Chess Problem Database Server

90 problem(s) found in 2876 milliseconds (displaying 90 problem(s)). [COMMENTDATE>=20220810 AND NOT K='Blocklenkung' AND K='Zwilling'] [download as LaTeX]

1 - P0001550
Michel Caillaud
421 Europe Echecs 295 07/1983
A. Hazebrouck gewidmet
1. Preis

(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+
play all

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...

2 - P0001629
Andrey Frolkin
498 Europe Echecs 355/356 07-08/1988
2. ehrende Erwähnung

(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
play all

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...

3 - P0003720
Yuri Markovic Gordian
4496 Schach , p. 30, 01/1964

(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

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...

4 - P0009046
Peter Wong
9923 Die Schwalbe 169 02/1998
4. Preis

(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
play all

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...

5 - P1000642
Satoshi Hashimoto
R048 Probleemblad 03/1999
3. Preis

(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
play all

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)
more ...
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...

6 - P1000659
Michel Caillaud
R071 Probleemblad 11/1999

(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
play all

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...

7 - P1008813
Klaus Wenda
10726 Die Schwalbe 182 04/2000

(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]#
play all

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:

= 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...

8 - P1008913
Rolf Wiehagen
Achim Schöneberg
10906 Die Schwalbe 185 10/2000

(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

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...

9 - P1013083
Roberto Osorio
Jorge Joaquin Lois
Oscar Cuasnicú
R230 Probleemblad 02/2004
3. Lob

(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

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...

10 - P1013131
Eric Pichouron
R138 Problemesis 38 04/2004

(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

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...

11 - P1014577
Jewgeni F. Tischtschenko
Magadanski Komsomolez 03/06/1990

(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

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...

12 - P1017476
Joachim Iglesias
R146 Problemesis 06/2004
G. Wilts und E. Pichouron gewidmet

(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
play all

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...

13 - P1066732
Eric Pichouron
PCCC Meeting 09/2004
3. ehrende Erwähnung Champagne TT 2004

(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

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...

14 - P1066789
Göran Wicklund
R259 Probleemblad 5 09-10/2004
5. Preis

(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
play all

Zyklischer Platzwechsel sechs weißer Türme.

more ...
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...

15 - P1068194
Gianni Donati
9926 Thema Danicum 121 01/2006

(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
play all

5zügiger Rundlauf der wD und Platzwechsel der wSS.

Reto: A lot faster with Stelvio 1.25, finished in about 1min. (2023-05-29)
more ...
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...

16 - P1072567
Juri Trepalin
Redkiye zhanry-plus 2007
3. Lob

(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

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...

17 - P1080540
Paul Raican
P0221 StrateGems 42 04-06/2008
1. Lob

(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
play all

paul: Quickly solved by Stelvio. (2023-03-12)
more ...
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...

18 - P1106507
Ken Kousaka
FIDE World Cup 2010
1. Lob
FIDE World Cup, Retros

(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
play all

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)
more ...
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...

19 - P1202228
Hartmut Brozus
12333 Die Schwalbe 08/2004
Lob

(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

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...

20 - P1252658
Horst Böttger
781 Gaudium (123) 15/09/2012

(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

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...

21 - P1252797
Michel Caillaud
Klaus Wenda
G14/33 feenschach 138, p. 411, 10-12/2000

(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#
play all

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...

22 - P1295956
Michel Caillaud
6965 Phénix 241, p. 9623, 07-08/2014

(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

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)
more ...
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...

23 - P1319410
Karol Mlynka
1263 Gaudium 156 10/2015

(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#
play all

SCHRECKE: a)+b): C+, popeye 4.89 (2023-11-06)
comment

Keywords: pin-mate, Exchange of roles (Ta7-Lc6), Twin
Pieces:

= Transmuting king (TK),

= 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...

24 - P1339612
Roberto Osorio
Jorge Joaquin Lois
R496 The Problemist 2015-2016
1. ehrende Erwähnung
The Problemist 2015-2016

(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+
play all

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...

25 - P1340215
Roberto Osorio
Jorge Joaquin Lois
R470 The Problemist vol.24-8, p. 341, 03/2014
after Satoshi Hashimoto
Lob
The Problemist 2013-2014

(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
play all

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...

26 - P1347831
Kenneth Solja
Harri Hurme
13846 Springaren 143 03/2017
5. Preis

(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#
play all

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...

27 - P1384733
Silvio Baier
Nicolas Dupont
Phénix 2012-2013
1. Preis

(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

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...

28 - P1385885
Gennady Chumakov
18277 Die Schwalbe 304 08/2020
Lob
Abt. h#3,5-n
PR Fadil Abdurahmanovic

(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

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...

29 - P1403608
Olaf Jenkner
19063 Die Schwalbe 316 08/2022

(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

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...

30 - P1403678
Valery Ivanov
10066 Seven Chess Notes 199 08/2022

(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

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...

31 - P1403679
Vladimir Kozhakin
Anastasia P. Bazhan
10065 Seven Chess Notes 199 08/2022

(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

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...

32 - P1403684
Petrasin Petrasinovic
10060 Seven Chess Notes 199 08/2022

(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

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...

33 - P1403824
Gustav A. Barth

dedicated to Emanuel Lasker

(9+10) C+
#2
b) s#2

a) 1. Dxb4+! Sxb4 2. Sc3#

b) 1. Db5+! Kxb5 2. Sc3+ Sxc3#
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...

34 - P1404297
E. W. Hearn
514 Los Angeles Times 18/11/1934

(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

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...

35 - P1404474
Jean Lochet
18834 Die Schwalbe 313, p. 446, 02/2022
Horatio Bolton

(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

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...

36 - P1404948
Anirudh Daga
18941 Die Schwalbe 314 04/2022

(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

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...

37 - P1406712
Kurt Keller
12857 feenschach 250, p. 1023, 10-12/2022
Frohe Ostern

(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=
play all

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...

38 - P1406823
Valery Barsukov
12578 feenschach 246 07-09/2021

(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

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...

39 - P1407452
Geoff Foster
PS3832 The Problemist Supplement 179, p. 235, 07/2022

(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

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...

40 - P1407730
Mark Kirtley
The Problemist Supplement 2021

(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

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...

41 - P1408199
Vyacheslav Pilchenko
SuperProbl SuperProblem (Website) 10/03/2023

(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

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...

42 - P1408280
Pietro Pitton
SuperProblem (Website) 15/02/2017
15.-17. Platz
181. Thematurnier

(5+1)
#4
b) wKe4->f1

a) 1. Lh5! Kxh5 2. Kf5 Kh4 3. Lg5+ Kh5 4. g4#

b) 1. h3! Kg3 2. Lg5 Kh2 3. Lf4+ Kh1 4. g4#
play all

Henrik Juel: wK stands on e4 in part a
C+ Popeye 4.61 (2023-03-15)
comment

Keywords: Miniature, Rex solus (s), Twin, Pawn mate, Model mate (in a), Pawn mate (in a), Batteriematt diagonal (in b), discovered checkmate (in b), Corner mate (in b)
Genre: n#
FEN: 8/8/8/8/4K2k/5B2/3B2PP/8
Input: Rainer Staudte, 2023-03-15
Last update: Gunter Jordan, 2023-03-16 more...

