zweifach), Flight giving sacrifice key, Rook sacrifice, Fluchtfeldwechsel, Block
Genre: 2#
FEN: 1K6/8/4N3/2p1k3/3RP2Q/bnp3P1/BN2nP2/1r1r1bB1
Reprints: 1379 Wiener Hausfrauen-Zeitung 25, p. 397, 18/06/1905
31 Versunkene Schätze , p. 23, 1998
Input: Brian Stephenson, 2004-08-12
Last update: Rainer Staudte, 2023-06-02 more...
11 - P1027323
Gilbert S. Dobbs
Hampstead and Highgate Express 1907
4. Preis
P1027323
(12+12) C+
#2
1. e6! droht 2. De5#
1. ... Sc6 2. Tb5#
1. ... Txd4 2. Ta5#
1. ... Lxd4 2. Lc4#
1. ... Te4 2. Da5#
1. ... Se4 2. Se3#

1. ... Sbd7,Sfd7 2. Sxe7#
1. ... Sg4 2. Sf4#
play all play one stop play next play all
vergleiche mit P1280641
more ...
comment
Keywords: Brian Stephenson Collection (12206), Selfblock, Dual avoidance, Line closing (zweifach)
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 1nN3q1/r3p3/BR1P1np1/3kPP1p/R2P3r/B2p3p/K5N1/b3Q3
Reprints: 1530 Wiener Hausfrauen-Zeitung 19, p. 302, 10/05/1908
36 Versunkene Schätze , p. 25, 1998
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-09-12 more...
12 - P1027336
Emil Palkoska
Norwich Mercury 1907
2. Preis
P1027336
(9+6) C+
#2
1. Se4? e1=D! 1. Sh5? e1=S! 1. Sxe2? b1=S!

1. Sh1! b1=D 2. Td2# 1. ... b1=S 2. Lxe2#
1. ... bxc1=D 2. Lxe2# 1. ... bxc1=S 2. Sc3#
1. ... e1=D 2. Dxa4# 1. ... e1=S 2. Sf2#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (12219), Dual avoidance, Block, Theme B2, under-promotion (sS), Promotion (sD)
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 2R5/8/8/pN3K2/p6Q/p2B2N1/Rp2p2P/2Bk4
Reprints: 1545 Wiener Hausfrauen-Zeitung 34, p. 511, 23/08/1908
39 Versunkene Schätze , p. 26, 1998
Input: Brian Stephenson, 2004-08-12
Last update: Rainer Staudte, 2023-06-02 more...
13 - P1031266
Josef Moravec
Casopis Ceskych Sachistu 1907
P1031266
(5+12)
#3
1. Sg4! droht 2. Dxb1+ Kc4 3. Se3#
1. ... Sdf5 2. Le2+ Ke4 3. Sf6#
1. ... Sef5 2. Se5+ Ke4 3. Lf3#

1. ... Ke4 2. Sf6+ Kf5 3. Lg4# 2. ... Kd3 3. Le2#
play all play one stop play next play all
Henrik Juel: double threat 2.Sf6,Dxb1+ and dual 1... a3 2.De3,Dxb1+ (2022-10-03)
comment
Keywords: Brian Stephenson Collection (16168), Dual avoidance, Remote selfblock (zweifach), Echo, Line opening
Genre: 3#
FEN: 3q4/2b1n3/3n2pN/1pp5/pp6/3k2p1/1B6/1bQBK3
Reprints: 166 Versunkene Schätze , p. 74, 1998
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-10-03 more...
14 - P1032847
Michael Keller
10185 Schach-Echo 2, p. 30, 01/1980
P1032847
(10+9) C+
#2*
* 1. ... fxg5 2. g4# 1. ... Txg5 2. Dc8#

1. Se4! droht 2. Shg3#
1. ... fxg5 2. Seg3# 1. ... Txg5 2. Sd6#

1. ... Txc3 2. g4# 1. ... Txg2 2. Dc8#
1. ... Kxe4 2. Sg3#
1. ... dxe4 2. Db5#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (17758), Changed mates, transferred mates, Dual avoidance, Pawn mate, Blocknutzung, Drag-in sacrifice, Flight giving sacrifice key, Rukhlis theme
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 8/5Kp1/Qp3pr1/n2p1kBN/3P4/2P4P/2rN2P1/1B2n3
Reprints: 4 Rochade 214, p. 20, 22/05/1982
27 Michael Keller. Ein Meister der Schachkomposition [Chlubna] 1994
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-10-27 more...
15 - P1034124
Eeltje Visserman
Limburgsch Dagblad 1940/II
1. Preis
P1034124
(11+10) C+
#2*
* 1. ... Sce6 2. Sg4# 2. Sc6? 1. ... Sge6 2. Sc6# 2. Sg4?

1. Tf4! droht 2. d4#
1. ... Sce6 2. Tf5# 2. Ld6?
1. ... Sge6 2. Ld6# 2. Tf5?
play all play one stop play next play all
Breuer: Herpai-Thema in Satz und Spiel.
more ...
comment
Keywords: Brian Stephenson Collection (19040), Herpai, Changed mates, Pawn mate (Drohung), Dual avoidance (aktiv)
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 1bq5/2n1B3/bR4r1/3Pk1nr/1N1R4/2P2p1p/3P1N1K/1BQ5
Reprints: 602 FIDE Album 1914-1944/I , p. 116, 1971
1148 Beispiele zur Ideengeschichte des Schachproblems , p. 233, 1982
Chess Wizardry [Rice] 1996
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-12-15 more...
16 - P1034579
Gerhard Paul Latzel
I Die Schwalbe , p. 253, 03/1942
Problemturnier Wehrmacht - Heimat
1. Preis
P1034579
(10+13) C+
#2
1. Se2! droht 2. Txd4#
1. ... Te6 2. De3# 2. Df4?
1. ... Tc4 2. Df4# 2. De3?
1. ... Sb4 2. Sf6# 2. Sc3?
1. ... Sxe7 2. Sc3# 2. Sf6?
play all play one stop play next play all
Breuer: Doppelsetzung des Möller-Themas mit reziprokem Mattwechsel und Dualvermeidung.

Im FIDE-Album steht der wTe7 fälschlicherweise auf e8!
more ...
comment
Keywords: Brian Stephenson Collection (19501), pin-mate (vierfach), Rook sacrifice, Changed mates (reziprok), Dual avoidance
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: B7/2qpR2K/r1r4p/p2nb2N/R2pkNP1/1p4Qp/2P2P2/2n5
Reprints: 663 FIDE Album 1914-1944/I , p. 126, 1971
1171 Beispiele zur Ideengeschichte des Schachproblems , p. 237, 1982
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-01-23 more...
17 - P1035309
Gerhard Paul Latzel
Chess 1948
1. Preis
P1035309
(7+12) C+
#2
1. Lc6! droht 2. Sf3#
1. ... Td5 2. Sb3# 2. Tc4?
1. ... Sd5 2. Tc4# 2. Sxf5?
1. ... Ld5 2. Sxf5# 2. Dg7?
1. ... d5 2. Dg7# 2. Sb3?
play all play one stop play next play all
Breuer: Viermal Thema A mit zyklischer Dualvermeidung: AB:BC:CD:DA.
more ...
comment
Keywords: Brian Stephenson Collection (20239), white move cycle, theme A, Dual avoidance
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 4r3/2n5/qp1pb2N/1r3p2/3k1P2/p2ppB2/3N2Q1/2R3K1
Reprints: Int. GM und M für Schachkompositionen , p. 106,
Schach-Echo 1, p. 16, 01/1981
1236 Beispiele zur Ideengeschichte des Schachproblems , p. 249, 1982
Chess Wizardry [Rice] 1996
Die Schwalbe , p. 128, 06/2005
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-03-21 more...
18 - P1035542
Albert Volkmann
Lippische Landeszeitung 1951
1. Preis
P1035542
(9+8) C+
#2*
* 1. Td2? droht 2. Td5#
1. ... Ke5+ 2. Scd3# 1. ... Kg5+ 2. Se4# 1. ... Th2!

