35 problem(s) found in 1031 milliseconds (displaying 35 problem(s)).

1 - P1168803
John Nunn
11934 British Chess Magazine 01/1984
2. Preis
P1168803
(4+3)
#3
1. Dc6
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A10-4L+ 3m
vf: a1<>h1, William Braithwaite, 1888, Toronto Sport
comment
Keywords: Miniature Collection (0060498), anticipated (P1127918)
Genre: 3#
Input: Felber, Volker, 2010-9-12
Last update: Rainer Staudte, 2016-1-27 more...
2 - P1188140
John Nunn
PS1645 The Problemist Supplement 03/2005
P1188140
(4+4) C+
h#5
1. f1=D g4 2. Da1 g3 3. De5 Lh1 4. d4 Kg2 5. Ke4 Kf2#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-2-26
Last update: hpr, 2011-2-26 more...
3 - P1188213
John Nunn
H2855 The Problemist 03/2005
4. ehrende Erwähnung
P1188213
(6+7) C+
h#3
2.1...
1) 1. Le5 Td1 2. Dc5 Kd2 3. Kd4 Ke1#
2) 1. Lf4 Lb1 2. De5 Kc2+ 3. Ke4 Kd1#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-2-26
Last update: hpr, 2011-2-26 more...
4 - P1188221
John Nunn
PS1625 The Problemist 03/2005
3. ehrende Erwähnung
P1188221
(4+6) C+
h#5
0.1...
1. ... Th6 2. Ta5 Th2 3. Dxg2+ Ke2 4. Dxf2+ Kd3 5. Dc5 Tb2#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-2-26
Last update: hpr, 2012-9-29 more...
5 - P1188406
John Nunn
PS1729 The Problemist Supplement 11/2005
6. Lob ex aequo
P1188406
(3+8) C+
h#5
1. Lc2 Tg7 2. La4 b3 3. Kc3 Tg2 4. Kb4+ Tb2 5. Ka5 b4#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-2-26
Last update: hpr, 2012-9-29 more...
6 - P1189495
John Nunn
PS1748 The Problemist Supplement 01/2006
4. Lob
P1189495
(3+3) C+
h#6
1. Kc2 Kc4 2. Kd2 Kb3 3. Ke3 Kc2 4. La3 Kd1 5. Lc5 Ke1 6. Ld4 Sd5#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-3-7
Last update: hpr, 2011-3-7 more...
7 - P1189833
John Nunn
British Chess Magazine 2005
P1189833
(2+2) C+
h#6
0.1...
b) wBg2 nach f2
c) wKg8 nach h1
a) 1. ... g4 2. Th3 g5+ 3. Kf5 g6 4. Th6 g7 5. Kg6 Kf8 6. Kh7 g8=D#
b) 1. ... Kf8 2. Tg3 f4 3. Kg6 f5+ 4. Kh7 f6 5. Kh8 f7 6. Tg8+ fxg8=D#
c) 1. ... g4 2. Tf4 g5+ 3. Kf5 g6 4. Kg4 g7 5. Kh3 g8=D 6. Th4 Dg2#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-3-10
Last update: hpr, 2011-3-10 more...
8 - P1190082
John Nunn
PS1767 The Problemist Supplement 03/2006
P1190082
(3+3) C+
h#6
0.1...
1. ... La5 2. Lb4 Kb5 3. Kc3 Ka4 4. Kd4 Kb3 5. Ld6 Kc2 6. Le5 Lb6#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-3-13
Last update: hpr, 2011-3-13 more...
9 - P1190586
John Nunn
H2987 The Problemist 07/2006
3. Preis
P1190586
(5+9) C+
h#3
2.1...
1) 1. Kd4+ Tb7 2. Kc3 Sf3 3. Tc4 Tb3#
2) 1. Kxf5+ Sc6 2. Td4 Tf3+ 3. Kg4 Se5#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-3-20
Last update: hpr, 2011-3-20 more...
10 - P1190671
John Nunn
PS1823 The Problemist Supplement 07/2006
P1190671
(3+3) C+
h#5
1. Kf7 Kc2 2. Dd3+ Kxd3 3. Kg6 Ke4 4. Kh5 Kf5 5. Lh6 Sg3#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-3-21
Last update: hpr, 2011-3-21 more...
11 - P1191048
Michael McDowell
R. Tony Lewis
John Nunn

