Die Schwalbe

149 problem(s) found in 4647 milliseconds (displaying 100 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT S='Troll' AND K='Zwilling'] [download as LaTeX]

1 - P0000541
Tivadar Kardos
3398 Die Schwalbe 67 02/1981
P0000541
(13+12) cooked
BP in 6,0
1. Sf3 e5 2. Sxe5 Se7 3. Sxd7 Sec6 4. Sxb8 Dxd2 5. Dxd2 Sxb8 6. Dd8+ Kxd8
play all play one stop play next play all
Cook: 1. Sh3 d5 2. Sf4 Sf6 3. Sxd5 Se4 4. Sxe7 Sxd2 5. Dxd2 Kxe7 6. Dxd8 Kxd8
(Can transpose B1&B2)
HHS ('Schwalbe' Heft 71, Oktober 1981, S. 349): "ein schwarzer Schuft - lässt seinen Zwillingsbruder von einem weissen Söldner killen, um dessen Platz einzunehmen: ein regelrechter Krimi."
Als Vergleichsaufgaben sind in der 'Schwalbe' angegeben: G. Schweig (P0002287), Mortimer (P1394750), W. Naef & H. Klüver (P0002832)
A.Buchanan: It's curious that if we shift sK to e8 (i.e. make the position fully homebase) then it is sound as BP in 6.0! The magic of homebase! :) I don't know if it was a typo - maybe someone can check the magazine archive? (2021-10-19)
A.Buchanan: WinChloe & YACPDB don't know this composition. (2021-10-20)
Mario Richter: No typo, the position with black Kd8 was intended, the cook was found by the 'Schwalbe'-solvers (Heft 71, Oktober 1981, p. 349) (2021-10-21)
more ...
comment
Keywords: Unique Proof Game, Homebase (W), Impostor (s), Superseded by (P1394733)
Genre: Retro
FEN: rnbk1b1r/ppp2ppp/8/8/8/8/PPP1PPPP/RNB1KB1R
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2021-10-21 more...
2 - P0000574
Thomas Volet
The Problemist 11/1980
P0000574
(13+14)
Woher kamen die sTTa8 und h8?
Henrik Juel: The rooks have switched place. Following -1... Rb8:S -2.Sb6, bRb8 retracts further to g8, bBd8 retracts to f8 and bPe6 to e7, to allow wK to exit via e6; retract bRh8 to h6 and h7xRg6 etc. wPg4 cannot retract until orig. wRh1 is home. This is the only Volet retro with a K in check, composed in Tom's youth, before he saw the light! (2003-11-25)
Thomas Volet: The exception in this case to the otherwise observed constraint of not having a check in the diagram or stipulation as to who is on the move relates to a collegial colloquy at the time with with the composer J.G. Mauldon, who was active in this task. (2022-03-24)
A.Buchanan: Terrific composition! Often in a Type C composition, one might retract the check to give Type B. But the thematic Ta8 here could not exist without a check in diagram. There are different areas of design space are accessible depending upon level of self-imposed constraints. Some retro composers like Baibakov systematically explore Types B&C as well as Type A. I don't see this as any kind of defect.
I particularly like that the lock on h-file only allows one sT to squeeze itself out. (2022-03-24)
comment
Keywords: Impostor (tt), Which are original men? (tt), Interchange (tt)
Genre: Retro
FEN: r1bbn2r/Kpp3p1/3pppp1/7B/5kP1/1P6/pPPPPP1P/NQB5
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-03-24 more...
3 - P0001550
Michel Caillaud
421 Europe Echecs 295 07/1983
A. Hazebrouck gewidmet
1. Preis
P0001550
(13+12) C+
BP in 35.5
1. h4 c5 2. h5 c4 3. Th4 c3 4. Tc4 b5 5. g4 b4 6. Lg2 b3 7. Lc6 bxa2 8. b4 a5 9. b5 a4 10. b6 a3 11. La4 Sc6 12. b7 d5 13. b8=D d4 14. Dd6 d3 15. Dg6 dxc2 16. d3 fxg6 17. Ld2 c1=L 18. Db3 c2 19. La5 Lh6 20. Sd2 c1=L 21. Sf1 Lcg5 22. f4 Kf7 23. 0-0-0 a1=L 24. fxg5 a2 25. gxh6 Kf6 26. Sh2 Kg5 27. Tf1 Lf6 28. Tff4 a1=L 29. Kb1 Lae5 30. d4 Lb7 31. dxe5 Dd2 32. exf6 Te8 33. f7 Sf6 34. Dd3 Sd7 35. Ld1 Sdb8 36. Sgf3+
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5 Frolkin-Ceriani-Umwandlungen: 4 schwarze Läufer und 1 weiße Dame! Eine der bahnbrechenden frühen KBPs.
Silvio Baier: Der wesentliche thematische Inhalt ist bereits nach 31,5 Zügen erreicht. Bis dahin ist es C+ (Euclide 0.98). (2010-08-04)
James Malcom: Is this fully C+ then? (2021-01-27)
Henrik Juel: No, only the first 31.5 moves are tested OK (2021-01-27)
James Malcom: No Henrik, as in is the entire problem testable. (2021-01-27)
Henrik Juel: I guess that testing the entire problem would take an unreasonably long time (2021-04-06)
A.Buchanan: It might be possible these days: the motivation for stopping at 31.5 is that the promotion theme had been demonstrated by then. But there’s still e.g. bSb8 as random impostor (2021-04-07)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 50:24:34 Stunden.(hh:mm:ss)
Keine Lösung: BP 34.5, BP 35.0. (2023-05-08)
Henrik Juel: Thanks for your patience, Moldenhauer; more than two days... (2023-05-08)
comment
Keywords: Ceriani-Frolkin Theme (llllD), Unique Proof Game, Castling, Promotion (llllD), Impostor (s)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.11 50:24:34 Stunden.(hh:mm:ss) Keine Lösung: BP 34.5, BP 35.0.
FEN: 1n2rb1r/1b2pPpp/2n3pP/B5kP/2R2RP1/3Q1N2/3qP2N/1K1B4
Reprints: 25 Shortest Proof Games 11/1991
(1) diagrammes 103 10-12/1992
(A) Quartz 22 10-12/2002
(8-a) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2021-04-07 more...
4 - P0001629
Andrey Frolkin
498 Europe Echecs 355/356 07-08/1988
2. ehrende Erwähnung
P0001629
(14+14) C+
BP in 26,5
1. Sc3 c5 2. Sd5 c4 3. Sxe7 c3 4. Sg6 hxg6 5. Sf3 Th5 6. Sd4 Ta5 7. Sb5 f5 8. Sa3 Df6 9. Sb1 La3 10. Tg1 d6 11. Th1 Ld7 12. Tg1 La4 13. Th1 Kd7 14. Tg1 Kc6 15. Th1 Kb5 16. Tg1 Sc6 17. Th1 Te8 18. Tg1 Te3 19. Th1 Td3 20. cxd3 c2 21. Tg1 cxd1=S 22. Th1 Sc3 23. Tg1 Se4 24. Th1 Dc3 25. Tg1 Sgf6 26. Th1 Se8 27. Tg1
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Moldenhauer: Computerprüfung: C+ Stelvio 1.11 1 Sekunde.
Keine Lösung: BP 25.5, BP 26.0. (2023-04-02)
comment
Keywords: Unique Proof Game, Non-standard material, Pendulum (T x15), Promotion, Impostor (S)
Genre: Retro
Computer test: Stelvio 1.11
FEN: 4n3/pp4p1/2np2p1/rk3p2/b3n3/b1qP4/PP1PPPPP/RNB1KBR1
Reprints: 502 Europe Echecs 358 10/1988
102 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2023-05-02 more...
5 - P0003195
Thomas R. Dawson
2130 Die Schwalbe 07/1932
P0003195
(14+14) C+
h#2
WTM
1. ... bxc6ep 2. Da7 c7#
retro tries:
1) 1. Lxg3 b6 2. Lxd6 Lxd6#
2) 1. Dc6 b6 2. Dc7 dxc7#
3) 1. Ta7 f8=D,f8=T 2. Ka8 Dxc8#,Txd8# ("untolerated" dual)
R: 1. ... c7-c5 2. b4-b5 Dc4-a6 (move order variable beyond this point) 3. b2-b3 Ta6-a8 4. d5-d6 Te6-a6 5. b3-b4 Te8-e6 6. a2xSb3 Th8-e8 7. d4-d5 Lb4-e1 8. d3-d4 Lf8-b4 9. Kg5-h5 e7xSf6+
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Missing: Wh: SS Bl: SS
Pawn captures: Wh: axb, hxg Bl: exf, fxg
bPf6 comes from e7, else collision with wPf7. So can't uncapture fxg2 until wP retracted. White has 6 pawn retractions before retro-pat, just giving Bl time to put Le1 & Ta8 (impostor) back home, and uncapture exf6. So Black must retract first, and it's WTM. sD must clear out of the way, and c4 is the only possible square, wPaxSb can't happen on b5, or it would block sD. And axSb4 would block sLe1. It was axSb3. So wPb5 must retreat to b4, and thus Black cannot play R: 1. Lb4-e1. So neatly R: 1. c7-c5 is forced.
Ladislav Packa: Is wRh1 needed? (2021-10-22)
Mario Richter: Yes, wRh1 is needed - without it the ep-key would not be justified (last moves could have been R: 1. ... Th1-g1 2. Lg1-h2 or even R: 1. ... Ld2xTe1). (2021-10-23)
A.Buchanan: + three mostly clean retro tries. (2021-10-24)
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comment
Keywords: En passant as key, No legal last move for White, Impostor (t)
Genre: h#, Retro
Computer test: HC+ Popeye v4.87 & simple retro-logic
FEN: rkb5/1p1p1Ppp/q2P1p2/pPp4K/6PR/1P4PQ/2P1P1pB/4bBrR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-12-08 more...
6 - P0003384
Tivadar Kardos
4299 Stella Polaris 12/1971
P0003384
(9+16) C+
h#2
b) alles eine Reihe nach links
a)
1. gxf3ep Sxg7 2. d5 Lf5#
1. cxd3ep? Sxc7 2. f5 Ld5#
b) 1. bxc3ep Sxb7 2. e5 Lc5#
1. fxe3ep Sxf7 2. c5 Le5#
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Sally: a)Der letzte Zug war: Bf2 - f4!
b)Der lrtzte Zug war: Bc2 - c4!
Nr. 139 200 Ausgwwählte S. Pr. T. Kardos (W. Frentze 1983) (2010-09-30)
Henrik Juel: Black pawns captured all 7 missing white men, incl. [Pa1], which promoted on a8
Only possible last moves are d2-d4 and f2-f4
In each twin the closing off for an original white bishop determines the last move (2021-11-22)
Henrik Juel: HC+ Popeye 4.61 (2021-11-22)
comment
Keywords: En passant as key, Twin by board shift
Genre: h#, Retro
Computer test: HC+ Popeye v4.87 & Retractor 2.1.1 Human contribution is "positions prior to retractions look legal enough."
FEN: 2bKNb2/2rn1pqn/3pBp2/4B1P1/2pPkPpr/2p1p3/1P2p2P/8
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-11-27 more...
7 - P0003444
Janko Furman
Miroslav Stosic

7273 Schach-Echo 11/1972
P0003444
(8+14) cooked
h#2
b) Gespiegelt (a1<->h1) & wKd1->e1
a) 1. dxe3ep 0-0 2. Te4 Txf3#
b) 1. exd3ep 0-0-0 2. dxe2 Ld5#
play all play one stop play next play all
Cook: a) 1. Kg3 Kf1 2. Df4 Th3#
1. Kg3 0-0 2. Dh4 Txf3#
A.Buchanan: This is a very heavy position to prevent the possibility of R: 1. c2xb3. I'm not sure why this was done. A much lighter position 8/8/8/5np1/1r1pPkr1/2Bp1p2/1p1P2P1/4K2R with 7 less units achieves the mates soundly. Am I missing something? (2022-02-16)
comment
Keywords: a posteriori (AP) (Type Petrovic), En passant as key, Castling (wk,wg), Superseded by (P1399967), Twinning by board reflection
Genre: h#, Retro
FEN: 8/1p1pp1p1/8/5nq1/1r1pPkr1/1PBp1p2/Pp1P2P1/2n1K2R
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-03-23 more...
8 - P0003720
Yuri Markovic Gordian
4496 Schach , p. 30, 01/1964
P0003720
(7+9) C+
h#2
b) sBh7 nach a7
a) 1. 0-0 Tcg3 2. Sh8 Txg7#
b) 1. 0-0-0 Tgc4 2. Sb8 Txc7#
play all play one stop play next play all
more ...
comment
Keywords: Castling, Cant Castler, Obvious promotion (T), Twin
Genre: h#, Retro
Computer test: HC+ Popeye 4.61
FEN: r3k2r/1pp3pp/2n3n1/8/6R1/2R4P/4P1P1/5B1K
Input: Gerd Wilts, 1995-06-03
Last update: Gunter Jordan, 2022-12-01 more...
9 - P0008442
Stanislav Vokal
Kotesovec-40 JT 29/07/1996
1. Lob
P0008442
(10+14)
#2
b) gespiegelte Position
A.Buchanan: I guess that the two castlings are intended to be mutually exclusive, but I can't see why that would be. (2022-05-27)
comment
Keywords: Twinning by board reflection
Pieces: du = Grasshopper (G)
Genre: Retro, Fairies
FEN: bb2k2r/1rp1*2q*2Q*2q1/n6p/8/n3p1p*2Q/4p3/1PP1P1PP/R3KR2
Input: Gerd Wilts, 1996-10-03
Last update: A.Buchanan, 2023-06-02 more...
10 - P0008872
Denis M. Saunders
C9206 The Problemist 03/1998
P0008872
(12+14) C+
#2?
b) -sBe7
a) 1. 0-0-0? illegal
1. Td1! droht 2. Dc4#
1. ... Se3 2. Dxe3#
1. ... Se5 2. Dxe5#
1. ... cxb5 2. Txb5#
1. ... Tf4 2. Dxe7#
1. ... Dxc2 2. Txc2#
1. ... Dd3 2. Sxd3#
1. ... De4+ 2. Sxe4#
b) 1. Td1? Te8! pinning
1. ... Te7? 2. Dxe7#
1. 0-0-0! then all variations as in a)
play all play one stop play next play all
(a) sLa7 is promoted. If White castling rights remain, then bPf captured fxgxh2xg1=L, which with dxc6 makes 4 captures. White has lost Bd, Be, Bf/h & Lc. However, wBe can't have captured or promoted (h/fxg & Lf at home are the only Black casualties), so can't have contributed to Black captures. Therefore impossible, and wK did lose castling rights before. Now trivial for sBf to have promoted.
(b) sLa7 can be original, so castling is still ok. Even if sLa7 is promoted, wBe can have promoted, and again White can still castle.
The forward play is more varied than is usual in these kinds of problems.
Kees: a) 1.Td1! [2.Dc4‡]


b) 1.0-0-0! [2.Dc4‡]