1. Dd2! droht 2. Dd5#
1. ... Ke5+ 2. Sg6# 2. Sfd3? Kd5! 1. ... Kg5+ 2. Sfd3# 2. Sg6? Kh5!
play all play one stop play next play all
Breuer: Kreuzschach-Mattwechsel mit Dualvermeidung.
more ...
comment
Keywords: Brian Stephenson Collection (20474), Cross check, Changed mates, Dual avoidance
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 4B3/b6b/3pPp1r/Q1N2k2/R4Np1/6B1/2K2R2/7n
Reprints: 182 FIDE Album 1945-1955 , p. 47, 1964
1299 Beispiele zur Ideengeschichte des Schachproblems , p. 260, 1982
Schach , p. 76, 1997
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-03-18 more...
19 - P1035660
Demetrius N. Kapralos
Olympia-Turnier 1952
3. ehrende Erwähnung
Olympia Helsinki 1952
P1035660
(10+9) C+
#2*
* 1. ... Dg3 2. Se4# 2. Sb7? 1. ... Dg5 2. Sb7# 2. Se4?

1. Le6! droht 2. Sf5#
1. ... Dg4 2. Sb7# 2. Se4? 1. ... Dg5 2. Se4# 2. Sb7?
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (20593), reciprocal changed mates, Dual avoidance, theme A
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 1n5r/R2BNp2/1Kpk4/1bN5/1P3P1B/3p3Q/4R3/4r1q1
Reprints: Chess Problems: Introduction to an Art 1963
1327 Beispiele zur Ideengeschichte des Schachproblems , p. 266, 1982
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-03-17 more...
20 - P1036395
Hugo Knuppert
Skakbladet 1957
1. Preis
P1036395
(11+8) C+
#2*
* 1. ... Txe5 2. Dxd3# 1. ... Dxe5 2. Sb6# 1. ... Sxe5 2. Lxe4#

1. Sxe4! droht 2. Sg5#
1. ... Txe5 2. Df7# 1. ... Dxe5 2. Sc7# 1. ... Sxe5 2. Dc4#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (21334), Switchback (Drohung), Dual avoidance, Schiffmann defence, pin-mate (dreifach), Changed mates
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: Nq6/3pr3/2p3p1/2BkP1NR/1P2p3/1P1n4/6B1/1K2RQ2
Reprints: Die Schwalbe 1957
1464 Beispiele zur Ideengeschichte des Schachproblems , p. 294, 1982
Die Schwalbe 2003
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-03-12 more...
21 - P1038577
Arnoldo Ellerman
Good Companions 1913
1. Preis
P1038577
(7+11) C+
#2
1. Lh8! droht 2. Ke5#
1. ... c5 2. Kxe3#
1. ... Lxd5+ Kxd5#
1. ... Ld4 2. Kxd4#
1. ... g4 2. Kf4#
1. ... Sg4 2. Kf3#
1. ... Sc6 2. Sf4#
1. ... c6 2. Se7#
1. ... Sf7 2. Lh7#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (23528), discovered checkmate (wK sechsfach), Dual avoidance (zweifach)
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 1qrn2B1/bbp5/p5k1/3N2p1/4K3/4p2R/1BQ4n/6R1
Reprints: The Good Companion Two-Mover 1922
Simple Two-move Themes 1924
81 Versunkene Schätze , p. 40, 1998
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-08-27 more...
22 - P1038803
Giorgio Guidelli
Eco Degli Scacchi 1916-1917
2. Preis
P1038803
(9+10) C+
#2
1. Kf7 droht 2. Db8#
1. ... Le5+ 2. S7f5# 2. S3f5?
1. ... Lxe7 2. Lxf4#
1. ... Lg5+ 2. S3f5# 2. S7f5?
1. ... e5+ 2. S7d5#
1. ... Ke5 2. Sc4#

1. Lxf4+? e5! 2. Dxf6,Txf6 Le6!
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (23755), Cross check, Dual avoidance, Black correction, Provoked check, pin-mate, double-check mate
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 4KQ2/3pN3/1PpkpbR1/8/1P1p1r1p/4N3/b6B/2q1R3
Reprints: 1 Atputa 127 08/04/1927
158 The Week-End Problems Book , p. 158, 1932
The Two-move Chess Problem: Trad. & Dev. 1966
812 Beispiele zur Ideengeschichte des Schachproblems , p. 170, 1982
54 Schach ohne Partner für Könner , p. 65, 1982
Solving in Style [Nunn] 1985
Die Schwalbe , p. 629, 12/2006
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-04-04 more...
23 - P1054543
Andre Biollay
La Tribune de Genève 1973
P1054543
(10+8) C+
#2
1. Db7! droht 2. Lxd3#
1. ... Sc5 2. Dh7#
1. ... Sf4 2. Shg5#

1. ... Sd4 2. Sfg5# 2. Sd2?
1. ... Ld4 2. Sd2# 2. Sfg5?
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (39591), Dual avoidance, pin-mate, Blocknutzung
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 4R3/4Q3/3pn3/3rr3/Rn2k1P1/2bp1N1N/4PP2/1B3K2
Reprints: 13 Kunstschach in der Schweiz , p. 17, 1980
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-10-18 more...
24 - P1058198
Karl Hasenzahl
Problemas 1951
2. Preis
P1058198
(14+7)
#2
1. Sg6? droht 2. Te5#
1. ... Lxg6!
1. Sxf7? droht 2. Te5#
1. ... Txf7!
1. Sc4? droht 2. Te5#
1. ... Dxc4,Txc4!
1. Sc6? droht 2. Te5#
1. ... Kxd5!
1. Sf3? droht 2. Te5#
1. ... Dxd5!
1. Sd3? droht 2. Te5#
1. ... Lxd5!
1. Sg4? droht 2. Te5#
1. ... Sxd5!
1. Sd7! droht 2. Te5#
1. ... Kxd5 2. Dc6#
1. ... Dxd5 2. f3#
1. ... Lxd5 2. d3#
1. ... Sxd5 2. Lf5#
1. ... Txb5 2. Td4#
play all play one stop play next play all
SCHRECKE: C+, popeye 4.87 (2022-12-06)
comment
Keywords: Brian Stephenson Collection (43257), white self-obstruction, Dual avoidance
Genre: 2#
FEN: 4nr2/B4bN1/Q2P4/1P1RN3/1r2k3/1qn3PB/2PPPPK1/8
Reprints: FIDE Album 1945-1955 1964
36 Rochade , p. 275, 10/1977
Input: Brian Stephenson, 2004-08-12
Last update: Felber, Volker, 2013-09-15 more...
25 - P1060080
Nils Gustav Gerhard van Dijk
1496 Deutsche Schachzeitung 11, p. 382, 11/1961
1. - 3. Preis geteilt
Informalturnier Zweizüger
P1060080
(6+7) C+
#2
1. Lh8? Td7! 1. La7? Sb6! 1. La1? Sb2! 1. Lg1? f2!

1. Lf2! Se3 2. Txe3#
1. ... Sd6 2. Sxd6#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (45150), Dual avoidance, Java-Thema
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 3QN3/1b3r2/8/1R6/2nBk1p1/1R3pK1/8/4n3
Reprints: 1496 Deutsche Schachzeitung 2, p. 75, 02/1963
61 FIDE Album 1959-1961 , p. 27, 1966
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-08-26 more...
26 - P1060242
Mikhail Barulin
Shakhmatny Listok 10/1930
P1060242
(10+10) C+
#2
1. Sh3! droht 2. Sxg5#
1. ... Sce5 2. T6d4#
1. ... Sge5 2. T3d4#
play all play one stop play next play all
Breuer: Die Fesselung eines weißen Steines durch Schwarz ergibt Dualvermeidung.
more ...
comment
Keywords: Brian Stephenson Collection (45318), Theme B2, Barulin 1, Dual avoidance
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 4Q3/1P1pq3/K2R2nr/6p1/1Nn1k1P1/2BRppP1/4b3/6N1
Reprints: 1000 Beispiele zur Ideengeschichte des Schachproblems , p. 206, 1982
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-02-02 more...
27 - P1060278
Viktor Chepizhny
Due Alfieri 12/1983
2. Preis
P1060278
(11+8)
#2
* 1. ... Dd5 2. Dxd5#

