Chess Engine Puzzle (High Difficulty)

Discussion of anything and everything relating to chess playing software and machines.

Moderators: hgm, Rebel, chrisw

User avatar
Nathanael Russell
Posts: 803
Joined: Sat Jan 31, 2015 11:50 pm
Location: Philadelphia, USA

Re: Chess Engine Puzzle (High Difficulty)

Post by Nathanael Russell »

8/3P3k/n2K3p/2p3n1/1b4N1/2p1p1P1/8/3B4 w - - 0 1
4th Generation Intel Core i7-4940MX (4.2GHz)

Code: Select all

Analysis by Komodo 9.2 64-bit:

1.Ng4-f6+ Kh7-g7 2.Nf6-h5+ Kg7-g6 3.Nh5-f4+ Kg6-f5 4.Bd1-c2+ Kf5-g4 5.Bc2-d1+ Kg4-f5 
  =  (0.00)   Depth: 7   00:00:00  14kN
1.Ng4-f6+ Kh7-g7 2.Nf6-h5+ Kg7-g6 3.Nh5-f4+ Kg6-f5 4.Bd1-c2+ Kf5-g4 5.Bc2-d1+ Kg4xg3 6.Nf4-e2+ Kg3-g4 7.Ne2-g1+ Kg4-g3 8.Ng1-e2+ 
  =  (0.00)   Depth: 8   00:00:00  94kN
1.Ng4-f6+ Kh7-g7 
  =  (-0.07 --)   Depth: 9   00:00:00  163kN
1.Ng4-f6+ Kh7-g7 
  =  (-0.14 --)   Depth: 9   00:00:00  184kN
1.Ng4-f6+ Kh7-g7 
  =  (-0.24 --)   Depth: 9   00:00:00  199kN
1.Ng4-f6+ Kh7-g7 
  =/+  (-0.40 --)   Depth: 9   00:00:00  216kN
1.Ng4-f6+ Kh7-g7 
  =/+  (-0.67 --)   Depth: 9   00:00:00  232kN
1.Ng4-f6+ Kh7-g7 2.Nf6-h5+ Kg7-g6 3.Nh5-f4+ Kg6-f5 4.Bd1-c2+ Kf5-g4 5.Bc2-d1+ e3-e2 6.Bd1xe2+ Kg4xg3 7.Be2-c4 Bb4-a5 8.Nf4-e2+ Kg3-g4 9.Bc4xa6 c3-c2 10.Ba6-d3 
  -/+  (-0.86)   Depth: 9   00:00:00  249kN
1.Ng4-f6+ 
  -/+  (-0.79 ++)   Depth: 10   00:00:00  269kN
1.Ng4-f6+ Kh7-g7 
  -/+  (-0.86 --)   Depth: 10   00:00:00  275kN
1.Ng4-f6+ Kh7-g7 
  -/+  (-0.96 --)   Depth: 10   00:00:00  277kN
1.Ng4-f6+ Kh7-g7 
  -/+  (-1.11 --)   Depth: 10   00:00:00  282kN
1.Ng4-f6+ Kh7-g7 
  -/+  (-1.33 --)   Depth: 10   00:00:00  291kN
1.Ng4-f6+ Kh7-g7 
  -+  (-1.69 --)   Depth: 10   00:00:00  322kN
1.Bd1-c2+ Kh7-g7 
  -+  (-1.66 --)   Depth: 10   00:00:00  323kN
1.Bd1-c2+ Kh7-g7 2.Ng4xe3 Ng5-f7+ 3.Kd6-c6 Nf7-d8+ 4.Kc6-b6 Na6-b8 5.Kb6-c7 Nb8-c6 6.Ne3-f5+ Kg7-f7 7.Nf5xh6+ Kf7-e6 8.Bc2-f5+ Ke6-f6 9.Bf5-c2 c5-c4 