La7 is promoted.
In a) fxg/e=L King must move (e2 cannot promote) so no 0-0-0.
In b) fxgxhxg=L and 1. 0-0-0 for 1. Td1? Te8! (2022-02-02)
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comment
Keywords: Castling, Castling key, Twin
Genre: Retro
Computer test: HC+ Popeye 4.61 and analysis
FEN: b6r/b1p1prpq/1pp1Q2p/1Pk5/p5n1/P4NP1/1RP2NP1/R3KB2
Input: Gerd Wilts, 1998-06-26
Last update: A.Buchanan, 2022-02-03 more...
11 - P0009046
Peter Wong
9923 Die Schwalbe 169 02/1998
4. Preis
P0009046
(15+14) C+
BP in 23.0
1. e4 a5 2. Ke2 a4 3. Kf3 a3 4. Kg4 axb2 5. a4 Ta6 6. a5 Ta7 7. a6 Ta8 8. a7 Sc6 9. Ta6 Sb8 10. Th6 g6 11. axb8=S Lg7 12. Sa6 Lc3 13. dxc3 Kf8 14. Dd4 De8 15. Da4 Kg7 16. Lc4 Df8 17. Se2 Dd8 18. Td1 Kf8 19. Td6 Ke8 20. Tf6 e6 21. Sd2 Se7 22. Sf3 Sc6 23. Sfg1 Sb8
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Je 3zügiger Tempoverlust von sTa8 und sDd8, dazu Platzwechsel (wSb1 nach g1, sSg8 nach b8) und Switchback (sSb8 und sKe8). Hervorragend!
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 in 1 Sekunde.
Keine Lösung: BP 22.0, BP 22.5. (2023-03-27)
comment
Keywords: Unique Proof Game, Non-standard material, Switchback (sk), Tempo Loss (t3s2d3), Impostor (Ss)
Genre: Retro
Computer test: Stelvio 1.11
FEN: rnbqk2r/1ppp1p1p/N3pRpR/8/Q1B1P1K1/2P5/1pP1NPPP/2B3N1
Reprints: feenschach 141 06/2001
(70) Parallel Strategy 2004
H52 FIDE Album 1998-2000 2007
Input: Gerd Wilts, 1998-06-26
Last update: Silvio Baier, 2023-04-05 more...
12 - P0568158
Harald Grubert
4380 Thema Danicum 55 07/1989
Preis
Neujahrsturnier
P0568158
(3+5) C+
h#4
b) sLb5->f5
a) 1. Lc4+ Kc3 2. Le5+ Kd2 3. Kd4 f3 4. d5 c3#
b) 1. Tc6 f4 2. Lc5 Kc3 3. Le6 Kd3 4. d6 c4#
play all play one stop play next play all
Henrik Juel: The theme for this tourney was unusual:
All white men stand on the bottom half, and all the black men stand on the top half of the board (2021-12-24)
comment
Keywords: Reihen-Echo, Twin, Chameleon Echo, Ideal mate, Selfblock, Pawn mate, Pawn step variations
Genre: h#
Computer test: (Popeye C-Version 3.52 (2048 KB))
FEN: 8/3p4/3b4/1brk4/8/1K6/2P2P2/8
Reprints: 11 Hilfsmattvierer , p. 6, 2000
Input: Ralf Binnewirtz, 1999-03-15
Last update: Gunter Jordan, 2021-12-24 more...
13 - P0577550
Johann J. Chaschtschanski
14447 Schach , p. 79, 03/2000
P0577550
(3+9)
h#7
b) sTc2 nach h6
a) 1. Txg2 Kxg2 2. Ld4 Kh1 3. Le5 fxe5 4. Kf4 e6 5. Kg5 e7 6. Kh4 e8=D 7. Kh3 Dxh5#
b) 1. gxf3ep gxf3 2. Ke5 Kg2 3. Le4 fxe4 4. Kf6 exf5 5. Kg7 f6 6. Kh8 f7 7. Th7 f8=D#
play all play one stop play next play all
Anton Baumann: C+ Gustav 4.1d (2020-11-24)
comment
Keywords: Switchback (K in a), Entblockung, Promotion (D), Promotion in the mating move (D in b), Twin, En passant as key, Selfblock (in b), Corner mate (in b), Model mate (in b)
Genre: h#, Retro
FEN: 8/8/8/5p1p/4kPp1/3bb1p1/2r3Pp/7K
Input: hpr, 2000-10-27
Last update: Gunter Jordan, 2020-11-25 more...
14 - P1000642
Satoshi Hashimoto
R048 Probleemblad 03/1999
3. Preis
P1000642
(14+15) C+
BP in 23,0
1. e4 Sf6 2. Df3 Sh5 3. Df6 exf6 4. e5 Ld6 5. e6 0-0 6. e7 Sc6 7. e8=D Tb8 8. De4 Te8 9. Ld3 Te5 10. Se2 Tb5 11. 0-0 Tb3 12. axb3 Kf8 13. Ta6 bxa6 14. Da4 Tb5 15. Le4 Te5 16. d3 Te8 17. Lf4 Ke7 18. Sd2 Th8 19. Ta1 Ke8 20. Kf1 Lf8 21. Ke1 Se7 22. Sf1 c6 23. Lb8 Sg8
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Weiß und Schwarz haben klein rochiert, wTa1 stammt von h1, sTh8 stammt von a8.
Henrik Juel: Natch 3.1 did nothing in almost an hour (2018-12-13)
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comment
Keywords: Unique Proof Game, Impostor (Tts), Switchback (Kkl), Castling, Promotion
Genre: Retro
Computer test: Moldenhauer: Computerprüfung: C+ Stelvio 1.11 84:43:01 Stunden. (hh:mm:ss) Keine Lösung: BP 22.0, BP 22.5. Oder auch Stelvio 2.1 in 25min.
FEN: 1Bbqkbnr/p2p1ppp/p1p2p2/7n/Q3B3/1P1P4/1PP1NPPP/R3KN2
Reprints: feenschach 153, p. 195, 10-12/2003
82 Die Schwalbe 250A, p. 260, 08/2011
7 64 Proof Games 2012
Input: Gerd Wilts, 2000-08-01
Last update: Reto, 2024-03-10 more...
15 - P1000659
Michel Caillaud
R071 Probleemblad 11/1999
P1000659
(11+15)
KBP 27,5
1. e4 h5 2. Dg4 hxg4 3. Sf3 gxf3 4. Le2 fxe2 5. Tf1 exf1=L 6. b4 La6 7. b5 Th3 8. bxa6 b5 9. La3 Lb7 10. Ld6 exd6 11. Sc3 Le7 12. Se2 Lf6 13. Sg1 Lc3 14. e5 La5 15. e6 Tc3 16. h4 Le4 17. h5 Sc6 18. h6 Tb8 19. h7 Tb7 20. h8=D Db8 21. Dh5 Sd8 22. Dd1 f6 23. e7 Kf7 24. e8=S c6 25. Sc7 b4 26. Sb5 b3 27. Sa3 b2 28. Sb1
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sBh7 schlägt DSLT. wDd1 und wSb1 sind Phönixfiguren, wSg1 ist wSb1.
Moldenhauer: Computerprüfung: C+ Stelvio 1.5 in 147:43:15 Stunden.(hhh:mm:ss)
Keine Lösung: BP 27.0 in 49:30:01 Stunden. (2023-08-17)
comment
Keywords: Ceriani-Frolkin Theme (l), Unique Proof Game, Pronkin Theme (DS), Impostor (S)
Genre: Retro
FEN: 1q1n2n1/pr1p1kp1/P1pp1p2/b7/4b3/2r5/PpPP1PP1/RN1QK1N1
Reprints: H35 FIDE Album Annexe 1998-2000 2009
Input: Gerd Wilts, 2000-08-01
Last update: Gerd Wilts, 2009-07-25 more...
16 - P1008813
Klaus Wenda
10726 Die Schwalbe 182 04/2000
P1008813
(6+7)
h#2
Circe
a) Diagramm
b) vertikal gespiegelt
wDL=Nonstop-Equihopper
a) 1. gxf1=L[+wNOf8]! NOxf1[+sLc8] 2. e3 (Le3?) NOxb4[+sDd8]#
b) 1. bxa1=T[+wNOa8]! NOxa1[+sTh8] 2. Ld3 (d3?) NOxg4[+sDd8]#
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Ein sehr circetypischer (hinsichtlich der Spiegelung) Mechanismus mit UW/Blockwechsel. Eine prima Aufgabe (EB)!
MR: Die Dualvermeidung beim Block e(d)3 sowie der sUmwandlungs- und der wFunktionswechsel sind brilliant miteinander verwoben. Leider bleibt der Mattzug von der ganzen Spiegelfechterei unbeeindruckt.
Anton Baumann: C+ Alybadix
Informalturnier 2000: 1. Lob (2023-09-26)
comment
Keywords: Circe, Twinning by board reflection
Pieces: dl = Nonstop Equihopper (NO)
Genre: Fairies
FEN: 1k4*3Q1/7K/1P6/p7/1q1bp3/8/6p*3Q/5*3Qr*3Q
Reprints: M25 ASymmetrie 2013
Input: Gerd Wilts, 2003-07-01
Last update: Alfred Pfeiffer, 2014-01-16 more...
17 - P1008913
Rolf Wiehagen
Achim Schöneberg

10906 Die Schwalbe 185 10/2000
P1008913
(8+6) C+
ser-h#4
b) +wTb3 (-wLb3)
a) 1. Ta4? 2. Txd4 3. Txe4 4. Txe6+ Lxe6+ 5. Lxe6!
1. Lb1! 2. Ld3 3. Lc4 4. Lxe6 Lxe6#
b) 1. Lb1? 2. Ld3 3. Lxe2 4. Lxf3 Txf3+ 5. Txf3!
1. Ta4! 2. Txd4 3. Td3 4. Txf3 Txf3#
play all play one stop play next play all
Die beiden Autoren machten den Vorschlag, unter das Diagramm das aus dem orthodoxen Bereich bekannte "v" zu setzen. Dies widerstrebte mir dann doch. Ein diesbezüglicher Hinweis im Vorspann mußte genügen.
Autoren: Rehm-Thema, diagonal und orthogonal mit eindeutigen thematischen Verführungen durch den jeweils "falschen" Hinterstein.
AB: Sehr leicht zu durchschauendes Peri-Manöver.
Schwarz-weiße Opferbahnungen nach einleitenden Umschiffungen des jeweiligen wWirkungssteins (HJ).
Anton Baumann: Informalturnier 2000: 3. Lob (2023-09-26)
more ...
comment
Keywords: Seriesmover, Twin, Rehm Theme, bi-coloured Bristol, Periführung, Entblockung
Genre: Fairies
Computer test: Gustav 4.1d
FEN: 8/8/2K1P3/p6p/3PPQ2/rB3P1k/b3P1n1/8
Input: Gerd Wilts, 2003-07-01
Last update: Arnold Beine, 2022-10-31 more...
18 - P1013083
Roberto Osorio
Jorge Joaquin Lois
Oscar Cuasnicú