1. Dg8! droht 2. Dc8#
1. ... Dxe3+ 2. Tf4#
1. ... Dxd6+ 2. Le6#
1. ... Dd5 2. Tf4#
1. ... Dd4 2. Le6#
1. ... Dxe2 2. Lxe2#
play all play one stop play next play all
SCHRECKE: C+, popeye 4.87 (2023-08-21)
comment
Keywords: Brian Stephenson Collection (45355), Changed mates, Cross check, Battery creation, Battery play, Dual avoidance
Genre: 2#
FEN: 8/4NR2/Np1P3K/1p4Qb/1pk3BR/1p2P3/1r1qP3/4B3
Reprints: 177 FIDE Album 1983-1985 1992
Input: Brian Stephenson, 2004-08-12
Last update: Rainer Staudte, 2023-08-21 more...
28 - P1061147
Franz Pachl
Hermann Weissauer
Die Schwalbe 194, p. 380, 04/2002
1. ehrende Erwähnung
181. TT der Schwalbe, Abt. 1
P1061147
(13+10) C+
#3
1. Df3! droht 2. Sge3+ fxe3 3. Dxf5#
1. ... Sbc5 2. Sb4+ Lxb4 3. Td6# 2. ... Kc4 3. Dd3#
1. ... Sbd6 2. Sf6+ Txf6 3. Tc5# 2. ... Ke6 3. Dxe4#
1. ... Ld2 3. Db3+ Lc4 3. Dxc4#
play all play one stop play next play all
Pachl: Thema C (WLK), die Themalinie ist jeweils zusätzlich von Schwarz verstellt.
more ...
comment
Keywords: Brian Stephenson Collection (46227), theme C (zweifach), Dual avoidance, pin-mate (zweifach)
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 8/1nK2p2/bPR5/3k1rP1/3PnpN1/P1b4B/P1N1pBQ1/2R1r3
Reprints: Die Schwalbe 2002
D194 Knobeln Sie auch gern? [Pachl] , p. 124, 2009
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-12-10 more...
29 - P1061152
Franz Pachl
Hermann Weissauer
Die Schwalbe , p. 381, 04/2002
3. ehrende Erwähnung
181. Thematurnier
Abteilung Dreizüger
P1061152
(13+10) C+
#3
1. Lb2! droht 2. Txg4+ Sxg4 3. f3#
1. ... Ld7 2. Sf7 Lc7 3. Sc3#
1. ... gxh5 2. Sf5 Lc7 3. Sd2#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (46232), theme G, Pawn mate (in der Drohung), Knight sacrifice (in der Drohung), Dual avoidance
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 4bnB1/8/3p1PpN/bppPP1RP/4k1p1/6P1/4KP1n/1NBR4
Reprints: Die Schwalbe , p. 381, 2002
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2022-12-10 more...
30 - P1066100
Aleksandr P. Gulaev
Österreichischer Arbeiter-Schachbund 1928
1. Preis
P1066100
(5+10) C+
#2
1. Lh2! droht 2. Sd6#
1. ... Sdc4 2. Dd3#
1. ... Sbc4 2. Df4#
1. ... Td7 2. De6#
1. ... Td4 2. De5#
1. ... Se4 2. Dh3#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (51194), Liniensperrung (fünffach), Dual avoidance (zweifach)
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 2b1N3/5rpK/1n1B2Rp/5k2/1r6/2b1Q3/3n4/2q5
Reprints: 145 Volkswacht für Schlesien 29/10/1928
142 Arbeiter-Schachzeitung (Chemnitz) 11, p. 345, 11/1928
149 Volksstimme (Chemnitz) 13/01/1962
961 Beispiele zur Ideengeschichte des Schachproblems , p. 199, 1982
Mat Plus 1994
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-02-12 more...
31 - P1090940
Petko A. Petkov
373 Phénix 06/1989
1. Preis
P1090940
(12+9)
s#4
Korrektur der 582 Rex Multiplex 1986
1. f8=S droht 2. De7+ Kxf5 3. Dxe4+ Sxe4 4. Sg3+ Sxg3#
1. f8=S Db5 2. d4+ exd3ep 3. Lg4+ Ke4 4. Df4+ Sxf4# (2. Sxd7+?)
1. f8=S Dc5 2. Sxd7+ Txd7 3. Lg6+ Ke6 4. Df6+ Sxf6# (2. d4+?)
play all play one stop play next play all
Anton Baumann: C+ Gustav 4.2a (2023-07-05)
comment
Keywords: Beseitigung hinderlicher Kraft, Beseitigung hinderlicher Masse, double-check mate, Dual avoidance, Echo-Manöver, half-battery, black, half-pin white pieces
Genre: s#
FEN: 8/2rp1P1N/2qp3P/R2nkBQK/1p2p2R/2n5/3PN1P1/B7
Input: Frank Müller, 2009-09-09
Last update: Frank Müller, 2009-09-09 more...
32 - P1140165
Roger Diot
947 L'Echiquier de Paris 11/1953
P1140165
(5+2) C+
#2
1. Sb8! b6 2. Sc6# 2. Sa6#?
1. ... b5 2. Sa6# 2. Sc6#?
play all play one stop play next play all
KW2
more ...
comment
Keywords: Miniature Collection (0015778), Minimal, Miniature, Line closing, Zugzwang-Goal, Dual avoidance
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 8/1pBN4/8/R7/1k6/3K4/2P5/8
Reprints: 3 FIDE Album 1945-1955 , p. 17, 1964
29 Schachminiaturen Zweizüger , p. 17, 1965
Input: Felber, Volker, 2010-09-11
Last update: Dieter Berlin, 2023-01-12 more...
33 - P1168736
Henri Gerard Marie Weenink
Op de Hoogte 01/10/1917
P1168736
(6+1)
#2
1. Sf6! Kf4 2. Sd7#
1. ... Kd6 2. Sg4#
play all play one stop play next play all
SAE
vf: a1<>a8, Oivind Pettersen, 1956, Dagbladet (Oslo)
Henrik Juel: double threat 2.Sd7,Sg4# gives dual after 1... Kf5,Ke6 (2023-01-15)
comment
Keywords: Miniature Collection (0308154), Aristocrat, Miniature, Rex solus, Dual avoidance, Flight-giving key (vierfach), discovered checkmate (zweifach)
Genre: 2#
FEN: 8/B4RK1/6R1/4k3/4N3/2N5/8/8
Input: Zuncke/Bruder, 2010-09-12
Last update: Dieter Berlin, 2023-01-15 more...
34 - P1179961
Waldemar Tura
Wola Gulowska 1993
1. ehrende Erwähnung
P1179961
(7+10) C+
s#2
1. Sg8! droht 2. Txf5+ Dxf5#
1. ... exf4 2. Tc7+ Se7#, 2. De7+?, 2. Sh6+?
1. ... Dxf4 2. De7+ Sxe7#, 2. Sh6+?, 2. Tc7+?
1. ... gxf4 2. Sh6+ Sxh6#, 2. Tc7+?, 2. De7+?
1. ... Lc4,Dd5,Dc4 2. Sh6+ Txh6#
1. ... Txa2 2. Sh6+ Txh6#
play all play one stop play next play all
more ...
comment
Keywords: theme Iwanow, Dual avoidance
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 3Q3B/4Nk1K/4r3/r1R1pnp1/4qRpb/3b4/B7/8
Input: Frank Müller, 2010-11-11
Last update: Dieter Berlin, 2024-02-21 more...
35 - P1180105
Kazimierz Strzala
30 Wola Gulowska 1999
1. Preis
P1180105
(4+11) C+
s#2
1. ... Dh3 2. De7+ Kxe7#
1. ... Dh3 2. Df7+ Kxf7#
1. Tf4! droht 2. Dd8+ Sxd8#
1. ... Dxf4 2. De7+ Kxe7#, 2. Df7+?
1. ... exf4 2. Df7+ Kxf7#, 2. De7+?
1. ... Dh3 2. De6+ Dxe6#
play all play one stop play next play all
more ...
comment
Keywords: Dual avoidance, Changed continuation, Königsbatterie, transferred mates
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: rnK1k1r1/pnP5/b2p1Q2/1p2p3/6R1/4q3/8/8
Input: Frank Müller, 2010-11-12
Last update: Dieter Berlin, 2024-01-02 more...
36 - P1188492
Johann Bernhard Michael Schneider
1100 Schachmatt 86 13/06/1948
P1188492
(11+8)
s#2
1. Sc6! droht 2. f5+ exf5#
1. ... Tc4 2. Dxe6+ Dxe6#
1. ... Tb4 2. Sxe5+ Sxe5#
play all play one stop play next play all
Fesselung des wBf4 als Verteidigung wird als Schädigung genutzt
SCHRECKE: Nebenlösung
1. Sxb3 droht 2. f5+ exf5#
1. ... Tc4 2. Dxe6+ Dxe6#
1. ... Sxf4 2. Df6+ Kxf6#
1. ... exf4 2. Dxe6+ Dxe6# (2023-02-25)
Gerald Ettl: Verbesserungsvorschlag: sTb3 nach d5 und wLa2 nach b3
1.Sc6! (2.f5+ exf5#)
1.-Tc4 2.Dxe6+ Dxe6#
1.-Td4 2.Sxe5+ Sxe5#
1.-Sxf4 2.Df6+ Kxf6# (2023-02-26)
Gerald Ettl: bei der Verbesserung ist der wLb2 ueberfluessig. (2023-02-26)
Gerald Ettl: Man koennte auch +wTa6 verbessern. Ich weiss nicht was besser ist? (2023-02-26)
comment
Keywords: Dual avoidance
Genre: s#
FEN: 6q1/4Q2p/4p1kP/4p3/3N1PKR/1rrn1PPP/BB6/8
Input: Frank Müller, 2011-02-27
Last update: Alfred Pfeiffer, 2018-10-24 more...
37 - P1204369
Nikolay Nadezhdin
7756 Schach 07/1975
P1204369
(9+9)
s#2
1. Sc1 droht 2. La5+ Kxa5#
1. Sc1 Ld5 2. Sd3+ Txd3# (2. c3?)
1. Sc1 Lc6 2. c3+ Txc3# (2. Sd3+?)
1. Sd4? Ld5!
play all play one stop play next play all
SCHRECKE: C+, popeye 4.87 (2023-09-17)
comment
Keywords: Dual avoidance
Genre: s#
FEN: 8/2NP4/1B1KP1n1/1B6/1k4n1/bN3br1/1pPPp2q/8
Input: Frank Müller, 2011-10-09
Last update: Frank Müller, 2011-10-09 more...
38 - P1214442
Saturnin Limbach
1308 Springaren 11/1951
P1214442
(4+7)
s#2
1. Sf5 droht 2. Df1+ Txf1#
1. Sf5 Ld1 2. De3+ (Dxc3?) Lf3#
1. Sf5 Sd1 2. Dc3+ Se3,Sxc3#
play all play one stop play next play all
SCHRECKE: C+, popeye 4.89
richtig: 1. ... Sd1 2. De3+ Sxe3#
außerdem: 1. ... Sb1 2. Dc3+ Sxc3# (2023-10-30)
comment
Keywords: Batteriematt horizontal, dentist theme, Dual avoidance
Genre: s#
FEN: 8/6N1/5N2/8/2p5/rbn4k/p7/r3Q2K
Input: Frank Müller, 2011-10-11
Last update: Frank Müller, 2011-10-11 more...
39 - P1217171
Rudolf Büchner
? 1930
1. Preis
4. Turnier der Sächsischen
Arbeiter-Problem-Komponisten 1930
P1217171
(12+9) C+
#2
1. Dg4! droht 2. Dd7#
1. ... Txc5 2. f5# 2. Se6?
1. ... Sxc5 2. Sf5# 2. f5?
1. ... Sc4 2. Se6# 2. f7?
1. ... Lc4 2. f7# 2. Se6?