43 - P1408768
Niels Danstrup
H4669 The Problemist 29-2, p. 62, 03/2023

(4+3) C+
h#5
b) sBf6->e3

a) 1. Sc4 La3 2. Se5 Lc1 3. Sf3+ Kc4 4. f5 d4 5. Ke4 d3#
b) 1. Kf5 Kc3 2. Ke5 dxe3 3. Sa4+ Kd2 4. Sc5 e4 5. Kd4 Lc3#
play all

Yuri Bilokin: you can see b) 1...Kc3 2.Ke5 dxe3 3.Sa4+ Kd2 4.Sc5 e4 5.Kd4 Bc3# (2024-02-29)
comment

Keywords: Miniature, Twin, Pawn mate (in a), ambush (in a), Selfblock, Ideal mate, Exchange of roles (L-B)
Genre: h#
FEN: 8/8/5p2/8/1B1K1k2/3P4/1n1P4/8
Input: Gunter Jordan, 2023-04-10
Last update: Felber, Volker, 2023-10-14 more...

44 - P1408780
Valery Surkov
ru_chess_art 14/03/2023

(5+2)
s#3
b) Dh7->g7

a) 1. ... Kf8 2. Dg8+ Dxg8#
1. Sd7? droht 2. Sf6+
1. ... Dxh5

1. Sb7? droht 2. Sd6+
1. ... Df7!

1. Se4! droht 2. Sf6+ 2. Sd6+
1. ... Dxh5 2. Sd6+ Kf8 3. Dh6+ Dxh6#
1. ... Df7 2. Sf6+ Kf8 3. Dg7+ Dxg7#

b) 1. De5+! Kf8 2. Sd7+ Kf7 3. De1 Dxh5#
1. ... Kf7 2. De6+ Kf8 3. Dg8+ Dxg8#
play all

Henrik Juel: C+ Popeye 4.61 (the double threat in a) never materializes) (2023-04-11)
comment

Keywords: Aristocrat, Minimal (d), Miniature, Twin
Genre: s#
FEN: 4k2K/7Q/2N3q1/2N4B/8/8/8/8
Input: Rainer Staudte, 2023-04-11
Last update: Gunter Jordan, 2023-04-11 more...

45 - P1408794
Valery Surkov
G45-20 feenschach 247 10-12/2021

(4+2)
s#5
b) sDh3->h4

a) 1. Ta6+? Kc7 2. Dc2+ Dc3 3. Dh7+ Dg7!
1. Tc4+! Kb6 2. Dg6+ De6 3. Db1+ Ka6 4. Tc6+ Dxc6+ 5. Db7+ Dxb7#

b) 1. Tc4+? Kb6! 2. Dg6+ Df6 3. Db1+ Db2!
1. Ta6+! Kc7 2. Dc2+ Dc4 3. Dh7+ Kc8 4. Tc6+ Dxc6+ 5. Db7+ Dxb7#
play all

SCHRECKE: a)+b): C+, Gustav 4.2c, Brute Force (2023-04-12)
comment

Keywords: Minimal (d), Miniature, Twin, Aristocrat
Genre: s#
FEN: K7/8/2k5/3R4/R3Q3/7q/8/8
Input: Rainer Staudte, 2023-04-11
Last update: Gunter Jordan, 2023-04-13 more...

46 - P1408821
Valery Surkov
G45-46 feenschach 247 10-12/2021

(5+2)
s#7
b) -wBd6

a) 1. d7! Ka6 2. b8=S+ Ka5 3. Da7+ La6 4. d8=D+ Kb5 5. Dad7+ Kc5 6. Dg5+ Kb6 7. Db7+ Lxb7#

b) 1. Da7+! La6 2. b8=L! Kb5 3. Dd7+ Kb6,Ka5 4. Dd8+ Kb5,Kc6,Kc5 5. Dd5+ Kb6 6. La7+ Kc7 7. Db7+ Lxb7#
3. ... Kc5 4. Dd5+
play all

SCHRECKE: a)+b): C+, Gustav 4.2c, Brute Force (2023-04-13)
Henrik Juel: C+ Popeye 4.61 also... (2023-04-13)
more ...
comment

Keywords: Minimal (l), Miniature, Twin, Checking key (in b), under-promotion (S, L), Exchange of Promotions, Corner mate, Model mate, Selfblock
Genre: s#
FEN: K7/1P6/3P4/kbQ5/3R4/8/8/8
Input: Rainer Staudte, 2023-04-13
Last update: Gunter Jordan, 2023-04-13 more...

47 - P1408824
Valery Surkov
G45-52 feenschach 247 10-12/2021

(4+2)
s#8
b) sDh1->a1

a) 1. Ta7+! Kb6 2. Dd8+ Kc6 3. Tc7+ Kb6 4. Tc1+ Ka6 5. Dc8+ Kb6 6. Tb1+ Dxb1 7. Db8+ Ka6,Kc6 8. Db7+ Dxb7#

b) 1. Df7+! Kc8 2. Df5+ Kc7 3. Td7+ Kc8 4. Td4+ Kc7 5. Dc2+ Dc3 6. Dh7+ Kc8 7. Tc6+ Dxc6+ 8. Db7+ Dxb7#
play all

SCHRECKE: b) sDh1 nach a1
a)+b): C+, Gustav 4.2c, Brute Force (2023-04-13)
comment

Keywords: Echo, Aristocrat, Minimal (d), Miniature, Checking key, Corner mate, Model mate (Gnaden-), Perpetual check, Twin
Genre: s#
FEN: K3Q3/2k5/R7/3R4/8/8/8/7q
Input: Rainer Staudte, 2023-04-13
Last update: Gunter Jordan, 2023-04-13 more...

48 - P1408869
Joost Michielsen
H1849 Probleemblad 01/23 01-03/2023

(2+8)
h#5
b) sBb2->g3

a) 1. d2 Kb3 2. d3 Ld6+ 3. Kd4 Lxe7 4. De4 Ld8 5. Te5 Lb6#
b) 1. Kc4 Lg1 2. Lc5 Lxd4 3. De3 La1 4. Te4 Kb2 5. Kd4 Kb3#
play all

SCHRECKE: a)+b): C+, Gustav 4.2e, Brute Force (2023-07-24)
comment

Keywords: Minimal (L), Twin, Selfblock, Remote selfblock, Indian (in b), Batteriematt diagonal (in b), discovered checkmate (in b), Königsbatterie (in b), Kniest Theme (in b), Model mate (in a)
Genre: h#
FEN: 4r3/4b3/4q3/2kp4/3p4/3p4/Kp5B/8
Input: Gunter Jordan, 2023-04-14
Last update: Gunter Jordan, 2023-07-24 more...

49 - P1408920
Kevin James Begley
Kostas Prentos
19138 Die Schwalbe 317 2022/10

(16+16)
BP in 12,5

Kontraparraincirce

1. d4 a5 2. Dd3 Ta6 3. Dxh7 Th6[+sBa7] 4. a4 Th3 5. Sa3 Txa3 6. Dh4[+wSa6] bxa6 7. Dxh8[+wSa2] Th3[+sTa8] 8. Dxg8 Th8[+sSg3] 9. Le3 Sxf1 10. Td1[+sLc1] Sxe3 11. Sf3[+wLf1] Sc4 12. Sd2 Sxb2 13. Sb1[+wBd3]
play all

Kevin Begley: Five Siblings (2023-04-17)
comment

Keywords: Unique Proof Game, Circe (Kontraparrain), Impostor (ttLLS)
Genre: Retro, Fairies
FEN: rnbqkbQr/p1ppppp1/p7/p7/P2P4/3P4/NnP1PPPP/1NBRKB1R
Input: Kevin Begley, 2023-04-16
Last update: Kevin Begley, 2023-08-22 more...

