White to move and force mate in 81

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towforce
Posts: 12672
Joined: Thu Mar 09, 2006 12:57 am
Location: Birmingham UK
Full name: Graham Laight

Re: White to move and force mate in 81

Post by towforce »

towforce wrote: ↑Thu Jul 06, 2023 7:04 pmHas anyone come up with a way to give computers something like... curiosity?

Curiosity is the beginning of knowledge.

Apparently, it does exist - link!
Human chess is partly about tactics and strategy, but mostly about memory
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Chessqueen
Posts: 5685
Joined: Wed Sep 05, 2018 2:16 am
Location: Moving
Full name: Jorge Picado

Re: White to move and force mate in 81

Post by Chessqueen »

acase wrote: ↑Wed Jul 05, 2023 11:00 pm
Chessqueen wrote: ↑Wed Jul 05, 2023 4:51 am
Try to solve this puzzle[/size]

K7/p3p1p1/1p2p1p1/rp4B1/brpn4/Rnk5/8/4N1N1 w

Actually Gustav CAN solve this mate, see here:

https://www.chessprogramming.org/Gustav#Longest_Problem
How come nobody from this forum has posted the solution with Gustav of Checkmate in 163 moves instead of 167 moves as suggested by the site ==>https://www.chessprogramming.org/Gustav#Longest_Problem

FEN: K7/p3p1p1/1p2p1p1/rp4B1/brpn4/Rnk5/8/4N1N1 w - - 0 1

[pgn][Event "solve it w/o EGTB"]
[Date "2023.07.06"]
[Round "?"]
[White "Huntsman"]
[Black "Crystal 6 PMT-avx2 [001]"]
[Result "*"]
[BlackElo "3550"]
[Time "16:42:48"]
[WhiteElo "3530"]
[TimeControl "0+20"]
[SetUp "1"]
[FEN "K7/p3p1p1/1p2p1p1/rp4B1/brpn4/Rnk5/8/4N1N1 w - - 0 1"]
[Termination "unterminated"]
[PlyCount "2"]
[WhiteType "program"]
[BlackType "program"][/pgn]
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Ignacio
Posts: 178
Joined: Wed Mar 08, 2006 8:15 pm

Re: White to move and force mate in 81

Post by Ignacio »

My record for Gustav is mate in 170 moves in 5 min 42 sec.


[fen]rBbK4/P2p4/P2Pp3/1B1p1p1p/2prnp2/1Rnk4/1b1p4/3B1N1N w - - 0 1 [/fen]
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Hobacle
Posts: 244
Joined: Thu Mar 04, 2021 3:57 pm
Full name: Nott Q Suree

Re: White to move and force mate in 81

Post by Hobacle »

Ignacio wrote: ↑Fri Jul 07, 2023 8:49 am [fen]rBbK4/P2p4/P2Pp3/1B1p1p1p/2prnp2/1Rnk4/1b1p4/3B1N1N w - - 0 1 [/fen]
The position is still illegal because the white pawns on e file and h file cannot be captured by black pawns.
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acase
Posts: 998
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: White to move and force mate in 81

Post by acase »

Chessqueen wrote: ↑Thu Jul 06, 2023 11:45 pm
acase wrote: ↑Wed Jul 05, 2023 11:00 pm
Chessqueen wrote: ↑Wed Jul 05, 2023 4:51 am
Try to solve this puzzle[/size]

K7/p3p1p1/1p2p1p1/rp4B1/brpn4/Rnk5/8/4N1N1 w

Actually Gustav CAN solve this mate, see here:

https://www.chessprogramming.org/Gustav#Longest_Problem
How come nobody from this forum has posted the solution with Gustav of Checkmate in 163 moves instead of 167 moves as suggested by the site ==>https://www.chessprogramming.org/Gustav#Longest_Problem

FEN: K7/p3p1p1/1p2p1p1/rp4B1/brpn4/Rnk5/8/4N1N1 w - - 0 1

[pgn][Event "solve it w/o EGTB"]
[Date "2023.07.06"]
[Round "?"]
[White "Huntsman"]
[Black "Crystal 6 PMT-avx2 [001]"]
[Result "*"]
[BlackElo "3550"]
[Time "16:42:48"]
[WhiteElo "3530"]
[TimeControl "0+20"]
[SetUp "1"]
[FEN "K7/p3p1p1/1p2p1p1/rp4B1/brpn4/Rnk5/8/4N1N1 w - - 0 1"]
[Termination "unterminated"]
[PlyCount "2"]
[WhiteType "program"]
[BlackType "program"][/pgn]
Perhaps it's a misprint or something, or maybe Gustav found a shorter mate.
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Chessqueen
Posts: 5685
Joined: Wed Sep 05, 2018 2:16 am
Location: Moving
Full name: Jorge Picado

Re: White to move and force mate in 81

Post by Chessqueen »

acase wrote: ↑Fri Jul 07, 2023 1:42 pm
Chessqueen wrote: ↑Thu Jul 06, 2023 11:45 pm
acase wrote: ↑Wed Jul 05, 2023 11:00 pm
Chessqueen wrote: ↑Wed Jul 05, 2023 4:51 am
Try to solve this puzzle[/size]

K7/p3p1p1/1p2p1p1/rp4B1/brpn4/Rnk5/8/4N1N1 w

Actually Gustav CAN solve this mate, see here:

https://www.chessprogramming.org/Gustav#Longest_Problem
How come nobody from this forum has posted the solution with Gustav of Checkmate in 163 moves instead of 167 moves as suggested by the site ==>https://www.chessprogramming.org/Gustav#Longest_Problem

FEN: K7/p3p1p1/1p2p1p1/rp4B1/brpn4/Rnk5/8/4N1N1 w - - 0 1

[pgn][Event "solve it w/o EGTB"]
[Date "2023.07.06"]
[Round "?"]
[White "Huntsman"]
[Black "Crystal 6 PMT-avx2 [001]"]
[Result "*"]
[BlackElo "3550"]
[Time "16:42:48"]
[WhiteElo "3530"]
[TimeControl "0+20"]
[SetUp "1"]
[FEN "K7/p3p1p1/1p2p1p1/rp4B1/brpn4/Rnk5/8/4N1N1 w - - 0 1"]
[Termination "unterminated"]
[PlyCount "2"]
[WhiteType "program"]
[BlackType "program"][/pgn]
Perhaps it's a misprint or something, or maybe Gustav found a shorter mate.
It is NOT a misprint, but it could be a mistyped, when they tried to type 167 moves and they wrote 163 moves, because that particular puzzle is famous and it has been around since 1890 WAO :roll:
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Chessqueen
Posts: 5685
Joined: Wed Sep 05, 2018 2:16 am
Location: Moving
Full name: Jorge Picado

