12 problem(s) found in 2974 milliseconds (displaying 12 problem(s)). [COMMENTDATE>=20220810 AND G='h#' AND NOT A='Schöneberg, Achim' AND S='Sinfonie Scacchistiche'] [download as LaTeX]
a) 1. Sxb4 Sxc3 2. Ka5 Sxc4#
b) 1. cxb3ep Sc4 2. Sb4 Sxc3#
b) 1. cxb3ep Sc4 2. Sb4 Sxc3#
a) 1. f5 Le5 2. 0-0 Th8#
b) 1. Kd8 0-0-0 2. Te8 Lf8#
Try to deduce the diagram error, as we do have the intended solutions!
a) wRh7 is original, but cannot have escaped from cage by white cross-capture as there are too many captures needed. On the other hand, Black only has to make 4 captures so the cross-capture is ok.
b) changing the colour of Sa5 shifts the capture balance: now White can cross-capture but not Black, so White but not Black can castle.
Thus the retro-logic works with the diagram as it is, but the forward logic does not. How can we repair the diagram?
b) 1. Kd8 0-0-0 2. Te8 Lf8#
Try to deduce the diagram error, as we do have the intended solutions!
a) wRh7 is original, but cannot have escaped from cage by white cross-capture as there are too many captures needed. On the other hand, Black only has to make 4 captures so the cross-capture is ok.
b) changing the colour of Sa5 shifts the capture balance: now White can cross-capture but not Black, so White but not Black can castle.
Thus the retro-logic works with the diagram as it is, but the forward logic does not. How can we repair the diagram?
See P0000899 a companion problem.
A.Buchanan: Something odd going on here. There are numerous h#2 in both a&b. PRA not normally found in a problem with single solution for each twin. White has 8 pawns so trivially wRh7 must be original. (2018-10-13)
A.Buchanan: There are three similar problems by Brogi which are all twinned RS rather than PRA, but don't have diagram error. P0003743, P0003746 & P0003747. (2018-10-13)
VL: Nothing to do with Retro Strategy (nor with PRA). One definite castling is legal in every case. (2021-02-09)
Ladislav Packa: Cooked a) and b):
1...b8S and 2...R:h8# (2021-02-10)
A.Buchanan: I think the composer simply forgot that wPb7 can promote. Most of the cooks come from S promotions, but it's also possible to have QR. I've fixed it, rejigging the captures to make them still add up. I've posted in Discord, as I did with the partner composition, and will create entries for them here. (2022-03-15)
milan: +sLb8 sBa7=sT M.Frelih (2023-12-02)
A.Buchanan: Hi Milan - I don't think your suggestion quite works for b). In a) there are 0+2 spare captures, so Black can certainly cross-capture. But in b) there is 1+1 so neither side can cross-capture, so there is no solution. Please compare with P1399806, in which there are 1+2 & 2+1 spare captures, so both twins are sound. (2023-12-03)
milan: Hi Andrew my correction works only with 2.1... solutions, black or white knights on a5. are not important. (2023-12-03)
A.Buchanan: Hi Milan not really clear what you are doing, but if as well as the piece changes you proposed, you also change the stipulation to 2.1... then there is still only one solution. Even if you remove Sa5 entirely as well, there is no White cross-capture possible. (2023-12-04)
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A.Buchanan: Something odd going on here. There are numerous h#2 in both a&b. PRA not normally found in a problem with single solution for each twin. White has 8 pawns so trivially wRh7 must be original. (2018-10-13)
A.Buchanan: There are three similar problems by Brogi which are all twinned RS rather than PRA, but don't have diagram error. P0003743, P0003746 & P0003747. (2018-10-13)
VL: Nothing to do with Retro Strategy (nor with PRA). One definite castling is legal in every case. (2021-02-09)
Ladislav Packa: Cooked a) and b):
1...b8S and 2...R:h8# (2021-02-10)
A.Buchanan: I think the composer simply forgot that wPb7 can promote. Most of the cooks come from S promotions, but it's also possible to have QR. I've fixed it, rejigging the captures to make them still add up. I've posted in Discord, as I did with the partner composition, and will create entries for them here. (2022-03-15)
milan: +sLb8 sBa7=sT M.Frelih (2023-12-02)
A.Buchanan: Hi Milan - I don't think your suggestion quite works for b). In a) there are 0+2 spare captures, so Black can certainly cross-capture. But in b) there is 1+1 so neither side can cross-capture, so there is no solution. Please compare with P1399806, in which there are 1+2 & 2+1 spare captures, so both twins are sound. (2023-12-03)
milan: Hi Andrew my correction works only with 2.1... solutions, black or white knights on a5. are not important. (2023-12-03)
A.Buchanan: Hi Milan not really clear what you are doing, but if as well as the piece changes you proposed, you also change the stipulation to 2.1... then there is still only one solution. Even if you remove Sa5 entirely as well, there is no White cross-capture possible. (2023-12-04)
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Keywords: Castling (wgsk), Cant Castler (wgsk), Cross-capture (s,w), Superseded by (P1399806)
Genre: h#, Retro
Computer test: Popeye v4.87
FEN: 4k2r/pPp2p1R/n1pB1ppp/npP5/1P6/5PPP/2P2P2/R3K3
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-12-03 more...