50 - P1409022
Valery Surkov
ru_chess_art 24/04/2023

(5+2)
s#4
b) wDc3->b3

a) 1. ... Kxf1 2. Dd3+ Ke1 3. Se3! Kf2 4. Sg2! hxg2#
1. Sf2! Kxf1 2. Dc2! Ke1 3. Sd3+ Kf1 4. Dg2+ hxg2#
1. ... Kxf2 2. Dd3! Ke1 3. Se3! Kf2 4. Sg2! hxg2#

b) 1. Dd5! Kxf1 2. Dd3+ Ke1 3. Sge3! Kf2 4. Sg2! hxg2#
1. ... Ke1 2. Sfe3! Ke2 3. Sc2! Kf1 4. Dg2+ hxg2#
play all

SCHRECKE: a)+b): C+, Gustav 4.2c, Brute Force (2023-04-24)
comment

Keywords: Change of Sacrifices, Minimal (b), Miniature, Rukhlis theme, Twin
Genre: s#
FEN: 8/8/8/8/6N1/2Q4p/4k2P/5N1K
Input: Rainer Staudte, 2023-04-24
Last update: Gunter Jordan, 2023-04-24 more...

51 - P1409081
Valery Surkov
ru_chess_art 28/04/2023

(4+3)
s#3
b) -wLc4

a) 1. La6? Kb3 2. Dc1 a3 3. Db2+ axb2#
1. ... a3!

1. Lb5! a3 2. Te2+ Kb3 3. Tb2+ axb2#
1. ... Kb3 2. Dc1 a3 3. Db2+ axb2#

b) 1. Td4! Kb3 2. Dc1 a3 3. Db2+ axb2#
1. ... a3 2. Dd2+ Kb3 3. Db2+ axb2#
play all

SCHRECKE: a)+b): C+, popeye 4.87 (2023-04-28)
comment

Keywords: Change of Sacrifices (D-T), Striptease, Miniature, Twin
Genre: s#
FEN: 8/8/8/8/p1B1R3/8/p1k5/K3Q3
Input: Rainer Staudte, 2023-04-28
Last update: Gunter Jordan, 2023-04-28 more...

52 - P1409085
Valery Surkov
F2 7ShahMat 03/09/2021

(5+2)
s#3
b) wBe6->d6

a) 1. e7! Dxe8 2. Ld7+ Dxd7 3. Db7+ Dxb7#

b) 1. Da5! Dxe8 2. d7+ Dxd7 3. Lb7+ Dxb7#
play all

SCHRECKE: a)+b): C+, popeye 4.87 (2023-04-28)
comment

Keywords: Change of Sacrifices (LD-BL), Minimal (d), Miniature, Twin
Genre: s#
FEN: K1kqR3/Q7/2B1P3/8/8/8/8/8
Input: Rainer Staudte, 2023-04-28
Last update: Gunter Jordan, 2023-04-28 more...

53 - P1409206
Ivan Bryukhanov
H1576 Problemist Ukrainy 76 04-06/2023

(3+3)
a) h#6
0.1.1...
b) h#5
sTd7

a) 1. ... Sh8-f7 2. Tb1-g1 Ka8-b8 3. Dd7-b5+ Kb8-c7 4. Tg1-g7 Kc7-d6 5. Kh5-g6 Kd6-e6 6. Db5-h5 Sh7-f8#
b) 1. Tg1 Kb8 2. Kh6 Kc8 3. Tg8+ Kxd7 4. Kg7 Sg5 5. Kf8 Se6#
play all

Henrik Juel: C+ Popeye 4.61 also (2023-07-15)
comment

Keywords: Aristocrat, Miniature, Selfblock, Ideal mate, Twin, Stipulation change
Genre: h#
Computer test: Gustav 4.1c
FEN: K6N/3q3N/8/7k/8/8/8/1r6
Input: Marcin Banaszek, 2023-05-01
Last update: Gunter Jordan, 2023-07-15 more...

54 - P1409391
Hans-Dieter Paul
Wochenpost 20 1975

(8+6)
#2
b) sBc4<->wBe6

a) 1. Db7! droht 2. Dg7# 2. f4#
1. ... Ta7,Sc7 2. f4#
1. ... Sxe4+ 2. Dxe4#
1. ... Sd5 2. Dxd5#

b) 1. Td4! droht 2. f4#
1. ... Sxe4+ 2. Txe4#
1. ... Sd5 2. Txd5#
play all

Henrik Juel: double threat in part a) (2023-05-08)
more ...
comment

Keywords: Changed mates, Doppeldrohung (in a), Twin, Pawn mate
Genre: 2#
FEN: n7/8/3RP3/2P1k1K1/2p1P3/r1n1PP2/1Q2p3/8
Input: Rainer Staudte, 2023-05-08
Last update: Gunter Jordan, 2023-05-09 more...

55 - P1409418
Emmanuel Manolas
Facebook 07/05/2023

(4+2)
h#4
b) wSa8->a1
wDU,sDU=Grashüpfer

Henrik Juel: C+ Popeye 4.61 (2023-05-08)
Henrik Juel: solutions
a) 1.Gb2-d4 Sa8-b6 2.Gd4-f4 Sb6-c4 3.Kc3-d4 Sc4-d2 4.Kd4-e5 Sd2-f3 #
b 1.Kc3-d4 Sa1-b3 + 2.Kd4-e5 Sb3-c1 3.Gb2-f6 Gh1-b1 4.Gf6-d4 Sc1-d3 # (2023-05-08)
comment

Keywords: Minimal (g), Miniature, Twin
Pieces:

= Grasshopper (G)
Genre: h#, Fairies
FEN: N7/4K3/8/8/4P3/2k5/1*2q6/7*2Q
Input: A.Buchanan, 2023-05-08
Last update: Gunter Jordan, 2023-05-09 more...

56 - P1409568
Eberhard Schulze
Die Schwalbe 01/06/2011
Lob Informalturnier 2011

(8+6) C+
h#2
b) wKd8->a7

a) 1. Dh1 Sc6+ 2. Kxe4 Dxh1#
b) 1. Lg5 Txc4+ 2. Kxe5 Dxg5#
play all

more ...
comment

Keywords: Schlüssel = Eckzug (in a), Twin
Genre: h#
Computer test: Gustav 4.2
FEN: 2BK4/8/5P2/4N3/2pkN1pQ/1pR1b1P1/8/3q4
Input: Eberhard Schulze, 2023-05-12
Last update: Gunter Jordan, 2023-05-12 more...

57 - P1409570
Eberhard Schulze
feenschach 15/07/2011

(3+8) C+
h#3
b) sKe5->f5

a) 1. Td6 Lh1 2. Se6 Tg2 3. Kd5 Tg5#
b) 1. Sh5 Tg1 2. Tf6 Lg2 3. Lg6 Le4#
play all

more ...
comment

Keywords: Battery creation, Twin
Genre: h#
Computer test: Gustav 4.2
FEN: B5R1/5bn1/1pr4p/4k3/2np4/8/8/K7
Input: Eberhard Schulze, 2023-05-12
Last update: Gunter Jordan, 2023-05-12 more...