R230 Probleemblad 02/2004
3. Lob
P1013083
(15+15) C+
BP in 21,5
1. g3 Sa6 2. Lg2 Tb8 3. Lc6 bxc6 4. Sf3 Tb3 5. 0-0 Ta3 6. bxa3 e6 7. Lb2 Le7 8. Ld4 Lh4 9. Sc3 Dg5 10. Tb1 Se7 11. Tb8 0-0 12. Db1 Lb7 13. Te8 Sg6 14. Te7 Ta8 15. Te8+ Sf8 16. Td8 Lc8 17. Db7 Db5 18. Ta1 Db1+ 19. Se1 Dd1 20. Sb1 Sb8 21. Lb2 a6 22. Lc1
play all play one stop play next play all
Aufwändige Manöver zum Einschleusen des wTa1 nach d8 und der sD nach d1. wTa1/sTa8 sind wTh1/sTh8.
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:10:35 Minuten. (hh:mm:ss)
Keine Lösung: BP 20.5, BP 21.0. (2023-03-16)
comment
Keywords: Unique Proof Game, Promenade, Interchange, Castling (2), Switchback (LSls), Impostor (Tt)
Genre: Retro
Computer test: Stelvio 1.11
FEN: rnbR1nk1/1Qpp1ppp/p1p1p3/8/7b/P5P1/P1PPPP1P/RNBqN1K1
Reprints: (81) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 2004-02-20
Last update: Silvio Baier, 2023-03-20 more...
19 - P1013131
Eric Pichouron
R138 Problemesis 38 04/2004
P1013131
(16+13) C+
BP in 22,0
1. c4 a5 2. c5 a4 3. c6 a3 4. cxb7 Sc6 5. bxa8=T La6 6. Da4 Db8 7. Dh4 Kd8 8. g4 Kc8 9. Lg2 Kb7 10. Le4 Da7 11. Txf8 Sf6 12. Ta8 Tb8 13. Lc2 Kc8 14. d3 Kd8 15. Lh6 Tc8 16. Tb8 Ke8 17. Tb6 Ta8 18. Sd2 Db8 19. Tc1 Dd8 20. Lb1 Sb8 21. Tcc6 Sg8 22. Tf6 Lc8
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Interchange, Switchback (kdlss), Impostor (t)
Genre: Retro
Computer test: Computerprüfung: C+ Stevio 1.11 48:53:36 Stunden. (hh:mm:ss) Keine Lösung: BP21.0, BP 21.5.
FEN: rnbqk1n1/2pppppp/1R3R1B/8/6PQ/p2P4/PP1NPP1P/1B2K1NR
Input: Gerd Wilts, 2004-04-01
Last update: A.Buchanan, 2023-03-13 more...
20 - P1014577
Jewgeni F. Tischtschenko
Magadanski Komsomolez 03/06/1990
P1014577
(2+3)
a) S#2
b) #2
a) 1. Dc1+ Db1 2. Db2+ Dxb2#
b) 1. Dd4+ Db2+ 2. Dxb2#
1. ... Kb1 2. Dd1#
play all play one stop play next play all
1039
SCHRECKE: a)+b): C+, popeye 4.87 (2023-06-22)
comment
Keywords: Minimal (D), Twin, Cross check (in b), Aristocrat, Stipulation change, Corner mate (in b)
FEN: 8/1q6/2b5/2Q5/8/K7/8/k7
Input: Selbstmatt-Miniaturen/Reflexmatt-Miniaturen, 2004-05-01
Last update: Gunter Jordan, 2023-06-22 more...
21 - P1015431
Valery Surkov
230 Sach profil 1995
P1015431
(5+2) C+
s#4
b) 90 Grad drehen (a1 nach a8)
a) 1. Tb6+! Ka3 2. Ta6+ Kb3 3. d3 Lg7,L~ 4. Db2+ Lxb2#
b) 1. De4! Kc8,Lg2,Lf3 2. Tc2+ Kd7,Kd8 3. Td2+ Kc7,Kc8 4. Db7+ Lxb7#
play all play one stop play next play all
1590
SCHRECKE: a)+b): C+, Gustav 4.2a, Brute Force (2021-11-20)
comment
Keywords: Twinning by board rotation, Minimal, Miniature
Genre: s#
FEN: 7b/8/6R1/8/3Q4/1k6/3P4/KB6
Input: Selbstmatt-Miniaturen/Reflexmatt-Miniaturen, 2004-05-01
Last update: Marcin Banaszek, 2021-11-22 more...
22 - P1017476
Joachim Iglesias
R146 Problemesis 06/2004
G. Wilts und E. Pichouron gewidmet
P1017476
(15+15) C+
BP in 24,0
1. a4 Sc6 2. Ta3 Se5 3. Tf3 Sg6 4. Tf6 gxf6 5. Sf3 Lh6 6. Sh4 Le3 7. f4 Lc5 8. e3 Sh6 9. La6 b5 10. Tf1 Lb7 11. Tf3 Db8 12. Tg3 Lf3 13. Tg5 Db6 14. Td5 De6 15. Td6 Sf5 16. Tb6 h6 17. Tb7 0-0-0 18. Txa7+ Kb8 19. Tb7+ Ka8 20. Tb6 Tdg8 21. Td6 Sf8 22. Td3 Tg3 23. Ta3 Lg4 24. Ta1 Tf3
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wTa1 wird auf f6 geschlagen; wTh1 wechselt nach langem Ausflug nach a1.
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 44 Sekunden.
Keine Lösung: BP 23.0, BP 23.5.
Notation für Player bitte berichtigen: 24. Ta1 Tf3 (2023-05-01)
comment
Keywords: Unique Proof Game, Castling, Check Protection, Impostor (T)
Genre: Retro
Computer test: Stelvio 1.11
FEN: k4n1r/2pppp2/B3qp1p/1pb2n2/P4PbN/4Pr2/1PPP2PP/RNBQK3
Input: Gerd Wilts, 2004-06-05
Last update: Silvio Baier, 2023-08-15 more...
23 - P1066732
Eric Pichouron
PCCC Meeting 09/2004
3. ehrende Erwähnung Champagne TT 2004
P1066732
(12+14) C+
BP in 24,5
1. e4 h5 2. Dg4 hxg4 3. Sc3 Th3 4. Sd5 Tc3 5. bxc3 Sc6 6. La3 Sd4 7. Ld6 cxd6 8. h4 Da5 9. h5 b6 10. h6 Lb7 11. h7 0-0-0 12. Th6 La8 13. Tf6 gxf6 14. Lc4 Lh6 15. d3 Lc1 16. Se2 La3 17. Kd2 Lb4 18. Th1 Da3 19. Th5 a5 20. Te5 fxe5 21. h8=D Sf6 22. Dh1 Th8 23. Dd1 Th3 24. Ke1 Tf3 25. gxf3
play all play one stop play next play all
Richter MC: "A well oiled game using the 'standard Rook' to double the theme, displaying an additional Pronkin and switchback by Ke1."
Henrik Juel: Natch 3.1 did little in half an hour (2018-12-19)
Moldenhauer: Computerprüfung: C+ Stelvio 1.2 02:04:15 Stunden. (hh:mm:ss)
Keine Lösung: BP 23.5, BP 24.0. (2023-05-11)
comment
Keywords: Unique Proof Game, Pronkin Theme (D), Switchback, Impostor (Tt)
Genre: Retro
Computer test: Stelvio 1.2
FEN: b1k5/3ppp2/1p1p1n2/p2Np3/1bBnP1p1/q1PP1P2/P1P1NP2/3QK3
Reprints: H58 Phénix 02-03/2005
Input: Gerd Wilts, 2004-09-14
Last update: Silvio Baier, 2023-08-15 more...
24 - P1066789
Göran Wicklund
R259 Probleemblad 5 09-10/2004
5. Preis
P1066789
(16+11) C+
BP in 29,5
1. h4 Sc6 2. h5 Sd4 3. h6 Sb5 4. hxg7 h5 5. Th3 h4 6. Tg3 h3 7. a4 h2 8. a5 h1=D 9. a6 Dh2 10. axb7 a5 11. bxa8=T Lb7 12. Ta4 Lc6 13. Th4 a4 14. d4 a3 15. d5 a2 16. d6 a1=S 17. dxc7 Sb3 18. Ta1 Sa3 19. c8=T La4 20. Ta8 Db8 21. f4 Kd8 22. f5 Kc7 23. f6 Kb6 24. fxe7 Sf6 25. e8=T Ld6 26. Tc8 Te8 27. g8=T Te7 28. Tge8 Lc7 29. Tgg8 Dd6 30. Th1
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Zyklischer Platzwechsel sechs weißer Türme.
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comment
Keywords: Unique Proof Game, Non-standard material, Interchange (TTTTTT), Impostor (TT)
Genre: Retro
Computer test: Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:05:59 Minuten. (hh:mm:ss) keine Lösung: BP 28.5, BP 29.0.
FEN: RqR1R1R1/2bprp2/1k1q1n2/8/b7/nn6/1PP1P1P1/RNBQKBNR
Reprints: (18) StrateGems 10-12/2007
(80) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 2004-10-17
Last update: Silvio Baier, 2023-08-15 more...
25 - P1067438
Michel Caillaud
WCCC Halkidiki 2004
2. Preis Sake TT
P1067438
(20+12)
BP in 15,0
Crazyhouse
1. b4 a5 2. bxa5 Txa5 3. [+wBa7] Te5 4. a8=L d5 5. Lxb7 Kd7 6. [+wBa7] Ke6 7. a8=S Kf5 8. Sxc7 Le6 9. [+wBd7] Dc8 10. d8=T g6 11. Txd5 Lg7 12. [+wBd7] Lf6 13. d8=D Sd7 14. Dxe7 Sf8 15. [+wBb2] [+sBd7]
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James Malcom: I wonder if the newly placed wBb2 and sBd7 could be considered as imposters. (2021-06-27)
A.Buchanan: I think they are. This is not so hard a problem to solve. (2021-06-28)
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comment
Keywords: Allumwandlung, Crazyhouse, Unique Proof Game, Promotion (x4 LSTD), Non-standard material (DTLS), Impostor (Bb)
Genre: Retro, Fairies
FEN: 2q2nnr/1BNpQp1p/4bbp1/3Rrk2/8/8/PPPPPPPP/RNBQKBNR
Reprints: feenschach 154 2004
H46 Phénix 02-03/2005
Input: Gerd Wilts, 2005-01-09
Last update: A.Buchanan, 2021-06-28 more...
26 - P1068194
Gianni Donati
9926 Thema Danicum 121 01/2006
P1068194
(12+16) C+
BP in 24,0
1. d3 h5 2. Lf4 Sh6 3. Ld6 exd6 4. Sc3 Dg5 5. Db1 Dc1+ 6. Sd1 g5 7. a3 Lg7 8. Da2 Lxb2 9. Dc4 f6 10. Dg4 Kf7 11. Sf3 Te8 12. Sd2 Te3 13. Sb1 Th3 14. e3 Kg6 15. Le2 Sf7 16. Lf3 Sh8 17. Lc6 dxc6 18. 0-0 c5 19. Sdc3 Sc6 20. Dd1 Lg4 21. Kh1 Le2 22. f3 Lxf1 23. Se2 g4 24. Sg1 Kg5
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5zügiger Rundlauf der wD und Platzwechsel der wSS.
Reto: A lot faster with Stelvio 1.25, finished in about 1min. (2023-05-29)
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comment
Keywords: Unique Proof Game, Interchange (SS), Pure Round Trip (D5), Impostor (SS)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.11 01:03:51 Stunde. (hh:mm:ss) Keine Lösung: BP 23.0, BP 23.5.
FEN: r6n/ppp5/2np1p2/2p3kp/6p1/P2PPP1r/1bP3PP/RNqQ1bNK
Input: Gerd Wilts, 2005-12-21
Last update: A.Buchanan, 2023-04-27 more...
27 - P1072567
Juri Trepalin
Redkiye zhanry-plus 2007
3. Lob
P1072567
(4+3)
s#2
b) wKe1->e2, h#2
a) 1. 0-0 h3 2. Lh1 h2#
b) 1. h3 Sf4 2. hxg2 Sh5#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 also (2023-03-13)
comment
Keywords: Miniature, Twin, Stipulation change, Castling (in a)
Genre: h#, s#
Computer test: (Popeye WINDOWS-32Bit V4.05 (1575896 KB))
FEN: 8/8/6N1/8/6pp/6k1/6B1/4K2R
Input: hpr, 2007-04-29
Last update: Gunter Jordan, 2023-03-13 more...
28 - P1080540
Paul Raican
P0221 StrateGems 42 04-06/2008
1. Lob
P1080540
(16+14) C+
BP in 16,0
1. e3 a5 2. Dh5 Ta6 3. f3 Tc6 4. Kf2 Tc3 5. bxc3 c6 6. La3 Db6 7. Lxe7 c5 8. Sa3 Dg6 9. Tb1 f5 10. Tb6 Df7 11. Th6 b5 12. Lf6 b4 13. Lb5 Se7 14. Se2 Sg6 15. Ta1 De7 16. Ke1 Dd8
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paul: Quickly solved by Stelvio. (2023-03-12)
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comment
Keywords: Unique Proof Game, Impostor (T)
Genre: Retro
Computer test: Euclide 0.95, Stelvio v1.11
FEN: 1nbqkb1r/3p2pp/5BnR/pBp2p1Q/1p6/N1P1PP2/P1PPN1PP/R3K3
Input: Gerd Wilts, 2009-01-11
Last update: A.Buchanan, 2023-03-13 more...
29 - P1106507
Ken Kousaka
FIDE World Cup 2010
1. Lob
FIDE World Cup, Retros
P1106507
(15+16) C+
BP in exakt 18,5
1. c3 h5 2. Da4 h4 3. Dc6 dxc6 4. Kd1 Dd4 5. Kc2 Da4+ 6. Kd3 Lf5+ 7. Ke3 e6 8. Sf3 Lc5+ 9. Sd4 Se7 10. Kf4 Sg6+ 11. Kf3 Ke7 12. Sc2 Td8 13. Se1 Td4 14. Ke3 Sd7 15. Sf3 Th8 16. Sg1 Th5 17. f3 Sh8 18. Kf2 Lh7 19. Ke1
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Henrik Juel: The position can be reached in 18.0 moves: the first 3.0 as above, then Black plays as above, while White plays f3 and 14 tempo-moves like Sh3-g1.
Changing the stipulation to 'Proof game in exactly 18.5 moves' may rectify the situation.
The intended White play is very nice: Roundtrip by Ke1, needed by the triangulation on e3-f4-f3-e3, and roundtrip by Sg1, which screens on d4. (2011-03-14)
A.Buchanan: The preferred trick in such situations is to add an extra half move. So I'd try 19. ... Lg8: is that sound? (2017-09-14)
Henrik Juel: I tried to test 19... Lg8, but Euclide was too slow (2017-09-14)
Mario Richter: rawbats say that appending 19. ... Lg8 allows many alternative solutions, e.g. 1. c3 h5 2. Da4 h4 3. Dc6 dxc6 4. f3 Lf5 5. Sa3 Lh7 6. Tb1 Dd4 7. Ta1 Da4 8. Tb1 e6 9. Ta1 Se7 10. Kf2 Sg6 11. Ke3 Lc5+ 12. Kd3 Ke7 13. Sc4 Td8+ 14. Ke4 Td4+ 15. Ke3 Sd7 16. Sa3 Th8 17. Sb1 Lg8 18. Kf2 Th5 19. Ke1 Sh8
rawbats also says that Henrik's suggestion of changing the stipulation to 'Proof game in exactly 18.5 moves' will make the problem correct. (2017-09-18)
Mario Richter: I forgot: ... but since "loss of tempo" is the theme of the problem, this change of stipulation is IMHO not an option here. (2017-09-18)
A.Buchanan: Thanks Mario, and I agree with you about the aesthetics of change. After posting my Lg8 suggestion, I did regret it because it's doubly suspicious. Firstly, the bishop can sneak past bRh8; secondly it takes the bishop's eye off d3 & c2. A more serious guess is to replace the last black moves by 16... Rh6 17... Sf8 18... Rf6 19... g6. This might fail for what in my head I call the "jigsaw" reason: that the known sub-chains of moves no longer mesh together in a unique way, but I don't think it fails for any other reason. Prove me wrong, stout rawbats! :D (2017-09-18)
A.Buchanan: Sorry Henrik I should also have said thank you for trying to validate my dumb earlier suggestion :-) (2017-09-18)
A.Buchanan: Typo, I meant: 16... Rh6 17... *Sh8* 18... Rf6 19... g6 sorry :( (2017-09-18)
Mario Richter: with the last black moves changed to 16... Rh6 17... Sh8 18... Rf6 19... g6 (final pos: 7n/pppnkp2/2p1prp1/2b2b2/q2r3p/2P2P2/PP1PP1PP/RNB1KBNR) rawbats thinks the problem is correct (2017-09-18)
A.Buchanan: Thank you, Mario. Obviously the composer could easily have fixed this if he was aware of the concern. His KS round trips are fantastically meandering, and the precise W&B play are very interdependent. I am amazed that there is only one composition in PDB by this top level composer, so I've found another to post quickly. He has a website http://open.mixi.jp/user/10857363/diary, with lots of erudite commentary in Japanese on top Western retros. Thank you, google translate! (2017-09-18)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 in einer Sekunde.
Euclide 1.11 bleibt auch nach 487 Std. bei 1 stehen.
BP in 18.0 cooked. (2023-02-09)
Henrik Juel: with position 7n/pppnkp2/2p1prp1/2b2b2/q2r3p/2P2P2/PP1PP1PP/RNB1KBNR and stipulation PG 19.0
you have a problem that is C++ Stelvio 1.0 (2023-02-09)
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comment
Keywords: Unique Proof Game, Tempo Loss (w), Impostor (t)
Genre: Retro
Computer test: Stelvio 1.0
FEN: 7n/pppnkppb/2p1p3/2b4r/q2r3p/2P2P2/PP1PP1PP/RNB1KBNR
Input: Gerd Wilts, 2010-06-01
Last update: Silvio Baier, 2023-03-02 more...
30 - P1108924
Werner Keym
Die Welt 1999
P1108924
(9+6)
Add wB, wS, wL, wT, or wD on f7
Mate in #n moves
b) +wBf7 #1 1. f8=D#,l#

c) +wSf7 #1, White moved last 1. ... Lxf7 2. Sxf7#

d) +wLf7 #2 1. Lxc4 ... 2. Le3#

e) +wTf7 #3 1. Tf4 Txd4 2. Txd4 Lxf7 3. Sxf7#
1. ... Txb4 2. Le3 Txf4+ 3. Lxf4#

f) +wDf7 #4, White moved last 1. ... Txd4+ 2. Kg3 Lxf7 3. Sxf7+ Kh5 4. Th1+ Th4 5. Txh4#
2. ... Td3+ 3. cxd3 Lxf7 4. Sxf7+ Kh5 5. Th1#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61, except for dual in e) 1... Txc5 2.Lxc5,bxc5 and several duals in f) (2022-02-25)
comment
Keywords: No legal last move for Black, Twin (Forsberg)
Genre: Retro
FEN: 3N2br/7p/5P1k/2P2P2/1PrB3K/2p5/2P5/5R2
Input: Gerd Wilts, 2010-06-26
Last update: James Malcom, 2022-02-25 more...
31 - P1126397
Wilhelm Hagemann
Die Rätsel-Post 07/1949
P1126397
(5+2)
#3
b) sBb7->e6
a) 1. Lc3! Kc8 2. La5 Kd8 3. Kxb7#
b) 1. Sb8! Kc8 2. d7+ Kd8 3. Sc6#
play all play one stop play next play all
A18a1L
SCHRECKE: a)+b): C+, popeye 4.87 (2021-07-04)
comment
Keywords: Miniature Collection (0335426), Twin, Minimal, Miniature
Genre: 3#
FEN: 3k4/1p1N4/1K1P1N2/4B3/8/8/8/8
Reprints: 3904 Schach-Echo 7, p. 112, 04/1965
Input: Zuncke/Bruder, 2010-09-11
Last update: Dieter Berlin, 2021-07-03 more...
32 - P1202228
Hartmut Brozus
12333 Die Schwalbe 08/2004
Lob
P1202228
(6+2) C+
s#7*
b) alles 1 rechts: s#11*
c) alles 2 rechts: s#12*
d) alles 3 rechts: s#7*
a) 1. ... Txd1#
1. Sb7 Kc4 2. Sa5+ Kd3 3. Sc6 Kc4 4. Tb4+ Kd3 5. Td4+ Kc3 6. Tc1+ Tc2 7. Ka1 Txc1#
b) 1. ... Txe1#
1. Df4+ Kd3 2. Df3+ Te3 3. Df5+ Te4 4. Sg5 Kd4 5. Sf3+ Kd3 6. Sh4 Kd4 7. Td1+ Ke3 8. Td3+ Kxd3 9. Sg2 Kd4 10. Dc5+ Kd3 11. Se1+ Txe1#
c) 1. ... Txf1#
1. Dg4+ Ke3 2. Te1+ Te2 3. Sd5+ Kf2 4. Dg1+ Kf3 5. Tf1+ Ke4 6. Dg6+ Ke5 7. Tf5+ Ke4 8. Th5+ Kf3 9. Th3+ Kf2 10. Dg3+ Kf1 11. Se3+ Txe3 12. De1+ Txe1# = s#15* (??) von Raican (Revista de Sah 1984)
d) 1. ... Txg1#
1. Dh4+ Kf3 2. De4+ Kg3 3. Df4+ Kh3 4. Th1+ Th2 5. Df5+ Kg3 6. Tg1+ Tg2 7. Dh5 Txg1#
play all play one stop play next play all

Duplicate Diagram: P1260117

Anton Baumann: a)-d) C+ Gustav 4.2a (2022-12-05)
comment
Keywords: Tempoverlustrückkehr (d), Twin by board shift, Minimal
Genre: s#
FEN: 8/8/3N4/4Q3/8/3k4/PR1r4/1K1R4
Input: Frank Müller, 2011-09-11
Last update: Marcin Banaszek, 2022-12-08 more...
33 - P1229311
Hieronymus Fischer
Deutsches Wochenschach 09/03/1919
P1229311
(6+2) C+
s#4
b) 180 Grad gedreht
a) 1. Td7+! Kxc8 2. Tc7+ Kxc7 3. Dc6+ Kxd8 4. Dc7+ Kxc7#
b) 1. Te2+! Kxf1 2. Tf2+ Kxf2 3. Df3+ Kxe1 4. Df2+ Kxf2#
play all play one stop play next play all
Eigentlich als Faschingsscherz mit der Forderung Zwei Lösungen veröffentlicht.
SCHRECKE: a)+b): C+, Gustav 4.2a, Brute Force (2022-01-25)
comment
Keywords: Twinning by board rotation, Minimal
Genre: s#
FEN: K1BNr3/P1k5/5Q2/3R4/8/8/8/8
Input: Frank Müller, 2012-01-02
Last update: Marcin Banaszek, 2022-01-27 more...
34 - P1252658
Horst Böttger
781 Gaudium (123) 15/09/2012
P1252658
(4+3)
h#3
b) sSb3->e4
a) 1. Sa5 Lc4 2. Kxb4 Lb3+ 3. Kb5 La4#
b) 1. Te5 Tc4+ 2. Kd3 Tc3+ 3. Kd4 Td3#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 also (2023-03-04)
comment
Keywords: Miniature, Twin
Genre: h#
Computer test: %Popeye FreeBSD-9.0-RELEASE-i386-32Bit v4.59
FEN: 8/K7/B7/2r5/1P1R4/1nk5/8/8
Input: Erich Bartel, 2012-10-30
Last update: Gunter Jordan, 2023-03-04 more...
35 - P1252797
Michel Caillaud
Klaus Wenda