  -+  (-1.99)   Depth: 10   00:00:00  410kN
1.Ng4xe3 Bb4-a5 2.Bd1-e2 Na6-b8 3.Kd6-e7 Kh7-g7 4.Ne3-f5+ Kg7-g8 5.Be2-d1 Nb8-c6+ 6.Ke7-d6 Nc6-b4 7.Bd1-b3+ Kg8-f8 8.Kd6xc5 
  -+  (-1.70)   Depth: 10   00:00:00  471kN
1.Ng4xe3 Bb4-a5 
  -+  (-1.77 --)   Depth: 11   00:00:00  500kN, tb=1
1.Ng4xe3 Bb4-a5 
  -+  (-1.84 --)   Depth: 11   00:00:00  557kN, tb=1
1.Ng4xe3 
  -+  (-1.77 ++)   Depth: 11   00:00:00  644kN, tb=7
1.Ng4xe3 Bb4-a5 2.Bd1-e2 Na6-b8 3.Be2-d3+ Kh7-g7 4.Bd3-f5 Kg7-f6 5.Kd6xc5 Ng5-f7 6.Bf5-h3 Nf7-d8 7.Kc5-c4 Kf6-e5 
  -+  (-1.71)   Depth: 11   00:00:00  671kN, tb=7
1.Ng4xe3 Bb4-a5 
  -+  (-1.78 --)   Depth: 12   00:00:00  707kN, tb=8
1.Ng4xe3 Bb4-a5 
  -+  (-1.85 --)   Depth: 12   00:00:00  730kN, tb=9
1.Ng4xe3 Bb4-a5 2.Kd6-c6 Na6-b8+ 3.Kc6-b5 Ba5-d8 4.Bd1-g4 Kh7-g6 5.Kb5xc5 Ng5-f7 6.Bg4-h3 Nf7-e5 7.Bh3-f5+ Kg6-g5 8.Kc5-b4 Nb8xd7 
  -+  (-1.86)   Depth: 12   00:00:00  771kN, tb=12
1.Ng4xe3 Bb4-a5 2.Bd1-e2 Na6-b8 3.Be2-d3+ Kh7-g7 4.Ne3-f5+ Kg7-g6 5.Nf5-e3+ Kg6-f7 6.Bd3-f5 Kf7-f6 7.Kd6xc5 Ng5-f7 8.Bf5-h3 Nf7-e5 9.d7-d8Q+ Ba5xd8 10.Ne3-d5+ Kf6-g6 11.Nd5xc3 Nb8-c6 
  -+  (-1.85)   Depth: 13   00:00:00  953kN, tb=36
1.Ng4xe3 Bb4-a5 
  -+  (-1.92 --)   Depth: 14   00:00:00  1204kN, tb=107
1.Ng4xe3 Bb4-a5 2.Bd1-e2 Na6-b8 3.Be2-d3+ Kh7-g7 4.Ne3-f5+ Kg7-g6 5.Nf5-e3+ Kg6-f7 6.Bd3-f5 Kf7-f6 7.Kd6xc5 Kf6-e5 8.Bf5-c2 Ba5-c7 9.Kc5-c4 Nb8xd7 10.Ne3-g4+ Ke5-e6 11.Kc4xc3 
  -+  (-1.87)   Depth: 14   00:00:00  1299kN, tb=120
1.Ng4xe3 Bb4-a5 
  -+  (-1.94 --)   Depth: 15   00:00:00  1501kN, tb=246
1.Ng4xe3 Bb4-a5 
  -+  (-2.01 --)   Depth: 15   00:00:00  2002kN, tb=852
1.d7-d8Q 
  -+  (-1.87 ++)   Depth: 15   00:00:00  2331kN, tb=1487
1.d7-d8Q 
  -+  (-1.77 ++)   Depth: 15   00:00:00  2478kN, tb=2030
1.d7-d8Q 
  -+  (-1.62 ++)   Depth: 15   00:00:00  2652kN, tb=2359