58 - P1409573
Eberhard Schulze
Heilbronner Stimme 27/08/2011
Wolf Böhringer gewidmet

(4+5)
h#2
b) wKa6->a2

a) 1. Ke5+ Dd6+ 2. Ke4 Sg3#
b) 1. Ke5+ Dd5+ 2. Kf4 g3#
play all

Abzugs- und Gegenschachs, Matts von g3 aus mit wS und wB

Henrik Juel: C+ Popeye 4.61 also (2023-05-12)
more ...
comment

Keywords: Twin, Königsbatterie, Checking key, Exchange of roles (S-B), Discovered check
Genre: h#
Computer test: Gustav 4.2
FEN: 6b1/8/K3k2r/8/6p1/3Qp3/6P1/7N
Input: Eberhard Schulze, 2023-05-12
Last update: Gunter Jordan, 2023-05-12 more...

59 - P1409574
Eberhard Schulze
Problem-Forum 15/09/2011

(3+8)
H#3
b) 180° (a1=h8)

a) 1. d5 Txd5+ 2. Dd4 Txf5 3. De3 Td5#
b) 1. Dd5 Lxc4 2. e2+ Lxe2 3. Dd6 Lc4#
play all

Da die schwarze Dame ihren König vor Schachgeboten schützen muss, darf sie ihre Blockfelder nicht direkt angehen, obwohl sie das könnte.

Henrik Juel: C+ Popeye 4.61 also (2023-05-12)
comment

Keywords: Switchback, Twin
Genre: h#
Computer test: Gustav 4.2
FEN: 2KR4/7B/3p1p2/5p2/2b2q2/2nk4/4p3/8
Input: Eberhard Schulze, 2023-05-12
Last update: Gunter Jordan, 2023-05-12 more...

60 - P1409576
Eberhard Schulze
15048 Die Schwalbe 252, p. 354, 12/2011

(6+12) C+
h#3
b) +sTd8

a) 1. Dxa8 bxa3 2. Sc5 a4 3. Db7 b5#
b) 1. Dxe6 gxf6 2. Sb5 fxe7 3. Dd6 exd8=S#
play all

more ...
comment

Keywords: Unpinning, Twin, Capture key, under-promotion in mating move (in b), under-promotion (S in b)
Genre: h#
Computer test: Gustav 4.2
FEN: B5q1/1nppp3/1bknRp2/3p2P1/1P2p3/p7/1P6/5K2
Input: Eberhard Schulze, 2023-05-12
Last update: Felber, Volker, 2023-06-23 more...

61 - P1409578
Eberhard Schulze
feenschach 15/01/2012

(4+9)
h#3
b) +sBd5

a) 1. Dxf6+ Ke4 2. Db6 cxb3 3. Sc6 Td5#
b) 1. Dxd4+ Kf5 2. Dc4 Lh4 3. Kd4 Lf2#
play all

Henrik Juel: C+ Popeye 4.61 also (2023-05-12)
Yuri Bilokin: more economical -bPf3 3n4/4p3/5B2/2k1K3/1p1R3q/1pb5/2Pp4/8 (4+8) h#3 b) bPb4-d5
a) 1.Qxf6+ Ke4 2.Qb6 cxb3 3.Sc6 Rd5#
b) 1.Qxd4+ Kf5 2.Qc4 Bh4 3.Kd4 Bf2# (MM)

Exchange of functions (wRd4/wBf6, Captured / Mate)
Zilahi (passive, RB, 2) (2023-05-14)
comment

Keywords: Twin, Checking key, Capture key
Genre: h#
Computer test: Gustav 4.2
FEN: 3n4/4p3/5B2/2k1K3/1p1R3q/1pb2p2/2Pp4/8
Input: Eberhard Schulze, 2023-05-12
Last update: Gunter Jordan, 2023-05-12 more...

62 - P1409605
Reinhardt Fiebig
Eberhard Schulze
Problem-Forum 15/03/2014

(3+8) C+
h#5
0.1.1...
b) sSg7->h4

a) 1. ... a8=S 2. Tf2 Sb6 3. Tf7 exf7+ 4. Kd8 f8=S 5. Se8 Se6#
b) 1. ... a8=L 2. Sg6 Le4 3. Sf8 Lh7 4. Ta8 Lg8 5. Td8 Lf7#
play all

more ...
comment

Keywords: under-promotion (SS,L), under-promotion key, Promotions to Knights (in a), konsekutive Umwandlungen 2 (SS in a), Twin, Model mate, Selfblock
Genre: h#
Computer test: Gustav 4.2
FEN: 4k3/P3p1n1/4P3/8/3p4/6pp/r5p1/6K1
Input: Eberhard Schulze, 2023-05-14
Last update: Gunter Jordan, 2023-06-28 more...

63 - P1410129
Karol Mlynka
SuperProblem (Website) 19/06/2017
9.-10. Platz
190. Thematurnier

(4+3)
#3
b) wTh1->b7

a) 1. Th5! droht 2. Ta5 b3 3. axb3#
1. ... b3 2. axb3 ... 3. Ta5#

b) 1. Ta7! b3 2. axb3 Ka2 3. Txa6#
2. ... a5 3. Txa5#
1. ... a5 2. Txa5 b3 3. axb3#
play all

Henrik Juel: C+ Popeye 4.61 (2023-06-04)
comment

Keywords: Miniature, Twin
Genre: 3#
FEN: 8/8/p7/8/1p6/8/P1P5/k1K4R
Input: Rainer Staudte, 2023-06-04
Last update: Gunter Jordan, 2023-06-04 more...

64 - P1410305
Claus Grupen
Andreas Thoma
2890 Landeszeitung für die Lüneburger Heide 10/06/2023

(2+3)
h#5
b) +sSh2

a) 1. Kc3 Kf3 2. Kd2 Ke4 3. Ke1 Kd3 4. g1=S Kc2 5. Se2 Sd3#
b) 1. Sg3 Ke1 2. Ke3 Kd1 3. Kf2 Kd2 4. Kg1 Ke1 5. Sh1 Se2#
play all

Henrik Juel: C+ Popeye 4.61 (2023-06-12)
comment

Keywords: Miniature (in b), Minimal (S), Twin, under-promotion (s in a), Selfblock, Ideal mate, Round Trip (K-3 in b), Klasinc theme (K-k in b)
Genre: h#
FEN: 8/8/8/8/3k4/8/5Kp1/2N2n2
Input: Gunter Jordan, 2023-06-12
Last update: Gunter Jordan, 2023-08-10 more...