1. ... Lg2,Lh3 2. Se2#
1. ... Ta7 2. Sxc6#
play all play one stop play next play all
Breuer: Vier Thema B2 Varianten mit Dualvermeidung.
Laut AZW: "1. Auszeichnung im Turnier sächsischer Arbeiter-Schachkomponisten 1930"
more ...
comment
Keywords: Theme B2 (vierfach), Dual avoidance, discovered checkmate
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 3N2BB/8/r1p2P2/r1P4R/p2k1P1Q/1np1R1N1/1n3P1K/5b2
Reprints: 310 Arbeiter-Zeitung (Wien) 26/01/1931
1001 Beispiele zur Ideengeschichte des Schachproblems , p. 206, 1982
Input: Felber, Volker, 2011-11-08
Last update: Dieter Berlin, 2023-02-02 more...
40 - P1218384
Viktor Führer
Denken und Raten 1932
1. Preis
P1218384
(11+12) C+
#2
1. Sd5! droht 2. Sc3#
1. ... Lb2 2. Scb4#
1. ... Ld2 2. Sce3#
1. ... Kxd5 2. Da8#
1. ... exd5 2. De8#
1. ... Tf3 2. dxc5#
1. ... Dh3 2. Sxf6#
play all play one stop play next play all
more ...
comment
Keywords: Unpinning (zweifach), Dual avoidance (zweifach), Sacrifice key, Drag-in sacrifice, Knight sacrifice, Blocknutzung, Unpinning, Battery mates, pin-mate
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 8/5p2/3ppp1q/2p2p2/QN1Pkr2/1P6/K1N1r1PB/1BbRR1n1
Reprints: 383 Arbeiter-Zeitung (Wien) 19/12/1932
70 Problem-Palette , p. 27, 1970
Input: Felber, Volker, 2011-11-08
Last update: Dieter Berlin, 2022-08-14 more...
41 - P1222733
Peter Takacs
Nepszava 1933
1. Preis
P1222733
(11+12) C+
#2
1. Dxf5! Sxc7,Sxe7 2. fxe3#
1. ... Sdf6 2. Dd3#
1. ... Sf4 2. De4#
play all play one stop play next play all
more ...
comment
Keywords: Dual avoidance, pin-mate, Pawn mate
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: b2r1r1B/2PQN3/BNRb4/3nqp1p/1P1k2nR/2p1pK2/5P2/8
Reprints: LXXV Ungarische Schachproblem Anthologie , p. 84, 1983
Input: Felber, Volker, 2011-11-08
Last update: Dieter Berlin, 2023-08-03 more...
42 - P1239701
Peter Sickinger
4609 Freie Presse (Chemnitz) 14/09/2007
3. ehrende Erwähnung
P1239701
(6+5)
#3
1. Lg5! droht 2. Lxh6 Kf6 3. Lg7#
1. ... Tf6 2. Sd3+ Lxd3 3. Lf4# - nicht 2. Sg6+? Txg6 3. Lf4+ Kf6!
1. ... Le4 2. Sg6+ Txg6 3. f4# - nicht 2. Sd3+? Lxd3 3. f4+ Ke4!
play all play one stop play next play all
SCHRECKE: C+, popeye 4.87 (2023-03-22)
comment
Keywords: Block, Dual avoidance
Genre: 3#
FEN: 3B4/3R4/4p2r/4kp2/5N2/5P1N/2b5/4K3
Input: Felber, Volker, 2012-05-26
Last update: Felber, Volker, 2014-10-08 more...
43 - P1242047
Edgar D. Holladay
7909 Schach-Echo 7-8, p. 124, 04/1974
Lob
P1242047
(8+8) C+
s#2
1. Df3! droht 2. Dg4+ Dxg4#
1. ... Txf3 2. g4+ (Sh6?) Dxg4#
1. ... exf3 2. Sh6+ (g4?) Dxh6#
1. ... Dxf3+ 2. g4+ Dxg4#
1. ... Sxh7 2. Sh6+ Txh6#
play all play one stop play next play all
more ...
comment
Keywords: Dual avoidance
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 5nN1/7B/4p1r1/3Npk1K/R3pq2/4r1P1/5Q2/2B5
Input: Frank Müller, 2012-06-17
Last update: Dieter Berlin, 2024-02-14 more...
44 - 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...
45 - P1273467
Michael Barth
13181 Schach 07/1994
1. ehrende Erwähnung
P1273467
(7+10) C+
s#3
1. Tb8? Se6!
1. Tb7? e6!