G14/33 feenschach 138, p. 411, 10-12/2000
P1252797
(3+2) C+
h#2
Anticirce
b) vertikal gespiegelt
a) 1. Ke8 b8=S 2. Te7 g8=D#
b) 1. Ke8 b8=S 2. Te7 g8=D#
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Henrik Juel: not 1.Kd8 g8=S 2.Td7 b8=D+ 3.Td1! (2023-07-30)
comment
Keywords: Promotion, Circe (Anti), Twinning by board reflection, under-promotion (S)
Genre: Fairies
Computer test: %Popeye FreeBSD-4.0-RELEASE-32Bit-Version 3.65promo
FEN: 8/1P2krP1/K7/8/8/8/8/8
Reprints: M23 ASymmetrie 2013
Input: Erich Bartel, 2012-11-01
Last update: Alfred Pfeiffer, 2017-11-21 more...
36 - P1270473
Saturnin Limbach
4138 Magyar Sakkelet 12/1977
Lob
P1270473
(9+2) C+
s#10
b) wBe7->d7
a) 1. e8=T Ka3 2. Db2+ Ka4 3. Tee4 Ka5 4. Db6+ Ka4 5. Tg1 Ka3 6. Db2+ Ka4 7. Tb1 Ka5 8. Db6+ Ka4 9. Db5+ Ka3 10. Sc2+ Sxc2#
b) 1. d8=D Ka3 2. Db2+ Ka4 3. Dh4 Ka5 4. Db6+ Ka4 5. Tg1 Ka3 6. Db2+ Ka4 7. Tb1 Ka5 8. Db6+ Ka4 9. Db5+ Ka3 10. Sc2+ Sxc2#
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SCHRECKE: a)+b): C+, Gustav 4.1d, Brute Force (2020-10-19)
comment
Keywords: Exchange of Promotions, Twin, under-promotion key (in a), Promotion key (in b), Minimal (s), Selfblock
Genre: s#
FEN: 8/4P3/1QP5/2P2P1P/k2n2R1/4N3/8/K7
Reprints: 1896 Szachy 05/1980
Input: Frank Müller, 2013-05-20
Last update: Gunter Jordan, 2022-07-25 more...
37 - P1277105
Janos Csak
13943 Schach 12/1997
P1277105
(11+2) C+
s#4
b) 90 Grad gedreht
c) 180 Grad gedreht
d) 270 Grad gedreht
a) 1. g8=D! Kd4 2. Dd5+ Kc3 3. Da3+ Tb3 4. Ka5 Txa3#
b) 1. g8=S! Kd5 2. Sf6+ Kc6 3. Dc8+ Tc7 4. Ke8 Txc8#
c) 1. e7! Ke5 2. e8=T+ Kf6 3. Dh6+ Tg6 4. Kh4 Txh6#
d) 1. e8=L! Ke4 2. Lg6+ Kf3 3. Df1+ Tf2 4. Kd1 Txf1#
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SCHRECKE: a)-d): C+, Gustav 4.2a, Brute Force (2022-01-01)
comment
Keywords: Allumwandlung, Twinning by board rotation, Minimal
Genre: s#
FEN: 8/1P4P1/1R1P4/1P6/K1B3P1/2kP4/1r2R3/Q7
Input: Frank Müller, 2013-09-01
Last update: Marcin Banaszek, 2022-01-06 more...
38 - P1295956
Michel Caillaud
6965 Phénix 241, p. 9623, 07-08/2014
P1295956
(16+16) C+
BP in 16,5
1. Sc3 e5 2. Sd5 Lc5 3. Se7 d5 4. e3 Lh3 5. Dg4 a5 6. De6 f5 7. Se2 Sf6 8. Sc3 Tf8 9. Dg8 Ta6 10. Dh8 La7 11. Sg8 Tf7 12. Sb1 Td7 13. Sh6+ Ke7 14. Sf7 Df8 15. Sg5 Se8 16. Sf3 Tf6 17. Sg1
play all play one stop play next play all
Henrik Juel: Thanks for the solution, Hans; I could not find it
The white knights switch places, very nice proof game (2015-01-26)
Henrik Juel: Natch 3.1 did little in half an hour
Stopped at pos. 1 (2018-12-31)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 05:48:08 Stunden. (hh:mm:ss)
Keine Lösung: BP 15.5, BP 16.0. (2023-03-05)
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comment
Keywords: Unique Proof Game, Interchange (SS), Impostor (SS), Capture-free
Genre: Retro
Computer test: Stelvio 1.0
FEN: 1n2nq1Q/bpprk1pp/5r2/p2ppp2/8/4P2b/PPPP1PPP/RNB1KBNR
Input: A.Buchanan, 2015-01-25
Last update: Silvio Baier, 2023-03-20 more...
39 - P1304834
Harald Grubert
12 The Desert Knight 1987-1988
P1304834
(5+3) C+
h#4
b) wBg2->g5
a) 1. d4+ Ke2 2. Kd5 f4 3. Ke4 g3 4. d5 d3#
b) 1. Kc5 f4 2. Kd6 f5 3. Ke5 d3 4. d6 d4#
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klären Datum
Gunter Jordan: In seiner Broschüre "Hilfsmattvierer" gibt der Autor selbst 1987 als Veröffentlichungsjahr an - leider nicht genauer. (2021-12-22)
comment
Keywords: Kindergarten Problem, Chameleon Echo, Ideal mate, Pawn step variations, Selfblock, Pawn mate, Checking key (in a), Twin
Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
FEN: 8/3p4/8/3p4/2k3P1/4KP2/3P2P1/8
Reprints: 4 Hilfsmattvierer , p. 4, 2000
Input: hpr, 2015-06-26
Last update: Gunter Jordan, 2021-12-22 more...
40 - P1317443
Sergey Radchenko
10322 Ideal-Mate Review 76 10-12/1999
Preis
PR Eugene Albert
P1317443
(4+3)
ser-h#5
b) wLf4
a) 1. Kxf1 2. Kxe2 3. Ke1 4. h1=T 5. Tf1 Te4#
b) 1. h1=L 2. Lhg2 3. Lxf1 4. Lxe2 5. f1=L Lg3#
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Anton Baumann: C+ Gustav 4.1d (2021-05-15)
comment
Keywords: Forsberg Twins, Ideal mate, Miniature, Phoenix (in b), Round Trip (in a), Selfblock, Seriesmover, Promotion key (in b), Exchange of Promotions, under-promotion, Twin
Genre: Fairies
FEN: 8/8/8/8/5R2/8/4Pp1p/2K1kB2
Input: Gunter Jordan, 2016-02-19
Last update: Rainer Staudte, 2023-01-19 more...
41 - P1317504
György Bakcsi
Laszlo Zoltan

10321 Ideal-Mate Review 76 10-12/1999
P1317504
(4+3)
ser-h#5
b) Drehung 180°
a) 1. h3 2. h2 3. h1=T 4. Th3 5. Tc3 S1d2#
b) 1. a4 2. a3 3. a2 4. a1=L 5. Lg7 Sfe7#
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Anton Baumann: a) + b) C+ Gustav 4.1d (2021-09-18)
comment
Keywords: Exchange of roles (SS), Ideal mate, Miniature, Selfblock, Seriesmover, under-promotion, Twin, Twinning by board rotation
Genre: Fairies
FEN: 8/8/8/K7/2N4p/1k6/n7/1N2N3
Input: Gunter Jordan, 2016-02-20
Last update: Alfred Pfeiffer, 2016-02-21 more...
42 - P1319410
Karol Mlynka
1263 Gaudium 156 10/2015
P1319410
(4+7)
hs#3
b) sKLh2->h7
wKU=Transmutierender König
sKL=Preßburger König
a) 1. Txa3 PKh1 2. Ta2 Dxa2 3. Lxg2+ PKxg2=L#
b) 1. T5a6 PKh8 2. Txg7 Dh7 3. Tg8+ PKxg8=T#
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SCHRECKE: a)+b): C+, popeye 4.89 (2023-11-06)
comment
Keywords: pin-mate, Exchange of roles (Ta7-Lc6), Twin
Pieces: ku = Transmuting king (TK), kl = Pressburger King (PK)
Genre: Fairies
FEN: *2K7/R5p1/2B4p/R3p3/8/p7/6b*3k/1q6
Input: Gunter Jordan, 2016-04-24
Last update: Alfred Pfeiffer, 2017-01-16 more...
43 - P1321334
György Bakcsi
Laszlo Zoltan

10589 Ideal-Mate Review 77 01-03/2000
Lob
PR Eugene Albert
P1321334
(4+3)
h#3
b) wKe8->c8
a) 1. c5 Le7 2. Ke5 Lh4 3. Kd6 Lxg3#
b) 1. Le5 Lxc7 2. Kc5 La5 3. Kd6 Lb4#
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Anton Baumann: C+ Gustav 4.1d (2021-05-31)
comment
Keywords: Echo, Exchange of roles (s), Ideal mate, Miniature, Selfblock, Twin
Genre: h#
FEN: 4K3/2p5/3B4/3P4/3kP3/6b1/8/8
Input: Gunter Jordan, 2016-06-16
Last update: Gunter Jordan, 2016-06-16 more...
44 - P1334345
Anatoli G. Jepifanow
11873 Ideal-Mate Review 83 07-09/2001
Ehrende Erwähnung
PR: Eugene Albert
P1334345
(3+3)
h#3
Vertikalzylinder
b) sKc6->f6
a) 1. Lc5 Sg6 2. Kd5 Kd3 3. Lc6 Sf4#
b) 1. Lf5 Sb6 2. Ke5 Ke3 3. Lf6 Sc4#
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paul: Jacobi+ (2021-10-17)
comment
Keywords: Aristocrat, Ideal mate, Miniature, Twin, Switchback, Selfblock
Genre: Fairies
FEN: b6b/8/2k5/8/2N2N2/8/4K3/8
Input: Gunter Jordan, 2017-05-23
Last update: Alfred Pfeiffer, 2017-06-23 more...
45 - P1335617
Yaakov Mintz
7832 Phénix 273/274, p. 10779, 05-06/2017
P1335617
(14+9) C+
BP in 8,5
1. f4 e5 2. fxe5 Ld6 3. exd6 Se7 4. dxc7 Sec6 5. cxb8=D Dc7 6. Dxa8 Sb8 7. Dxb7 Dxc2 8. Db3 Dxd1+ 9. Dxd1
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YM: 1° Recommandé (2021-10-20)
comment
Keywords: Homebase (2), Pronkin Theme (D), Unique Proof Game, Impostor (s), Prenix (D)
Genre: Retro
FEN: 1nb1k2r/p2p1ppp/8/8/8/8/PP1PP1PP/RNBQKBNR
Input: YM, 2017-07-03
Last update: A.Buchanan, 2019-01-26 more...
46 - P1339612
Roberto Osorio
Jorge Joaquin Lois

R496 The Problemist 2015-2016
1. ehrende Erwähnung
The Problemist 2015-2016
P1339612
(11+14) C+
PG in 20.5
1. c4 d5 2. Db3 Lf5 3. Db6 axb6 4. Sh3 Ta3 5. Tg1 Tc3 6. a4 e6 7. a5 Ke7 8. a6 Kf6 9. a7 Le7 10. a8=D Df8 11. Da4 Txc1+ 12. Dd1 Tc3 13. Ta6 Tf3 14. gxf3 bxa6 15. Tg6+ hxg6 16. Sg1 Th3 17. Db3 Tg3 18. Lh3 Kg5 19. De3+ Kh4 20. Dh6+ gxh6 21. fxg3+
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Judge's comment [Silvio Baier]: "Two cross-captures with the same type of captured pieces (QR) are combined with a cross-capture of two black rooks. This is not the highest number of cross- captures in an orthodox proof game (see e.g. P1003984 for comparison), but the pairs are very harmonious and the additional white Q-Pronkin is difficult to implement, and especially the motivation of the promotion of Pa2 is very deep. The check in the diagram position does not detract, since g2-g3+ is also possible with respect to pure retroanalysis."
A.Buchanan: Great problem, but I disagree with the last sentence in Silvio's comment. The alternative at the end g2-g3+ would force an obtrusive bishop. If the composers could have figured out how to do this without the final check, they obviously would have. (2017-09-18)
Henrik Juel: I also like this proof game very much
It seems the kind of problem that is most readily solved by hand; the missing [Lc1] and the missing black rooks might prompt the suspicious solver to consider cross-captures
Euclide did find the solution, but after a long time, and he was not able to verify uniqueness within an hour (2017-09-18)
Moldenhauer: Computerprüfung: C+ Stelvio 1.4 00:01:28 Minute. (hh:mm:ss)
Wegen Retraktion, keine Überprüfung auf 20.0. (2023-07-17)
more ...
comment
Keywords: Unique Proof Game, Cross-capture (DT,DT,tt), Ceriani-Frolkin Theme (D), Impostor (ppppPP)
Genre: Retro
Computer test: Stelvio 1.4
FEN: 1n3qn1/2p1bp2/pp2p1pp/3p1b2/2P4k/5PPB/1P1PP2P/1N2K1N1
Reprints: The Problemist , p. 5, 03/2017
Input: A.Buchanan, 2017-09-18
Last update: Silvio Baier, 2023-08-15 more...
47 - P1340215
Roberto Osorio
Jorge Joaquin Lois

R470 The Problemist vol.24-8, p. 341, 03/2014
after Satoshi Hashimoto
Lob
The Problemist 2013-2014
P1340215
(15+9)
PG in 18.5
1. d3 g5 2. Lxg5 Lg7 3. Dd2 Lc3 4. Sxc3 c5 5. 0-0-0 Dc7 6. Sb1 Dg3 7. hxg3 h6 8. Txh6 b6 9. Te6 Th3 10. gxh3 Lb7 11. Lg2 Lf3 12. Sxf3 Sf6 13. Th1 Se4 14. Dd1 Sd2 15. Kxd2 fxe6 16. Ke1 Kf7 17. Lc1 Kf6 18. Sg1 Ke5 19. Lf1
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Judge's comment [Thomas Brand]: "This elegant proof game seems me original enough compared with Hashimoto's Probleemblad 1999, 3rd Prize, (PDB P1000642), even though the theme is not doubly set. The only missing white man is a Rook captured at e6, but Ra1 could not leave home."
Henrik Juel: The white plan is obvious, and Black ensures uniqueness by putting his men to be captured on squares, where White can go anyway, and by a late king's walk
This proof game is an enjoyable solving object showing that man can beat the computer; Euclide was still trying to find a strategy (a list of moves, possibly infeasible, that leads to the diagram position), when I had solved the problem and written the present lines...
You might call Pg3,h3 impostors also, as well as Th1 (2017-09-27)
Moldenhauer: Computerprüfung: C+ Natch 3.3 in 5 Std. 57 Min. nur obige Lösung
BP in 17.5 keine Lösung. (2022-09-05)
more ...
comment
Keywords: Unique Proof Game, Impostor (TPP), Switchback (SLDKLS), Cross-capture (gh)
Genre: Retro
FEN: rn6/p2pp3/1p2p3/2p1k3/8/3P2PP/PPP1PP2/1NBQKBNR
Reprints: R470 The Problemist vol.25-8, p. 347, 03/2016
Input: A.Buchanan, 2017-09-27
Last update: Alfred Pfeiffer, 2019-06-03 more...
48 - P1347831
Kenneth Solja
Harri Hurme

13846 Springaren 143 03/2017
5. Preis
P1347831
(8+11) C+
h#2
2.1...
b) wSd3->c5
a) 1) 1. Kxb3 Ld4 2. Dc4 Sc5 (A)#
2) 1. Dd5 Sdc5 (A) 2. Scd4 Sa5#
b) 1) 1. Td5 Sd3 2. Sc3 Sd2 (B)#
2) 1. Td5 Sd2+ (B) 2. Kd4 Scb3#
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Kenneth Solja: The problem got 5th Prize. PR Steve Dowd (2023-11-27)
comment
Keywords: discovered checkmate (in a1+b2), Batteriematt diagonal (in b2), Batteriematt horizontal (in a1), Selfblock, Twin
Genre: h#
FEN: 8/B3p3/2n1P3/1q6/Prk2P1K/pN1N2R1/p1p2b2/1n1r4
Input: Gunter Jordan, 2018-03-09
Last update: Dieter Berlin, 2023-11-27 more...
49 - P1374138
Kurt Keller
2020/13 Schach in Schleswig-Holstein 03/2020
P1374138
(5+1) C+
#4
b) Ke1->d1
a) 1. Tc5! Kd3 2. Sf8 Kd4,Ke3 3. Se6+,Se6 Kd3,Ke3 4. Tc3#
1. ... Ke3 2. Tc4 Kd3 3. Se5+ Ke3 4. Te4#

b) 1. Ta3! Kc4 2. Lc6 Kd4,Kb4 3. Kc2 Kc4 4. Ta4#
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Die Lösungen zur Aufgabe 2020/13 (Kurt Keller) lauten: a) 1. Tc5 Kd3 2. Sf8 Kbel. 3. Se6 (+) Kd3 4. Tc3# sowie b) 1. Ta3 Kc4 2. Lc6 Kb4/Kd4 3. Kc2 Kc4 4. Ta4#. „Als Zwillingsstück akzeptabel“ (Baldur Kozdon). „a) bietet zwei hübsche Varianten mit analogen Springer-Zügen und Rückkehr des weißen Turms im Mattzug. b) fällt demgegenüber ab“ (Stephen Rothwell). „attraktive, übersichtliche Miniatur mit guter Ausnutzung des wenigen Materials“ (Claus Grupen).
(Winus Müller (Rathjensdorf, Germany): Problemschach. Lösungen zur Ausgabe 03/2020, in: Schach in Schleswig-Holstein, 2020-05)
Comments:
  • Note on publication (German): Liebe Löser, die beiden direkten Mattaufgaben sind etwas schwieriger [...]. (Winus Müller (Rathjensdorf, Germany): Problemschach, in: Schach in Schleswig-Holstein, 2020-03)
  • Author – Kurt Keller (Ulm, Germany)
  • Yet Another Chess Problem Database (500597)

more ...
comment
Keywords: Rex solus (s), Miniature, Stalemate dissolution, Flight-giving key, Model mate, Switchback (T), Twin
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 8/1B1N4/8/8/3k4/2R5/1P6/4K3
Input: Kurt Keller, 2020-04-04
Last update: Kurt Keller, 2021-03-30 more...
50 - P1380855
James Malcom
MatPlus.net Forum 12/10/2020
P1380855
(14+14) C+
BP in 12.0
1. g3 d6 2. Lg2 Dd7 3. Ld5 Dh3 4. Le6 fxe6 5. a4 Kf7 6. a5 Kg6 7. a6 Kh5 8. axb7 g6 9. bxa8=L Lg7 10. Lg2 Lxb2 11. Sf3 Lg7 12. Lb2 Lb7
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James Malcom: The theme is that 5 bishops are fianchettoed-one more than normally allowed! (2020-10-13)
Rainer Staudte: Rules allow a 20-bishops-fianchetto. (2020-10-13)
Henrik Juel: Very nice, James
For this short PG any tester will suffice, but if you push this idea further, Natch is much faster than Jacobi (2020-10-13)
A.Buchanan: Can’t a fianchettoed bishop go round to the bank rank and do it again? So even 20 is not a barrier (2020-10-13)
A.Buchanan: Dates in PDB are yyyy-mm-dd or dd/mm/yyyy. Hence I will change publication date from Dec to Oct (2020-10-13)
James Malcom: Right-the date slipped me again!

