+M27
[pgn]
[Event "M27 Puzzle"]
[Site "Talkchess"]
[Date "2020.06.20"]
[Round "?"]
[White "SF"]
[Black "SF"]
[Result "1-0"]
[BlackElo "2400"]
[Time "21:28:45"]
[WhiteElo "2400"]
[TimeControl "480+5"]
[SetUp "1"]
[FEN "k4n2/ppp1NK1p/2pB2p1/1Q6/3p4/4rpb1/RP3rP1/4q1nb w - - 0 1"]
[Termination "normal"]
[PlyCount "53"]
[WhiteType "human"]
[BlackType "human"]
1. Rxa7+ Kxa7 2. Nxc6+ bxc6 3. Bc5+ Ka8 4. Qa6+ Kb8 5. Ba7+ Ka8 6. Bxd4+
Kb8 7. Ba7+ Ka8 8. Bxe3+ Kb8 9. Ba7+ Ka8 10. Bxf2+ Kb8 11. Ba7+ Ka8 12.
Bxg1+ Kb8 13. Ba7+ Ka8 14. Be3+ Kb8 15. Qa7+ Kc8 16. Qa8+ Kd7 17. Qe8+ Kd6
18. Qxf8+ Kd5 19. Qc5+ Ke4 20. Qd4+ Kf5 21. Qd3+ Ke5 22. Bd4+ Kf4 23. Qxf3+
Kg5 24. Bf6+ Kh6 25. Qg4 Qe5 26. Bxe5 c5 27. Bg7# 1-0
[/pgn]
Hard Puzzles found on Gameknot
Moderators: hgm, Rebel, chrisw
-
MikeGL
- Posts: 1010
- Joined: Thu Sep 01, 2011 2:49 pm
Re: Hard Puzzles found on Gameknot
I told my wife that a husband is like a fine wine; he gets better with age. The next day, she locked me in the cellar.
-
Dann Corbit
- Posts: 12537
- Joined: Wed Mar 08, 2006 8:57 pm
- Location: Redmond, WA USA
Re: Hard Puzzles found on Gameknot
The 31 I did not yet solve are in the unsolved file.
The 1240 which are driven to mate are in the other file.
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
-
Dann Corbit
- Posts: 12537
- Joined: Wed Mar 08, 2006 8:57 pm
- Location: Redmond, WA USA
Re: Hard Puzzles found on Gameknot
Alterntively:MikeGL wrote: ↑Sat Jun 20, 2020 3:42 pm +M27
[pgn]
[Event "M27 Puzzle"]
[Site "Talkchess"]
[Date "2020.06.20"]
[Round "?"]
[White "SF"]
[Black "SF"]
[Result "1-0"]
[BlackElo "2400"]
[Time "21:28:45"]
[WhiteElo "2400"]
[TimeControl "480+5"]
[SetUp "1"]
[FEN "k4n2/ppp1NK1p/2pB2p1/1Q6/3p4/4rpb1/RP3rP1/4q1nb w - - 0 1"]
[Termination "normal"]
[PlyCount "53"]
[WhiteType "human"]
[BlackType "human"]
1. Rxa7+ Kxa7 2. Nxc6+ bxc6 3. Bc5+ Ka8 4. Qa6+ Kb8 5. Ba7+ Ka8 6. Bxd4+
Kb8 7. Ba7+ Ka8 8. Bxe3+ Kb8 9. Ba7+ Ka8 10. Bxf2+ Kb8 11. Ba7+ Ka8 12.
Bxg1+ Kb8 13. Ba7+ Ka8 14. Be3+ Kb8 15. Qa7+ Kc8 16. Qa8+ Kd7 17. Qe8+ Kd6
18. Qxf8+ Kd5 19. Qc5+ Ke4 20. Qd4+ Kf5 21. Qd3+ Ke5 22. Bd4+ Kf4 23. Qxf3+
Kg5 24. Bf6+ Kh6 25. Qg4 Qe5 26. Bxe5 c5 27. Bg7# 1-0
[/pgn]
k4n2/ppp1NK1p/2pB2p1/1Q6/3p4/4rpb1/RP3rP1/4q1nb w - - acd 60; bm Rxa7+; ce 32714; dm 27; pv Rxa7+ Kxa7 Nxc6+ bxc6 Bc5+ Ka8 Qa6+ Kb8 Ba7+ Ka8 Bxd4+ Kb8 Ba7+ Ka8 Bxe3+ Kb8 Ba7+ Ka8 Bxf2+ Kb8 Ba7+ Ka8 Bxg1+ Kb8 Ba7+ Ka8 Be3+ Kb8 Qa7+ Kc8 Qa8+ Kd7 Qe8+ Kd6 Qxf8+ Kd5 Qc5+ Ke4 Qd4+ Kf5 Qd3+ Ke5 Bd4+ Kf4 Qxf3+ Kg5 Bf6+ Kh6 Qg4 Qe7+ Bxe7 Bxg2 Qg5+;
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
-
Dann Corbit
- Posts: 12537
- Joined: Wed Mar 08, 2006 8:57 pm
- Location: Redmond, WA USA
Re: Hard Puzzles found on Gameknot
I found prior art for the second but not the first:MikeGL wrote: ↑Sat Jun 20, 2020 3:03 pm Here's the possible Mate in 63 and also M62 solutions (using SF and manual analysis)
There's a glitch in M62 puzzle. My interface keeps on reporting 50-move-rule draw, because there's no capture.