65 - P1410382
Marko Ylijoki
Mirko Degenkolbe
19383 Die Schwalbe 321, p. 147, 06/2023

(2+15)
h#7
0.1.1...
b) sBd5->c4

a) 1. ... dxe8=L 2. Ke7 Lxh5 3. Kf6 Le2 4. Kg6 Lxd3+ 5. Kh5 Lb5 6. Lc4 Kxc2 7. Dg4 Le8#
b) 1. ... dxe8=T+ 2. Kd7 Td8+ 3. Kc6 Txd3 4. Kc5 Td8 5. Dd7 Ke2 6. Kd4 Kf3 7. Kd3 Txd7#
play all

19383 (Marko Ylijoki &Mirko Degenkolbe). a) 1.– d:e8=L 2.Ke7 L:h5 3.Kf6 Le2 4.Kg6 L:d3+ 5.Kh5 Lb5 6.Lc4 K:c2 7.Dg4 Le8# (Mustermatt) b) 1.– d:e8=T+ 2.Kd7 Td8+ 3.Kc6 T:d3 4.Kc5 Td8 5.Dd7 Ke2 6.Kd4 Kf3 7.Kd3 T:d7#. „Rundlauf, Kniest, Koschakin-Thema und Mustermatt in a). Kniest und Maslar mit dem umgewandelten Turm, Bauer(Turm)-Rundlauf von d7 nach d7, Klasinc (weißer Bauer / schwarzer König) in b).“ (Autoren) BK war „verblüfft, dass es keine Nebenlösung mit der weißen Dame“ gab. JB entdeckte das folgende Detail: „In a): Der erwandelte weiße Läufer räumt das Mattfeld für den schwarzen König, die schwarze Dame blockt. In b): Der erwandelte weiße Turm räumt das Mattfeld für den schwarzen König, die schwarze Dame ist Schlagopfer.“ Insgesamt gibt es hier „eine Fülle von strategischen Themen, wie z. B. schwarze Opfer, konsekutiver Umnow, Klasinc, Kniest, Koschakin-Thema, Maslar, Platzwechsel von weißem Turm und schwarzem König, Umwandlung in Turm und Läufer bei Weiß, Rückkehr des weißen Turms, ein Mustermatt. Der hohe Aufwand an schwarzen Steinen hat sich hier gelohnt. Schwierig und schön.“ (KHS) Dazu sehen wir noch einen „Rundlauf des weißen Läufers in a).“ (TZ) „Ein großartiger Hit in Sachen Hilfsmattmehrzüger.“ (JA)

(MD1918)

Autoren:
Kniest, Rundlauf und Mustermatt in a).
Kniest und Maslar in b).
Henrik Juel: C+ Popeye 4.61 (2023-12-30)
comment

Keywords: Minimal (B), under-promotion key, under-promotion (L,T), Checking key (in b), Round Trip (L-6,T/B-5), Rückkehr nach Umwandlung (B/T in b), Kniest Theme, Maslar theme (in b), Koshakin Theme (in a), Model mate (in a), Klasinc theme (B/T-k), Interchange (B/T-k in b), Twin
Genre: h#
FEN: 3kn3/2pP4/4q2b/3p2pp/7p/1bpp4/n1rp4/3K4
Input: Felber, Volker, 2023-06-17
Last update: Gunter Jordan, 2024-01-12 more...

66 - P1410690
Vladimir Kozhakin
Alana T. Utarova
53 Rasswet Sewera 20 04/11/2017
2. Preis

(5+2)
#4
b) wBd5->f5

a) 1. d6 Kb4 2. d7 Kc5 3. d8=D Kb4 4. Da5#
2. ... Ka4 3. d8=D c5 4. Da5#
2. ... c5 3. d8=D Ka4 4. Da5#

b) 1. Tb3! Kd5 2. Kd3 Kc5 3. Lb7 Kd5 4. Tb5#
2. ... c5 3. Lb7#
play all

SCHRECKE: a)+b): C+, Gustav 4.2c, Brute Force (2023-07-04)
comment

Keywords: Minimal (b), Miniature, Twin, Promotion (D in a)
Genre: n#
FEN: 8/8/B1p5/2kP4/2N5/3RK3/8/8
Reprints: Kudesnik 203 11/01/2018
Input: Rainer Staudte, 2023-07-04
Last update: Gunter Jordan, 2023-07-04 more...

67 - P1410691
Sergej Putilow
7071 Kudesnik 203 11/01/2018

(4+2)
#2
b) wSd8->a3

a) 1. Sb7? droht 2. De3#
1. ... Ke6 2. Dd5#
1. ... Ke4!

1. Se6! droht 2. Dd5#
1. ... Ke4 2. De2#

b) 1. Sb5? droht 2. De3#
1. ... Ke6 2. Dd5#
1. ... Ke4!

1. Sc2! Ke4 2. De3#
1. ... Ke6 2. Dd5#
1. ... e6 2. Dd4#
play all

SCHRECKE: a)+b): C+, popeye 4.87 (2023-07-04)
comment

Keywords: Minimal (b), Miniature, Twin
Genre: 2#
FEN: 3N4/4p3/6K1/4k3/2P5/8/3Q4/8
Input: Rainer Staudte, 2023-07-04
Last update: Rainer Staudte, 2023-07-05 more...

68 - P1410708
Vladimir Klipachov
7065 Kudesnik 203 11/01/2018
Lob (Miniaturen)
Grin-100

(5+2)
#2
b) wLc6->g2

a) 1. Da5? Kxf2 2. De1#
1. ... Kf4 2. De5#
1. ... f4!
1. De2? Kf4 2. De5#
1. ... f4!
1. Db2? Kf4 2. De5#
1. ... f4!
1. Db1? Kxf2 2. De1#
1. ... f4 2. Dg1#
1. ... Kf4!
1. Dg8+? Kf4 2. Dg5#
1. ... Kxf2!
1. Sh3? droht 2. Dg2#
1. ... Kg4!
1. Sd3? droht 2. Dg2#
1. ... Kg4!
1. Kg1? f4 2. Dg8#
1. ... Kf4!

1. Da1! Kxf2 2. De1#
1. ... Kf4 2. De5#
1. ... f4 2. Dg1#

b) 1. Da1? Kxf2 2. De1#
1. ... Kf4 2. De5#
1. ... f4!
1. Dg8+? Kf4 2. Dg5#
1. ... Kxf2!

1. De6! Kxf2 2. De1#
1. ... Kf4 2. De5#
1. ... f4 2. Se4#
play all

Henrik Juel: C+ Popeye 4.61 (2023-07-04)
comment

Keywords: Minimal (b), Miniature, Twin
Genre: 2#
FEN: 8/8/2B5/5p2/8/5Nk1/Q4N2/7K
Input: Rainer Staudte, 2023-07-04
Last update: Rainer Staudte, 2023-07-05 more...

69 - P1410711
Carlos Alberto Grassano
7068 Kudesnik 203 11/01/2018
Ehrende Erwähnung (Miniaturen)
Grin-100

(4+3)
#2
b) wLh3->g8

a) * 1. ... Kc8 2. Da8#
1. De5? d5 2. Lxc7#
1. ... Kc8 2. Dxc7#
1. ... d6!

1. Kf6! droht 2. Da8#
1. ... d5 2. De7#

b) 1. Ld5? Kc8 2. De8#
1. ... d6!

1. Lf7! droht 2. De8#
1. ... Kc8 2. Da8#
play all

Henrik Juel: C+ Popeye 4.61 (2023-07-04)
comment

Keywords: Miniature, Twin
Genre: 2#
FEN: 3k4/2pp4/8/B5K1/4Q3/7B/8/8
Input: Rainer Staudte, 2023-07-04
Last update: Felber, Volker, 2023-07-12 more...