Genre: h#, Retro
Computer test: Popeye v4.87
FEN: 4k2r/pPp2p1R/n1pB1ppp/npP5/1P6/5PPP/2P2P2/R3K3
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-12-03 more...
*) 1. ... g4#
1) 1. Sxg3 Kxg3 2. g4 Tf5#
1) 1. Sxg3 Kxg3 2. g4 Tf5#
Yuri Bilokin: 1. ... g4#, white rook extra (2023-06-24)
Ladislav Packa: There is one interesting possibility, wRg3 instead of wPg3. The set play is then replaced by the second solution. Zilahi theme, C+ by Popeye v4.63
1.Sh1xg3 Kh3xg3 2.g5-g4 Rf2-f5#
1.Sh1xf2 + Kh3-g2 2.Sf2-g4 Rg3-h3# (2023-06-24)
Yuri Bilokin: Ladislav, in the proposed edition can be seen 1...Rh2 2.Sxg3 Kxg3#. There is a better implementation of the Zilahi theme for this white material P0527728 (2023-06-26)
Ladislav Packa: Zilahi is just one part of the theme, besides it contains multiple tempo play.
1. ...Rh2 (thr. 2.Kg2#) 2.Sxg3 Kxg3#
1.g4+? Rxg4 (thr. 2.Rf5#) but 2.Sxg3, Sxf2+
1.Sxg3 Kxg3 (thr. 2.Rh2#) 2.g4 Rh5#
1.Sxf2+ Kg2 2.Sg4 Rh3# (2023-06-27)
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Ladislav Packa: There is one interesting possibility, wRg3 instead of wPg3. The set play is then replaced by the second solution. Zilahi theme, C+ by Popeye v4.63
1.Sh1xg3 Kh3xg3 2.g5-g4 Rf2-f5#
1.Sh1xf2 + Kh3-g2 2.Sf2-g4 Rg3-h3# (2023-06-24)
Yuri Bilokin: Ladislav, in the proposed edition can be seen 1...Rh2 2.Sxg3 Kxg3#. There is a better implementation of the Zilahi theme for this white material P0527728 (2023-06-26)
Ladislav Packa: Zilahi is just one part of the theme, besides it contains multiple tempo play.
1. ...Rh2 (thr. 2.Kg2#) 2.Sxg3 Kxg3#
1.g4+? Rxg4 (thr. 2.Rf5#) but 2.Sxg3, Sxf2+
1.Sxg3 Kxg3 (thr. 2.Rh2#) 2.g4 Rh5#
1.Sxf2+ Kg2 2.Sg4 Rh3# (2023-06-27)
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Genre: h#
Computer test: (Popeye C-Version 3.52 (2048 KB))
FEN: 7N/8/7p/6pk/8/6PK/5R2/7n
Input: Ralf Krätschmer, 1998-03-30
Last update: Rainer Staudte, 2013-01-05 more...
1) 1. e2 Lc7 2. Le3 Sf6#
2) 1. Le7 Lh2 2. Dg4 Sf4#
NL:
1. e2 Txf7 2. Dg7 Se3#
1. Dg7 Txf7 2. e2 Se3#
2) 1. Le7 Lh2 2. Dg4 Sf4#
NL:
1. e2 Txf7 2. Dg7 Se3#
1. Dg7 Txf7 2. e2 Se3#
Genre: h#
FEN: B4Rq1/5r2/8/K2N2b1/1P3B2/2P1pk2/5p2/8
Input: hpr, 1999-03-11
Last update: hpr, 1999-03-11 more...
1) 1. Sxa2 Txa2 2. g1=S Th2#
2) 1. Sxd5 b4 2. g1=L Lxd5#
3) 1. Lb2 Kxb2 2. g1=T Th8#
NL:
1. Sxa2 Kxa2 2. g1=T Txh8#
2) 1. Sxd5 b4 2. g1=L Lxd5#
3) 1. Lb2 Kxb2 2. g1=T Th8#
NL:
1. Sxa2 Kxa2 2. g1=T Txh8#
Genre: h#
FEN: R6b/8/8/3P4/1n6/1P2p3/B1R3p1/1K5k
Input: Franz Pachl, 1999-03-29
Last update: hpr, 1999-12-19 more...