55 Australian Chess Problem Magazine 09/1993
P1191048
(3+8) C+
h#2
2.1...
1) 1. Lxc6 dxc8=D 2. Kd5 Df5#
2) 1. Dxd7 Dxb7 2. Ke6 De4#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-3-25
Last update: hpr, 2011-3-25 more...
12 - P1191257
John Nunn
PS1893 The Problemist Supplement 03/2007
P1191257
(3+3) C+
h#5
0.2.1...
1) 1. ... Sc6 2. Kc5 Se5 3. Kd4 Sf3+ 4. Ke4 Kf2 5. Ld5 Lb1#
2) 1. ... Lb3 2. Tb4 La4+ 3. Kc4 Kf4 4. Kc5+ Ke5 5. Lc4 Sd7#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-3-26
Last update: hpr, 2011-3-26 more...
13 - P1191265
John Nunn
David Friedgood

PS1936 The Problemist Supplement 07/2007
P1191265
(3+3) C+
h#3
0.1...
b) sBe6 nach c6
a) 1. ... Lh6+ 2. Kc6 Tc5+ 3. Kd6 Lf8#
b) 1. ... Th4 2. d6 Tb4 3. d5 Le7#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-3-26
Last update: hpr, 2011-3-26 more...
14 - P1191698
John Nunn
PS2138 The Problemist Supplement 01/2009
ehrende Erwähnung
P1191698
(3+5) C+
h#4
2.1...
1) 1. Lf2 Kb1 2. Kd3 Ka2 3. Kd2 Kb1 4. Ke1 Kc2#
2) 1. Lc5 Kc1 2. Kb3 Tb1+ 3. Kxa3 Kc2 4. Lb4 Ta1#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-3-30
Last update: hpr, 2012-9-29 more...
15 - P1191970
John Nunn
PS2215v The Problemist Supplement 07/2009
P1191970
(3+3) C+
h#6
0.1...
1. ... Lf8 2. Kf4 e4 3. Ld6 e5 4. Lc7 e6 5. Ke5 e7 6. Kd6 e8=D#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-4-4
Last update: hpr, 2011-4-4 more...
16 - P1192169
John Nunn
H3032 The Problemist 01/2007
P1192169
(6+6) C+
h#3
2.1...
1) 1. Db6 Th2 2. Txd2 Lg7 3. Td5 Tc2#
2) 1. Dc6 Lh6 2. Lxf4 d3 3. Ld6 Le3#
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Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
Input: hpr, 2011-4-10
Last update: hpr, 2011-4-10 more...
17 - P1244177
G. den Broeder
John Nunn

? 1995
P1244177
(3+2)
h#3

Genre: h#
Input: Mu-Tsun Tsai, 2012-7-8
Last update: Mu-Tsun Tsai, 2012-7-8 more...
18 - P1276439
Nicolae Popa
John Nunn

H3620v The Problemist , p. 25, 01/2013
P1276439
(5+5)
h#3
b) sTf1 nach g4
a) 1. Td1 a8=T 2. Td4 Tf8 3. Le3 Sc5#
b) 1. Ld4 c5 2. Kd5 a8=S 3. Te4 Sb6#
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Verbesserung 07/2013, Seite 156 zu P1262446
comment

Genre: h#
Input: Felber, Volker, 2013-8-14
Last update: Felber, Volker, 2013-8-14 more...
19 - P1277290
John Nunn
H3682 The Problemist , p. 209, 09/2013
P1277290
(4+9)
h#3
b) sTe4 nach e3
a) 1. Dxa3 Txg6 2. Df8 La3 3. Df5 Ld6#
b) 1. Txa3 Lg5 2. Tf3 Ta3 3. Tf5 Te3#
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Genre: h#
Input: Felber, Volker, 2013-9-5
Last update: Felber, Volker, 2013-9-5 more...
20 - P1291025
John Nunn
David Friedgood