Re: White to play and force a Draw

Post by Chessqueen »

Crystal and huntman find this draw immediately, but for some top engine it is too tough or hard to find in less than 1 minute

FEN: 8/8/4N3/4Q3/1pp5/1p3N2/bpqp1p2/nrkrbK2 w - - 0 1

Berserk-11.1-x64-avx2:
time -1 start 69728031 alloc 20000 max 2147483647 depth 250 timeset 0 searchmoves 0
1/1 00:00 180 180k -39.39 Kf1-g2
2/2 00:00 1k 1,370k -39.09 Kf1-g2 f2-f1Q+
3/3 00:00 2k 2,226k -39.29 Kf1-g2 f2-f1Q+ Kg2xf1
4/4 00:00 3k 3,436k -39.29 Kf1-g2 f2-f1Q+ Kg2xf1 c4-c3
5/5 00:00 6k 6,222k -39.29 Kf1-g2 f2-f1Q+ Kg2xf1 c4-c3 Nf3xe1
6/10 00:00 8k 8,371k -34.96 Kf1-g2 f2-f1Q+
7/9 00:00 12k 12,421k -32.39 Ne6-d4 Qc2-d3+
8/11 00:00 14k 13,945k -31.95 Ne6-d4
9/13 00:00 16k 16,029k -26.84 Ne6-d4
10/15 00:00 25k 24,892k -28.63 Ne6-d4 Qc2-d3+ Nd4-e2+ Qd3xe2+ Qe5xe2 Na1-c2 Qe2xc4 Rb1-a1 Kf1-e2
11/19 00:00 30k 29,639k -28.25 Ne6-d4 Qc2-d3+ Nd4-e2+ Qd3xe2+ Qe5xe2 Na1-c2 Qe2xc4 Rb1-a1
12/12 00:00 35k 34,879k -26.87 Ne6-d4 Qc2-d3+ Nd4-e2+
13/20 00:00 57k 57,195k -29.28 Ne6-d4 Qc2-d3+ Nd4-e2+ Qd3xe2+ Qe5xe2 Na1-c2 Qe2xc4 Rb1-a1 Kf1-g2 b2-b1Q Kg2-h1 Kc1-b2 Nf3-e5 f2-f1Q+ Qc4xf1
14/23 00:00 91k 6,078k -31.47 Ne6-d4 Qc2-d3+ Nd4-e2+ Qd3xe2+ Qe5xe2 Na1-c2 Nf3xd2 Rd1xd2 Qe2xc4 Rb1-a1 Qc4-c5 b2-b1Q
15/24 00:00 116k 7,743k -29.08 Nf3-d4 Qc2-d3+ Nd4-e2+ Qd3xe2+ Qe5xe2 Na1-c2 Qe2xc4
16/22 00:00 305k 6,493k -29.04 Ne6-d4 Qc2-d3+ Nd4-e2+ Qd3xe2+ Qe5xe2 Na1-c2 Qe2xc4 Rb1-a1 Qc4-e4 b2-b1Q Nf3-e5 Qb1-b2 Ne5-d3+ Kc1-b1 Nd3xb2
17/29 00:00 470k 6,029k -27.18 Ne6-d4 Qc2-d3+ Nd4-e2+ Qd3xe2+ Qe5xe2 Na1-c2 Nf3-e5 Rb1-a1 Ne5xc4 b2-b1Q Nc4-e5 Qb1-b2 Ne5-d3+ Kc1-b1 Nd3xb2 Kb1xb2 Qe2-e5+ Kb2-b1 Kf1-g2
18/29 00:00 649k 5,956k -28.23 Ne6-d4 Qc2-d3+ Nd4-e2+ Qd3xe2+ Qe5xe2 Na1-c2 Qe2xc4 Rb1-a1 Qc4-f4 b2-b1N Nf3-e5 Nb1-c3 Ne5-d3+ Kc1-b1 Nd3xf2 Rd1-c1 Kf1-g2 b3-b2 Kg2-h2 Be1xf2 Qf4xd2
19/34 00:00 2,496k 6,657k -32.78 Ne6-d4 Qc2-d3+ Nd4-e2+ Qd3xe2+ Qe5xe2 Na1-c2 Qe2xc4 Rb1-a1 Qc4-f4 b2-b1Q Nf3-e5 Qb1-b2 Ne5-d3+ Kc1-b1 Nd3xb2 Kb1xb2 Qf4-e5+ Kb2-b1 Qe5-b8 Nc2-e3+ Kf1-e2 Rd1-c1 Ke2xe3 d2-d1Q
20/34 00:00 3,445k 6,690k -32.34 Nf3-d4 Qc2-d3+ Nd4-e2+ Qd3xe2+ Qe5xe2 Na1-c2 Qe2xc4 Rb1-a1 Qc4-e2 b2-b1Q Ne6-f4 Nc2-a3 Kf1-g2 f2-f1Q+ Qe2xf1 Qb1-e4+ Qf1-f3 Qe4xf3+ Kg2xf3 Kc1-b2
21/27 00:00 3,728k 6,633k -25.90 Ne6-f4 Qc2-c3 Nf4-e2+ Kc1-c2 Nf3-d4+ Qc3xd4 Ne2xd4+ Kc2-c1 Nd4-e2+
22/22 00:00 3,827k 6,620k -21.30 Ne6-f4 Qc2-d3+ Nf4xd3+ c4xd3 Qe5-e4 Na1-c2 Nf3-e5 Rb1-a1 Ne5xd3+