Maybe that, or there is a more efficient mate reaching M62 with captures somewhere.
[pgn]
[Event "+M63 Puzzle"]
[Site "Talkchess"]
[Date "2020.06.20"]
[Round "?"]
[White "SF"]
[Black "SF"]
[Result "1-0"]
[BlackElo "2400"]
[Time "20:38:56"]
[TimeControl "480+5"]
[SetUp "1"]
[FEN "4Q1R1/1pRp1rbp/1Pn2k1q/2P2prb/5Pp1/3p1pP1/3P1P1K/6B1 w - - 0 1"]
[Termination "normal"]
[PlyCount "125"]
[WhiteType "human"]
[BlackType "human"]
1. Rxc6+ dxc6 2. Qe5+ Kg6 3. Qe6+ Rf6 4. Qe8+ Rf7 5. Kh1 Kf6 6. Qe5+ Kg6 7.
Qe6+ Rf6 8. Qe8+ Rf7 9. Bh2 Kf6 10. Qe5+ Kg6 11. Qe6+ Rf6 12. Qe8+ Rf7 13.
Kg1 Kf6 14. Qe5+ Kg6 15. Qe6+ Rf6 16. Qe8+ Rf7 17. Kf1 Kf6 18. Qe5+ Kg6 19.
Qe6+ Rf6 20. Qe8+ Rf7 21. Ke1 Kf6 22. Qe5+ Kg6 23. Qe6+ Rf6 24. Qe8+ Rf7
25. Kd1 Kf6 26. Qe5+ Kg6 27. Qe6+ Rf6 28. Qe8+ Rf7 29. Kc1 Kf6 30. Qe5+ Kg6
31. Qe6+ Rf6 32. Qe8+ Rf7 33. Kb1 Kf6 34. Qe5+ Kg6 35. Qe6+ Rf6 36. Qe8+
Rf7 37. Ka2 Kf6 38. Qe5+ Kg6 39. Qe6+ Rf6 40. Qe8+ Rf7 41. Kb3 Kf6 42. Qe5+
Kg6 43. Qe6+ Rf6 44. Qe8+ Rf7 45. Kc4 Kf6 46. Qe5+ Kg6 47. Qe6+ Rf6 48.
Qe8+ Rf7 49. Kxd3 Kf6 50. Qe5+ Kg6 51. Qe6+ Rf6 52. Qe8+ Rf7 53. Kc4 Kf6
54. Qe5+ Kg6 55. Qe6+ Rf6 56. Qe8+ Rf7 57. d4 Kf6 58. Qe5+ Kg6 59. Qe6+ Rf6
60. Qe8+ Rf7 61. d5 cxd5+ 62. Kxd5 Kf6 63. Qe6# 1-0
[/pgn]
[pgn]
[Event "+M62 Puzzle"]
[Site "Talkchess"]
[Date "2020.06.20"]
[Round "?"]
[White "SF"]
[Black "SF"]
[Result "1-0"]
[BlackElo "2400"]
[Time "20:49:13"]
[WhiteElo "2400"]
[TimeControl "480+5"]
[SetUp "1"]
[FEN "8/1ppr4/br6/1pkp4/2p1Qp2/KPp2p2/B1PP1P2/8 w - - 0 1"]
[Termination "normal"]
[PlyCount "123"]
[WhiteType "human"]
[BlackType "human"]
1. d4+ Kd6 2. Qe5+ Kc6 3. Qe6+ Rd6 4. Qe8+ Rd7 5. b4 Kd6 6. Qe5+ Kc6 7.
Qe6+ Rd6 8. Qe8+ Rd7 9. Bb1 Kd6 10. Qe5+ Kc6 11. Qe6+ Rd6 12. Qe8+ Rd7 13.