1. Sc8! droht 2. Sc7+ Kc5+ 3. Dc4+ Lxc4#
1. Sc8 Se6 2. Dg2+ Ke5 3. Dg5+ Sxg5# 2. Df3+?
1. Sc8 e6 2. Df3+ Ke5 3. Df5+ exf5# 2. Dg2+?
play all play one stop play next play all
more ...
comment
Keywords: Batterietransformation (s), Dual avoidance, half-battery, black
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 5nb1/N3p2p/NR1p4/p2k4/Pp1p4/1Kp5/2B1Q3/8
Input: Frank Müller, 2013-06-28
Last update: Dieter Berlin, 2024-02-26 more...
46 - P1277043
Peter Heyl
14142 Schach , p. 79, 10/1998
P1277043
(8+9) C+
s#2
1. Sb2? Ta8!
1. Se5? Se1?
1. Sf4? Da6!

1. Sf2! droht 2. Db4+? cxb4#
1. ... Ta8 2. Txc4+ Sxc4# 2. Txc2+? Dxc2!
1. ... Da6 2. Txc2+ Sxc2# 2. Txc4+? Dxc4!
play all play one stop play next play all
more ...
comment
Keywords: Option key, Dual avoidance
Genre: s#
Computer test: SCHRECKE: popeye 4.89
FEN: 7r/1n6/6q1/2pr4/Q1p4R/K1kNnN2/P1b1P3/2R5
Input: Felber, Volker, 2013-09-01
Last update: Dieter Berlin, 2024-02-28 more...
47 - P1278207
Waldemar Tura
7771 Springaren 06/1994
Lob
P1278207
(8+9)
s#3
1. Ta4 droht 2. Sc6+ Sb4 3. Dd3+ Lxd3#
1. Ta4 Sa3 2. Se6+ (Sb5?) Sc4 3. Txe3+ Dxe3#
1. Ta4 Dxe5 2. Sb5+ (Se6?) Dd4 3. Sc3+ Sbxc3#
play all play one stop play next play all
SCHRECKE: 2 Kurzlösungen in 2 Zügen: 1. Sb5+, 1. Se6+
Offenbar Fehlt sBd2. (2024-03-03)
comment
Keywords: Battery play, Dual avoidance
Genre: s#
FEN: B7/8/3Q4/3nP1q1/1R1Nk1P1/1p2pR2/2b1K3/1nrr4
Input: Frank Müller, 2013-09-24
Last update: Frank Müller, 2013-09-24 more...
48 - P1355736
Christer Jonsson
Rolf Wiehagen
Norbert Geissler
18757v Schach , p. 79, 08/2018
P1355736
(2+15)
h#2
b) sKa7
c) sKb4
d) sKf2
a) 1. Kh5 Sxf5 (Sxe8?) 2. Lg6 Sg7#
b) 1. Ka6 Sxe8 (Sxb5?) 2. Sa7 Sc7#
c) 1. Ka4 Sxb5 (Sxe4?) 2. Tb4 Sc3#
d) 1. Kf1 Sxe4 (Sxf5?) 2. Tf2 Sg3#
play all play one stop play next play all
4-fache zyklische Dualvermeidung, mit Züge-Zyklus W1/W1-Versuch. [Autoren]
Minimal -Version von P1351808.
SCHRECKE: a)-d): C+, popeye 4.87 (2022-10-15)
comment
Keywords: Dual avoidance, Echo, Minimal, Model mate, Selfblock, Umnov, white move cycle
Genre: h#
FEN: 4b3/1p6/1p1N2kp/pn3rp1/4r3/pp5K/3p4/4q1b1
Input: Gunter Jordan, 2018-10-01
Last update: Gunter Jordan, 2022-10-15 more...
49 - P1393628
Hermann Weissauer
Deutsche Schachblätter 1978
P1393628
(11+8) C+
#3
1. Da3! droht 2. De3+ Sxe3 3. fxe3#
1. ... Dxe5 2. Dd6+ Dxd6 3. Se2# 2. ... Td5 3. Lb6#
1. ... Txe5 2. Dc5+ Txc5 3. Se6#
play all play one stop play next play all
SCHRECKE: Das ist ein Dreizüger! (2021-09-12)
Gerald Ettl: Als Quelle habe ich -Deutsche Schachblaetter 1978- stehen. (2021-09-13)
Dieter Berlin: Meinen Doppelfehler habe ich korrigiert, danke für die Hinweise! (2022-12-03)
more ...
comment
Keywords: Dual avoidance
Genre: n#
Computer test: Juel: Popeye 4.61
FEN: 1q1B1Q1b/5P1K/b5B1/1r2P2R/3k1NN1/8/n1R2P2/3r1n2
Reprints: C Die Schwalbe 156, p. 221, 12/1995
Input: Dieter Berlin, 2021-09-11
Last update: Dieter Berlin, 2022-12-03 more...
50 - P1403640
Raúl Jordan
18907 Die Schwalbe 314 04/2022
P1403640
(10+15) C+
s#2
1. Dh6? Ld4 2. c4+ Lxc4#, aber 1. ... Lxc3!
1. Df3? Lxc3 2. Dd5+ Lxd5#, aber 1. ... Ld4!

1. Dh1! droht 2. Sxd6+ Lxd6#
1. ... Lxc3 2. Dd5+ Lxd5#
1. ... Ld4 2. Db1+ Lb3#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 (2023-02-13)
comment
Keywords: White correction (2. Grades, reziprok), Dual avoidance, Unpinning, half-battery, black, Option key
Genre: s#
FEN: 2NBR2n/1r1BKppn/Npqpb1p1/1k2b2Q/5p2/R1PP4/3pr3/8
Input: Gunter Jordan, 2022-08-13
Last update: Marcin Banaszek, 2023-02-16 more...
51 - P1404070
Gregory Lewis
Schach-Aktiv 1986
4. Lob
P1404070
(11+8) C+
#2
1. Se5? droht 2. Te8# 1. ... c6! 1. Lxg6? droht 2. Te8# 1. ... c5!