Andrew, while a bishop can easily be fianchettoed twice+, about the number of bishops doing it, not how many times it is done. I'm sure that an expert could do 6 fianchettoing bishops. (2020-10-13)
A.Buchanan: I am joking James: this is cool already (2020-10-13)
comment
Keywords: Promotion (L), Phoenix, Impostor (L), Unique Proof Game
Genre: Retro
Computer test: Jacobi v0.7.5
FEN: 1n4nr/pbp1p1bp/3pp1p1/7k/8/5NPq/1BPPPPBP/RN1QK2R
Input: James Malcom, 2020-10-13
Last update: A.Buchanan, 2021-04-06 more...
51 - P1380896
Andrew Buchanan
MatPlus.net Forum 12/10/2020
P1380896
(13+13) C+
PG in 6.5
(-:
1. b4 g5 2. b5 g4 3. b6 g3 4. bxa7 gxh2 5. axb8=sS! hxg1=wT! 6. Txh7 Txh7 7. Th1
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The joke here is that pawns may promote to foreign units.
Henrik Juel: The testers probably do not work here, but this seems unique
1.b4 g5 .. 4.bxa7 gxh2 5.axb8=sS hxg1=wT 6.Txh7 Txh7 7.Th1 (2020-10-14)
A.Buchanan: According to Joost De Heer, WinChloe has a category “promotions adverses”, and under this, the problem is C+. Looking now for a full Homebase without utilising promotion to enemy pawn, which makes it too easy (2020-10-15)
comment
Keywords: Unique Proof Game, Joke, Joke promotion (sT), Homebase (w), Phoenix (s), Prenix (T), Impostor (sT)
Genre: Retro, Fairies
Computer test: C+ WinChloe
FEN: rnbqkbn1/1ppppp1r/8/8/8/8/P1PPPPP1/RNBQKB1R
Input: A.Buchanan, 2020-10-14
Last update: A.Buchanan, 2022-09-18 more...
52 - P1381390
Ivan Bryukhanov
798 Pat a Mat 113 09/2020
3. Preis
Abt. h#>3
PR Karol Mlynka
P1381390
(3+3) C+
h#5
0.1.1...
b) sKg5->g4
a) 1. ... Se7 2. Da5+ Kb7 3. Tf7 Kc6 4. Kf6 Kd6 5. Dg5 Se8#
b) 1. ... Se6 2. Dg3 Kb7 3. Tf6 Kc6 4. Kf5 Kd5 5. Dg4 Se7#
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more ...
comment
Keywords: Aristocrat, Echo, Remote selfblock, Exchange of roles (S-S), Ideal mate, Miniature, Selfblock, Twin
Genre: h#
FEN: K5N1/2q3N1/8/6k1/8/8/8/5r2
Reprints: 1091 Pat a Mat 115 03/2021
Input: Gunter Jordan, 2020-10-30
Last update: Marcin Banaszek, 2021-04-09 more...
53 - P1381408
Jozef Holubec
Gravure 2020
2. Lob
P1381408
(7+2) C+
s#8
b) +wBa2
a) 1. La2! Kd4 2. Dg1+ Ke4 3. Ke1 Kf5 4. Tf3+ Ke4 5. Ld2 Kxf3 6. Th4 e4 7. Kf1 e3 8. Le1 e2#

b) 1. Lf8! Kd4 2. Th4+ e4 3. Lb4 Kxc4 4. La5 Kd4 5. Kd1 Kc4 6. Ta4+ Kd3 7. Dc1 e3 8. Le1 e2#
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more ...
comment
Keywords: Twin, Pawn mate, Echo, Selfblock, Model mate
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/5N1R/7B/4p1Q1/2B1k3/R7/3K4/8
Input: Olaf Jenkner, 2020-10-31
Last update: Alfred Pfeiffer, 2020-11-03 more...
54 - P1382502
Hartmut Brozus
18186 Die Schwalbe 303, p. 565, 06/2020
P1382502
(6+1) C+
#6
b) La3->d6
a) 1. Ke3! Kd5 2. Sd6 Ke5 3. Se8 Kd5 4. Kd3 Ke5 5. Ld6+ Kd5 6. e4#

b) 1. a4! Kd5 2. a5 Kc4 3. a6 Kd5 4. a7 Kc4 5. a8=S Kd5 6. Sb6#
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18186 (H. Brozus). a) 1.Ke3! Kd5 2.Sd6 Ke5 3.Se8 Kd5 4.Kd3 Ke5 5.Ld6+ Kd5 6.e4#. Für den Teil a) hat Kurt Keller ein Vergleichsstück yacpdb.org / #366782 [366782=P1382503] von Waleri Ivanov mit der Quelle Sem shahmatnyh not von 2009 recherchiert: #5, wKc4 wLc8 wSe3d5 wBd2 sKe5, 1.Sf5! Ke4 2.Sh4 Ke5 3.Kc5 Ke4 4.Lf5+ Ke4 5.d4#. b) 1.a4! Kd5 2.a5 Kc4 3.a6 Kd5 4.a7 Kc4 5.a8S Kd5 6.Sb6#. „Immerhin konnte ich mal wieder einen halben Mehrzüger lösen. An Aufgabenteil a) habe ich mir die Zähne ausgebissen – der erhoffte Exzelsior-Marsch des e-Bauern war leider wenig erfolgreich.“ (JS [Jochen Schröder]) Den von Jochen Schröder erhofften Exzelsior zeigt der von Kurt Keller dankenswerterweise gefundene Vorgänger P1140062 von Lajos Riczu aus Magyar Sakkelet von 1978. #6, wKd3 wLe6 wSe4g5 wBa2 sKf4, b) wBa2?h2, a) 1.a4 Ke5 2.a5 Kf4 3.a6 Ke5 4.a7 Kf4 5.a8D Ke5 6.Db8#, b) 1.h4 Ke5 2.h5 Kf4 3.h6 Ke5 4.h7 Kf4 5.h8S Ke5 6.Sg6#. „Im Duo gefälliger leichter Rex-solus mit weißer Unterverwandlung in einer Variante. Schwarz hat dabei allerdings nicht viel zu sagen.“ (KHS [Karl-Heinz Siehndel])

(Ralf Krätschmer (Neckargemünd, Germany): Lösungen der Urdrucke aus Heft 303, Juni 2020. Mehrzüger Nr. 18185-18189, in: Die Schwalbe, Heft 306-1, Dezember 2020)
Part (a) anticipated through P1382503
Part (b) anticipated through part (b) of the twin P1140062
Further comments:
  • Author – Hartmut Brozus (Berlin, Germany)
  • Hartmut Brozus legt (18186) eine löserfreundliche Aufgabe vor, bei der es mich nicht wundern würde, wenn es einen Vorgänger geben sollte.
    (Ralf Krätschmer, FIDE Master (FM) of Chess Composition (Neckargemünd, Germany): Urdrucke. Mehrzüger (18185-18189), in: Die Schwalbe, June 2020)
  • YACPDB (524841)

more ...
comment
Keywords: Rex solus, Miniature, Twin, anticipated (a: P1382503), anticipated (b: b of P1140062), Pawn mate (a), Switchback (k), Excelsior
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 8/8/8/1N6/2kN4/B4K2/P3P3/8
Input: Kurt Keller, 2020-11-27
Last update: Kurt Keller, 2021-01-03 more...
55 - P1384459
Silvio Baier
Nicolas Dupont

Tehtäväniekka 2014
Spezielle ehrende Erwähnung
P1384459
(15+11) C+
BP in 26,5
1. f2-f4 h7-h5 2. f4-f5 h5-h4 3. f5-f6 h4-h3 4. f6xe7 h3xg2 5. h2-h4 g7-g5 6. h4-h5 g5-g4 7. Th1-h4 g4-g3 8. Sg1-h3 g2-g1=L 9. Lf1-g2 Lg1-b6 10. Lg2-h1 g3-g2 11. h5-h6 g2-g1=L 12. h6-h7 Lg1-c5 13. d2-d4 d7-d5 14. d4xc5 d5-d4 15. c5xb6 d4-d3 16. Th4-d4 f7-f5 17. e2-e4 d3-d2 18. Ke1-e2 f5-f4 19. Dd1-g1 d2-d1=T 20. Lc1-e3 Td1-d3 21. Sb1-d2 Td3-b3 22. a2xb3 f4-f3 23. Ke2-d3 f3-f2 24. Ta1-a4 f2-f1=T 25. Sh3-f2 Tf1-a1 26. Sd2-f1 Ta1-a3 27. b2xa3
play all play one stop play next play all
Henrik Juel: Promoted black LLTT are captured by white pawns
Cross-capture axb3 and bxa3
Very good (2020-12-31)
Henrik Juel: No solutions in 26.0 moves or shorter (2020-12-31)
more ...
comment
Keywords: Unique Proof Game, Ceriani-Frolkin Theme (lltt), Impostor (tt)
Genre: Retro
Computer test: C+ Euclide 1.01
FEN: rnbqkbnr/ppp1P2P/1P6/8/R2RP3/PP1KB3/2P2N2/5NQB
Input: fs/hg, 2020-12-30
Last update: Silvio Baier, 2022-04-21 more...
56 - P1384733
Silvio Baier
Nicolas Dupont

Phénix 2012-2013
1. Preis
P1384733
(12+14) C+
BP in 27
1. h4 a5 2. h5 a4 3. h6 Ta5 4. hxg7 h5 5. f4 h4 6. f5 h3 7. f6 Th4 8. fxe7 f5 9. b4 Sf6 10. g8=L Lh6 11. Lb3 axb3 12. g4 b2 13. g5 Tg4 14. g6 Lg5 15. g7 Kf7 16. g8=L+ Kg6 17. Lc4 d5 18. e8=T dxc4 19. Te6 Dd3 20. Ta6 bxa6 21. e4 Lb7 22. e5 Le4 23. e6 Te5 24. e7 c5 25. e8=T Sc6 26. Td8 Se8 27. Td4 cxd4
play all play one stop play next play all
paul: Tested by Stelvio in ~2h (2023-02-02)
comment
Keywords: Ceriani-Frolkin Theme (TTLL), Future Proof Game, Impostor (TTLL)
Genre: Retro
FEN: 4n3/8/p1n3k1/4rpb1/1Pppb1r1/3q3p/PpPP4/RNBQKBNR
Input: fs/hg, 2020-12-30
Last update: Silvio Baier, 2022-03-31 more...
57 - P1384873
Kurt Keller
C17 Shakhmatnaya Kompozitsiya 154, p. 3, 12/2020
Merry Christmas & Happy New Year! Счастливого Рождества и веселого Нового года!
P1384873
(8+2) C+
#4
b) -Be4
a) 1. Lc5! Kf4 2. Kg2 Kg5 3. Sh3+ Kh4 4. Lf2#
3. ... Kh6 4. Lf8#

1. La3? Kf4 2. Ld6+ Kf3 3. g5 fxg5 4. Lg4#
2. ... Kg5!

b) 1. Se4! Kf4 2. Ld6+ Kf3 3. g5 fxg5 4. Sxg5#

1. Ke1? droht 2. Ld6 droht 3. Le4#
2. ... Kg2 3. Le4+ Kg1 4. Sh3#
1. ... Kf4!

1. La3? droht 2. Lc1 droht 3. Le4+ Kf4 4. d4#
2. ... Kf4 3. d4+ Kf3 4. Le4#
1. ... Kf4 2. Ld6+ Kf3 3. Le4#
2. ... Kg5!
play all play one stop play next play all
С17. К.Келлер. a) 1.c5! f4 2.g2 g5 3.h3+ h4 4.f2#, 3...h6 4.f8#, b) -♙e4, 1.e4! f4 2.d6+ f3 3.g5 fg5 4.:g5#.
(РЕШЕНИЯ «ШК» № 154 – 2020 [SK 154])
Comments:
  • Author - Kurt Keller (Ulm, Germany)
  • Yet Another Chess Problem Database (...)

more ...
comment
Keywords: Symbol problem (Christmas tree), Symmetrical position, Asymmetrical solution, Model mate, Switchback (k), Sacrifice of white pieces, Active sacrifice, Deflection, Steering, Minimal, Twin
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 5B2/8/5p2/5B2/4P1P1/5k2/3P1N1P/5K2
Input: Kurt Keller, 2021-01-02
Last update: Kurt Keller, 2021-03-30 more...
58 - P1385832
Kurt Keller
4585 idee & form 149, p. 5047, 01/2021
Weihnachts- und Neujahrsgruss
P1385832
(10+2)
#5
b) -wBd4
c) ferner -wBb5
a) 1. d6? cxd6 2. b6 d5 3. Lb7 Kb5 4. Kc7 Kc4 5. La6#
4. ... Ka4! 5. Lc6+ Ka3

1. b6! cxb6 2. Kc7 b5 3. Ld7 Kxd5 4. Lf5 Kc4 5. Le6#

b) 1. b6? cxb6!
1. d6! cxd6 2. b6 d5 3. b7 d4 4. b8=D droht 5. Db5#
5. ... dxc3 5. Df4#

c) 1. b5? Kc5!
1. d6! cxd6 2. Kb7 d5 3. La4 d4 4. Lb3+ Kb5 5. a4#
play all play one stop play next play all
Nr. 4585, K. Keller [Ulm, Germany]: a) 1.d6? c:d6! 1.b6! c:b6 2.Kc7 b5 3.Ld7 K:d5 4.Lf5 Kc4 5.Le6⧧ b) 1.b6? c:b6! 1.d6! c:d6 2.b6 d5 3.b7 d4 4.b8D (5.Db5⧧) d:c3 5.Df4⧧ c) 1.b5? Kc5! 1.d6! c:d6 2.Kb7 d5 3.La4 d4 4.Lb3+ Kb5 5.a4⧧
(Andreas Nievergelt (Winterthur, Switzerland): informalturnier. Lösungen zu Heft i&f 149, in: idee & form 150, p. 5084, April 2021)
Comments:
  • Author – Kurt Keller (Ulm, Germany)
  • Yet Another Chess Problem Database (...)