Ka2 Kd6 14. Qe5+ Kc6 15. Qe6+ Rd6 16. Qe8+ Rd7 17. Ka1 Kd6 18. Qe5+ Kc6 19.
Qe6+ Rd6 20. Qe8+ Rd7 21. Ba2 Kd6 22. Qe5+ Kc6 23. Qe6+ Rd6 24. Qe8+ Rd7
25. Kb1 Kd6 26. Qe5+ Kc6 27. Qe6+ Rd6 28. Qe8+ Rd7 29. Kc1 Kd6 30. Qe5+ Kc6
31. Qe6+ Rd6 32. Qe8+ Rd7 33. Kd1 Kd6 34. Qe5+ Kc6 35. Qe6+ Rd6 36. Qe8+
Rd7 37. Ke1 Kd6 38. Qe5+ Kc6 39. Qe6+ Rd6 40. Qe8+ Rd7 41. Kf1 Kd6 42. Qe5+
Kc6 43. Qe6+ Rd6 44. Qe8+ Rd7 45. Kg1 Kd6 46. Qe5+ Kc6 47. Qe6+ Rd6 48.
Qe8+ Rd7 49. Kh2 Kd6 50. Qe5+ Kc6 51. Qe6+ Rd6 52. Qe8+ Rd7 53. Kh3 Kd6 54.
Qe5+ Kc6 55. Qe6+ {50 moves rule} Rd6 {50 moves rule} 56. Qe8+ {50 moves
rule} Rd7 {50 moves rule} 57. Kg4 {50 moves rule} Kd6 {50 moves rule} 58.
Qe5+ {50 moves rule} Kc6 {50 moves rule} 59. Qe6+ {50 moves rule} Rd6 {50
moves rule} 60. Qe8+ {50 moves rule} Rd7 {50 moves rule} 61. Kf5 {50 moves
rule} Kd6 {50 moves rule} 62. Qe6# 1-0
[/pgn]
http://jornalheiros.blogspot.com/2020/0 ... novic.html
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
-
MOBMAT
- Posts: 385
- Joined: Sat Feb 04, 2017 11:57 pm
- Location: USA
Re: Hard Puzzles found on Gameknot
The 13s were pretty easy.
[d]8/4Kp2/2p1nR2/2PkP3/4nP1p/BP2P1pr/1p2P1p1/1N4Nb w - -
Crystal 2.0: +M13 1.Rxe6 fxe6 2.Kd8 Rh2 3.Kc7 Rh3 4.Kb6 Rh2 5.Bxb2 Rh3 6.Bd4 Rh2 7.Kc7 Rh3 8.Kd8 Rh2 9.Ke7 Rh3 10.f5 Rh2 11.f6 h3 12.Kd8 Nxc5 13.Nc3+
[d]8/3pK3/2p1nR2/2PkP3/4nP1p/BP2P1pr/1p2P1p1/1N4Nb w - -
Crystal 2.0: +M13 1.Rxe6 dxe6 2.Kd8 Rh2 3.Kc7 Rh3 4.Kb6 Rh2 5.Bxb2 Rh3 6.Bd4 Rh2 7.Kc7 Rh3 8.Kd8 Rh2 9.Ke7 Rh3 10.f5 Rh2 11.f6 Rh3 12.Nxh3 Nxc5 13.Nc3+
[d]8/4pKpp/2R1Q1rk/6pb/8/5N1P/p2R4/r7 w - -
Crystal 2.0: +M13 1.Qxg6+ Bxg6+ 2.Rxg6+ hxg6 3.Rd8 Kh7 4.Nxg5+ Kh6 5.Nf3 Kh7 6.Rd4 g5 7.Nxg5+ Kh6 8.Nf3 g5 9.Rd8 Kh7 10.Nxg5+ Kh6 11.Nf3 Kh7 12.Rd4 Rf1 13.Rh4+
[d]8/4Kp2/2p1nR2/2PkP3/4nP1p/BP2P1pr/1p2P1p1/1N4Nb w - -
Crystal 2.0: +M13 1.Rxe6 fxe6 2.Kd8 Rh2 3.Kc7 Rh3 4.Kb6 Rh2 5.Bxb2 Rh3 6.Bd4 Rh2 7.Kc7 Rh3 8.Kd8 Rh2 9.Ke7 Rh3 10.f5 Rh2 11.f6 h3 12.Kd8 Nxc5 13.Nc3+