1. hxg6! droht 2. Te8#
1. ... c6 2. Sd4# 1. ... c5 2. Ld5#
play all play one stop play next play all
more ...
comment
Keywords: Thema B (zweifach), Dual avoidance
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 1QK2R2/r1p3p1/n2Pk1p1/6PP/2P1BP2/5N1b/8/3R2n1
Reprints: 58 Schweizer Schachkompositionen 1976-1986 , p. 25, 1989
Input: Dieter Berlin, 2022-09-06
Last update: Dieter Berlin, 2022-09-06 more...
52 - P1405683
Wolfgang Berg
1284 Landeszeitung für die Lüneburger Heide 25/07/1992
P1405683
(7+7) C+
#2
1. Dh6! droht 2. Dc6#
1. ... e1=S 2. Ld2# 2. Sd3#?
1. ... e1=D 2. Sd3# 2. Ld2#?
play all play one stop play next play all
more ...
comment
Keywords: Dual avoidance, Promotion (sD), under-promotion (sS), Thema B
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 8/8/8/B3N1QB/K2R1r2/N7/1p2p2b/1rk3n1
Reprints: 27 Problemschach-Jahrbuch 1992 D , p. 20, 1992
Input: Dieter Berlin, 2022-11-07
Last update: Dieter Berlin, 2022-11-07 more...
53 - P1405715
Rolf Wiehagen
2377 Gaudium 264 31/08/2022
Reinhardt Fiebig zum 85. Geburtstag gewidmet
P1405715
(2+5) C+
h#4
1. Sa3 (Sd6+?) Tg6 (Ta2??) 2. Sb5 Txg2 3. Kc6 Ta2 4. Ld5 Ta6#
play all play one stop play next play all
Henrik Juel: Roundtrip by Ta6 (2022-11-08)
comment
Keywords: Dual avoidance, Remote selfblock, Ideal mate, Line opening, Minimal (T), Round Trip (T-4), Selfblock, Miniature
Genre: h#
Computer test: Popeye Windows-64Bit v4.85 (4096 KB)
FEN: 2K5/8/R7/2pk4/2n5/8/6p1/7b
Input: Gunter Jordan, 2022-11-08
Last update: Gunter Jordan, 2022-11-08 more...
54 - P1406465
Hermann Weissauer
960 Die Schwalbe 20, p. 36, 1973
Dr. Ernst Bachl gewidmet
P1406465
(8+9) C+
#3
1. Ta7! droht 2. Da4+ Tb5 3. Sb4# 2. ... b5 3. Da6#
1. ... Le4 2. Td2 Ld5 3. Lxd5#
1. ... Lf3 2. Tg5 Tb4 3. Sxb4# 2. ... Ld5 3. Lxd5# 2. ... Le4 3. Lxe4#
1. ... Sd7 2. Txg6+ Sf6 3. Txf6#
play all play one stop play next play all
more ...
comment
Keywords: Entblockung, Dual avoidance, pin-mate
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 5n2/1R6/Qpk3pp/2Pb4/8/1rp5/1pN3R1/1K4BB
Reprints: D28 Knobeln Sie auch gern? [Pachl] , p. 40, 2009
Input: Dieter Berlin, 2022-12-06
Last update: Dieter Berlin, 2022-12-06 more...
55 - P1406731
Rudolf Büchner
Nepszava 1939
5. Preis
P1406731
(11+9) C+
#2
1. Sd8! droht 2. Sd7#
1. ... Sbd5 2. Se6# 2. Sb7?
1. ... Sfd5 2. Sb7# 2. Se6?
play all play one stop play next play all
more ...
comment
Keywords: Herpai, Dual avoidance
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 5B2/8/pnNP1n1r/P1k1N1R1/R5r1/Pq1B3p/1Q4bK/8
Reprints: 1135 Beispiele zur Ideengeschichte des Schachproblems , p. 231, 1982
Input: Dieter Berlin, 2022-12-14
Last update: Dieter Berlin, 2022-12-15 more...
56 - P1407591
Mikhail Barulin
Ukrain. Sportkomitee 1930
P1407591
(12+6) cooked
#2
1. b7! droht 2. Se4#
1. ... Tb6 2. f4# 2. f3?
1. ... Tb5 2. f3# 2. f4?
play all play one stop play next play all
Breuer gibt als Quelle an: "Ukrainische Schachsektion 1930".
Cook: 1. Se4+ Kc6 2. Sd4#
more ...
comment
Keywords: Dual avoidance, Isaev combination, discovered checkmate
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 5b2/p2b2r1/QP3N2/2k2N2/2P4R/P5P1/1r3P1K/6BB
Reprints: 998 Beispiele zur Ideengeschichte des Schachproblems , p. 205, 1982
Input: Dieter Berlin, 2023-02-01
Last update: Dieter Berlin, 2023-02-02 more...
57 - P1407760
Wilhelm Seib
Sydsvenska Dagbladet 1909
P1407760
(8+9) C+
#2
1. De8! droht 2. Sef5#
1. ... Txd6+ 2. Sc6# 2. Sd5?
1. ... Td4+ 2. Sd5# 2. Sc6?
1. ... Ke6 2. Sf7# 2. Sc4?
1. ... Kd4 2. Sc6# 2. Sef5?
play all play one stop play next play all
more ...
comment
Keywords: Dual avoidance, Cross check, discovered checkmate, double-check mate
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: K6B/4N3/R1QN1n2/2prk3/5pP1/1Brp1q2/4n3/8
Reprints: 683 Beispiele zur Ideengeschichte des Schachproblems , p. 145, 1982
Input: Dieter Berlin, 2023-02-11
Last update: Dieter Berlin, 2023-02-11 more...
58 - 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...
59 - P1408051
Arnoldo Ellerman
Europe Echecs 1961
1. Preis
P1408051
(10+13) C+
#2
1. Lxd5? droht 2. Sc4#/Ld4#/Dxc7#/Dxg7#/Dxh5# 1. ... Lxe4!

1. exd5! Se4 2. Sc4#
1. ... Le4 2. Ld4#
1. ... Tf5 2. Dxc7#
1. ... Lf5 2. Dxg7#
1. ... Sd3 2. Dxh5#
play all play one stop play next play all
more ...
comment
Keywords: Mehrfachdrohung (fünffach), Capture key, Task (Construction), Fleck Theme, Theme B2, Blocknutzung, Line closing, Dual avoidance
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 4N3/B1n2Qb1/4P3/K2pk2r/R3Pp1p/NB4pp/2bR1n2/2r3q1
Reprints: 1570 Beispiele zur Ideengeschichte des Schachproblems , p. 317, 1982
Input: Dieter Berlin, 2023-03-05
Last update: Dieter Berlin, 2023-03-06 more...
60 - P1408142
Arnoldo Ellerman
Skakbladet 1959
1. Preis
P1408142
(8+10)
#2*
* 1. ... T7xd5 2. Lf4# 1. ... T2xd5 2. Dh2#

1. Lxc5! droht 2. Tf5#
1. ... T7xd5 2. Ld6# 2. Ld4? 1. ... T2xd5 2. Ld4# 2. Ld6?
play all play one stop play next play all
Breuer: Mattwechsel mit Dualvermeidung und Themawechsel (maskierte Batterieabzüge statt Selbstblocks)
Henrik Juel: C+ Popeye 4.61 (2023-03-09)
comment
Keywords: Changed mates, Dual avoidance, Themawechsel
Genre: 2#
FEN: 3n4/1p1r1P2/5RK1/R1pBk3/1p2p3/2P1Bb2/3rQ3/2b5
Reprints: 1514 Beispiele zur Ideengeschichte des Schachproblems , p. 305, 1982
Input: Dieter Berlin, 2023-03-08
Last update: Dieter Berlin, 2023-03-08 more...
61 - P1408491
Janos Buglos
Raketa 1942
Raketa 1942, 1. Halbjahr
1. Preis
P1408491
(9+10) C+
#2
1. De3? S3xd5 2. Sd7# 2. Sc6? 1. ... S7xd5 2. Sc6# 2. Sd7? 1. ... Dxd5 2. Th4# 1. ... Kxd5!

1. Sd6! S3xd5 2. Sf7# 2. Sc4? 1. ... S7xd5 2. Sc4# 2. Sf7? 1. ... Dxd5 2. Txf3# 2. Tf5?
1. ... Kxd5 2. Dd4#
play all play one stop play next play all
more ...
comment
Keywords: Changed mates (reziprok), Dual avoidance, Stocchi-Block
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 1N6/1rn5/5P1p/q2Pk2K/1b2NR2/2n2p1B/4pQ1B/2r5
Reprints: 1168 Beispiele zur Ideengeschichte des Schachproblems , p. 236, 1982
525 Ungarische Schachproblem Anthologie , p. 323, 1983
Input: Dieter Berlin, 2023-03-24
Last update: Dieter Berlin, 2023-08-14 more...
62 - P1408589
Miroslav Havel
Ceske Slovo 1924
3./4. Preis
P1408589
(7+13)
#3
1. Dc6! droht 2. Dh6+ 1. ... droht 2. Le5+
1. ... Kxe3 2. Dxc5+ Kf4 3. Le5# 3. De5?
1. ... Lxe3 2. Dxc7+ e5 3. Lxe5# 3. Dxe5?
play all play one stop play next play all
Breuer: Dualvermeidung durch Fesselung der wD.
Henrik Juel: double threat and dual 1... Sc2 2.Dh6,Tf3+ (2023-03-30)
comment
Keywords: Dual avoidance, Doppeldrohung, Sacrifice key (T)
Genre: 3#
FEN: 8/K1pQpr1b/8/p1p5/5kpP/3BR2n/1B1pP3/1q2n1b1
Reprints: 911 Beispiele zur Ideengeschichte des Schachproblems , p. 191, 1982
Input: Dieter Berlin, 2023-03-30
Last update: Dieter Berlin, 2023-03-30 more...
63 - P1408613
Miroslav Havel
Surrey Weekly Press 17/03/1922
2. Preis
P1408613
(6+9)
#3
1. Dh8! droht 2. Df6+
1. ... Se4 2. Sdf5 Kxf4 3. Lxe3#
1. ... Sf3 2. Shf5 Kxf4 3. Lxe3#
1. ... Kxf4 2. De5+ Kxe5 3. Sg6#
play all play one stop play next play all
SCHRECKE: Duale
1. ... Kxh4 2. Sf5+,Dxh6+
1. ... Kh5 2. Shf5,Sdf5 (2023-03-31)
comment
Keywords: Dual avoidance, Flight-giving key, Sacrifice of white pieces (T, D), Drag-in sacrifice (D, T)
Genre: 3#
FEN: 4Q3/4K3/1B1N3p/3p2k1/5RpN/2n1p3/6pn/7b
Reprints: 887 Beispiele zur Ideengeschichte des Schachproblems , p. 185, 1982
Input: Dieter Berlin, 2023-03-30
Last update: Dieter Berlin, 2023-03-30 more...
64 - P1408749
William Bayard Rice
Hampshire Telegraph and Post 1913
P1408749
(9+9) C+
#2
1. Le5? Sf4! 1. Ld6? f4! 1. Lc7? Df4!