70 - P1410823
Alberto Armeni
2431 Gaudium 272 31/12/2022

(3+4)
h#2
b) wLc4->c5
Einsteinschach

a) 1. Lxd7[=sT] Ka2 2. Td1[=sL] Lb3[=wS]#
b) 1. Lg2[=sS] Lxe3[=wT] 2. Se1[=sB] Txe1[=wD]#
play all

Henrik Juel: C+ Popeye 4.61 also (2023-07-08)
comment

Keywords: Einstein Chess, Miniature, Model mate, Capture key (in a), Selfblock (in a), Twin
Genre: Fairies
Computer test: Popeye Windows-64Bit v4.85 (4096 KB)
FEN: 8/3P4/8/8/2B5/K3p2b/2p5/2k5
Input: Gunter Jordan, 2023-07-08
Last update: Gunter Jordan, 2023-07-08 more...

71 - P1410865
Mirko Degenkolbe
10582 Seven Chess Notes 210, p. 23, 07/2023
spezielles Lob
Abt. h#5,5-n
PR Alexej Iwunin

(5+1) C+
h#6
0.2.1...
b) wKf1<->sKc1

a1) 1. ... d4 2. Kd2 d5 3. Ke3 d6 4. Kf4 d7 5. Kg3 d8=D 6. Kh2 Dh4#
a2) 1. ... g4 2. Kxd2 g5 3. Ke3 g6 4. Kf4 g7 5. Kg3 g8=D+ 6. Kh2 Dg2#
b1) 1. ... b4 2. Kxe2 b5 3. Kd3 b6 4. Kc4 b7 5. Kb3 b8=D+ 6. Ka2 Db2#
b2) 1. ... e4 2. Ke2 e5 3. Kd3 e6 4. Kc4 e7 5. Kb3 e8=D 6. Ka2 Da4#
play all

Komplett gleichbleibende schwarze Züge innerhalb der Lösung a) und innerhalb der Lösung b) mit völlig anderen Mattbildern.
Vier verschiedene Excelsiors. Jeder Bauer, der sich auf dem Brett befindet, führt einen Excelsior aus. Zweimal Rückkehr im Mattzug. Zweimal Chamäleonechomatts.
Rex solus. Sechssteiner

(MD1924)
more ...
comment

Keywords: Miniature, Kindergarten Problem, Rex solus (s), Excelsior white, Promotion (D), Chameleon Echo, Rückkehr nach Umwandlung (in a2+b1), Round Trip (B/D in a2+b1), Twin, Symmetrical solution
Genre: h#
Computer test: Popeye WINDOWS98-32Bit-Version 3.77 (8192KB)
FEN: 8/8/8/8/8/8/1P1PP1P1/2k2K2
Input: Felber, Volker, 2023-07-11
Last update: Gunter Jordan, 2024-02-04 more...

72 - P1410960
Vladimir Kozhakin
Diana Utarova
2 Rasswet Sewera 18 22/09/2017
3. Preis

(4+2)
#2
b) wLa4->c2

a) 1. La5? Ke7 2. De5#
1. ... d5 2. Df6#
1. ... d6 2. De4#
1. ... Kd5!
1. Lb5? d5 2. Df6#
1. ... d6 2. De4#
1. ... Kd5!
1. Lc2? d5 2. Lf5#
1. ... d6 2. Df5#
1. ... Kd5!

1. Dd4! droht 2. Lxd7#
1. ... d5 2. Df6#
1. ... d6 2. De4#

b) 1. Le7? droht 2. Dd6# 2. De4#
1. ... Kd5 2. De4#
1. ... d5 2. Dd6#
1. ... d6 2. Dxd6#
1. ... Kxe7!
1. Dg5? d5 2. De7#
1. ... d6 2. Df5#
1. ... Kd6!

1. Le4! droht 2. Df6#
1. ... d5 2. Lf5#
1. ... d6 2. Df5#
play all

SCHRECKE: a)+b): C+, popeye 4.87 (2023-07-18)
comment

Keywords: Minimal (b), Miniature, Twin, Changed mates (2 x 3-fach)
Genre: 2#
FEN: 3B4/3p2K1/4k3/8/B4Q2/8/8/8
Input: Rainer Staudte, 2023-07-18
Last update: Gunter Jordan, 2023-07-18 more...

73 - P1410972
Eduard Nagovitsyn
7094 Kudesnik 204 22/02/2018

(2+5)
#2
b) nach dem Schlüsselzug

a) 1. Df1? e3 2. Dxf3#
1. ... f2 2. Dg2#
Aber b hätte dann keine Lösung.

1. De1? droht 2. Dxe4#
1. ... e3!
1. Dd1? e3 2. Dxf3#
1. ... f2!
Deshalb:

a) 1. Dxf4! e3 2. Dxf3#
1. ... f2 2. Dxe4#
1. ... La7,L~ 2. Dh2#

b) 1. De5? e3!

1. Dg3! e3 2. Dxf3#
1. ... f2 2. Dg2#
1. ... La7,L~ 2. Dg2#
play all

Henrik Juel: for part a) alone Popeye 4.61 finds 1.Df1,Dxf4 (2023-07-18)
comment

Keywords: Minimal (D), Miniature, Corner mate, Twin, Capture key (in a), Changed mates (2-fach)
Genre: 2#
FEN: 8/8/8/8/4pp2/5p1K/8/2Q3bk
Input: Rainer Staudte, 2023-07-18
Last update: Gunter Jordan, 2023-07-18 more...

74 - P1411053
Nikolay Kharchishin
Evgeny Fomichev
C348 SuperProblem (Website) 17/04/2022

(3+3)
#4
b) nach dem Schlüsselzug

a) 1. Kg4! e5 2. Kf5 ... 3. Kf6 ... 4. Dg7#
1. ... f5+,f6 2. gxf6ep Kf7 3. Dg7+ Ke8 4. De7#

b) 1. Kh5! droht 2. g6 ... 3. Dh7+ Kf8 4. Dxf7#
2. ... fxg6+ 3. Kxg6 ... 4. Dg7#
play all

Henrik Juel: C+ Popeye 4.61 (2023-07-22)
comment

Keywords: Provoked check, En passant, Miniature, Twin
Genre: n#
FEN: 6k1/5p2/4p2Q/6P1/8/7K/8/8
Input: Rainer Staudte, 2023-07-22
Last update: Gunter Jordan, 2023-07-22 more...

75 - P1411094
Vidadi Zamanov
Zoltan Labai
11 Zadachi i etyudy 27/06/2023
Spezielles Lob
Juri Suschkow Memorial

(6+1)
#2
b) wSf7->d7

a) * 1. ... Kf6 2. Le5#

1. Sh6+! Kf6 2. Lh4#
1. ... Kxh6 2. Lf4#
1. ... Kh8 2. Le5#
1. ... Kf8 2. Df7#

b) 1. Sf6+! Kxf6 2. Lh4#
1. ... Kh6 2. Lf4#
1. ... Kh8 2. Dh7#
1. ... Kf8 2. Ld6#
play all

SCHRECKE: a)+b): C+, popeye 4.87 (2023-07-24)
comment

Keywords: X flights (DLLL,DLLL), Changed mates, Rex solus (s), Miniature, Twin, Discovered check, Checking key, Sacrifice key, Flight taking (in b)
Genre: 2#
FEN: 8/1Q3Nk1/8/3K3P/6P1/6B1/8/8
Input: Rainer Staudte, 2023-07-24
Last update: Rainer Staudte, 2023-07-24 more...