WCCC Bern 08/2014
Wodka-Turnier
4. ehrende Erwähnung
P1291025
(9+8) C+
s#3
1. Sf5 droht 2. Lc4+ Lxc4 3. Dd3+ Lxd3#
1. ... c4 2. Sfd4+ Dxd4 3. Txb2+ Dxb2#
1. ... Lc4,Ld7 2. Sd4+ Kc3 3. De1+ Txe1#
1. ... Da5 2. Dd3+ Dc3 3. Dc2+ Dxc2#
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Genre: s#
Computer test: Popeye Windows-64Bit v4.55 (5154 MB)
Input: Frank Müller, 2014-11-18
Last update: Frank Müller, 2014-11-18 more...
21 - P1294040
John Nunn
The Problemist 1991
1st prize
TT for problems featuring consecutive corner-to-corner moves
P1294040
(6+10)
#24
1. Lh1 h3 2. La8 h2 3. Lh1 h4 4. La8 h1=D 5. Lxh1 h3 6. La8 h2 7. Lh1 h5 8. La8 h1=D 9. Lxh1 h4 10. La8 h3 11. Lh1 h2 12. La8 h1=D 13. Lxh1 h6 14. La8 h5 15. Lh1 h4 16. La8 h3 17. Lh1 h2 18. La8 Sb7 19. Lxb7 Lg2 20. Lxg2 h1=D 21. Lxh1 Sf3 22. Lb4 Sd2+ 23. Lxd2 e1=D 24. Lc6#
22. ... Sxd4 23. Lc6+ Sxc6 24. b3#
23. b3+ Sxb3 24. Lc6#
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A.Buchanan: Black should sacrifice 4 pawns on h1, but keep the 5th one on h2 as otherwise bSd8 loses its impact. So 18. Ba8! Sb7 19. Bxb7! and Black now sacrifices Bf1 & Ph2 in either order. Now 21. ... Sf3 22. Bb4! is the cleanest line, with a dual only after 22. ... Sxd4 23. b3+,Bc6+. (21. ... Se4 22. Bb4,Bf3,Bg2/h1 etc is more dualized, however.)

It's funny that this problem attracted attention in Matplus just before Valery Liskovets' parity article appeared in Problemas April 2017. The initial position could have Bg2 or Bf3 instead of Ba8, allowing White to choose which corner to occupy, but then White would pick the faster solution, missing the record.

Since White has chosen the "slower option", of allowing the last pawn to promote rather than blocking it on the second rank, Black can get nowhere by h7-h5. The position at 16.0 would be like in the main line, except bPh3 is on h2, so 17. Bh1! gives a short #22. (2017-4-5)
A.Buchanan: Gah wish I could count or wish I could edit typos in PDB: it's 3 & 4th in the first line, of course. (2017-4-5)
A.Buchanan: Just to make clear: with Bg2/Bf3 starting position #23, there may also be more duals following 1. Ba8. But there are some duals anyway in the existing #24. My point was just about the choice of parity meaning the record would be missed. (2017-4-7)
comment

Genre: n#
Reprints: 821 Chess Problems: Tasks and Records , p. 365, 1995
Input: A.Buchanan, 2015-1-5
Last update: Alfred Pfeiffer, 2017-4-6 more...
22 - P1299547
John Nunn
5 The Problemist 25-1, p. 1, 01/2015
Neujahrsgruß
P1299547
(5+4)
#3
1. f8=D? Sxf8 2. Se5
1. ... Sg5!

1. f8=S droht 2. Sg6
1. ... Sxf8 2. Se5 ... 3. Sf3#,Sg6#
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Genre: 3#
Input: Felber, Volker, 2015-3-19
Last update: Felber, Volker, 2015-3-19 more...
23 - P1301022
John Nunn
S2535 The Problemist 03/2015
P1301022
(9+5)
s#8
1. b3 droht 2. Df6+ Ke4 3. Df4+ Kd3 4. Df5+ Kxe2 5. Df1+ Kxf1#
1. ... Ke4 2. Dd4+ Kf3 3. Dg4+ Kf2 4. Dg1+ Kf3 5. Df1+ Ke4 6. Df4+ Kd3 7. Df5+ Kxe2 8. Df1+ Kxf1#
1. ... Ke6 2. De8+ Kd6! 3. Lf4+ Kc5 4. Df8+ Kb6 5. Db8+ Ka5! 6. Lc1 c5 7. Da7+ Kb4 8. Da2 Lxe2#
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Genre: s#
Input: Frank Müller, 2015-4-6
Last update: Frank Müller, 2015-10-25 more...
24 - P1304867
John Nunn
Due Alfieri 1983
P1304867
(3+3)
Remis
1. Kf6? b3 2. Kg7 b2 3. Kxh8 b1=D 4. Kg7 Dg1+ 5. Kf7 Dd4 6. Kg8 Dg4+ 7. Kf7 Df5+ 8. Kg7 Dg5+ 9. Kf7 Dh6 10. Kg8 Dg6+ 11. Kh8 Kc5 12. b6 Df7 13. b7 Df8#