1. Db7! droht 2. De7#
1. ... Sf4 2. Te5#
1. ... f4 2. Sd6#
1. ... Df4 2. c7#
play all play one stop play next play all
Breuer: Vermeidung weißer Selbstbehinderung und Differenzierung nach s. Blockung von f4.
A.Buchanan: Can someone document the keywords Dual Avoidance and the opaque Theme B2, please? (2023-04-08)
Henrik Juel: Dual avoidance is best explained by looking at this problem
1... Sf4 blocks f4, so White can interfere Lb8 by 2.Te5,Sd6, apparently; but !... Sf4 also opens for Df1, so Sb5 is pinned, and the dual is avoided
B2 is one of many terms invented by Barulin & Issaev in 1922; it means block-interference, e.g., 1... f4 blocks f4, allowing 2.Sd6# to interfere Lb8; it is no longer considered a theme, because it is such a simple device
I think that 'Theme B2' should be deleted as a Keyword; it is just another one of the terms making it more difficult for beginners to read chess problem literature; the important stuff is understanding basic concepts like block, interference, and pinning (2023-04-09)
more ...
comment
Keywords: Dual avoidance, Theme B2
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: QB6/8/K1P4p/1NR2p1r/3pk3/2b4R/3Pn3/1b2Nq2
Reprints: 742 Beispiele zur Ideengeschichte des Schachproblems , p. 157, 1982
Input: Dieter Berlin, 2023-04-08
Last update: Dieter Berlin, 2023-04-08 more...
65 - P1409366
Hubert Gockel
43/93 Stern 21/10/1993
P1409366
(9+8) C+
#2
1. Dxa4! droht 2. Dc6#
1. ... Tc7 2. Ld5# 2. Sc5? 2. b5?
1. ... Td7 2. Sc5# 2. Ld5? 2. b5?
1. ... Tg5 2. b5# 2. Sc5? 2. Ld5?

1. ... Se3 2. Sd2#
1. ... d2 2. Dc2#
play all play one stop play next play all
more ...
comment
Keywords: Thema B, Dual avoidance
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 7B/6r1/4N3/R6p/pP2kbP1/3p1p2/B5n1/1K1Q1N2
Reprints: 225 Problemschach-Jahrbuch 1993 D , p. 102, 1993
Input: Dieter Berlin, 2023-05-07
Last update: Dieter Berlin, 2023-05-08 more...
66 - P1409871
Wolfgang Berg
Wochenpost 9 23/02/1995
P1409871
(8+11) C+
#2
1. Db6! droht 2. De6#
1. ... Sd4 2. Sg4# 2. Sc4?
1. ... Sg5 2. Sc4# 2. Sg4?

1. ... Ke4 2. Dd4#
play all play one stop play next play all
more ...
comment
Keywords: Dual avoidance, Unpinning, Flight-giving key, pin-mate (zweifach)
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 8/r3p3/p4p2/3Pkb1R/1Q5n/2r1Nn2/K3N1Bq/B3b3
Reprints: 366 Problemschach-Jahrbuch 1995 D , p. 152, 1995
Input: Dieter Berlin, 2023-05-21
Last update: Rainer Staudte, 2023-05-22 more...
67 - P1410450
Herbert Ahues
Stern 29 09/07/1992
P1410450
(8+8) C+
#2
1. Ka7! droht 2. Sb6#
1. ... Tf5 2. Dxb7# 2. Dxa2? 1. ... Tf6 2. Dxa2# 2. Dxb7?

1. ... Txd4 2. Db5#
1. ... Sf6 2. Sc7#
play all play one stop play next play all
more ...
comment
Keywords: Dual avoidance, Line opening, Line closing
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: N3n3/1p5B/1K1p3R/N2k4/3P4/8/bQpr1r2/6B1
Reprints: 209 Problemschach-Jahrbuch 1992 D , p. 98, 1993
Input: Dieter Berlin, 2023-06-20
Last update: Dieter Berlin, 2023-06-20 more...
68 - P1410454
Herbert Ahues
1419 Landeszeitung für die Lüneburger Heide 11/03/1995
P1410454
(10+8) C+
#2
1. Sf4! droht 2. Txc4#
1. ... Sd2 2. Sxe2# 2. Se6? 1. ... Sd6 2. Se6# 2. Sxe2?
1. ... Sxc5 2. Lxg7#
1. ... cxb3 2. Db4#
play all play one stop play next play all
more ...
comment
Keywords: Dual avoidance, pin-mate (zweifach)
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 5B2/5Nb1/6N1/2RP3p/2pkn1bR/1P2p3/2B1p3/K3Q3
Reprints: 10 Problemschach-Jahrbuch 1995 D , p. 12, 1996
Input: Dieter Berlin, 2023-06-20
Last update: Dieter Berlin, 2023-06-21 more...
69 - P1410546
Herbert Ahues
1412 Landeszeitung für die Lüneburger Heide 21/01/1995
P1410546
(7+6) C+
#2
1. Dd1! droht 2. Dxh1#
1. ... fxe5 2. Ke4# 2. Kf4?
1. ... f5 2. Kf4# 2. Ke4?

1. ... Sg6 2. Ke4#
1. ... Sf2 2. Kxf2#
1. ... Sg3 2. Kxg3#
play all play one stop play next play all
more ...
comment
Keywords: Thema B, Dual avoidance, Battery creation, discovered checkmate
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 3b3n/6p1/R4p2/4P2k/8/1Q1BBK2/6N1/7n
Reprints: 4 Problemschach-Jahrbuch 1995 D , p. 10, 1996
Input: Dieter Berlin, 2023-06-26
Last update: Dieter Berlin, 2023-06-26 more...
70 - P1410567
Herbert Ahues
Der Tagesspiegel 20/08/1995
P1410567
(10+8) C+
#2
1. Lc7! droht 2. De4#
1. ... Sg5 2. Sce7# 2. Sde7?
1. ... Sd6 2. Sde7# 2. Sce7?
play all play one stop play next play all
more ...
comment
Keywords: Dual avoidance, Thema B, Line opening
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 4R1Br/q4n2/2N1PP1p/3N1k1K/5B1Q/3P3b/8/5rn1
Reprints: 82 Problemschach-Jahrbuch 1995 D , p. 40, 1996
Input: Dieter Berlin, 2023-06-27
Last update: Dieter Berlin, 2023-06-27 more...
71 - P1410728
Herbert Ahues
Der Tagesspiegel 17/01/1993
P1410728
(7+9) C+
#2
1. Sc2! droht 2. Sd4#
1. ... dxc2 2. Dc3#
1. ... Sg2 2. Dc7# 2. Dd6?
1. ... Sg6 2. Dd6# 2. Dc7?
play all play one stop play next play all
more ...
comment
Keywords: Dual avoidance, Sacrifice key, Line opening, pin-mate
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 2K2Bb1/p7/2k1n2R/3r2p1/5n2/N2p2Q1/4p3/1R5B
Reprints: 84 Problemschach-Jahrbuch 1993 D , p. 46, 1994
Input: Dieter Berlin, 2023-07-04
Last update: Dieter Berlin, 2023-07-04 more...
72 - P1410999
Herbert Ahues
1531 Die Welt 22/05/1992
P1410999
(8+8) C+
#2
1. Dd3? droht 2. Sf3# 1. ... droht 2. Sc6#