76 - P1411276
Kabe Moen
SS029 The Hopper Magazine I02 25/06/2022

(10+6) C+
#2
b) sKd3<->wBe3

a) 1. Db8! droht 2. Db3#
1. ... Kxe3 2. Dg3#
1. ... Td6 2. Sc1#

b) 1. Dh8! droht 2. Dh3#
1. ... Kxd3 2. Dc3#
1. ... Sf4 2. Sf1#
play all

more ...
comment

Keywords: Schlüssel = Eckzug (in b), Twin
Genre: 2#
Computer test: a)+b): C+, popeye 4.87
FEN: 3Q4/3RRp2/2p1r3/2pn4/2P3B1/3kP3/1K1NN3/4B3
Input: Rainer Staudte, 2023-07-27
Last update: A.Buchanan, 2023-07-27 more...

77 - P1411412
Valery Surkov
9169 Seven Chess Notes 182 03/2021

(4+1)
#4
b) alle eine Linie nach rechts

a) 1. Td7! Kb5 2. Kb3! Kc5,Ka5 3. Lf2! Kb5 4. Td5#
1. ... Kc5 2. Kb3! Kb5 3. Lf2+ Ka5 4. Td5#

b) 1. Ka3! Kc3 2. Td5! Kc2 3. Se3+ Kc3 4. Td3#
3. ... Kc1,Kb1 4. Td1#
play all

Henrik Juel: C+ Popeye 4.61 (with twi shi a1 b1) (2023-07-30)
comment

Keywords: Stalemate dissolution, Twin, Rex solus (s), Aristocrat
Genre: n#
FEN: 8/8/8/3R4/1Nk5/8/K7/4B3
Input: Rainer Staudte, 2023-07-30
Last update: Gunter Jordan, 2023-07-30 more...

78 - P1411629
Petrasin Petrasinovic
8590 Kudesnik 259 29/07/2023

(6+1)
#2
b)-Bg2 alles eine Linie nach rechts

a) 1. Db3? Ke4 2. Dd3#
1. ... Kg4 2. Dh3#
1. ... Kf6 2. Df7#
1. ... Kxg6!

1. Dh8! Ke4 2. De5#
1. ... Kg4 2. Dh3#
1. ... Kxg6 2. Ld3#
1. ... Ke6 2. De5#

b) 1. Lf2? Kg6 2. Dg7#
1. ... Kf4!

1. Lc7? Kg6 2. Dg7#
1. ... Kh4!

1. Dd4? Kxh6 2. Dg7#
1. ... Kg6 2. Dg7#
1. ... Kh4!

1. Dc3! Kf4 2. De3#
1. ... Kh4 2. Ld8#
1. ... Kxh6 2. Dg7#
1. ... Kg6 2. Dg7#
play all

SCHRECKE: a)+b): C+, popeye 4.87 (2023-08-06)
comment

Keywords: Miniature, Twin, Rex solus (s), Schlüssel = Eckzug (in a), Flight giving sacrifice key, Changed mates
Genre: 2#
FEN: 4K1Q1/8/B5N1/5k2/5P2/8/6P1/8
Input: Rainer Staudte, 2023-08-06
Last update: Gunter Jordan, 2023-08-06 more...

79 - P1411645
Vyacheslav Krasichenok
8592 Kudesnik 259 29/07/2023

(6+1)
#2
b)Kd6->d7

a) 1. ... Kh8 2. Dc3#
1. Sf5+? Kf8,Kg8,Kh8 2. Da8#
1. ... Kf6!

1. Dh5! Kf6 2. De5#
1. ... Kf8 2. Dh8#

b) 1. ... Kh8 2. Dc3#
1. ... Kf8 2. Sh5#

1. Dg2? Kh6 2. Sf5#
1. ... Kh8 2. Db2#
1. ... Kf8 2. g7#
1. ... Kf6!

1. Dg3! Kf6 2. Sh5#
1. ... Kh6 2. Sf5#
1. ... Kh8 2. Dc3#
1. ... Kf8 2. g7#
play all

Henrik Juel: C+ Popeye 4.61 (2023-08-06)
comment

Keywords: Miniature, Twin, Rex solus (s)
Genre: 2#
FEN: 8/4N1k1/3KP1P1/8/5N2/5Q2/8/8
Input: Rainer Staudte, 2023-08-06
Last update: Felber, Volker, 2023-11-12 more...

80 - P1411675
Vladimir P. Shumarin
8599 Kudesnik 259 27/06/2023

(5+2)
#3
b) wKc8->f7

a) 1. Sc3! Kg3 2. Dg6+ Kf2 3. Dg1#
2. ... Kf4 3. Sd5#
2. ... Kh3 3. Dg4#

b) 1. Sf4! Kg3 2. Kxf6 Kf2 3. De1#
2. ... Kxf4 3. De5#
play all

Henrik Juel: C+ Popeye 4.61 (2023-08-09)
comment

Keywords: Minimal (b), Miniature, Twin
Genre: 3#
FEN: 2K1Q3/8/5p2/7B/8/5N2/4Nk2/8
Input: Rainer Staudte, 2023-08-09
Last update: Gunter Jordan, 2023-08-11 more...

81 - P1411858
Ljubomir Ugren
PS3894 The Problemist Supplement 182, p. 271, 01/2023

(2+13)
h#6
b) sLa1->a7

a) 1. Sb3 Kg1 2. Tb1 Kh1 3. Dc1 Kg1 4. e1=S Lxd3+ 5. Kd1 Kf1 6. Sc2 Le2#
b) 1. Lg1 Lxe2 2. Kc3 Lxg4 3. Kd4 Lf3 4. Ke3 Lxa8 5. Ke2 Kxg2 6. Le3 Lf3#
play all

SCHRECKE: a)+b): C+, Gustav 4.2e, Brute Force (2023-08-18)
comment

Keywords: Minimal (L), under-promotion (s in a), Selfblock, black Bristol (in a), Twin, Switchback (K,L), Line opening (in a)
Genre: h#
FEN: b7/8/8/8/6p1/3p2p1/p1kpp1n1/b1nrqB1K
Input: Gunter Jordan, 2023-08-18
Last update: Felber, Volker, 2023-09-30 more...

82 - P1411896
Kostas Prentos
Kevin James Begley
3073 Problemskak 61, p. 17, 01/2023

(16+13) C+
BP in 9,5

Einsteinschach

1.d3 h6 2.Lxh6=T c6 3.Txc6=D Th6=L 4.g3 Lc1=S 5.e3 f6 6.Le2=S Kf7 7.Sxc1=L Kg6 8.Se2=B Kh7 9.0-0[f1=T] Kh8 10.Dh1=T

Cyclic Platzwechsel (Rh1 to f1=B, Lf1 to c1=B, Lc1 to h1=R).
play all

more ...
comment

Keywords: Unique Proof Game, Einstein Chess, Impostor (LLT)
Genre: Retro, Fairies
FEN: rnbq1bnk/pp1pp1p1/5p2/8/8/3PP1P1/PPP1PP1P/RNBQ1BKR
Input: Kevin Begley, 2023-08-22
Last update: Kevin Begley, 2023-08-22 more...