[d]8/3pK3/2p1nR2/2PkP3/4nP1p/BP2P1pr/1p2P1p1/1N4Nb w - -
Crystal 2.0: +M13 1.Rxe6 dxe6 2.Kd8 Rh2 3.Kc7 Rh3 4.Kb6 Rh2 5.Bxb2 Rh3 6.Bd4 Rh2 7.Kc7 Rh3 8.Kd8 Rh2 9.Ke7 Rh3 10.f5 Rh2 11.f6 Rh3 12.Nxh3 Nxc5 13.Nc3+
[d]8/4pKpp/2R1Q1rk/6pb/8/5N1P/p2R4/r7 w - -
Crystal 2.0: +M13 1.Qxg6+ Bxg6+ 2.Rxg6+ hxg6 3.Rd8 Kh7 4.Nxg5+ Kh6 5.Nf3 Kh7 6.Rd4 g5 7.Nxg5+ Kh6 8.Nf3 g5 9.Rd8 Kh7 10.Nxg5+ Kh6 11.Nf3 Kh7 12.Rd4 Rf1 13.Rh4+
i7-6700K @ 4.00Ghz 32Gb, Win 10 Home, EGTBs on PCI SSD
Benchmark: Stockfish15.1 NNUE x64 bmi2 (nps): 1277K
Benchmark: Stockfish15.1 NNUE x64 bmi2 (nps): 1277K
-
MOBMAT
- Posts: 385
- Joined: Sat Feb 04, 2017 11:57 pm
- Location: USA
Re: Hard Puzzles found on Gameknot
14s were easy as well
[d]6r1/1p1R4/k1b4b/P1R3pr/BB3pp1/2P5/KP5p/8 w - -
Crystal 2.0: +M14 1.Rxc6+ bxc6 2.Bb3 Kb5 3.Rb7+ Ka6 4.Re7 Kb5 5.Ba4+ Ka6 6.Bd1 f3 7.Bb3 Kb5 8.Rb7+ Ka6 9.Rd7 Kb5 10.Ba4+ Ka6 11.Bc2 Rb8 12.Bd3+ Rb5 13.Bc5 h1Q 14.Ra7+
[d]8/1p1p1p2/nP1P1P2/8/2B2Pp1/p1B3P1/rrp3PK/kbR5 w - -
Crystal 2.0: +M14 1.Bxa6 bxa6 2.b7 a5 3.b8N a4 4.Nc6 dxc6 5.d7 c5 6.d8N c4 7.Ne6 fxe6 8.f7 e5 9.f5 e4 10.f8B e3 11.Bh6 e2 12.Re1 c1Q 13.Bxc1 Bxf5 14.B1xb2+
[d]4B1b1/2p1B1Kp/4p2p/nP1k3N/1P4P1/2pPP1pP/pb2n3/8 w - -
Crystal 2.0: +M14 1.Nf6+ Ke5 2.Bg6 hxg6 3.Ne8 Kd5 4.Nxc7+ Ke5 5.Ne8 Kd5 6.Nf6+ Ke5 7.Nd7+ Kd5 8.Nb6+ Ke5 9.Bc5 c2 10.Kf8 Nc3 11.Nd7+ Kd5 12.Nf6+ Ke5 13.d4+ Kxf6 14.Be7+
[d]6r1/1p1R4/k1b4b/P5pr/BBR2pp1/2P5/KP5p/8 w - -
Crystal 2.0: +M14 1.Rxc6+ bxc6 2.Bb3 Kb5 3.Rb7+ Ka6 4.Re7 Kb5 5.Ba4+ Ka6 6.Bd1 f3 7.Bb3 Kb5 8.Rb7+ Ka6 9.Rd7 Kb5 10.Ba4+ Ka6 11.Bc2 Rb8 12.Bd3+ Rb5 13.Bc5 Kxa5 14.Ra7+
[d]6r1/1p1R4/k1b4b/P1R3pr/BB3pp1/2P5/KP5p/8 w - -
Crystal 2.0: +M14 1.Rxc6+ bxc6 2.Bb3 Kb5 3.Rb7+ Ka6 4.Re7 Kb5 5.Ba4+ Ka6 6.Bd1 f3 7.Bb3 Kb5 8.Rb7+ Ka6 9.Rd7 Kb5 10.Ba4+ Ka6 11.Bc2 Rb8 12.Bd3+ Rb5 13.Bc5 h1Q 14.Ra7+
[d]8/1p1p1p2/nP1P1P2/8/2B2Pp1/p1B3P1/rrp3PK/kbR5 w - -