23/17 00:00 3,848k 6,477k -19.23 Ne6-f4 Qc2-d3+ Nf4xd3+ c4xd3 Qe5-e4 Na1-c2 Nf3-e5 Rb1-a1 Ne5xd3+ Kc1-b1 Qe4-e5 Nc2-e3+ Qe5xe3 Rd1-c1 Qe3-e5 Rc1-c3 Qe5-e2
24/27 00:00 3,868k 6,512k -16.58 Ne6-f4 Qc2-d3+ Nf4xd3+ c4xd3 Qe5-e4 Na1-c2 Nf3-e5 Rb1-a1 Ne5xd3+ Kc1-b1 Qe4-e5 Nc2-e3+ Qe5xe3 Rd1-c1 Qe3-d4 d2-d1N Nd3xb4 Be1xb4 Qd4xb4 Kb1-c2
25/41 00:00 5,036k 6,448k -21.92 Ne6-f4 Qc2-d3+ Nf4xd3+ c4xd3 Qe5-e4 Na1-c2 Nf3-e5 Rb1-a1 Ne5xd3+ Kc1-b1 Qe4-e5 Nc2-e3+ Qe5xe3 Rd1-c1 Qe3-e5 d2-d1N Kf1-e2 Rc1-c2+ Ke2-f1 Be1-d2 Qe5-e4 Bd2-c1 Nd3xf2 Nd1xf2 Qe4xb4 Bc1-e3 Qb4-e7 Nf2-d1 Qe7-d6 Rc2-f2+ Kf1-e1 Nd1-c3 Qd6-d3+ Rf2-c2 Ke1-f1 Be3-b6 Kf1-e1 Bb6-a5
26/43 00:02 14,461k 6,758k -22.88 Ne6-f4 Qc2-d3+ Nf4xd3+ c4xd3 Qe5-c5+ Na1-c2 Nf3-e5 Rb1-a1 Ne5xd3+ Kc1-b1 Qc5-e5 Nc2-e3+ Qe5xe3 Rd1-c1 Qe3-e5 d2-d1N Kf1-e2 Rc1-c2+ Ke2-f1 Be1-d2 Qe5-e4 Bd2-c1 Nd3xf2 Nd1xf2 Qe4-e1 Nf2-d3 Qe1-d1 Nd3-c5 Kf1-g1 Rc2-d2 Qd1-f1 Nc5-e4 Qf1-f3 Ne4-c3 Qf3-f5+ Rd2-c2 Qf5-d3 Bc1-f4 Kg1-h1 Bf4-d2
27/47- 00:02 17,223k 6,848k -25.42 Ne6-f4 Qc2-d3+
27/47- 00:02 18,309k 6,852k -26.16 Ne6-f4 Qc2-d3+
27/47- 00:06 41,820k 6,793k -29.68 Ne6-f4 Qc2-d3+
27/47+ 00:06 44,795k 6,778k -28.47 Ne6-f4
27/47- 00:08 55,328k 6,770k -31.48 Ne6-f4 Qc2-d3+
27/47+ 00:08 60,594k 6,756k -28.85 Ne6-f4
27/47 00:09 62,594k 6,756k -29.34 Ne6-f4 Qc2-d3+ Nf4xd3+ c4xd3 Qe5-g5 Na1-c2 Nf3-e5 Rb1-a1 Ne5xd3+ Kc1-b1 Qg5-e5 Nc2-e3+ Qe5xe3 Rd1-c1 Qe3-e5 d2-d1N Kf1-e2 Rc1-c2+ Ke2-f1 Be1-d2 Qe5-e4 Bd2-c1 Nd3xf2 Nd1xf2 Qe4xb4 Bc1-e3 Qb4-b5 Kb1-c1 Kf1-g2 b2-b1Q Kg2-f3 Qb1-b2 Qb5-f1+ Nf2-d1 Kf3-g4 Qb2-d4+ Kg4-h5 b3-b2 Kh5-g6 b2-b1R
28/46- 00:09 63,955k 6,754k -29.40 Ne6-f4 Qc2-d3+
28/46- 00:09 64,346k 6,751k -29.46 Ne6-f4 Qc2-d3+
28/47- 00:14 95,761k 6,757k -33.93 Ne6-f4 Qc2-d3+
28/47 00:16 109,846k 6,734k -34.38 Ne6-f4 Qc2-d3+ Nf4xd3+ c4xd3 Nf3-d4 Na1-c2 Nd4-e6 Rb1-a1 Ne6-f4 Kc1-b1 Nf4xd3 Nc2-e3+ Qe5xe3 Rd1-c1 Qe3-d4 d2-d1N Kf1-e2 Rc1-c2+ Ke2-f1 Rc2-c4 Qd4-e5 Rc4-c1 Kf1-e2 Rc1-c2+ Ke2-f1 Be1-d2 Qe5-e6 Bd2-c1 Nd3xf2 Nd1xf2 Qe6-a6 Bc1-f4 Kf1-g2 Nf2-d3+ Kg2-f3 Rc2-c3 Kf3-g4 Bf4-d2 Kg4-f5 Kb1-c2
29/44- 00:16 113,483k 6,750k -34.44 Ne6-f4 Qc2-d3+
29/44- 00:17 115,257k 6,743k -34.50 Ne6-f4 Qc2-d3+
29/46- 00:21 148,101k 6,756k -35.85 Ne6-f4 Qc2-d3+
29/46+ 00:24 164,357k 6,769k -35.58 Ne6-f4
29/46+ 00:24 164,387k 6,766k -35.11 Ne6-f4
29/46- 00:27 188,134k 6,780k -36.23 Ne6-f4 Qc2-d3+
29/46- 00:46 316,362k 6,738k -39.06 Ne6-f4 Qc2-d3+
29/48+ 00:52 353,321k 6,730k -38.04 Ne6-f4
29/48 00:55 369,840k 6,723k -39.97 Ne6-f4 Qc2-d3+ Nf4xd3+ c4xd3 Qe5-e4 Na1-c2 Nf3-e5 Rb1-a1 Qe4-f3 Nc2-e3+ Qf3xe3 b2-b1Q Qe3-c5+ Qb1-c2 Qc5xb4 b3-b2 Qb4-a3 Ba2-b3 Qa3-d6 b2-b1Q Ne5-g4 Bb3-c4 Qd6-c5 Qb1-b5 Qc5xb5 Bc4xb5 Ng4-e3 Ra1-a4 Kf1-g2 Qc2-c4 Kg2-f1 Qc4-c3 Ne3-d5 Qc3-e5 Nd5-b6