1) 1. Lg1xh2 Sb5xc3+ 2. Ke4-f3 Tg5-f5#
2) 1. a6xb5 Tg5-e5+ 2. Ke4-d4 Sh2-f3#
3) 1. f6xg5 Sh2-g4 2. Ke4-f5 Sb5-d6#
2) 1. a6xb5 Tg5-e5+ 2. Ke4-d4 Sh2-f3#
3) 1. f6xg5 Sh2-g4 2. Ke4-f5 Sb5-d6#
Genre: h#
Computer test: Popeye 4.83
FEN: 8/8/p4p2/PNpP2RK/2p1k3/2p3P1/2P2PpN/6b1
Input: Marcin Banaszek, 2022-09-08
Last update: Marcin Banaszek, 2022-09-08 more...
1) 1. e7-e5 Lb3-e6 2. b4-b3 Sf7-g5#
2) 1. e7-e6 d6-d7 2. e6-e5 Sf7-d6#
3) 1. e7xf6 Lb3-a4 2. f6-f5 La4-c6#
4) 1. e7xd6 Lb3-c4 2. d6-d5 Lc4-d3#
2) 1. e7-e6 d6-d7 2. e6-e5 Sf7-d6#
3) 1. e7xf6 Lb3-a4 2. f6-f5 La4-c6#
4) 1. e7xd6 Lb3-c4 2. d6-d5 Lc4-d3#
Genre: h#
Computer test: Popeye 4.83
FEN: 8/4pN2/3P1P2/8/1p2k3/1Bp1P3/2P1K3/8
Input: Marcin Banaszek, 2022-11-30
Last update: Marcin Banaszek, 2022-11-30 more...
8 - P1407071
Aleksey Ivunin
366 Sinfonie Scacchistiche 147 01-03/2022
(3+3)
h#2
b) wSe2->d1
c) wSe2<->sKh1
d) wLe2
Aleksey Ivunin
366 Sinfonie Scacchistiche 147 01-03/2022
(3+3)
h#2
b) wSe2->d1
c) wSe2<->sKh1
d) wLe2
a) 1. f2-f1=S Le1-f2 2. Sf1-h2 Se2-g3#
b) 1. f2-f1=T Le1-g3 2. Tf1-g1 Sd1-f2#
c) 1. g2-g1=S Le1-d2 2. Sg1-f3 Sh1-g3#
d1) 1. f2-f1=S Le1-g3 2. g2-g1=L Le2-f3#
d2) 1. g2-g1=L Le1xf2 2. Lg1-h2 Le2-f3#
b) 1. f2-f1=T Le1-g3 2. Tf1-g1 Sd1-f2#
c) 1. g2-g1=S Le1-d2 2. Sg1-f3 Sh1-g3#
d1) 1. f2-f1=S Le1-g3 2. g2-g1=L Le2-f3#
d2) 1. g2-g1=L Le1xf2 2. Lg1-h2 Le2-f3#
Henrik Juel: C+ Popeye 4.61 also (2023-01-04)
Henrik Juel: '2 solutions' should be added to part d), I guess (2023-01-04)
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Henrik Juel: '2 solutions' should be added to part d), I guess (2023-01-04)
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9 - P1407120
Aleksey Ivunin
Aleksandr Pankratiev
401 Sinfonie Scacchistiche 148 04-06/2022
(4+12) C+
h#3
2.1...
Aleksey Ivunin
Aleksandr Pankratiev
401 Sinfonie Scacchistiche 148 04-06/2022
(4+12) C+
h#3
2.1...
1) 1. Te3-e6 d5xe6 2. Lg1-c5 Td7xd2 3. Db6-b5 Lh1-d5#
2) 1. Lg4-e6 d5xe6 2. Kc4-c5 Lh1xb7 3. Th4-c4 Td7-d5#
2) 1. Lg4-e6 d5xe6 2. Kc4-c5 Lh1xb7 3. Th4-c4 Td7-d5#
Yuri Bilokin: more economical -bNg3 1n6/1p1R4/1q6/3P2K1/1pk3br/2p1r3/3p4/6bB (4+11) (2023-01-08)
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Genre: h#
Computer test: Popeye 4.83
FEN: 1n6/1p1R4/1q6/3P2K1/1pk3br/2p1r1n1/3p4/6bB
Input: Marcin Banaszek, 2023-01-06
Last update: Marcin Banaszek, 2023-01-06 more...