Crystal 2.0: +M14 1.Bxa6 bxa6 2.b7 a5 3.b8N a4 4.Nc6 dxc6 5.d7 c5 6.d8N c4 7.Ne6 fxe6 8.f7 e5 9.f5 e4 10.f8B e3 11.Bh6 e2 12.Re1 c1Q 13.Bxc1 Bxf5 14.B1xb2+
[d]4B1b1/2p1B1Kp/4p2p/nP1k3N/1P4P1/2pPP1pP/pb2n3/8 w - -
Crystal 2.0: +M14 1.Nf6+ Ke5 2.Bg6 hxg6 3.Ne8 Kd5 4.Nxc7+ Ke5 5.Ne8 Kd5 6.Nf6+ Ke5 7.Nd7+ Kd5 8.Nb6+ Ke5 9.Bc5 c2 10.Kf8 Nc3 11.Nd7+ Kd5 12.Nf6+ Ke5 13.d4+ Kxf6 14.Be7+
[d]6r1/1p1R4/k1b4b/P5pr/BBR2pp1/2P5/KP5p/8 w - -
Crystal 2.0: +M14 1.Rxc6+ bxc6 2.Bb3 Kb5 3.Rb7+ Ka6 4.Re7 Kb5 5.Ba4+ Ka6 6.Bd1 f3 7.Bb3 Kb5 8.Rb7+ Ka6 9.Rd7 Kb5 10.Ba4+ Ka6 11.Bc2 Rb8 12.Bd3+ Rb5 13.Bc5 Kxa5 14.Ra7+
i7-6700K @ 4.00Ghz 32Gb, Win 10 Home, EGTBs on PCI SSD
Benchmark: Stockfish15.1 NNUE x64 bmi2 (nps): 1277K
Benchmark: Stockfish15.1 NNUE x64 bmi2 (nps): 1277K
-
MOBMAT
- Posts: 385
- Joined: Sat Feb 04, 2017 11:57 pm
- Location: USA
Re: Hard Puzzles found on Gameknot
4 of 5 the M15
[d]5b1r/6p1/3p1rQn/8/N1kN1K2/2P1p3/2Bn2R1/8 w - -
Crystal 2.0: +M15 1.Qxf6 gxf6 2.Rxd2 exd2 3.Bb3+ Kd3 4.Bd1 Kc4 5.Be2+ Kd5 6.Nb6+ Kc5 7.Nd7+ Kd5 8.Nxf6+ Kc5 9.Nd7+ Kd5 10.Nb6+ Kc5 11.Na4+ Kd5 12.Bd1 Kc4 13.Ke4 d5+ 14.Kf3 Bd6 15.Be2+
[d]3K1b2/2B1pppB/4P3/1p6/k1NP2p1/3R3b/p3P3/8 w - -
Crystal 2.0: +M15 1.Nb2+ Kb4 2.Bf4 Ka5 3.Ra3+ Kb4 4.Rg3 Ka5 5.Bc7+ Kb4 6.Bc2 a1N 7.Bf4 Ka5 8.Ra3+ Kb4 9.Rd3 Ka5 10.Bc7+ Kb4 11.Bd1 Bg2 12.Bb6 Nc2 13.Bxc2 Bd5 14.Bc5+ Ka5 15.Ra3+
[d]R7/1p1p1p2/n2pbP1N/p2p1p2/P2P1P2/4p3/2K1N3/k7 w - -
Crystal 2.0: +M15 1.Rxa6 bxa6 2.Kb3 Kb1 3.Ng8 Ka1 4.Ne7 Kb1 5.Nc8 Ka1 6.Nb6 Kb1 7.Na8 Ka1 8.Nc7 Kb1 9.Nxa6 Ka1 10.Nc7 Kb1 11.Nb5 Ka1 12.Kc2 Ka2 13.Nc1+ Ka1 14.Nc3 e2 15.Nb3+
[d]2n5/3p1Kp1/6Nn/2P1Pk2/3R4/5Bp1/2r5/2B1b3 w - -
Crystal 2.0: +M15 1.Bxh6 gxh6 2.Rf4+ Kg5 3.Rg4+ Kf5 4.Nh4+ Kxe5 5.Ng6+ Kf5 6.Rf4+ Kg5 7.Rh4 Rh2 8.Rg4+ Kf5 9.Rd4 Nd6+ 10.cxd6 Rd2 11.Re4 Rd5 12.Ne7+ Kg5 13.Rg4+ Kh5 14.Nxd5 g2 15.Nf4+
[d]5b1r/6p1/3p1rQn/8/N1kN1K2/2P1p3/2Bn2R1/8 w - -
Crystal 2.0: +M15 1.Qxf6 gxf6 2.Rxd2 exd2 3.Bb3+ Kd3 4.Bd1 Kc4 5.Be2+ Kd5 6.Nb6+ Kc5 7.Nd7+ Kd5 8.Nxf6+ Kc5 9.Nd7+ Kd5 10.Nb6+ Kc5 11.Na4+ Kd5 12.Bd1 Kc4 13.Ke4 d5+ 14.Kf3 Bd6 15.Be2+