30/30+ 00:55 369,922k 6,722k -39.91 Ne6-f4
30/30- 00:55 374,881k 6,717k -40.03 Ne6-f4 Qc2-d3+
30/30- 00:56 377,177k 6,715k -40.11 Ne6-f4 Qc2-d3+
30/32+ 00:56 377,413k 6,715k -40.02 Ne6-f4
30/32- 00:56 379,090k 6,713k -40.20 Ne6-f4 Qc2-d3+
30/32- 00:59 399,904k 6,709k -40.50 Ne6-f4 Qc2-d3+
30/52+ 01:01 409,711k 6,710k -40.34 Ne6-f4
30/52+ 01:04 429,968k 6,702k -36.65 Ne6-f4
30/52 01:04 433,755k 6,699k -40.62 Ne6-f4 Qc2-d3+ Nf4xd3+ c4xd3 Qe5-g3 Na1-c2 Nf3-e5 Rb1-a1 Ne5xd3+ Kc1-b1 Qg3-e5 Nc2-e3+ Qe5xe3 Rd1-c1 Qe3-e5 d2-d1N Kf1-e2 Rc1-c2+ Ke2-f1 Be1-d2 Qe5-e4 Bd2-c1 Nd3xf2 Nd1xf2 Qe4-d4 Bc1-f4 Qd4-d8 Bf4-e3 Kf1-g2 Kb1-c1 Qd8-e7 b2-b1Q Qe7xe3+ Rc2-d2
31/47+ 01:05 440,059k 6,696k -40.56 Ne6-f4
31/47+ 01:05 440,101k 6,697k -40.50 Ne6-f4
31/47- 01:07 449,823k 6,698k -40.68 Ne6-f4 Qc2-d3+
31/52+ 01:07 455,907k 6,708k -40.55 Ne6-f4
31/52- 01:11 477,271k 6,716k -40.77 Ne6-f4 Qc2-d3+
31/52+ 01:11 477,346k 6,716k -40.61 Ne6-f4
31/52+ 01:11 479,069k 6,718k -40.44 Ne6-f4
31/52 01:11 480,400k 6,719k -40.83 Ne6-f4 Qc2-d3+ Nf4xd3+ c4xd3 Nf3-g5 Na1-c2 Ng5-e6 Rb1-a1 Ne6-f4 Kc1-b1 Nf4xd3 Nc2-e3+ Qe5xe3 Rd1-c1 Qe3-e5 d2-d1N Kf1-e2 Rc1-c2+ Ke2-f1 Be1-d2 Qe5-e6 Bd2-c1 Nd3xf2 Nd1xf2 Qe6-a6 Bc1-e3 Kf1-g2 Nf2-d3+ Kg2-g3 Rc2-c3 Qa6-e6 Be3-c1 Kg3-g4 Bc1-d2 Kg4-f5 Kb1-c2 Kf5-f6 b2-b1Q
32/42+ 01:11 480,445k 6,718k -40.77 Ne6-f4
32/42 01:11 482,809k 6,719k -40.77 Ne6-f4 Qc2-d3+ Nf4xd3+ c4xd3 Nf3-g5 Na1-c2 Ng5-e6 Rb1-a1 Ne6-f4 Kc1-b1 Nf4xd3 Nc2-e3+ Qe5xe3 Rd1-c1 Qe3-e5 d2-d1N Kf1-e2 Rc1-c2+ Ke2-f1 Be1-d2 Qe5-e6 Bd2-c1 Nd3xf2 Nd1xf2 Kf1-g2 Nf2-d3+ Kg2-f3 Rc2-c3 Kf3-g4 Bc1-d2 Kg4-f5 Kb1-c2 Kf5-f6 b2-b1Q Kf6-g7 Kc2-b2 Qe6-d5 Qb1-g1+ Kg7-f7 Rc3-c7+ Kf7-e8
33/53- 01:15 509,248k 6,723k -40.84 Ne6-f4 Qc2-d3+
33/53- 01:17 521,475k 6,723k -40.90 Ne6-f4 Qc2-d3+
33/53+ 01:18 526,168k 6,724k -40.84 Ne6-f4
33/53- 01:20 538,282k 6,723k -40.97 Ne6-f4 Qc2-d3+
33/54- 04:21 1,692,515k 6,483k -49.67 Ne6-f4 Qc2-d3+
33/54+ 04:25 1,724,209k 6,483k -48.17 Ne6-f4
33/54- 04:36 1,789,080k 6,477k -51.92 Ne6-f4 Qc2-d3+
33/54+ 04:43 1,836,446k 6,484k -48.64 Ne6-f4
33/54+ 04:43 1,836,456k 6,484k -12.77 Ne6-f4
33/54 04:43 1,840,069k 6,486k 0.00 Ne6-f4 Qc2-d3+ Nf4xd3+ c4xd3 Qe5-c3+ b4xc3 Nf3-e5 Kc1-c2 Ne5-c4 Kc2-c1
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Chessqueen
Posts: 5685
Joined: Wed Sep 05, 2018 2:16 am
Location: Moving
Full name: Jorge Picado