1) 1. Lc7-a5 Lg1-h2 2. Kd2-e3 b4-b5 3. La5-d2 Lh2-g1#
2) 1. Th8-h2 Lc4-d5 2. Kd2-d3 g2-g3 3. Th2-d2 Ld5-c4#
2) 1. Th8-h2 Lc4-d5 2. Kd2-d3 g2-g3 3. Th2-d2 Ld5-c4#
Yuri Bilokin: more economical bQh8(-bRh8) -bPg5 2r4q/2b5/4K3/4p3/1PB1ppp1/1P6/1Pnk2P1/6B1 (7+9) (2023-01-08)
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Genre: h#
Computer test: Popeye 4.83
FEN: 2r4r/2b5/4K3/4p1p1/1PB1ppp1/1P6/1Pnk2P1/6B1
Input: Marcin Banaszek, 2023-01-06
Last update: Marcin Banaszek, 2023-01-06 more...
11 - P1407126
Anatoly Kirichenko
Aleksandr Pankratiev
407 Sinfonie Scacchistiche 148 04-06/2022
(2+6) C+
h#4
0.2.1...
Anatoly Kirichenko
Aleksandr Pankratiev
407 Sinfonie Scacchistiche 148 04-06/2022
(2+6) C+
h#4
0.2.1...
1) 1. ... La1-c3 2. Lh1-e4 Lc3-e1 3. Le5-c3 Ke7-e6 4. Kc5-d4 Le1-f2#
2) 1. ... La1-b2 2. Le5-c3 Lb2-a3+ 3. Kc5-d4 Ke7-d6 4. Lh1-e4 La3-c5#
2) 1. ... La1-b2 2. Le5-c3 Lb2-a3+ 3. Kc5-d4 Ke7-d6 4. Lh1-e4 La3-c5#
Yuri Bilokin: more economical bRd3(-bPd3), -bPa7 8/4K3/8/2k1b3/2p5/3r4/8/B6b (2+5) h#4 0.2…
1...Bb2 2.Bc3 Ba3+ 3.Kd4 Kd6 4.Be4 Bc5#
1...Bc3 2.Be4 Ba5 3.Bc3 Ke6 4.Kd4 Bb6# (2023-01-08)
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1...Bb2 2.Bc3 Ba3+ 3.Kd4 Kd6 4.Be4 Bc5#
1...Bc3 2.Be4 Ba5 3.Bc3 Ke6 4.Kd4 Bb6# (2023-01-08)
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Genre: h#
Computer test: Popeye 4.83
FEN: 8/p3K3/8/2k1b3/2p5/3p4/8/B6b
Input: Marcin Banaszek, 2023-01-06
Last update: Marcin Banaszek, 2023-01-06 more...
1) 1. ... Da7-h7 2. Tf5-f3 Dh7xe4+ 3. Kd3xe4 Sa4xc5#
2) 1. ... Da7-c7 2. Sc5-b3 Dc7xc4+ 3. Kd3xc4 Sa4-b2#
2) 1. ... Da7-c7 2. Sc5-b3 Dc7xc4+ 3. Kd3xc4 Sa4-b2#
Yuri Bilokin: more economical wKh1-b6(-wPb6), wQa7-e8, -wPb4, bPb5-d7, -bPa6, +bQg5, +bBh6 (7+10) h#3 0.2.111
1...Qg6 2.Rf3 Qxe4+ 3.Kxe4 Sxc5#
1...Qc8 2.Sb3 Qxc4+ 3.Kxc4 Sb2#
Active sacrifice (white) × 2
Ambush (wQ) × 2
Analogy (complete)
Kniest theme × 2
Model mate × 2 (2023-01-08)
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1...Qg6 2.Rf3 Qxe4+ 3.Kxe4 Sxc5#
1...Qc8 2.Sb3 Qxc4+ 3.Kxc4 Sb2#
Active sacrifice (white) × 2
Ambush (wQ) × 2
Analogy (complete)
Kniest theme × 2
Model mate × 2 (2023-01-08)
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Genre: h#
Computer test: Popeye 4.83
FEN: 8/Q7/pP6/1pnbrr2/NPp1p1P1/2Pk2P1/3P4/7K
Input: Marcin Banaszek, 2023-01-06
Last update: Marcin Banaszek, 2023-01-06 more...
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The problems of this query have been registered by the following contributors:
Gerd Wilts (2)Ralf Krätschmer (1)
hpr (1)
Franz Pachl (1)
Marcin Banaszek (7)
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