[d]3K1b2/2B1pppB/4P3/1p6/k1NP2p1/3R3b/p3P3/8 w - -
Crystal 2.0: +M15 1.Nb2+ Kb4 2.Bf4 Ka5 3.Ra3+ Kb4 4.Rg3 Ka5 5.Bc7+ Kb4 6.Bc2 a1N 7.Bf4 Ka5 8.Ra3+ Kb4 9.Rd3 Ka5 10.Bc7+ Kb4 11.Bd1 Bg2 12.Bb6 Nc2 13.Bxc2 Bd5 14.Bc5+ Ka5 15.Ra3+
[d]R7/1p1p1p2/n2pbP1N/p2p1p2/P2P1P2/4p3/2K1N3/k7 w - -
Crystal 2.0: +M15 1.Rxa6 bxa6 2.Kb3 Kb1 3.Ng8 Ka1 4.Ne7 Kb1 5.Nc8 Ka1 6.Nb6 Kb1 7.Na8 Ka1 8.Nc7 Kb1 9.Nxa6 Ka1 10.Nc7 Kb1 11.Nb5 Ka1 12.Kc2 Ka2 13.Nc1+ Ka1 14.Nc3 e2 15.Nb3+
[d]2n5/3p1Kp1/6Nn/2P1Pk2/3R4/5Bp1/2r5/2B1b3 w - -
Crystal 2.0: +M15 1.Bxh6 gxh6 2.Rf4+ Kg5 3.Rg4+ Kf5 4.Nh4+ Kxe5 5.Ng6+ Kf5 6.Rf4+ Kg5 7.Rh4 Rh2 8.Rg4+ Kf5 9.Rd4 Nd6+ 10.cxd6 Rd2 11.Re4 Rd5 12.Ne7+ Kg5 13.Rg4+ Kh5 14.Nxd5 g2 15.Nf4+
i7-6700K @ 4.00Ghz 32Gb, Win 10 Home, EGTBs on PCI SSD
Benchmark: Stockfish15.1 NNUE x64 bmi2 (nps): 1277K
Benchmark: Stockfish15.1 NNUE x64 bmi2 (nps): 1277K
-
MOBMAT
- Posts: 385
- Joined: Sat Feb 04, 2017 11:57 pm
- Location: USA
Re: Hard Puzzles found on Gameknot
The in 19s
[d]8/p3B1Kp/4RRb1/1Np1n3/2Bpk1pP/q7/4P3/b1r5 w - -
Crystal 2.0: +M19 1.Rxe5+ Kxe5 2.Bd6+ Ke4 3.Re6+ Kf5 4.Re5+ Kf4 5.Re7+ Kf5 6.Be6+ Ke4 7.Bb3+ Kf5 8.Re5+ Kf4 9.Re6+ Kf5 10.Nc3 Rxc3 11.Re5+ Kf4 12.Re7+ Kf5 13.Be6+ Ke4 14.Bc4+ Kf5 15.Re5+ Kf4 16.Re6+ Kf5 17.e4+ dxe3 18.Rf6+ Ke4 19.Rf4+
[d]8/3Br3/7p/8/pr1Bp3/Kpp3q1/7k/3Q4 w - -
Stockfish DEV 20061313: +M19 1.Qe2+ Kh1 2.Qf1+ Kh2 3.Bg1+ Kh1 4.Be3+ Kh2 5.Qe2+ Kh1 6.Qh5+ Kg2 7.Bh3+ Kh1 8.Be6+ Kg2 9.Qe2+ Kh1 10.Qf1+ Kh2 11.Bg1+ Kh1 12.Bd4+ Kh2 13.Qe2+ Kh1 14.Qxe4+ Kh2 15.Qe2+ Qg2 16.Qh5+ Kg3 17.Qg4+ Kh2 18.Qh4+ Qh3 19.Qxh3+
[d]8/p3B1Kp/4RRb1/1Np1n3/2Bpk1pP/q7/4P3/b1r5 w - -
Crystal 2.0: +M19 1.Rxe5+ Kxe5 2.Bd6+ Ke4 3.Re6+ Kf5 4.Re5+ Kf4 5.Re7+ Kf5 6.Be6+ Ke4 7.Bb3+ Kf5 8.Re5+ Kf4 9.Re6+ Kf5 10.Nc3 Rxc3 11.Re5+ Kf4 12.Re7+ Kf5 13.Be6+ Ke4 14.Bc4+ Kf5 15.Re5+ Kf4 16.Re6+ Kf5 17.e4+ dxe3 18.Rf6+ Ke4 19.Rf4+
[d]8/3Br3/7p/8/pr1Bp3/Kpp3q1/7k/3Q4 w - -