Re: White to move and force mate in 81

Post by Chessqueen »

Honestly this is a smart executed forced DRAW
[pgn][Event "Computer chess game"]
[Date "2023.07.07"]
[Round "?"]
[White "Berserk-11.1-x64-avx2"]
[Black "Berserk-11.1-x64-avx2"]
[Result "1/2-1/2"]
[BlackElo "3505"]
[Time "21:07:16"]
[WhiteElo "3505"]
[TimeControl "0+5"]
[SetUp "1"]
[FEN "8/8/4N3/4Q3/1pp5/1p3N2/bpqp1p2/nrkrbK2 w - - 0 1"]
[Termination "normal"]
[PlyCount "15"]
[WhiteType "program"]
[BlackType "program"]

1. Nf4 {(Ne6-f4 Qc2-d3+ Nf4xd3+ c4xd3 Qe5-c3+ b4xc3 Nf3-e5 Kc1-c2 Ne5-c4
Kc2-c1) 0.00/50 2} Qd3+ {(Qc2-d3+ Nf4xd3+ c4xd3 Qe5-c3+ b4xc3 Nf3-e5 Kc1-c2
Ne5-c4 Kc2-c1) 0.00/48 1} 2. Nxd3+ {(Nf4xd3+ c4xd3 Qe5-c3+ b4xc3 Nf3-e5
Kc1-c2 Ne5-c4 Kc2-c1) 0.00/50 1} cxd3 {(c4xd3 Qe5-c3+ b4xc3 Nf3-e5 Kc1-c2
Ne5-c4 Kc2-c1) 0.00/50 1} 3. Qc3+ {(Qe5-c3+ b4xc3 Nf3-e5 Kc1-c2 Ne5-c4
Kc2-c1) 0.00/60 4} bxc3 {(b4xc3 Nf3-e5 Kc1-c2 Ne5-c4 Kc2-c1) 0.00/113 0} 4.
Ne5 {(Nf3-e5 Kc1-c2 Ne5-c4 Kc2-c1) 0.00/119 0} Kc2 {(Kc1-c2 Ne5-c4 Kc2-c1
Nc4-e5) -0.01/119 0} 5. Nc4 {(Ne5-c4 Kc2-c1 Nc4-e5 Kc1-c2) 0.00/136 3} Kc1
{(Kc2-c1 Nc4-e5 Kc1-c2 Ne5-c4) -0.01/119 0} 6. Ne5 {(Nc4-e5 Kc1-c2 Ne5-c4
Kc2-c1) 0.00/122 1} Kc2 {(Kc1-c2 Ne5-c4 Kc2-c1) 0.00/114 0} 7. Nc4 {(Ne5-c4
Kc2-c1) 0.00/154 4} Kc1 {(Kc2-c1) 0.00/174 1} 8. Ne5 {(Nc4-e5) 0.00/127 4
3-fold repetition} 1/2-1/2[/pgn]
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acase
Posts: 998
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: White to move and force mate in 81

Post by acase »

Chessqueen wrote: ↑Sat Jul 08, 2023 3:51 am

It is NOT a misprint, but it could be a mistyped, when they tried to type 167 moves and they wrote 163 moves, because that particular puzzle is famous and it has been around since 1890 WAO :roll:
A mistype = a digital misprint :roll:
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peter
Posts: 3469
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: White to move and force mate in 81

Post by peter »

acase wrote: ↑Fri Jul 07, 2023 1:42 pm Perhaps it's a misprint or something, or maybe Gustav found a shorter mate.
Indeed Gustav did so, its author wrote about it in "Die Schwalbe", to be found here:

https://pdb.dieschwalbe.de/P1410779
Olaf Jenkner wrote: Diese Nebenlösung ist wahrscheinlich noch unbekannt.
Die Aufgabe wäre korrekt mit der Zusatzbedingung: "Weiße Springer ziehen nicht außer im Mattzug".
Weiß kann seinen König frech einem Gegenschach aussetzen und spart damit Züge ein (9. ... Sf3+). (2023-07-08)
Here's a .pgn of mine including the lines frome the given link:

[pgn][Event "Vielzuegige Schachaufgaben 47"]
[Site "?"]
[Date "1890.??.??"]
[Round "?"]
[White "Blathy, O.."]
[Black "0748.08a8c3, HHdbVI"]
[Result "1-0"]
[Annotator "Gustav"]
[SetUp "1"]
[FEN "K7/p3p1p1/1p2p1p1/rp4B1/brpn4/Rnk5/8/4N1N1 w - - 0 1"]
[PlyCount "325"]
[EventDate "1890.??.??"]