more ...
comment
Keywords: Symbol problem (Christmas tree), Stalemate dissolution, Sacrifice key, Sacrifice of white pieces, Active sacrifice, Switchback (k), Option key, Promotion, Pawn mate (c), Symmetrical position, Asymmetrical solution, Twin (triplet), Minimal
Genre: n#
Computer test: Popeye Windows-32Bit v4.63 (512 MB)
FEN: 2K5/2p5/2B5/1P1P4/1PkP4/2P5/P3P3/2R5
Input: Kurt Keller, 2021-01-27
Last update: Kurt Keller, 2021-04-28 more...
59 - P1385885
Gennady Chumakov
18277 Die Schwalbe 304 08/2020
Lob
Abt. h#3,5-n
PR Fadil Abdurahmanovic
P1385885
(4+3)
h#3.5
b) wSh1->h2
a) 1. ... Sg3 2. Dh2 Sf5 3. Kc8 Lb6 4. Db8 Sd6#
b) 1. ... Sf3 2. Dg2 Sd4 3. Ka7 Lc8 4. Da8 Sc6#
play all play one stop play next play all
SCHRECKE: a)+b): C+, popeye 4.89 (2023-10-15)
comment
Keywords: Aristocrat, Miniature, Twin, Model mate
Genre: h#
FEN: 1k6/8/8/8/2r3B1/7q/5B2/K6N
Input: Gerd Wilts, 2021-01-27
Last update: Olaf Jenkner, 2023-10-15 more...
60 - P1386321
Eduard Zarubin
8923 Seven Chess Notes 177 10/2020
P1386321
(2+4) C+
h#6
b) sDh4->f8
a) 1. Dc4 Kd8 2. Kb6 Ke7 3. Dc8 Lg1+ 4. Kc7 Kf7 5. Kd8 Lc5 6. Sc7 Le7#
b) 1. Kb6 Lc7+ 2. Ka7 La5 3. Sd6+ Kc7 4. Sb7 Kc6 5. Da8 Kb5 6. Sb8 Lb6#
play all play one stop play next play all
SCHRECKE: a)+b): C+, Gustav 4.1d, Brute Force (2021-02-08)
comment
Keywords: Discovered check (in b), Aristocrat, Echo, Remote selfblock (in a), Ideal mate, Miniature, Minimal (L), Selfblock, Twin
Genre: h#
FEN: 2K1n3/3n4/8/2k5/7q/8/7B/8
Input: Gunter Jordan, 2021-02-08
Last update: Rainer Staudte, 2021-03-31 more...
61 - P1386617
Nikolai A. Koblow
7940 Seven Chess Notes 2019
1.-2. Preis
P1386617
(6+1) C+
#3
b)wBc3->g6
a) 1. Th7! Kxf6 2. De3 Kg6 3. Dh6#
1. ... Kd6 2. De1 Kc5 3. De5#
1. ... Kxe6 2. Dg5 Kd6 3. Dd5#
b) 1. Sg8! droht 2. Dc4 Kd6 3. Dd5#
1. ... Kd6 2. Th5 ... 3. Dc6#
1. ... Kxe6 2. Dc5 Kd7 3. De7#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 (2021-02-18)
comment
Keywords: Miniature, Twin, Rex solus (s), Changed continuation
Genre: 3#
FEN: 8/1K6/4BN2/4k3/8/2P4R/8/2Q5
Input: Rainer Staudte, 2021-02-18
Last update: James Malcom, 2021-02-18 more...
62 - P1386621
Andrew Buchanan
1 Problemas , p. 1050, 01/2021
motto: "Fake Gnus!"
P1386621
(12+15) C+
PG in 8.5
Gnus instead of knights
sSR=Gnu
wSR=Gnu
1. f4 GNc5 2. f5 GNxd2 3. f6 GNxg1 4. Dxd7+ GNxd7 5. Kd1 GNxe2 6. Tg1 GNf5 7. La6 GNfg8 8. c4 GNb8+ 9. Kc2
play all play one stop play next play all
Henrik Juel: Solution
1.f4 GNc5 2.f5 GNxd2 3.f6 GNxg1 4.Qxd7+ GNxd7 5.Kd1 GNxe2 6.Tg1 GNf5 7.La6 GNfg8 8.c4 GNb8+ 9.Kc2
As intimated by the motto, the black Gnus have switched places
TRD's classical fairy men, Grasshopper and Nightrider, are traditionally depicted by rotating a queen and a knight 180 degrees; so I would prefer the Gnus here represented by a 90 degrees rotation (either way) (2021-02-19)
A.Buchanan: Hi Henrik thanks for the "orientation on orientation" :) I have pivoted the knights. The 100 gnu problems in PDB are 30 L, 20 U & 50 R, so I've gone for the last (2021-02-19)
comment
Keywords: Unique Proof Game, Impostor (gn gn), Homebase (s)
Pieces: sr = Gnu (GN)
Genre: Retro, Fairies
Computer test: C+ WinChloe v3.52
FEN: r*1nbqkb*1nr/ppp1pppp/B4P2/8/2P5/8/PPK3PP/R*1NB3R1
Input: A.Buchanan, 2021-02-19
Last update: A.Buchanan, 2021-11-02 more...
63 - P1386852
Mykola Kolesnik
Roman Zalokotsky

Chorno-bili stezhyny 4(53), p. 29, 10-12/2016
1. Preis
JT Waleri Stankewitsch-85
PR Alexandr Semenenko
P1386852
(3+13) C+
h#5
b) Sc4->e4
a) 1. Db2 Sf1 2. Ld4 Se2 3. Kc5 Sc1 4. Kb4 Se3 5. Kc3 Sd5#
b) 1. Ta5 Sh3 2. Le3 Sg4 3. Tg5 Sh6 4. Ke5 Sxf2 5. Kf4 Sd3#
play all play one stop play next play all
more ...
comment
Keywords: Unpinning (mehrfach), Remote selfblock (je 2 x), Exchange of roles (S-S), Model mate, Twin
Genre: h#
Computer test: Henrik Juel: C+ Popeye 4.61 (2021-02-26)
FEN: 7q/p2p4/1p1k4/2b5/2n5/5pp1/2pp1r1N/r5NK
Input: Gunter Jordan, 2021-02-26
Last update: James Malcom, 2021-02-27 more...
64 - P1388078
Ivan I. Antipin
Eduard Zarubin

9029 Seven Chess Notes 179 12/2020
spezielles Lob
Abt. h#>3
PR Alexander Semenenko
P1388078
(2+2) C+
h#6
0.1.1...
b) sBd4->c2
a) 1. ... exd4 2. Kf5 d5 3. Ke4 d6 4. Kd3 d7 5. Kc2 d8=D 6. Kb1 Dd1#
b) 1. ... e4 2. Kg5 e5 3. Kf4 e6 4. Ke3 e7 5. Kd2 e8=D 6. Kc1 De1#
play all play one stop play next play all
more ...
comment
Keywords: Ideal mate, Minimal (B), Promotion (D), Promotions to queens, Kindergarten Problem, Miniature, Twin
Genre: h#
Computer test: Popeye 4.61
FEN: 8/8/6k1/8/3p4/K3P3/8/8
Reprints: Seven Chess Notes 184, p. 13, 05/2021
Input: Gunter Jordan, 2021-04-02
Last update: Gunter Jordan, 2021-12-13 more...
65 - P1388551
Semion Shifrin
2901 Variantim 70 12/2016
P1388551
(2+8) C+
h#6
0.1.1...
b) in der Mattstellung wLc2 statt wSc2
a) 1. ... Sxa3 2. Kc5 Sxc2 3. Da4 Sxe1 4. Sb3+ Kc2 5. Kb4 Kb1 6. Ka3 Sc2#
b) 1. ... Lxe4 2. Da5 Kc2 3. Ka4 Kd3 4. c2 Kc4 5. c1=L Lc2 6. La3 Lxb3#
play all play one stop play next play all
more ...
comment
Keywords: Remote selfblock, Ideal mate (in b), Klasinc theme (S-K in a), Minimal (L), Model mate (in a), Switchback (S in a), Capture key, Selfblock (in b), Twin
Genre: h#
Computer test: SCHRECKE: a)+b): C+, Gustav 4.1d, Brute Force (2021-04-14) a)+b): C+, Gustav 4.1d, Brute Force
FEN: 8/8/8/3k4/2N1p3/p1p5/q1p5/n1K1n3
Input: Gunter Jordan, 2021-04-14
Last update: Alfred Pfeiffer, 2021-07-08 more...
66 - P1389597
Aleksey Ivunin
Aleksandr Pankratiev

8759 Seven Chess Notes 174 07/2020
P1389597
(3+3) C+
h#6
0.1.1...
b) sKd4->d3 (-wLd3)
a) 1. ... Lf5 2. Kd5 d4 3. Te5 dxe5 4. Tf6 exf6 5. Kd6 f7 6. Ke7 f8=D#
b) 1. ... Kxh6 2. Ke4 d4 3. Kf5 d5 4. Kf6 d6 5. Kf7 d7 6. Kg8 dxe8=D#
play all play one stop play next play all
more ...
comment
Keywords: Excelsior white, Ideal mate (in b), Promotion in the mating move, Promotions to queens, Twin, Miniature, Minimal (B in b)
Genre: h#
Computer test: C+, Gustav 4.1d, Brute Force
FEN: 4r3/6K1/7r/8/3k4/3B4/3P4/8
Input: Gunter Jordan, 2021-05-14
Last update: Alfred Pfeiffer, 2021-08-16 more...
67 - P1391332
Jean Morice
Themes-64 1963
2. Preis
P1391332
(10+10)
#2
b) sLh1 nach h2
a) 1. Lb2!
b) 1. Sf1!
play all play one stop play next play all
Henrik Juel: a) is C+ Popeye 4.61
b) has six threats and a dual (2021-12-03)
comment
Keywords: Twin
Genre: 2#
FEN: qr4n1/pr3p2/1p1k1p2/5P2/3B4/1N3BP1/2RN4/1K1RQ2b
Reprints: 3872 Schach-Echo 5, p. 80, 03/1965
Input: Dieter Berlin, 2021-07-03
Last update: Alfred Pfeiffer, 2021-12-03 more...
68 - P1391333
Andre Caresmel
Themes-64 1963
1. Preis
P1391333
(9+7) C+
#2
b) nach dem Schlüsselzug
a) 1. Db7! (Zugzwang)
1. ... Sc6,Sb~ 2. Db3#
1. ... Sd5 2. Dd7#
1. ... Sf6 2. Txe7#
1. ... exd6 2. Df7#

b) 1. De4! (Zugzwang)
1. ... Sc6,Sb~ 2. Dc4#
1. ... Sd5 2. Df5#
1. ... Sf6 2. exf6#
1. ... exd6 2. exd6#
play all play one stop play next play all
more ...
comment
Keywords: Twin (Mattwechsel)
Genre: 2#
Computer test: popeye 4.87
FEN: 2K3nB/4p2R/p2Nk2p/P1P1P2p/1n2Q2P/8/8/8
Reprints: 3871 Schach-Echo 5, p. 80, 03/1965
Input: Dieter Berlin, 2021-07-03
Last update: Alfred Pfeiffer, 2021-12-07 more...
69 - P1391341
Gianni Donati
v Best Problems 50 04/2009
2nd Honourable Mention,
E. Minerva 45 JT
P1391341
(13+14) C+
BP in 22.0
1. h4 a5 2. Th3 a4 3. Tb3 axb3 4. Sc3 bxa2 5. b3 d5 6. La3 Lf5 7. Db1 e6 8. Kd1 Dg5 9. hxg5 c5 10. g6 Sc6 11. gxh7 g5 12. Kc1 Lg6 13. Kb2 f5 14. Dd1 Sf6 15. Sb1 Tg8 16. h8=T 0-0-0 17. Th1 Lh6 18. Kc3 Tg7 19. Kd3 c4 20. Ke3 c3 21. Lc1 g4+ 22. f4 gxf3ep+
play all play one stop play next play all
HJ: last moves were something like 21... g5-g4+ 22.f2-f4 gxf3ep+
so it suffices to test the position with Pf3 on g5 and a wP added on f2
C++ means C+ plus that no shorter solution can be found.
A.Buchanan: The definition of Pronkin seems over-narrow, in two ways:
(1) The original officer must be captured: why? Standardization of material can be achieved by later Ceriani-Frolkin of the promoted officer, or (if S or T) by capture of another officer. In *any* of these three cases, it's an achievement for the promoted unit to have doing a homecoming.
(2) And this capture must happen *before* the homecoming of promoted officer: again why? This is a similar timing irrelevancy to "Phoenix", where the proper concept is "Nix".
So there are all these other fine scenarios which are completely nameless. Not to moan: how to fix all this? (2021-07-04)
A.Buchanan: @Henrik, I like your concept of "C++" (the well-known programming language). For positions with checks in the final diagram clearly testing n & n-1.0 suffices. Where there is no check in the final diagram, then the testing should be n, n-0.5, n-1.0 & n-1.5. Even though this is a bit of a bore, in most cases the other cases are very quick. This is the minimum set of tests necessary to *guarantee* no shorter PGs exist. To me, it seems worth pushing that extra yard, because otherwise C++ will be tarred with the same subjective incompleteness as C+. (2021-07-04)
comment
Keywords: Unique Proof Game, Valladao Task, Castling (sg), Promotion (T), Phoenix (T), Pronkin Theme (T), Impostor (Th1)
Genre: Retro
Computer test: C++ Euclide 1.01
FEN: 2kr4/1p4r1/2n1pnbb/3p1p2/8/1Pp1Kp2/p1PPP1P1/RNBQ1BNR
Input: A.Buchanan, 2021-07-04
Last update: A.Buchanan, 2021-07-04 more...
70 - P1392123
Valery Barsukov
Phénix 316 03/2021
2. ehrende Erwähnung
Abteilung h#, Mehrzüger
Yves Tallec Memorial 2020-2021
PR Axel Gilbert
P1392123
(2+8)
h#6
0.1.1...
b) sTd5->d8
a) 1. ... Lc5 2. De6+ Le3 3. Kd6 Ke2 4. Ke5 Lxg5 5. Lh7 Ke3 6. Lf5 Lf4#
b) 1. ... Lf8 2. Dc8 Ke2 3. Le6 Ke3 4. Ld7 Kd4 5. Tb6 Kc5 6. Tb7 Ld6#
play all play one stop play next play all
SCHRECKE: a)+b): C+, Gustav 4.1d, Brute Force (2021-07-26)
comment
Keywords: Minimal (L), Twin, Model mate, Selfblock, Remote selfblock (in a), Echo
Genre: h#
FEN: 6b1/2k1B3/5r2/3r2p1/6qp/6p1/8/4K3
Input: Gunter Jordan, 2021-07-26
Last update: Marcin Banaszek, 2022-08-08 more...
71 - P1392542
Zoltan Labai
Leninski Sawet 30/12/2018
4.-5. Lob
P1392542
(5+2)
#4
b)Sb3->e7
a) 1. Sa5! Kb8 2. Ld5 Ka8 3. Lxb7+ Kb8 4. Sd7#
2. ... Kc8 3. Lxb7+ Kd8 4. Sc6#

b) 1. Ld5! Kb8 2. Sd7+ Ka8 3. Sc6 bxc6 4. Lxc6#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 (2021-08-07)
comment
Keywords: Miniature, Twin
Genre: n#
FEN: k7/1p6/1P3N2/8/8/1N5K/B7/8
Input: Rainer Staudte, 2021-08-07
Last update: Gunter Jordan, 2021-08-07 more...
72 - P1394551
Hans-Peter Reich
Achim Schöneberg

2233 Gaudium 249 09/2021
P1394551
(7+7)
hs#3
b) wBg3 nach h3
a) 1. Lxa4 Tg1 2. Tc2+ Kf1 3. Lxb4 Th1#
b) 1. Le4 Le1 2. Lxg2 Kd2 3. Lxf1 Lxf2#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 also (2022-04-14)
comment
Keywords: Twin, Zilahi, Exchange of roles (t-l), Capture key (in a), Model mate (in b)
Genre: Fairies
Computer test: WinChloe 3.52
FEN: 8/8/6p1/6Pp/pb5K/B5P1/2B1kPp1/2R2r2
Input: hpr, 2021-10-12
Last update: Gunter Jordan, 2022-04-14 more...
73 - P1394730
Kurt Keller
2969 ChessStar 20/10/2021
Rasim-100MT
Judge: Ferhat Karmil