Stockfish DEV 20061313: +M19 1.Qe2+ Kh1 2.Qf1+ Kh2 3.Bg1+ Kh1 4.Be3+ Kh2 5.Qe2+ Kh1 6.Qh5+ Kg2 7.Bh3+ Kh1 8.Be6+ Kg2 9.Qe2+ Kh1 10.Qf1+ Kh2 11.Bg1+ Kh1 12.Bd4+ Kh2 13.Qe2+ Kh1 14.Qxe4+ Kh2 15.Qe2+ Qg2 16.Qh5+ Kg3 17.Qg4+ Kh2 18.Qh4+ Qh3 19.Qxh3+
i7-6700K @ 4.00Ghz 32Gb, Win 10 Home, EGTBs on PCI SSD
Benchmark: Stockfish15.1 NNUE x64 bmi2 (nps): 1277K
Benchmark: Stockfish15.1 NNUE x64 bmi2 (nps): 1277K
-
Vinvin
- Posts: 5228
- Joined: Thu Mar 09, 2006 9:40 am
- Full name: Vincent Lejeune
Re: Hard Puzzles found on Gameknot
Are they all "mate in x" problems ?Nordlandia wrote: ↑Fri Jun 19, 2020 1:21 pm User Moremover on chess.com claims that many of the Puzzles are unsolved.
May be worth to examine further
https://gameknot.com/chess-puzzles.pl?s ... de&m=0&s=9
-
MOBMAT
- Posts: 385
- Joined: Sat Feb 04, 2017 11:57 pm
- Location: USA
Re: Hard Puzzles found on Gameknot
All the mate in 12 from Dan's list
[d]8/5p2/5N2/8/K3nN1p/1p3k2/1Pp2prR/n1B2bbB w - -
Black-Diamond-XR7: +M12 1.Rh3+ Ng3 2.Ka5 Bh2 3.Kb6 Bg1 4.Kc7 Bh2 5.Kd8 Bg1 6.Ke7 Bh2 7.Kf8 Bg1 8.Kg7 Bh2 9.Kh6 Bg1 10.Kg5 Bh2 11.Kxh4 Bg1 12.Rxg3+
[d]5b2/p5p1/4p1P1/1p2Rn1p/1P1k1PRn/PK6/3NP1P1/8 w - -
Black-Diamond-XR7: +M12 1.Rxh4 Nxh4 2.Kc2 Nf5 3.Nb3+ Kc4 4.Na5+ Kd4 5.Kb3 Ne7 6.g3 a6 7.Kc2 Nf5 8.Nb3+ Kc4 9.Nd2+ Kd4 10.Kb3 Nh4 11.gxh4 a5 12.Nf3+
[d]7n/2B1p3/R2p3p/1p1Pk2N/4Pb2/2pP3b/P1PRN1n1/K7 w - -
Black-Diamond-XR7: +M12 1.Rxd6 exd6 2.Bd8 Bg5 3.Nf6 Be3 4.Ne8 Bg5 5.Ba5 Bxd2 6.Bd8 Bg5 7.Nf6 Be3 8.Nh5 Bg5 9.Bb6 Be3 10.Nd4 Bxd4 11.Bd8 b4 12.Bf6+
[d]6B1/1p2p3/p2pp1pK/N3k3/1R4p1/8/1pP4n/4N3 w - -
Black-Diamond-XR7: +M12 1.Nd3+ Kd5 2.c3 Nf3 3.Nf4+ Ke5 4.Nxg6+ Kd5 5.Nf4+ Ke5 6.Nd3+ Kd5 7.Bh7 e5 8.Bg8+ e6 9.Bh7 Nd2 10.Be4+ Nxe4 11.Rd4+ exd4 12.c4+
[d]N7/pp6/1b6/1p1p4/1BkP4/KpPN2Q1/p3q3/rb6 w - -
Black-Diamond-XR7: +M12 1.Nxb6+ axb6 2.Qh3 Qh2 3.Qf5 Qe2 4.Qh7 Qh2 5.Qh3 Qe2 6.Qg3 b2 7.Qh3 Qh2 8.Qf5 Qe2 9.Qh7 Qh2 10.Qh3 Bxd3 11.Qc8+ Qc7 12.Qxc7+