1. Db7! droht 2. Dg7#
1. ... Dxb7 2. Sc6# 2. Sf3?
1. ... Dxh1 2. Sf3# 2. Sc6?

1. ... Lh4 2. f4#
play all play one stop play next play all
more ...
comment
Keywords: Sacrifice key, Dual avoidance, Pawn mate, Sacrifice of white pieces (D, L), double-check mate (zweifach)
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 8/7N/3pp3/p2qkp2/3N4/4P1b1/n2K1P2/BQ5B
Reprints: 314 Problemschach-Jahrbuch 1992 D , p. 150, 1993
Input: Dieter Berlin, 2023-07-19
Last update: Dieter Berlin, 2023-07-19 more...
73 - P1411576
Imre Telkes
Skakbladet 1934
2. Preis
P1411576
(12+10) C+
#3
1. a5! droht 2. Sa4
1. ... Sb2 2. Lc6 Sf6 3. Dg1# 2. Lb5? Txc4!
1. ... Sc3 2. Lb5 Se5 3. Lg1# 2. Lc6? Txb3!
play all play one stop play next play all
more ...
comment
Keywords: Dual avoidance, Liniensperrung (doppelt)
Genre: 3#
Computer test: SCHRECKE: popeye 4.87
FEN: 7b/3B4/KN1P2Q1/2kP4/PpP1n3/pP1n1N2/2r1p2B/qrR5
Reprints: 791 FIDE Album 1914-1944/II , p. 147, 1972
LXXX Ungarische Schachproblem Anthologie , p. 86, 1983
Input: Dieter Berlin, 2023-08-03
Last update: Dieter Berlin, 2023-08-04 more...
74 - P1413325
Gregory Lewis
Courrier des Echecs 1984
P1413325
(9+11) C+
#2
1. Db6? droht 2. Dd6# 1. ... Se2! 1. Db8? Sh5!

1. Dc7! droht 2. Dd6#
1. ... Se2 2. Sf6# 2. Sc3? 1. ... Sh5 2. Sc3# 2. Sf6?
play all play one stop play next play all
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comment
Keywords: Anti-Lewman, Dual avoidance
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: K1bN3B/Q2p4/4p1p1/2Pk4/p3Nn1R/3n1P1p/2R3pb/8
Reprints: 46 Schweizer Schachkompositionen 1976-1986 , p. 21, 1989
Input: Dieter Berlin, 2023-11-03
Last update: Dieter Berlin, 2023-11-03 more...
75 - P1413350
Rudolf Wüthrich
Länderkampf Bayern-Schweiz 1985
Länderkampf 1985
Schweiz-Bayern
4. Platz
P1413350
(9+14) C+
#2
1. Lc3! droht 2. Sd4#
1. ... S7c5 2. Txf6#
1. ... S7e5 2. De4#
1. ... S3c5 2. fxg5#
1. ... S3e5 2. fxe5#
play all play one stop play next play all
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comment
Keywords: Square vacation (Schlüssel), Moskau-Thema, Dual avoidance (vierfach), discovered checkmate
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 3rq3/3n4/1pR2pp1/RN3kpp/3B1P1P/p2n1Q2/p2r1N2/Kb6
Reprints: 104 Schweizer Schachkompositionen 1976-1986 , p. 41, 1989
Input: Dieter Berlin, 2023-11-04
Last update: Dieter Berlin, 2023-11-04 more...
76 - P1413380
Gregory Lewis
La Tribune de Geneve 1982
P1413380
(5+4) C+
#2
1. Sg4? droht 2. Se3# 1. ... Lc5!
1. Sf3? droht 2. Tf2# 1. ... Ta2!

1. Sc4! droht 2. Se3#
1. ... Lc5 2. Sd2# 2. Tf2?
1. ... Lg5 2. Tf2# 2. Sd2?

1. ... Te1 2. Tf2#
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comment
Keywords: Dual avoidance, Thema B (zweifach)
Genre: 2#
Computer test: SCHRECKE: popeye 4.89
FEN: 4R3/4b3/8/4N3/8/1p4B1/1R5K/r4k2
Reprints: 56 Schweizer Schachkompositionen 1976-1986 , p. 25, 1989
Input: Dieter Berlin, 2023-11-06
Last update: Dieter Berlin, 2023-11-06 more...
77 - P1415965
Armin Geister
Daniel Papack
1652 Julias Fairies 18/09/2021
2. ehrende Erwähnung
PR N. Shankar Ram
P1415965
(5+6) C+
#2v
Anti-Marscirce
1. Ta2-h1-h6? A droht 2. Ke6-e1-d1# B
1. ...Sb6-b8-a6 x 2. Df5-d1-d7# C
1. ...Sb6-b8-d7 y 2. Th6-a1-a6# D, aber 1. ... Tc4-a8-a1!
1. Ke6-e1-d1! B droht 2. Ta2-h1-h6# A
1. ... Sb6-b8-a6 x 2. Txa6# D
1. ... Sb6-b8-d7 y 2. Dxd7# C
play all play one stop play next play all
PR: "Reciprocal change in Meredith form, using an Anti-Mars specific mechanism. In the try, the wR and wQ do not observe a6 and d7, but they can move to these squares via their home squares, after the bS unguards these squares. Dual avoidance is achieved by the bS blocking each square. After the key, the wQ and wR cannot move to a6 and d7 through their home squares, but they observe a6 and d7 directly and so can capture on them after the bS arrives there. The try and key also utilise the fairy condition and show a reversal of white 1st move and threat. The bS defences also utilise the condition to move to a6 and d7 to prevent the threats via g8-f6."
Henrik Juel: The condition is not yet in the PDB, but here is the Schwalbe lexikon definition
Antimarscirce = Marsanticirce: Wie Marscirce, aber die Regel, dass die Wiedergeburt vor Zugausführung erfolgt, gilt hier (nur) für schlagfreie Züge, nicht aber für Schläge. (2024-03-19)
comment
Keywords: Circe (Anti-Mars-), Dual avoidance
Genre: Fairies
FEN: 3B1N2/2p5/1nk1K3/5Q2/2r5/8/Rb4q1/8
Input: Gunter Jordan, 2024-03-19
Last update: Gunter Jordan, 2024-03-19 more...
78 - P1416196
Michael Keller
7579 Schach-Echo 15, p. 238, 08/1973
P1416196
(5+12) C+
#4
1. Lb5! droht 2. Ld7#
1. ... axb5 2. e4+ Lxe4 3. Sxb5 ... 4. Sd6# 2. ... dxe4 3. Se2 ... 4. Sxg3#
play all play one stop play next play all
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comment
Keywords: Sacrifice key, Dual avoidance
Genre: n#
Computer test: Juel: Popeye 4.61
FEN: 8/5K2/p6B/2pppk2/1n4p1/b1N1P1p1/2n1B1b1/r7
Input: Dieter Berlin, 2024-04-05
Last update: Dieter Berlin, 2024-04-05 more...
79 - P1416274
Lars Larsen
7409 Schach-Echo 6, p. 94, 03/1973
P1416274
(11+9) C+
#2*
* 1. ... fxe3 2. Dxe3# 1. ... Sc5 2. Sxc4#

1. Dh2? Tc5!

1. Dxc4! droht 2. exf4#
1. ... Sc5 2. Dd4#
1. ... Tc5 2. Lxd5#
1. ... Lc5 2. De4#

1. ... Txb7 2. Dxf4#
1. ... fxe3 2. f4#
1. ... Lxd2 2. Ld7#
play all play one stop play next play all
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comment
Keywords: Capture key, Dual avoidance, selfpinning (weiße), Pawn mate, discovered checkmate, pin-mate
Genre: 2#
Computer test: SCHRECKE: popeye 4.89
FEN: 3r4/1Nr1R3/n3Bp2/1R1nkP2/1bp2pP1/4PP2/2KNQ3/8
Input: Dieter Berlin, 2024-04-10
Last update: Dieter Berlin, 2024-04-11 more...
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