P1394730
(8+9) C+
#10
b) wSa6>a4
a) 1. La6? illegal!
1. Lc8! Ka8 2. Sb4 Ka7 3. Sc2 Ka8 4. Sxd4 La7 5. Se6 Lb8 6. Sf8 Ka7 7. Sxg6 Ka8 8. Lb7+ Ka7 9. Se7 g6 10. Sc8#
6. ... La7? 7. Lb7+ Kb8 8. Sd7#
5. ... Kb8 6. Ld7 Ka8 7. Sxc7+ Kb8 8. Sa6+ Ka8 9. c7 Lb8 10. cxb8=D#
9. ... Kb7 10. c8=D#
4. ... Ka7 5. Se6 ... (transposes into lines above)
2. ... La7? 3. Lb7+ Kb8 4. Sa6#

b) 1. Lc8?
1. La6! Ka8 2. Sb2 La7 3. Sc4 Lb8 4. Sd2 La7 5. Sf3 Lb8 6. Sh4 La7 7. Sxg6 Lb8 8. Lb7+ Ka7 9. Se7 g6 10. Sc8#
7. ... Kb8 8. Sf8 Ka8 9. Lb7+ Kb8 10. Sd7#
8. ... g6 9. Sd7+ Ka8 10. Lb7#
6. ... Ka7 7. Sxg6 ...
5. ... Kb8 6. Sh4 ...
4. ... Ka7 5. Sf3 ...
3. ... Kb8? 4. Se5 dxe5 5. fxe5 Ka8 6. Lb7+ Kb8 7. e6 f4 8. e7 f3 9. e8=D#
5. ... f4 6. e6 Ka8 7. Lb7+ ...
6. ... f3 7. e7 Ka8 8. Lb7+ ...
7. ... f2? 8. e8=D#
4. ... Ka8? 5. Lb7+ Kb8 6. Sd7#
2. ... Ka7 3. Sc4 ...
play all play one stop play next play all
Comments:
more ...
comment
Keywords: Twin, Model mate, Switchback, Pendulum, Selfblock, Annihilation, Springerwanderung, Stalemate dissolution, Flight-giving key, Stalemate avoidance, Corner mate
Genre: n#
Computer test: Gustav 4.1 d
FEN: 1b6/kBp3p1/NpPp2p1/1P1P1pP1/3p1P2/3K4/8/8
Input: Kurt Keller, 2021-10-20
Last update: Kurt Keller, 2022-04-03 more...
74 - P1394733
Andrew Buchanan
PDB Website 19/10/2021
to Tivadar "of Thorn" Kardos
P1394733
(13+12) C+
BP in 6,0
1. Sf3 e5 2. Sxe5 Dg5 3. Sc6 Dxd2+ 4. Dxd2 Sf6 5. Dxd7+ Sfxd7 6. Sxb8 Sxb8
play all play one stop play next play all
Suggested by P0000541. If Tivadar's problem had been a double homebase, it would have been the first in the world, pipping by 8 months P0002288, Andrey Frolkin's rendering of E.C.Mortimer.
See also: https://gatherer.wizards.com/pages/card/details.aspx?name=Tivadar%20of%20Thorn
The flavour text suggests the impostor theme: "His blade came down upon the neck of a goblin — but not the one he had charged. When Tivadar looked up, the world he had known was gone."
Since the beginning in 1993, Magic the Gathering has had white and black knights as a kind of homage to chess. These creatures have evolved and Tivadar of Thorn is literally a white knight, who in chess terms we see charging out from g1. There are two main kinds of white knight: the anti-black and the anti-red, and Tivadar is the latter.
YM: Sorry - two impostors were in P1329742 (2021-10-20)
A.Buchanan: Is there a mode for viewing PDB problems where one doesn't get to see the keywords (or the solution, which also a bit of a hint)? (2021-10-20)
A.Buchanan: Yes, YM, your P1329742 is very good. And single impostor in homebase:2 is demonstrated in PG in 4.0. I wanted to post this one because I was surprised to render the problem sound just by j'adoubing one unit to its home square! There's also an interesting artistic cross-over with Magic the Gathering. (2021-10-21)
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Keywords: Unique Proof Game, Homebase (2), Impostor (s), Quasi-symmetrical position
Genre: Retro
Computer test: C+ Euclide 1.01
FEN: rnb1kb1r/ppp2ppp/8/8/8/8/PPP1PPPP/RNB1KB1R
Input: A.Buchanan, 2021-10-20
Last update: A.Buchanan, 2021-10-24 more...
75 - P1394837
Nikolay N. Akimov
4405 Sächsische Zeitung 28/09/2021
P1394837
(4+4) C+
#2
b)Da8->h8
Henrik Juel: C+ Popeye 4.61 (2021-10-23)
comment
Keywords: Twin
Genre: 2#
Computer test: Popeye 4.61 Henrik Juel: C+ Popeye 4.61 (2021-10-23)
FEN: Q7/7B/8/8/8/8/pp1N3K/k1n5
Input: Rainer Staudte, 2021-10-23
Last update: Erich Bartel, 2021-10-24 more...
76 - P1395379
K. Regan
423 Chess Life and Review 05/1971
P1395379
(5+2) C+
#2
b)Bg3->g6
a) 1. f5! Ke5 2. De6#
1. ... c5 2. De6#
1. ... c6 2. Dd4#

b) 1. Db5! Ke6 2. De5#
1. ... c5 2. Dd7#
1. ... c6 2. De5#
play all play one stop play next play all
more ...
comment
Keywords: Minimal (b), Miniature, Twin, Changed mates
Genre: 2#
Computer test: Popeye 4.61
FEN: 3K4/2p5/3k4/8/2Q2P2/2P3P1/8/8
Input: Rainer Staudte, 2021-11-04
Last update: Gunter Jordan, 2021-11-04 more...
77 - P1396670
Rolf Wiehagen
Problemist Ukrainy Website 11/2021
3. Lob
Evgeniy Bogdanov 70 MT
Sektion h#3
P1396670
(3+12) C+
h#3
b) Stellung um 180° drehen
a) 1. e4-e3 Lb6-c5 2. Kf3-e4 Kh5-g4 3. d6xc5 Sb7xc5#
b) 1. La3-e7 Sg2-f4 2. Kc6-d6 Ka4-b5 3. e5xf4 Lg3xf4#
play all play one stop play next play all
more ...
comment
Keywords: Exchange of roles (L-S), Twinning by board rotation, Zilahi, Model mate (in b)
Genre: h#
Computer test: Popeye 4.83
FEN: 2n5/1N2p3/1B1p3b/3pp2K/3pp3/3b1k2/2p1p3/8
Input: Marcin Banaszek, 2021-12-06
Last update: Gunter Jordan, 2022-05-02 more...
78 - P1397421
Harald Grubert
10832 Ideal-Mate Review 78 04-06/2000
Lob
PR Eugene Albert
P1397421
(3+3)
h#4
b) wKf6->a4
a) 1. Sa3 Ke5 2. Kb5 Kd4 3. Ka4 Kc3 4. b5 b3#
b) 1. Sc3 Kb3 2. Sa4 b5 3. Ka5 Kc4 4. b6 b4#
play all play one stop play next play all
SCHRECKE: a)+b): C+, Gustav 4.2a, Brute Force (2021-12-22)
comment
Keywords: Pawn step variations, Chameleon Echo, Ideal mate, Selfblock, Twin, Checking key (in b), Miniature, Pawn mate, Remote selfblock, Switchback (s in b), Rücknahme Schlüsselzug (in b)
Genre: h#
FEN: 8/1p6/1k3K2/1n6/1P6/8/1P6/8
Reprints: 96 Hilfsmattvierer , p. 34, 2000
Input: Gunter Jordan, 2021-12-22
Last update: Gunter Jordan, 2023-10-31 more...
79 - P1398049
Miklos S. Locker
1072 De Waarheid 30/09/1967
P1398049
(5+1)
#2
b) wDb2->c1
a) 1. Lh4! (Zugzwang)
1. ... Ke3 2. De5#
1. ... Kf4 2. Dd4#


b) 1. Le7! (Zugzwang)
1. ... Kd4 2. Df4#
1. ... Ke5 2. De3#
play all play one stop play next play all

Duplicate Diagram: P1130667

No.58 im Problemturnier 'De Waarheid' 1967
SCHRECKE: a)+b): C+, popeye 4.87 (2022-01-08)
comment
Keywords: Miniature, Twin, Rex solus (s)
Genre: 2#
FEN: 3B4/8/4B3/8/4k3/8/1QK3P1/8
Input: Mario Richter, 2022-01-08
Last update: Gunter Jordan, 2022-01-09 more...
80 - P1398986
Werner Keym
Stuttgarter Zeitung 2021
P1398986
(6+1) C+
#2
b) Drehung um 90°
a) 1. Sf7+! Kxg6 2. Ld3#
b) Mit Drehung recht:
nicht 1. Sb6+? Kxc7 2. Lf4#
sondern b) 1. ... Kxc7! Lf4+ 2. Kc8 Sb6#
play all play one stop play next play all
Absichtlich wird nicht angegeben, in welche Richtung gedreht werden soll. Wenn man die Stellung um 90° im Uhrzeigersinn dreht (wKf4), gibt es keine zweizügige Lösung. Wenn man sie um 90° gegen die Uhr dreht (wKc5), entsteht eine Stellung, in der Schwarz nicht zuletzt gezogen haben kann.
Der Bauer ist entscheidend.
It is intentionally not specified in which direction to rotate. If you turn the position 90° clockwise (wKf4), there is no two-move solution. If you turn it 90° counterclockwise (wKc5), you get a position where Black cannot have moved last.
The pawn is decisive.
A.Buchanan: There are literally hundreds of problems in PDB where "Drehung um 90 Grad" means clockwise. So reading the text here, one thinks: "Oh the stipulation is wrong - I'll correct it." The joke is so slight against the noise that it's not worth bothering with. Better to have "which way?" in the stipulation. (2022-02-10)
A.Buchanan: Also the fourth orientation unmentioned has no solution. Somehow would be nice to make reference to that "for symmetry". Maybe publish the board with unshaded squares in a diamond orientation, and ask the solver to find the two orientations that work. (2022-02-10)
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comment
Keywords: Miniature, Symmetrical position, Rex solus (s), Asymmetrical solution, Twinning by board rotation
Genre: 2#
Computer test: a) C+ Popeye 4.61 b) HC+ Popeye 4.87 + trivial retro logic
FEN: 8/6N1/B3KBPk/6N1/8/8/8/8
Input: Alfred Pfeiffer, 2022-02-09
Last update: A.Buchanan, 2022-02-10 more...
81 - P1399435
Ralf Krätschmer
Die Schwalbe , p. 529, 10/2000
2nd Prize
P1399435
(11+10) C+
Mate in n#

a) #2
b) +wSg7 #3
c) +wLg7 #4
d) +wTg7 #5
e) +wDg7 #6
a) 1. g8=S! d2 2. Sh6#

b) 1. Se6! d2 2. Sd4 Kxf4 3. Sxf3#

c) 1. f7! d2 2. Ld4 Kxf4 3. Lf6+ Sd4 4. Txd4#

d) 1. Te7! d2 2. Te2 Sd4 3. Texg2+ Kxf4 4. Txd4+ Ke5 5. Te2#

e) 1. De7! d2 2. Te4 fxe4 3. Dxe4 Sf5 4. Dxf3+ Kh4 5. Df2+ Sg3 6. Dxg3#
play all play one stop play next play all
https://timkr.home.xs4all.nl/chess2/diary_8.htm

"The stronger the piece, the longer the mate."
Henrik Juel: Nice paradox (2022-02-25)
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comment
Keywords: Twin (Forsberg), Promotion (S), Stalemate avoidance
Genre: n#
Computer test: Popeye 4.61
FEN: 8/2K3P1/2p2Pp1/2P2pPp/2R2Pkn/2Pp1n1b/6p1/3B1NR1
Reprints: #141 Tim Krabbé's Website 2001
Input: James Malcom, 2022-02-25
Last update: James Malcom, 2022-02-25 more...
82 - P1399586
Andrew Buchanan
12559 feenschach 246, p. 176, 07-09/2021
nach Bernt Ahlgren
P1399586
(2+13) C+
h#3 (2.1...)
b) Rotate the board by 180°
a) WTM
1. ... Lxh2 2. Lc3 Lxf4 3. Le5 Lg5#
1. ... Lxf2 2. f3 Le3 3. De5 Lg5#
b) BTM (R: 1.b7-b8=L)
1. Td4 Lxc7 2. Ld3 Lg3 3. c4 Le1#
1. c6 Lf4 2. Lg5 Lc1 3. Ld2 Lb2#
play all play one stop play next play all
Numerous retro tries but none distinct in the retro twin a).
Henrik Juel: In part a) it is clear that White has the move, so the stipulation is really h#2.5
1... Lxh2 2.Lc3 Lxf4 3.Le5 Lg5#
1... Lxf2 2.f3 Le3 3.De5 Lg5#
In part b) last move was b7-b8=L
1.Td4 Lxc7 2.Ld3 Lg3 3.c4 Le1#
1.c6 Lf4 2.Lg5 Lc1 3.Ld2 Lb2#
Very good; the rotation changes everything, incl. preventing the former mates on g5, now b4 (2022-03-02)
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comment
Keywords: Twinning by board rotation, No legal last move for White, Minimal
Genre: h#, Retro
Computer test: forgot to mention C+ Popeye 4.61
FEN: 8/5p1p/4rk1K/5b1p/5ppp/8/5p1q/4b1Br
Reprints: Discord Chess Problems & Studies Server 02/03/2022
Input: A.Buchanan, 2022-03-02
Last update: A.Buchanan, 2023-12-06 more...
83 - P1399733
Anton Bidlen
Tehtäväniekka 01/20 01-03/2020
6. ehrende Erwähnung
Osmo Kaila 100 MT
PR Janne Syväniemi
P1399733
(4+4)
h#5
b) sKc4->c3
a) 1. Sc3 Ke1 2. Sd5 Kd2 3. Se7 dxe7 4. d6 e8=D 5. d5 Da4#
b) 1. Sa3 Ke2 2. Sb5 Kf3 3. Sc7 dxc7 4. Kd2 c8=D 5. Ke1 Dc1#
play all play one stop play next play all
SCHRECKE: a)+b): C+, Gustav 4.2a, Brute Force (2022-03-09)
comment
Keywords: Entblockung, Model mate, Promotion (D), Twin
Genre: h#
FEN: 8/3p4/3P4/8/2kP4/6p1/6P1/1n3K2
Input: Gunter Jordan, 2022-03-09
Last update: Gunter Jordan, 2022-03-09 more...
84 - P1401108
Joachim Hambros
Discord Chess Problems & Studies Server 2/5/2022
P1401108
(12+15) C+
BP in 12,5
1. b4 g6 2. Lb2 g5 3. Lxh8 g4 4. Sc3 g3 5. Db1 gxh2 6. Db3 hxg1=T 7. 0-0-0 Txf1 8. Th6 Th1 9. Ta6 Th5 10. Th1 Ta5 11. Kd1 Txa2 12. Ke1 Tb2 13. Ta1
play all play one stop play next play all
A.Buchanan: Terrific composition, by a new composer (2022-05-04)
Henrik Juel: Welcome back, Andrew
Yes, a very impressive proof game:
The white rooks switch places, [Pg7] goes slowly to create a Phenix, and the white king backtracks after castling
The motivations for this fine content are fairly simple, so I can only hope that it has not been done before (2022-05-04)
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Keywords: Unique Proof Game, Phoenix (t), Impostor (TT), Castling Paradox (Hidden wg), Tempo Move
Genre: Retro
Computer test: C++ Euclide 1.01
FEN: rnbqkbnB/pppppp1p/8/8/1P6/1QN5/1rPPPPP1/R3K2R
Input: A.Buchanan, 2022-05-04
Last update: A.Buchanan, 2022-05-04 more...
85 - P1401280
Michel Caillaud
2877 Problemskak , p. 3, 2022
1. Lob
Björn Enemark 80-JT
PR Björn Enemark
P1401280
(3+6)
h#5
b) sDh4->h5
a) 1. Kd5 Kd3 2. Ld6 c3 3. Td4+ cxd4 4. Tc6 f3 5. De4+ fxe4#
b) 1. Tg5 Kd4 2. Ld7 c4 3. Td5+ cxd5 4. Tc7 f4 5. De5+ fxe5#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 (2022-05-12)
Yuri Bilokin: Redaction: Yuri Bilokin after Michel Caillaud bRg4-f4, bQh4-g5 8/4b3/3kb3/6q1/5r2/2K5/2P2P2/2r5 (3+6) h#5 2.1…
1.Kd5 Kd3 2.Bd6 c3 3.Rd4+ cxd4 4.Qe3+ fxe3 5.Rc6 e4# (IM)
1.Rf5 Kd4 2.Bd7 c4 3.Rd5+ cxd5 4.Rc7 f4 5.Qe5+ fxe5# (IM) (2022-05-17)
comment
Keywords: Pawn mate, Bauernschlag-Varianten, Pawn step variations, Chameleon Echo, Echo, Ideal mate, Selfblock, Twin
Genre: h#
FEN: 8/4b3/3kb3/8/6rq/2K5/2P2P2/2r5
Input: Gunter Jordan, 2022-05-12
Last update: Gunter Jordan, 2022-05-12 more...
86 - P1402582
Nikolay S. Zinovyev
133 Smena (Moskwa) 12/1997
P1402582
(4+1)
#3
b) Platztausch sKh5 - wLd1
a) 1. Tg8! (Zugzwang)
1. ... Kxh4 2. Kf2 Kh3 3. Th8#
1. ... Kh6 2. Lc2 Kh5 3. Th8#

b) 1. Ke3+! Kc1 2. Lg6 Kd1 3. Tg1#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 (2022-07-09)
comment
Keywords: Rex solus (s), Twin, Checking key (in b), Discovered check (in b), Ideal mate (in a), Model mate (in b)
Genre: 3#
FEN: 8/8/8/7k/7P/5K2/6R1/3B4
Input: Mario Richter, 2022-07-09
Last update: Gunter Jordan, 2022-07-09 more...
87 - P1403523
Manfred Nieroba
863 Problemskak 18 04-06/2012
P1403523
(3+4)
h#2
Circe
b) wKg1->b4
a) 1. Txh7[+wTh1] Kg2+ 2. Txh4[+wSg1] Sf3#
b) 1. Txh4[+wSg1]+ Kc3 2. Txh7[+wTh1] Sh3#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 also (2022-08-06)
comment
Keywords: Circe, Miniature, Schlagwechsel (sTh5), Twin, Capture key
Genre: Fairies
Computer test: Popeye Windows-64Bit v4.87 (11 GB)
FEN: 8/7R/8/3p3r/7N/8/4p3/4k1K1
Input: Björn Enemark, 2022-08-06
Last update: Gunter Jordan, 2022-08-06 more...
88 - P1403608
Olaf Jenkner
19063 Die Schwalbe 316 08/2022
P1403608
(6+16) C+
ser-s#12
b) wSd4->d3
a) 1. Lxh7 2. Lxg8 3. Lh7 4. Le4 5. Sf5 6. d4 7. d5 8. d6 9. dxc7 10. cxb8=S 11. Sxd7 12. Sf6 exf6/gxf6#
b) 1. Sh5 2. Sdf4 3. d4 4. d5 5. d6 6. dxc7 7. cxb8=T 8. Txb7 9. Txd7 10. Td4 11. Te4 12. Sxg7 Lxg7#
play all play one stop play next play all
Olaf Jenkner: Vergleiche mit P1407730 (2023-02-11)
comment
Keywords: Homebase (s), Seriesmover, Twin, under-promotion (S, T), Selfblock, Exchange of Promotions, Capture key (in a)
Genre: Fairies
Computer test: O. Jenkner: Gustav 4.2 a
FEN: rnbqkbnr/pppppppp/4P3/4KB2/3N1N2/8/3P4/8
Input: Olaf Jenkner, 2022-08-10
Last update: Olaf Jenkner, 2023-02-11 more...
89 - P1403678
Valery Ivanov
10066 Seven Chess Notes 199 08/2022
P1403678
(4+3)
#3
b) wDh4->e2
a) 1. Sc6! c4 2. De7+ Kd5 3. De5#
1. ... Kc7 2. Dd8+ Kb7 3. Sa5#
1. ... Kd5 2. Df4 ... 3. Se7#
2. ... c4 3. De5#
1. ... Lb6 2. De7+ Kd5 3. De6#

b) 1. Sd5! c4 2. De7+ Kxd5 3. De5#
1. ... Kxd5 2. Dd3#
1. ... Kd7 2. De7+ Kc8 3. Dc7#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 (2022-08-16)
comment
Keywords: Miniature, Twin
Genre: 3#
FEN: 8/b3N3/3k4/1Pp2K2/7Q/8/8/8
Input: Rainer Staudte, 2022-08-16
Last update: Gunter Jordan, 2022-08-16 more...
90 - P1403679
Vladimir Kozhakin
Anastasia P. Bazhan