[d]2N5/1pp5/1b6/1p1p4/1BkP4/KpPN2Q1/p3q3/rb6 w - -
Black-Diamond-XR7: +M12 1.Nxb6+ cxb6 2.Qh3 Qh2 3.Qf5 Qe2 4.Qh7 Qh2 5.Qh3 Qe2 6.Qg3 b2 7.Qh3 Qh2 8.Qf5 Qe2 9.Qh7 Qh2 10.Qh3 Bxd3 11.Qc8+ Qc7 12.Qxc7+
[d]7N/5pp1/6b1/4p1p1/4PkB1/1Q2NPpK/3q3p/6br w - -
Crystal 2.0: +M12 1.Nxg6+ fxg6 2.Qa3 Qa2 3.Qc5 Qd2 4.Qa7 Qa2 5.Qa3 Qd2 6.Qb3 g2 7.Qa3 Qa2 8.Qc5 Qd2 9.Qa7 Qa2 10.Qa3 Qd2 11.Qb3 Qf2 12.Nd5+
[d]8/5p2/5N2/8/K3nN1p/1p3k2/1Pp2prR/n1B2bbB w - -
Black-Diamond-XR7: +M12 1.Rh3+ Ng3 2.Ka5 Bh2 3.Kb6 Bg1 4.Kc7 Bh2 5.Kd8 Bg1 6.Ke7 Bh2 7.Kf8 Bg1 8.Kg7 Bh2 9.Kh6 Bg1 10.Kg5 Bh2 11.Kxh4 Bg1 12.Rxg3+
[d]5b2/p5p1/4p1P1/1p2Rn1p/1P1k1PRn/PK6/3NP1P1/8 w - -
Black-Diamond-XR7: +M12 1.Rxh4 Nxh4 2.Kc2 Nf5 3.Nb3+ Kc4 4.Na5+ Kd4 5.Kb3 Ne7 6.g3 a6 7.Kc2 Nf5 8.Nb3+ Kc4 9.Nd2+ Kd4 10.Kb3 Nh4 11.gxh4 a5 12.Nf3+
[d]7n/2B1p3/R2p3p/1p1Pk2N/4Pb2/2pP3b/P1PRN1n1/K7 w - -
Black-Diamond-XR7: +M12 1.Rxd6 exd6 2.Bd8 Bg5 3.Nf6 Be3 4.Ne8 Bg5 5.Ba5 Bxd2 6.Bd8 Bg5 7.Nf6 Be3 8.Nh5 Bg5 9.Bb6 Be3 10.Nd4 Bxd4 11.Bd8 b4 12.Bf6+
[d]6B1/1p2p3/p2pp1pK/N3k3/1R4p1/8/1pP4n/4N3 w - -
Black-Diamond-XR7: +M12 1.Nd3+ Kd5 2.c3 Nf3 3.Nf4+ Ke5 4.Nxg6+ Kd5 5.Nf4+ Ke5 6.Nd3+ Kd5 7.Bh7 e5 8.Bg8+ e6 9.Bh7 Nd2 10.Be4+ Nxe4 11.Rd4+ exd4 12.c4+
[d]N7/pp6/1b6/1p1p4/1BkP4/KpPN2Q1/p3q3/rb6 w - -
Black-Diamond-XR7: +M12 1.Nxb6+ axb6 2.Qh3 Qh2 3.Qf5 Qe2 4.Qh7 Qh2 5.Qh3 Qe2 6.Qg3 b2 7.Qh3 Qh2 8.Qf5 Qe2 9.Qh7 Qh2 10.Qh3 Bxd3 11.Qc8+ Qc7 12.Qxc7+
[d]2N5/1pp5/1b6/1p1p4/1BkP4/KpPN2Q1/p3q3/rb6 w - -
Black-Diamond-XR7: +M12 1.Nxb6+ cxb6 2.Qh3 Qh2 3.Qf5 Qe2 4.Qh7 Qh2 5.Qh3 Qe2 6.Qg3 b2 7.Qh3 Qh2 8.Qf5 Qe2 9.Qh7 Qh2 10.Qh3 Bxd3 11.Qc8+ Qc7 12.Qxc7+
[d]7N/5pp1/6b1/4p1p1/4PkB1/1Q2NPpK/3q3p/6br w - -
Crystal 2.0: +M12 1.Nxg6+ fxg6 2.Qa3 Qa2 3.Qc5 Qd2 4.Qa7 Qa2 5.Qa3 Qd2 6.Qb3 g2 7.Qa3 Qa2 8.Qc5 Qd2 9.Qa7 Qa2 10.Qa3 Qd2 11.Qb3 Qf2 12.Nd5+
i7-6700K @ 4.00Ghz 32Gb, Win 10 Home, EGTBs on PCI SSD
Benchmark: Stockfish15.1 NNUE x64 bmi2 (nps): 1277K
Benchmark: Stockfish15.1 NNUE x64 bmi2 (nps): 1277K