1. Bc1 e5 {Gustav} (1... Ra6 $5 {Original} 2. Kb7 Ra5 3. Kc7 {Gustav} (3. Kc8 $5 {Original} Ra6 4. Kc7 Ra5 5. Kb7 g5 6. Kc8 Ra6 7. Kc7 Ra5 8. Kb7 e5 9. Kc8 Ra6 10. Kd7 Ra5 11. Ke8 Ra6 12. Kf7 Ra5 13. Kg8 Ra6 14. Kh7 Ra5 15. Kh8 Ra6 16. Kg8 Ra5 17. Kf7 Ra6 18. Ke8 Ra5 19. Kd7 Ra6 20. Kc8 Ra5 21. Kb7 e4 22. Kc8 Ra6 23. Kd7 Ra5 24. Ke8 Ra6 25. Kf7 Ra5 26. Kg8 Ra6 27. Kh7 Ra5 28. Kh8 Ra6 29. Kg8 Ra5 30. Kf7 Ra6 31. Ke8 Ra5 32. Kd7 Ra6 33. Kc8 Ra5 34. Kb7 e3 35. Kc8 Ra6 36. Kd7 Ra5 37. Ke8 Ra6 38. Kf7 Ra5 39. Kg8 Ra6 40. Kh7 Ra5 41. Kh8 Ra6 42. Kg8 Ra5 43. Kf7 Ra6 44. Ke8 Ra5 45. Kd7 Ra6 46. Kc8 Ra5 47. Kb7 e2 48. Kc8 Ra6 49. Kd7 Ra5 50. Ke8 Ra6 51. Kf7 Ra5 52. Kg8 Ra6 53. Kh7 Ra5 54. Kh8 Ra6 55. Kg8 Ra5 56. Kf7 Ra6 57. Ke8 Ra5 58. Kd7 Ra6 59. Kc8 Ra5 60. Kb7 g4 61. Kc8 Ra6 62. Kd7 Ra5 63. Ke8 Ra6 64. Kf7 Ra5 65. Kg8 Ra6 66. Kh7 Ra5 67. Kh8 Ra6 68. Kg8 Ra5 69. Kf7 Ra6 70. Ke8 Ra5 71. Kd7 Ra6 72. Kc8 Ra5 73. Kb7 g3 74. Kc8 Ra6 75. Kd7 Ra5 76. Ke8 Ra6 77. Kf7 Ra5 78. Kg8 Ra6 79. Kh7 Ra5 80. Kh8 Ra6 81. Kg8 Ra5 82. Kf7 Ra6 83. Ke8 Ra5 84. Kd7 Ra6 85. Kc8 Ra5 86. Kb7 g2 87. Kc8 Ra6 88. Kd7 Ra5 89. Ke8 Ra6 90. Kf7 Ra5 91. Kg8 Ra6 92. Kh7 Ra5 93. Kh8 Ra6 94. Kg8 Ra5 95. Kf7 Ra6 96. Ke8 Ra5 97. Kd7 Ra6 98. Kc8 Ra5 99. Kb7 e6 100. Kc8 Ra6 101. Kc7 Ra5 102. Kb7 e5 103. Kc8 Ra6 104. Kd7 Ra5 105. Ke8 Ra6 106. Kf7 Ra5 107. Kg8 Ra6 108. Kh7 Ra5 109. Kh8 Ra6 110. Kg8 Ra5 111. Kf7 Ra6 112. Ke8 Ra5 113. Kd7 Ra6 114. Kc8 Ra5 115. Kb7 e4 116. Kc8 Ra6 117. Kd7 Ra5 118. Ke8 Ra6 119. Kf7 Ra5 120. Kg8 Ra6 121. Kh7 Ra5 122. Kh8 Ra6 123. Kg8 Ra5 124. Kf7 Ra6 125. Ke8 Ra5 126. Kd7 Ra6 127. Kc8 Ra5 128. Kb7 e3 129. Kc8 Ra6 130. Kd7 Ra5 131. Ke8 Ra6 132. Kf7 Ra5 133. Kg8 Ra6 134. Kh7 Ra5 135. Kh8 Ra6 136. Kg8 Ra5 137. Kf7 Ra6 138. Ke8 Ra5 139. Kd7 Ra6 140. Kc8 Ra5 141. Kb7 g5 142. Kc8 Ra6 143. Kd7 Ra5 144. Ke8 Ra6 145. Kf7 Ra5 146. Kg6 Ra6 147. Kf6 Ra5 148. Kf7 Ra6 149. Ke8 Ra5 150. Kd7 Ra6 151. Kc8 Ra5 152. Kb7 g4 153. Kc8 Ra6 154. Kd7 Ra5 155. Ke8 Ra6 156. Kf7 Ra5 157. Kg6 Ra6 158. Kh5 Ra5 159. Kxg4 Ra6 160. Kh5 Ra5 161. Kg6 Ra6 162. Kf6 Ra5 163. Kf7 Ra6 164. Ke8 Ra5 165. Kd7 Ra6 166. Kc8 Ra5 167. Kb7 a6 168. Ka8 Nc6 169. Nxe2# {Original}) 3... Ra6 4. Kc8 Ra5 5. Kd7 Ra6 6. Ke8 Ra5 7. Kf7 g5 8. Kg6 g4 (8... Ra6 $6 9. Kxg5 Ra5 (9... Nf3+ $2 10. Ngxf3 e5 11. Kf5 e4 12. Kxe4 e5 13. Ng1 Ra5 14. Ne2#) 10. Kh5 Ra6 11. Kg6 Ra5 12. Kf7 Ra6 13. Ke8 Ra5 14. Kd7 Ra6 15. Kc8 Ra5 16. Kb7 e5 17. Kc8 Ra6 18. Kd7 Ra5 19. Ke8 Ra6 20. Kf7 Ra5 21. Kg6 Ra6 22. Kh7 Ra5 23. Kh8 Ra6 24. Kg8 Ra5 25. Kf7 Ra6 26. Ke8 Ra5 27. Kd7 Ra6 28. Kc8 Ra5 29. Kb7 e4 30. Kc8 Ra6 31. Kd7 Ra5 32. Ke8 Ra6 33. Kf7 Ra5 34. Kg6 Ra6 35. Kh7 Ra5 36. Kh8 Ra6 37. Kg8 Ra5 38. Kf7 Ra6 39. Ke8 Ra5 40. Kd7 Ra6 41. Kc8 Ra5 42. Kb7 e3 43. Kc8 Ra6 44. Kd7 Ra5 45. Ke8 Ra6 46. Kf7 Ra5 47. Kg6 Ra6 48. Kh7 Ra5 49. Kh8 Ra6 50. Kg8 Ra5 51. Kf7 Ra6 52. Ke8 Ra5 53. Kd7 Ra6 54. Kc8 Ra5 55. Kb7 e2 56. Kc8 Ra6 57. Kd7 Ra5 58. Ke8 Ra6 59. Kf7 Ra5 60. Kg6 Ra6 61. Kh7 Ra5 62. Kh8 Ra6 63. Kg8 Ra5 64. Kf7 Ra6 65. Ke8 Ra5 66. Kd7 Ra6 67. Kc8 Ra5 68. Kb7 e6 69. Kc7 