83 - P1412158
Tim Krabbé
Chess Curiosities [Krabbé] 1985

(8+3)
#2
b) After the key move of a)

a) 1. Ke1! Kg2 2. Le4#
b) 0-0! Ke2 2. Lg4#
play all

Henrik Juel: in part a) 1.Kg1 also solves; but then there is no solution in part b) (2023-09-04)
comment

Keywords: Twin
Genre: 2#
FEN: 8/8/8/5B2/2p5/2B2kPp/2P2P1P/5K1R
Reprints: 7 Outrageous Chess Problems 2005
Input: James Malcom, 2023-09-04
Last update: James Malcom, 2023-09-04 more...

84 - P1413288
Bastiaan Evert de Haas
2486 Gaudium 278 30/04/2023

(9+6)
h#2
b) sBc7->e7
wDR=Equihopper

a) 1. Lb2 Ec8 2. c5 bxc6ep#
b) 1. Sg6 Eg8 2. e5 fxe6ep#
play all

Henrik Juel: C+ Popeye 4.61 also (2023-10-31)
comment

Keywords: En passant as mating move, Twin, Model mate
Pieces:

= Equihopper (E)
Genre: Fairies
Computer test: Popeye Windows-64Bit v4.85 (4096 KB)
FEN: 7n/2p5/2*1Q4K/1P3P2/P1kBP3/bpPp4/6P1/8
Input: Gunter Jordan, 2023-10-31
Last update: Gunter Jordan, 2023-10-31 more...

85 - P1413584
György Bakcsi
Laszlo Zoltan
10823 Ideal-Mate Review 78 04-06/2000
Lob
PR Eugene Albert

(2+3)
ser-=7
b) sKa2->a8

a) 1. b7 2. b8=L 3. Lxe5 4. Lxb2 5. Kb4 6. Kc3 7. Kc2=
b) 1. Ka3 2. Kxb2 3. Kc3 4. Kd4 5. Kxe5 6. Kd6 7. Kc7=
play all

Henrik Juel: C+ Popeye 4.61 (2023-11-19)
comment

Keywords: Alleinunterhalter (in b), Corner mate (-patt), Ideal mate, Minimal (B), Seriesmover, Twin, Miniature
Genre: Fairies
FEN: 8/8/1P6/4n3/K7/8/kr6/8
Input: Gunter Jordan, 2023-11-19
Last update: Rainer Staudte, 2023-11-19 more...

86 - P1413728
Arno Tüngler
3590 Die Schwalbe 1981
Vladimir Pachman gewidmet

(4+8) C+
ser-s#12
b) -sBc3

a) 1. Da3 2. Dxb2 3. Dc1 4. Dxf4 5. Dc7 6. f4 7. f5 8. f6 9. f7 10. f8=T 11. Tf1 12. Tc1 b2#
b) 1. De1 2. Dxb1 3. Dc1 4. Dxf4 5. Dc7 6. f4 7. f5 8. f6 9. f7 10. f8=L 11. Lh6 12. Lc1 Tb1#
play all

Arno Tüngler: Angeregt durch P1081215. (2023-11-28)
comment

Keywords: Seriesmover, Twin, under-promotion (T,L), Pawn mate (in a), Excelsior white
Genre: Fairies
FEN: 8/8/k7/8/PQ3p2/1pp5/prp2P2/Kb6
Reprints: My problems [Arno Tüngler] , p. 75, 06/2009
Input: Arno Tüngler, 2023-11-28
Last update: Gunter Jordan, 2023-11-28 more...

87 - P1414507
Udo Degener
Mirko Degenkolbe
Rolf Wiehagen
1208 mpk-Blätter 157 01/2024
Inge Groth gewidmet

(6+6)
h#2
b) sKd5->e5

a) 1. Sf3 Lxf6 2. Sxc5 Td4#
b) 1. Sc3 Lxc6 2. Sxf5 Te4#
play all

(MDxxxx)
Henrik Juel: C+ Popeye 4.61 also (2024-01-15)
comment

Keywords: Model mate, Twin, Line opening, Unpinning, Pinning, Selfblock, pin-mate, Exchange of roles (L-L s-s)
Genre: h#
Computer test: Popeye WINDOWS98-32Bit-Version 3.77 (8192KB)
FEN: 5K2/8/2p2p2/2Pk1P2/1R1nn3/1p6/8/B6B
Input: Felber, Volker, 2024-01-15
Last update: Gunter Jordan, 2024-03-10 more...

88 - P1414550
Yevgenii Gavryliv
Die Schwalbe 2023

(4+8)
h#2
b) wLa6->a7

a) 1. Td8 exd8=T 2. Tb6 Tc8#
b) 1. Sf8 exf8=S 2. Tb7 Se6#
play all

more ...
comment

Keywords: Blockfeldwechsel, Phoenix, Selfblock, under-promotion (T,S), Twin
Genre: h#
FEN: 1rr1n1K1/2kbP2R/B1qp2n1/8/8/8/8/8
Input: Gunter Jordan, 2024-01-17
Last update: Ralf Kr?tschmer, 2024-01-18 more...

89 - P1415679
Sergey Radchenko
11096 Ideal-Mate Review 79 07-09/2000
Lob
PR Eugene Albert

(2+2) C+
h=2
b) a1=a8

a) 1. La7 c7 2. Lb8 cxb8=L=
b) 1. Lb1 f7 2. Lg6 Kxg6=
play all

Henrik Juel: I think that the twinning is more clearly described by something like
Rotate the position 90 degrees clockwise (2024-03-10)
comment

Keywords: Attack number, Corner mate (-patt), Ideal stalemate, Minimal (B/l), Symmetrical end position (in a), under-promotion (l in a), under-promotion in the stalemating move (in a), Twinning by board rotation
Genre: Fairies
FEN: k1K5/8/2P5/8/8/8/8/6b1
Input: Gunter Jordan, 2024-03-10
Last update: Gunter Jordan, 2024-03-10 more...

90 - P1416036
Miroslav Bily
5843 Best Problems 109 01/2024

(2+4) C+
h#6
0.1.1...
b) sBh4->h3

a) 1. ... h3 2. Tg4 Kh7 3. Kg5 Kg7 4. Kh5+ Kf6 5. Te6+ Kf5 6. Th6 hxg4#
b) 1. ... Kh5 2. Tgg3 Kh6 3. Kg4 Kg6 4. Kh4+ Kf5 5. Te5+ Kf4 6. Th5 hxg3#
play all

Yuri Bilokin: you can see a) 1.Rgg3 hxg3 2.Kg4 Kg7 3.Kh5 Kf6 4.Re6+ Kf5 5.Rh6 g4#
b) 1.Rgg3 Kh7 2.Kg4 Kg6 3.Kh4+ Kf5 4.Re5+ Kf4 5.Rh5 hxg3# (2024-03-28)
comment

Keywords: Discovered check, Pawn mate, Chameleon Echo, Ideal mate, Indian, Miniature, Minimal (B), Switchback (K in b), Selfblock, Tempo Loss, Twin
Genre: h#
FEN: 8/6r1/7K/5k2/7p/4r3/7P/8
Input: Gunter Jordan, 2024-03-24
Last update: Gunter Jordan, 2024-03-24 more...

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