10065 Seven Chess Notes 199 08/2022
P1403679
(5+2)
#3
b) wLh2->a3
a) 1. Dc4! Kf5 2. Dc6 ... 3. Lh3#
2. ... Kg4 3. Dg6#
1. ... Ke3 2. Dxd4+ Ke2 3. Dd2#

b) 1. Se5+! Ke3 2. Lc1+ Ke2 3. Df1#
1. ... Kxe5 2. Le7 ... 3. Df6#
play all play one stop play next play all
SCHRECKE: a)+b): C+, popeye 4.87 (2022-08-16)
comment
Keywords: Minimal (b), Miniature, Twin, Checking key (in b), Discovered check (in b)
Genre: 3#
FEN: 8/5Q2/K7/8/3pk3/5N2/6BB/8
Input: Rainer Staudte, 2022-08-16
Last update: Gunter Jordan, 2022-08-16 more...
91 - P1403684
Petrasin Petrasinovic
10060 Seven Chess Notes 199 08/2022
P1403684
(5+2)
#3
b) wSh7->g4
a) 1. Sf8! c5 2. Dd7+ Ke5 3. De6#
1. ... Kc5 2. Sg6 Kd6 3. De7#
1. ... Ke5 2. De7+ Kf5 3. Lg6#

b) 1. Sh6! c5 2. Lc4 Kd5 3. Sf7#
2. ... Ke5 3. De7#
1. ... Kc5 2. Sg8 Kd6 3. De7#
1. ... Ke5 2. De7#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 (2022-08-16)
comment
Keywords: Minimal (b), Miniature, Twin
Genre: 3#
FEN: 8/1Q3B1N/2pk4/8/8/4P2K/8/8
Input: Rainer Staudte, 2022-08-16
Last update: Gunter Jordan, 2022-08-16 more...
92 - 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...
93 - P1404297
E. W. Hearn
514 Los Angeles Times 18/11/1934
P1404297
(4+3)
#3
b) a1=h8
a) 1. Sf5! g3 2. Sd4 ... 3. Sf3#
b) 1. Ta2! Ka5 2. Kc5 bxa4 3. Sc4#,Sb3#
1. ... bxa4 2. Tb2+ Ka3,Ka5 3. Sc4#
1. ... a5 2. Sb1 bxa4 3. Tb2#
play all play one stop play next play all
Henrik Juel: a) double threat 2.Le8,Lf7 (2022-09-13)
comment
Keywords: Miniature, Twinning by board rotation
Genre: 3#
FEN: 7R/4N3/8/4K1kB/6p1/7p/8/8
Input: Rainer Staudte, 2022-09-13
Last update: Gunter Jordan, 2022-09-13 more...
94 - P1404474
Jean Lochet
18834 Die Schwalbe 313, p. 446, 02/2022
Horatio Bolton
P1404474
(4+1)
#7
b) wSa5=wLc7
a) 1. Sb7! Kd5 2. Sd8 Kd4 3. Sf7 Kd5 4. Se5 Kd4 5. Sd3 Kd5 6. Sb4+ Kd4 7. c3#
b) 1. Ld8! Kd5 2. Tc7 Ke6 3. Ke4 Kd6 4. Kf5 Kd5 5. Lf6 Kd6 6. Le5+ Kd5 7. c4#
2. ... Kd4 3. Lf6 Kd5 4. Kf5 Kd6 5. Le5+ Kd5 6. c4#
2. ... Kd6 3. Kf5 Kd5 4. Lf6 Kd6 5. Le5 Kd5 6. c4#
play all play one stop play next play all
18834 (Jean Lochet). a) 1.Sb7! Kd5 2.Sd8 Kd4 3.Sf7 Kd5 4.Se5 Kd4 5.Sd3 Kd5 6.Sb4+ Kd4 7.c3#; b) 1.Ld8! Kd5 2.Tc7 Ke6 (2.– Kd4 3.Lf6 Kd5 4.Kf5 Kd6 5.Le5+ Kd5 6.c4#, 2.– Kd6 3.Kf5 Kd5 4.Lf6 Kd6 5.Le5 Kd5 6.c4#) 3.Ke4 Kd6 4.Kf5 Kd5 5.Lf6 Kd6 6.Le5+ Kd5 7.c4#. Frank Fiedler, Karl-Heinz Siehndel und Hartmut Jäger haben auf einen Vorläufer von Horatio Bolton hingewiesen. Ausführlich beschrieben hat dies HJä: „Die Aufgabe von Horatio Bolton findet sich in der PDB als P1158653. Weiß: Kf4 Tc8 Sd8 Bc2 Schwarz: Kd4 mit der Lösung: 1.Tc7! Kd5 2.Tc6 Kd4 3.Sf7 Kd5 4.Se5 Kd4 5.Sd3 Kd5 6.Sb4+ Kd4 7.c3#. Das Stück ist in der Folge vielfach nachgedruckt worden. . . . Erst in den 1980er Jahren tauchte dann aber eine Nebenlösung (1.Sf7!) auf, die in der französischen Zeitschrift Thèmes-64 1984 publiziert wurde. Die im Vorspann genannte Aufgabe (P1158629) von H. Walter ist für meinen Geschmack im Wesentlichen nur eine Korrekturfassung zu Boltons Original, entsprechend natürlich auch die Diagrammstellung von J. Lochet. Ein bezaubernder, in echoartigen Farbwechsel- Idealmatts mündender Fünfsteiner-Zwilling!“ Die Frage, ob dies aus heutiger Sicht tatsächlich noch ein „Inhalt“ ist, wird selbstverständlich gestattet. :-)

Duplicate Diagram: P1158629

vf: a1<>h1, Iwan Suworow, 1980, (wo?); wSa5->a7, Aleksandr Galizki, 1912, Magyar Sakkujsag

Bolton = P1158653
Henrik Juel: C+ Popeye 4.61 (2022-09-19)
comment
Keywords: anticipated ((a) P1158629), Miniature, Rex solus (s), Twin
Genre: n#
FEN: 8/8/2R5/N7/3k1K2/8/2P5/8
Input: Felber, Volker, 2022-09-19
Last update: Gunter Jordan, 2022-09-19 more...
95 - P1404948
Anirudh Daga
18941 Die Schwalbe 314 04/2022
P1404948
(14+11)
Beweispartie in 6,5 Zügen
b) +sBc7
c) d7->c7
a) 1. d4 e5 2. dxe5 Ld6 3. exd6 Dg5 4. dxc7 Dxc1 5. cxb8=L Dxb1 6. Lf4 Dc1 7. Lxc1
b) 1. Sf3 e5 2. Sxe5 Sc6 3. Sxc6 Lb4 4. Sxd8 Lxd2+ 5. Sxd2 Kxd8 6. Sf3 Ke8 7. Sg1
c) 1. Sc3 d5 2. Sxd5 Sd7 3. Sxe7 Sdf6 4. Sxg8 Dxd2+ 5. Dxd2 Ld6 6. Dxd6 Sxg8 7. Dd1
play all play one stop play next play all
Singapur, 13 Jahre alt, mit Andrew Buchanan und James Quah: https://www.thehoppermagazine.com
LaTeX-import:
Keyword not uniquely identified: s in c)
Henrik Juel: C++ Euclide 1.01 (2022-11-05)
Henrik Juel: Good proof games, Anirudh (2022-11-05)
comment
Keywords: Homebase (2), Pronkin Theme (L,,), Switchback (,,D), Impostor (,S,)
Genre: Retro
FEN: r1b1k1nr/pp1p1ppp/8/8/8/8/PPP1PPPP/R1BQKBNR
Input: Stefan Höning, 2022-10-07
Last update: A.Buchanan, 2022-11-05 more...
96 - P1406712
Kurt Keller
12857 feenschach 250, p. 1023, 10-12/2022
Frohe Ostern
P1406712
(3+5) C+
h=4
b) an der mittleren Horizontale gespiegelt (Kc1/Kc3)
a) 1. b5 Kd8 2. bxc4 Ke7 3. Kd5 Kf6 4. c6 Kf5=
b) 1. Kb4 Le4 2. Ka3 Lxd3 3. Ka2 Lxc4 4. Ka1 Lxb3=
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Comments:
  • Author – Kurt Keller (Ulm, Germany)
  • Für den Ostergruß wurde das Problem offensichtlich zu früh gebracht. Das Problem selbst ist jedoch für die Weihnachtszeit geeignet, da die beiden Kreuze auch als Weihnachtsbaum oder Kerze betrachtet werden können. (The problem was obviously brought up too early for the Easter greeting. However, the problem itself is suitable for the Christmas season because the two crosses can also be considered a Christmas tree or candle.) Vergleiche (Compare) P1388082
  • Source: Urdruckteil_250.pdf on http://www.feenschach.de

Henrik Juel: solutions
a) 1.b6-b5 Kc8-d8 2.b5*c4 Kd8-e7 3.Kc6-d5 Ke7-f6 4.c7-c6 Kf6-f5 =
b) 1.Kc3-b4 Bc6-e4 2.Kb4-a3 Be4*d3 3.Ka3-a2 Bd3*c4 4.Ka2-a1 Bc4*b3 = (2022-12-14)
comment
Keywords: Symbol problem (Doppelkreuz), Twin, Asymmetrical solution, Selfblock, Passive sacrifice, Annihilation, Remote selfblock, Sacrifice of white pieces, Sacrifice of black pieces, Active sacrifice (L), Symbol problem (Kerze), Symbol problem (Weihnachtsbaum)
Genre: Fairies
Computer test: Gustav 4.1 d
FEN: 2K5/2p5/1pkp4/2p5/2P5/2B5/8/8
Input: Kurt Keller, 2022-12-14
Last update: Kurt Keller, 2023-01-06 more...
97 - P1406823
Valery Barsukov
12578 feenschach 246 07-09/2021
P1406823
(2+10)
h#6
Zeroposition
a) wLh2->a1
b) sKd7->d4
a) 1. Ta2 Lxc3 2. Kc6 Kd2 3. Kb5 Kd3 4. Ka4 Kc4 5. Ka3 Kb5 6. Sb2 Lb4#
b) 1. Ke3 Le5 2. Lg5 Lxc3 3. Kf4 Kd2 4. c1=L+ Kd3 5. Tg2 La5 6. Tg4 Lxc7#
play all play one stop play next play all
SCHRECKE: a)+b): C+, Gustav 4.2e, Brute Force (2023-12-15)
comment
Keywords: Minimal (L), Zeroposition, Twin, under-promotion (l in b), Selfblock, Remote selfblock, Model mate, Blockfeldwechsel
Genre: h#
FEN: 3b4/2pk4/8/5p2/8/1pp2p2/1rp4B/2Kn4
Input: Gunter Jordan, 2022-12-25
Last update: Gunter Jordan, 2023-12-15 more...
98 - P1407452
Geoff Foster
PS3832 The Problemist Supplement 179, p. 235, 07/2022
P1407452
(2+5) C+
h#5
b) wKa2->a1
a) 1. Df5 Kb3 2. Tf6 Kc3 3. Se6 Kd2 4. Ke5+ Ke3 5. Td5 Sc4#
b) 1. Kd4 Ka2 2. Kc3 Ka3 3. Td2 Sc4 4. Sd3 Sd6 5. Tc4 Sb5#
play all play one stop play next play all
Yuri Bilokin: possibly wKa2-a1 3r4/8/2r5/3k4/5n2/8/1Nq5/K7 (2+5) h#5.5*
1... ... 2.Kd4 Ka2 3.Kc3 Ka3 4.Rd2 Sc4 5.Sd3 Sd6 6.Rc4 Sb5# (IM)
1...Ka2 2.Qf5 Kb3 3.Rf6 Kc3 4.Se6 Kd2 5.Ke5+ Ke3 6.Rd5 Sc4# (IM) (2023-02-04)
comment
Keywords: Discovered check (in a), Aristocrat, Echo, Remote selfblock (in a), Ideal mate, Miniature, Minimal (S), Selfblock, Twin
Genre: h#
FEN: 3r4/8/2r5/3k4/5n2/8/KNq5/8
Input: Gunter Jordan, 2023-01-27
Last update: Felber, Volker, 2023-02-07 more...
99 - P1407730
Mark Kirtley
The Problemist Supplement 2021
P1407730
(5+16) C+
ser-s#7
b) wSg4->h4
a) 1. Lb2 2. Lbxg7 3. Lf6 4. Lh4 5. Tg5 6. De4 7. S4f6+ Sxf6#
b) 1. Dxg7 2. Sg6 3. S6xe7 4. Sxg8 5. Kh6 6. Th5 7. Sf6 Dxf6#
play all play one stop play next play all
Matts auf dem gleichen Feld.
Olaf Jenkner: Das schöne Diagramm wird mit sieben Nachtwächtern links oben erkauft.
Vergleiche mit P1403608 (2023-02-11)
more ...
comment
Keywords: Pinning, pin-mate (in b), Homebase (s), Line closing, Capture key (in b), Selfblock, selfpinning (in b), Seriesmover, Twin
Genre: Fairies
Computer test: H. Juel: Popeye 4.61
FEN: rnbqkbnr/pppppppp/6Q1/5R1K/6N1/B7/8/8
Reprints: zu 19063 Die Schwalbe 319, p. 56, 02/2023
Input: Gunter Jordan, 2023-02-10
Last update: Olaf Jenkner, 2023-02-11 more...
100 - P1408199
Vyacheslav Pilchenko
SuperProbl SuperProblem (Website) 10/03/2023
P1408199
(6+1)
#2
b) wSg3->c5
a) 1. Se3? A Kx3 a 2. Df8,Df7# B,C
1. ... Ke5!

1. Df8! B Kxf3 a 2. Se3# A
1. ... Ke5 b 2. Dd6#
1. ... Kg5 c 2. Dh6#

b) 1. ... Kxf3 a 2. Dg3#

1. Sd7? droht 2. Dg4 #
1. ... Kxf3! a

1. Sd6?,Sf~ droht 2. Dg3#
1. ... Ke5! b

1. Dd5? droht 2. Se6# D
1. ... Kg5! c

1. Df7! C Kxf3 a 2. Se3# A
1. ... Ke5 b 2. Sd3#
1. ... Kg5 c 2. Se6# D
play all play one stop play next play all

Duplicate Diagram: P1138914

Henrik Juel: diagram error: white Sf5, not K
then C+ Popeye 4.61 (2023-03-11)
comment
Keywords: Reversal 1, Dombrovskis theme, Changed mates, Rex solus (s), Twin, Miniature
Genre: 2#
FEN: 6Q1/8/8/5N2/5k2/5PN1/5P2/3K4
Input: Rainer Staudte, 2023-03-11
Last update: Felber, Volker, 2023-03-12 more...
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