Ra6 70. Kc8 Ra5 71. Kb7 e5 72. Kc8 Ra6 73. Kd7 Ra5 74. Ke8 Ra6 75. Kf7 Ra5 76. Kg6 Ra6 77. Kh7 Ra5 78. Kh8 Ra6 79. Kg8 Ra5 80. Kf7 Ra6 81. Ke8 Ra5 82. Kd7 Ra6 83. Kc8 Ra5 84. Kb7 e4 85. Kc8 Ra6 86. Kd7 Ra5 87. Ke8 Ra6 88. Kf7 Ra5 89. Kg6 Ra6 90. Kh7 Ra5 91. Kh8 Ra6 92. Kg8 Ra5 93. Kf7 Ra6 94. Ke8 Ra5 95. Kd7 Ra6 96. Kc8 Ra5 97. Kb7 e3 98. Kc8 Ra6 99. Kd7 Ra5 100. Ke8 Ra6 101. Kf7 Ra5 102. Kg6 Ra6 103. Kh7 Ra5 104. Kh8 Ra6 105. Kg8 Ra5 106. Kf7 Ra6 107. Ke8 Ra5 108. Kd7 Ra6 109. Kc8 Ra5 110. Kb7 g5 (110... g6 $5 111. Kc8 Ra6 112. Kd7 Ra5 113. Ke8 Ra6 114. Kf7 g5 115. Ke8 Ra5 116. Kd7 Ra6 117. Kc8 Ra5 118. Kb7 g4 119. Kc8 Ra6 120. Kd7 Ra5 121. Ke8 Ra6 122. Kf7 Ra5 123. Kg6 Ra6 124. Kh5 g3 125. Kg6 Ra5 126. Kf7 Ra6 127. Ke8 Ra5 128. Kd7 Ra6 129. Kc8 Ra5 130. Kb7 g2 131. Kc8 Ra6 132. Kd7 Ra5 133. Ke8 Ra6 134. Kf7 Ra5 135. Kf6 Ra6 136. Kg6 Ra5 137. Kf7 Ra6 138. Ke8 Ra5 139. Kd7 Ra6 140. Kc8 Ra5 141. Kb7 a6 142. Kxb6 Nf5 143. Nxe2#) 111. Kc8 Ra6 112. Kd7 Ra5 113. Ke8 Ra6 114. Kf7 Ra5 115. Kf6 Ra6 116. Kg6 Ra5 117. Kf7 Ra6 118. Ke8 Ra5 119. Kd7 Ra6 120. Kc8 Ra5 121. Kb7 g4 122. Kc8 Ra6 123. Kd7 Ra5 124. Ke8 Ra6 125. Kf7 Ra5 126. Kg6 Ra6 127. Kh5 g3 128. Kg6 Ra5 129. Kf7 Ra6 130. Ke8 Ra5 131. Kd7 Ra6 132. Kc8 Ra5 133. Kb7 g2 134. Kc8 Ra6 135. Kd7 Ra5 136. Ke8 Ra6 137. Kf7 Ra5 138. Kf6 Ra6 139. Kg6 Ra5 140. Kf7 Ra6 141. Ke8 Ra5 142. Kd7 Ra6 143. Kc8 Ra5 144. Kb7 Ra6 145. Kxa6 Nc6 146. Nxe2#) 9. Kf7 Ra6 10. Ke8 Ra5 11. Kd7 Ra6 12. Kc8 Ra5 13. Kb7 e5 14. Kc8 Ra6 15. Kd7 Ra5 16. Ke8 Ra6 17. Kf7 Ra5 18. Kg6 Ra6 19. Kh7 Ra5 20. Kh8 Ra6 21. Kg8 Ra5 22. Kf7 Ra6 23. Ke8 Ra5 24. Kd7 Ra6 25. Kc8 Ra5 26. Kb7 g3 27. Kc8 Ra6 28. Kd7 Ra5 29. Ke8 Ra6 30. Kf7 Ra5 31. Kg6 Ra6 32. Kh7 Ra5 33. Kh8 Ra6 34. Kg8 Ra5 35. Kf7 Ra6 36. Ke8 Ra5 37. Kd7 Ra6 38. Kc8 Ra5 39. Kb7 g2 40. Kc8 Ra6 41. Kd7 Ra5 42. Ke8 Ra6 43. Kf7 Ra5 44. Kg6 Ra6 45. Kh7 Ra5 46. Kh8 Ra6 47. Kg8 Ra5 48. Kf7 Ra6 49. Ke8 Ra5 50. Kd7 Ra6 51. Kc8 Ra5 52. Kb7 e4 53. Kc8 Ra6 54. Kd7 Ra5 55. Ke8 Ra6 56. Kf7 Ra5 57. Kg6 Ra6 58. Kh7 Ra5 59. Kh8 Ra6 60. Kg8 Ra5 61. Kf7 Ra6 62. Ke8 Ra5 63. Kd7 Ra6 64. Kc8 Ra5 65. Kb7 e3 66. Kc8 Ra6 67. Kd7 Ra5 68. Ke8 Ra6 69. Kf7 Ra5 70. Kg6 Ra6 71. Kh7 Ra5 72. Kh8 Ra6 73. Kg8 Ra5 74. Kf7 Ra6 75. Ke8 Ra5 76. Kd7 Ra6 77. Kc8 Ra5 78. Kb7 e2 79. Kc8 Ra6 80. Kd7 Ra5 81. Ke8 Ra6 82. Kf7 Ra5 83. Kg6 Ra6 84. Kh7 Ra5 85. Kh8 Ra6 86. Kg8 Ra5 87. Kf7 Ra6 88. Ke8 Ra5 89. Kd7 Ra6 90. Kc8 Ra5 91. Kb7 e6 92. Kc7 Ra6 93. Kc8 Ra5 94. Kb7 e5 95. Kc8 Ra6 96. Kd7 Ra5 97. Ke8 Ra6 98. Kf7 Ra5 99. Kg6 Ra6 100. Kh7 Ra5 101. Kh8 Ra6 102. Kg8 Ra5 103. Kf7 Ra6 104. Ke8 Ra5 105. Kd7 Ra6 106. Kc8 Ra5 107. Kb7 e4 108. Kc8 Ra6 109. Kd7 Ra5 110. Ke8 Ra6 111. Kf7 Ra5 112. Kg6 Ra6 113. Kh7 Ra5 114. Kh8 Ra6 115. Kg8 Ra5 116. Kf7 Ra6 117. Ke8 Ra5 118. Kd7 Ra6 119. Kc8 Ra5 120. Kb7 e3 121. Kc8 Ra6 122. Kd7 Ra5 123. Ke8 Ra6 124. Kf7 Ra5 125. Kg6 Ra6 126. Kh7 Ra5 127. Kh8 Ra6 128. Kg8 Ra5 129. Kf7 Ra6 130. Ke8 Ra5 131. Kd7 Ra6 132. Kc8 Ra5 133. Kb7 g5 (133... g6 $5 134. Kc8 Ra6 135. Kd7 Ra5 136. Ke8 Ra6 137. Kf7 g5 138. Ke8 Ra5 139. Kd7 