1. Kd4! Kxb5 2. Ke5! b3 3. Kf6 b2 4. Kg7 b1=D 5. Kxh8 remis
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Keywords: Beseitigung hinderlicher Kraft
Genre: Studies
Input: Rainer Staudte, 2015-6-28
Last update: Rainer Staudte, 2017-1-8 more...
25 - P1325995
John Nunn
British Chess Magazine 10/1999
P1325995
(3+2)
Gewinn
1. Kf5? Kf7
1. Ke6? Kf8
1. h4? Kf7
1. Ke4? Kf8

1. Kf4! Kf8 2. Kg4! Kg8 3. Kh5! Kh7 4. Kh4! Kh8 5. Kg3! Kg8 6. Kg4! g6 7. Kf4! Kf7 8. Ke5! Ke7 9. h4
6. ... Kf7 7. Kh5
6. ... Kh7 7. Kf5
5. ... Kh7 6. Kf4 Kg8 7. Kg4!
4. ... Kg6 5. Kg4!
3. ... Kf7 4. h4!
2. ... g6 3. Kf4!
2. Kg3? Kf7 3. Kf4 Ke6
1. ... Kf7 2. Kf5!
1. ... Kh7 2. Kf5
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Keywords: Kindergarten Problem
Genre: Studies
Input: Rainer Staudte, 2016-10-1
Last update: Alfred Pfeiffer, 2016-10-1 more...
26 - P1356240
John Nunn
PS3279 The Problemist Supplement 153, p. 627, 03/2018
P1356240
(5+7) C+
#5
b) sBg6->g5
a) 1. Td4! g5 2. Txb3 Kxb3 3. Lf3 Tc5 4. Ld1+ Tc2 5. Lxc2#
b) 1. Tc4! g4 2. Th5 g3 3. Txb5 axb5 4. Lg2 bxc4 5. Lc6#
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Olaf Jenkner: wLg2 sBg7: #6
Zwar ein sehr schlechter Schlüssel, aber ansonsten eine ordentliche Aufgabe. (2018-10-15)
comment

Genre: n#
Computer test: Popeye WINDOWS98-32Bit-Version 3.77 (8192KB)
Input: Felber, Volker, 2018-10-11
Last update: Felber, Volker, 2018-10-11 more...
27 - P0583192
John Nunn
British Chess Magazine 1995
P0583192
(4+4) C+
h#4
1. Ke5 d3 2. Tb2 La8 3. Tb7 d4+ 4. Ke4 Lxb7#
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Genre: h#
Computer test: (Popeye WINDOWS-32Bit-Version 3.70 (2048 KB))
Reprints: 1494 Ideal-Mate Encyclopedia Vol.1 1999
Input: hpr, 2001-7-16
Last update: hpr, 2010-4-30 more...
28 - P1051869
John Nunn

P1051869
(9+1)
#5

BS Problemid: 36909
Authors: Nunn, John DM
Sources:
Years: 1995
Joaquim Crusats: The wPs on d5 and g6 are superfluous (in terms of problem correctness) (2006-12-16)
Rosalie Fay: 1 Lc7 (thr 2 Lb6#) Kc5 2 e7 (thr 3 e8=D Kb4 4 Db8+ Ka3/Ka4 5 Ta6#; 4 ... Kc5 5 Db6#) Kb4 3 Tb6+ Ka5 4 e8=T ~ 5 Ta8#
C+ Popeye Windows-64Bit v4.69
If wPg6 is removed, the problem is still sound, with the same solution, and the position still looks like an F. (2015-10-1)
comment
Keywords: Brian Stephenson Collection (36909), Letter problem
Genre: n#
Input: Brian Stephenson, 2004-8-12
Last update: A.Buchanan, 2015-1-5 more...
29 - P1053182
John Nunn
? 1995
P1053182
(8+5)
#4

BS Problemid: 38225
Authors: Nunn, John DM
Sources:
Years: 1995
Joaquim Crusats: There are two solutions: Kd7 and d6 (2006-12-3)
comment
Keywords: Brian Stephenson Collection (38225), Letter problem
Genre: n#
Input: Brian Stephenson, 2004-8-12
Last update: A.Buchanan, 2015-1-5 more...
30 - P1053183
John Nunn
? 1995
P1053183
(7+6)
#4