Ra6 140. Kc8 Ra5 141. Kb7 g4 142. Kc8 Ra6 143. Kd7 Ra5 144. Ke8 Ra6 145. Kf7 Ra5 146. Kf6 Ra6 147. Kg6 Ra5 148. Kh5 Ra6 149. Kxg4 Ra5 150. Kh5 Ra6 151. Kg6 Ra5 152. Kf7 Ra6 153. Ke8 Ra5 154. Kd7 Ra6 155. Kc8 Ra5 156. Kb7 a6 157. Kxb6 Nf5 158. Nxe2#) 134. Kc8 Ra6 135. Kd7 Ra5 136. Ke8 Ra6 137. Kf7 Ra5 138. Kf6 Ra6 139. Kg6 Ra5 140. Kf7 Ra6 141. Ke8 Ra5 142. Kd7 Ra6 143. Kc8 Ra5 144. Kb7 g4 145. Kc8 Ra6 146. Kd7 Ra5 147. Ke8 Ra6 148. Kf7 Ra5 149. Kg6 Ra6 150. Kh5 Ra5 151. Kxg4 Ra6 152. Kh5 Ra5 153. Kg6 Ra6 154. Kf6 Ra5 155. Kf7 Ra6 156. Ke8 Ra5 157. Kd7 Ra6 158. Kc8 Ra5 159. Kb7 Ra6 160. Kxa6 Nc6 161. Nxe2#) 2. Kb7 g5 3. Kc8 Ra6 4. Kd7 Ra5 5. Ke8 Ra6 6. Kf7 Ra5 7. Kg6 Ra6 8. Kh7 Ra5 9. Kh8 Ra6 10. Kg8 Ra5 11. Kf7 Ra6 12. Ke8 Ra5 13. Kd7 Ra6 14. Kc8 Ra5 15. Kb7 e4 16. Kc8 Ra6 17. Kd7 Ra5 18. Ke8 Ra6 19. Kf7 Ra5 20. Kg6 Ra6 21. Kh7 Ra5 22. Kh8 Ra6 23. Kg8 Ra5 24. Kf7 Ra6 25. Ke8 Ra5 26. Kd7 Ra6 27. Kc8 Ra5 28. Kb7 e3 29. Kc8 Ra6 30. Kd7 Ra5 31. Ke8 Ra6 32. Kf7 Ra5 33. Kg6 Ra6 34. Kh7 Ra5 35. Kh8 Ra6 36. Kg8 Ra5 37. Kf7 Ra6 38. Ke8 Ra5 39. Kd7 Ra6 40. Kc8 Ra5 41. Kb7 e2 42. Kc8 Ra6 43. Kd7 Ra5 44. Ke8 Ra6 45. Kf7 Ra5 46. Kg6 Ra6 47. Kh7 Ra5 48. Kh8 Ra6 49. Kg8 Ra5 50. Kf7 Ra6 51. Ke8 Ra5 52. Kd7 Ra6 53. Kc8 Ra5 54. Kb7 g4 55. Kc8 Ra6 56. Kd7 Ra5 57. Ke8 Ra6 58. Kf7 Ra5 59. Kg6 Ra6 60. Kh7 Ra5 61. Kh8 Ra6 62. Kg8 Ra5 63. Kf7 Ra6 64. Ke8 Ra5 65. Kd7 Ra6 66. Kc8 Ra5 67. Kb7 g3 68. Kc8 Ra6 69. Kd7 Ra5 70. Ke8 Ra6 71. Kf7 Ra5 72. Kg6 Ra6 73. Kh7 Ra5 74. Kh8 Ra6 75. Kg8 Ra5 76. Kf7 Ra6 77. Ke8 Ra5 78. Kd7 Ra6 79. Kc8 Ra5 80. Kb7 g2 81. Kc8 Ra6 82. Kd7 Ra5 83. Ke8 Ra6 84. Kf7 Ra5 85. Kg6 Ra6 86. Kh7 Ra5 87. Kh8 Ra6 88. Kg8 Ra5 89. Kf7 Ra6 90. Ke8 Ra5 91. Kd7 Ra6 92. Kc8 Ra5 93. Kb7 e6 94. Kc7 Ra6 95. Kc8 Ra5 96. Kb7 e5 97. Kc8 Ra6 98. Kd7 Ra5 99. Ke8 Ra6 100. Kf7 Ra5 101. Kg6 Ra6 102. Kh7 Ra5 103. Kh8 Ra6 104. Kg8 Ra5 105. Kf7 Ra6 106. Ke8 Ra5 107. Kd7 Ra6 108. Kc8 Ra5 109. Kb7 e4 110. Kc8 Ra6 111. Kd7 Ra5 112. Ke8 Ra6 113. Kf7 Ra5 114. Kg6 Ra6 115. Kh7 Ra5 116. Kh8 Ra6 117. Kg8 Ra5 118. Kf7 Ra6 119. Ke8 Ra5 120. Kd7 Ra6 121. Kc8 Ra5 122. Kb7 e3 123. Kc8 Ra6 124. Kd7 Ra5 125. Ke8 Ra6 126. Kf7 Ra5 127. Kg6 Ra6 128. Kh7 Ra5 129. Kh8 Ra6 130. Kg8 Ra5 131. Kf7 Ra6 132. Ke8 Ra5 133. Kd7 Ra6 134. Kc8 Ra5 135. Kb7 g5 (135... g6 $5 136. Kc8 Ra6 137. Kd7 Ra5 138. Ke8 Ra6 139. Kf7 g5 140. Ke8 Ra5 141. Kd7 Ra6 142. Kc8 Ra5 143. Kb7 g4 144. Kc8 Ra6 145. Kd7 Ra5 146. Ke8 Ra6 147. Kf7 Ra5 148. Kg6 Ra6 149. Kh5 Ra5 150. Kxg4 Ra6 151. Kh5 Ra5 152. Kg6 Ra6 153. Kf6 Ra5 154. Kf7 Ra6 155. Ke8 Ra5 156. Kd7 Ra6 157. Kc8 Ra5 158. Kb7 Ra6 159. Kxa6 Ne6 160. Nxe2#) 136. Kc8 Ra6 137. Kd7 Ra5 138. Ke8 Ra6 139. Kf7 Ra5 140. Kf6 Ra6 141. Kg6 Ra5 142. Kf7 Ra6 143. Ke8 Ra5 144. Kd7 Ra6 145. Kc8 Ra5 146. Kb7 g4 147. Kc8 Ra6 148. Kd7 Ra5 149. Ke8 Ra6 150. Kf7 Ra5 151. Kg6 Ra6 152. Kh5 Ra5 153. Kxg4 Ra6 154. Kh5 Ra5 155. Kg6 Ra6 156. Kf6 Ra5 157. Kf7 Ra6 158. Ke8 Ra5 159. Kd7 Ra6 160. Kc8 Ra5 161. Kb7 Ra6 162. Kxa6 Nc6 163. Nxe2# 1-0
[/pgn]
Peter.
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