BS Problemid: 38226
Authors: Nunn, John DM
Sources:
Years: 1995
Joaquim Crusats: The wP at a2 is superfluous (in terms of problem correctness) (2006-12-6)
comment
Keywords: Brian Stephenson Collection (38226), Letter problem
Genre: n#
Input: Brian Stephenson, 2004-8-12
Last update: A.Buchanan, 2015-1-5 more...
31 - P1058833
John Nunn

P1058833
(5+5)
#3

BS Problemid: 43896
Authors: Nunn, John
Sources:
Years: 1995
Keywords: Brian Stephenson Collection (43896)
Genre: 3#
Input: Brian Stephenson, 2004-8-12
32 - P1078864
John Nunn
H2875 The Problemist 05/2005
P1078864
(2+6) C+
h#4
b) wTf5
a) 1. Td5+ Ke1 2. Te5 Kd2 3. Ld5 Ke2 4. Dd4 Sd6#
b) 1. Tf3+ Kd2 2. Dg1 Kxc2 3. Ke3 Kc3 4. Df2 Te5#
play all play one stop play next play all

Genre: h#
Computer test: (Popeye Windows-32Bit v4.47 (1200000 KB))
Input: hpr, 2008-10-5
Last update: hpr, 2011-2-26 more...
33 - P1078865
John Nunn
H2923 The Problemist 11/2005
2. ehrende Erwähnung
P1078865
(2+7) C+
h#4*
*) 1. ... Kxe2 2. Kc3 Txf1 3. Kb2 Kd1 4. Ka1 Kc2#
1) 1. e1=S Td1 2. Sf3+ Kc2+ 3. Ke3 Td4 4. Ke2 Te4#
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Genre: h#
Computer test: (Popeye Windows-32Bit v4.47 (1200000 KB))
Input: hpr, 2008-10-5
Last update: hpr, 2012-9-29 more...
34 - P1078866
John Nunn
H3066 The Problemist 05/2007
P1078866
(4+2) C+
h#4
b) sDh1 nach g8
a) 1. Kc3 Lh2 2. Kd4 g3 3. De4 Ke1 4. Ke3 Lg1#
b) 1. Dg4 Kg1 2. Ke3 La5 3. Kf4 e3+ 4. Kg3 Le1#
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Genre: h#
Computer test: (Popeye Windows-32Bit v4.47 (1200000 KB))
Input: hpr, 2008-10-5
Last update: hpr, 2011-3-26 more...
35 - P1086856
John Nunn

V. Kovalenko (version by Kevin Begley, 2009)
P1086856
(3+2) C+
Gewinn
1. Kg5 ...Ld3 (1.Kxg6? ...Kxg8 =; 1.L~? ...Lf7! =; 1...Kxg8 2.Kxg6 +-)
2. Le6! ...Lg6 (2.L~? ...Kh7! =)
3. Ld5 (1) ...Kh7 (3.Kxg6?? stalemate =)
4. Lg8+ ...Kh8 (4...Kxg8 5.Kxg6 +-)
5. Le6! (2) ...Le8 (5.Kxg6? ...Kxg8 =; 5...L~ 6.Kf4 +-)
6. Kf5 +-


(1) Some minor duals here: 3.La2 or 3.Lb3 or 3.Lc4 also suffice, but I do not consider 3.K~ to be a dual, as it only wastes time in what must transpose back to the text.
(2) Returning to the position after black's second move, having achieved only the loss of an important tempo.
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Kevin Begley: Analysis published in Secrets of Minor-Piece Endings, 1995 (white Kb6 Ld8 Bc6, black Ka8 Lb8) -- which quickly leads to a mirror of an incorrect Kovalenko study (which GM Nunn likely was aware of), where a dual solution is noted, but the dual is left unrepaired). (2009-7-14)
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comment

Genre: Studies
Input: Kevin Begley, 2009-6-22
Last update: Rainer Staudte, 2017-1-8 more...
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The problems of this query have been registered by the following contributors:

Felber, Volker (5)
hpr (19)
Mu-Tsun Tsai (1)
Frank Müller (2)
A.Buchanan (1)
Rainer Staudte (2)
Brian Stephenson (4)
Kevin Begley (1)