1.d7-d8Q Ng5-f7+ 2.Kd6-e7 Nf7xd8 3.Ke7xd8 e3-e2 4.Bd1xe2 Bb4-a5+ 5.Kd8-d7 Na6-b4 6.Ng4-e3 Ba5-b6 7.Be2-d1 c5-c4 8.Ne3-c2 Nb4-d3 9.Nc2-a3 Bb6-c5 10.Na3-b5 Bc5-b4 11.Nb5-d6 Bb4xd6 12.Kd7xd6 
  -+  (-1.69)   Depth: 15   00:00:00  2737kN, tb=2531
1.d7-d8Q 
  -+  (-1.62 ++)   Depth: 16   00:00:00  2884kN, tb=2801
1.d7-d8Q 
  -/+  (-1.55 ++)   Depth: 16   00:00:00  2987kN, tb=3108
1.d7-d8Q Ng5-f7+ 
  -+  (-1.62 --)   Depth: 16   00:00:00  3049kN, tb=3241
1.d7-d8Q Ng5-f7+ 
  -+  (-1.77 --)   Depth: 16   00:00:00  3482kN, tb=3663
1.d7-d8Q 
  -+  (-1.65 ++)   Depth: 16   00:00:00  3650kN, tb=4125
1.d7-d8Q Ng5-f7+ 2.Kd6-e7 Nf7xd8 3.Ke7xd8 e3-e2 4.Bd1xe2 Bb4-a5+ 5.Kd8-d7 Na6-b4 6.Ng4-e3 Ba5-b6 7.Be2-d1 Kh7-g6 8.Kd7-d6 Bb6-a7 9.Ne3-c2 Nb4-d3 10.Kd6-c6 Ba7-b8 11.Bd1-e2 Nd3-b2 12.g3-g4 Nb2-a4 13.Kc6-d5 
  -/+  (-1.56)   Depth: 16   00:00:00  3754kN, tb=4493
1.d7-d8Q 
  -/+  (-1.49 ++)   Depth: 17   00:00:00  4051kN, tb=5540
1.d7-d8Q Ng5-f7+ 
  -/+  (-1.56 --)   Depth: 17   00:00:00  4262kN, tb=6604
1.d7-d8Q Ng5-f7+ 
  -+  (-1.66 --)   Depth: 17   00:00:00  4510kN, tb=7294
1.d7-d8Q Ng5-f7+ 
  -+  (-1.81 --)   Depth: 17   00:00:00  4904kN, tb=9835
1.d7-d8Q Ng5-f7+ 
  -+  (-2.03 --)   Depth: 17   00:00:00  5355kN, tb=11174
1.d7-d8Q Ng5-f7+ 2.Kd6-e7 Nf7xd8 3.Ke7xd8 Bb4-a5+ 4.Kd8-d7 Ba5-c7 5.Ng4xe3 Bc7xg3 6.Kd7-c6 Kh7-g6 7.Kc6-b5 Na6-c7+ 8.Kb5-c4 h6-h5 9.Kc4xc3 Bg3-f2 10.Ne3-c4 h5-h4 11.Bd1-g4 Kg6-g5 12.Bg4-d7 Bf2-d4+ 13.Kc3-d3 Nc7-d5 14.Nc4-d6 Nd5-e3 
  -+  (-2.02)   Depth: 17   00:00:00  6017kN, tb=13781
1.d7-d8Q Ng5-f7+ 
  -+  (-2.09 --)   Depth: 18   00:00:00  6311kN, tb=15840
1.d7-d8Q Ng5-f7+ 
  -+  (-2.16 --)   Depth: 18   00:00:01  10136kN, tb=27033
1.d7-d8Q Ng5-f7+ 
  -+  (-2.26 --)   Depth: 18   00:00:01  12282kN, tb=35097
1.d7-d8R Ng5-f7+ 2.Kd6-e7 Nf7xd8 3.Ke7xd8 Bb4-a5+ 4.Kd8-d7 Ba5-c7 5.Ng4xe3 Bc7xg3 6.Kd7-c6 Kh7-g6 7.Kc6-b5 Na6-c7+ 8.Kb5-c4 h6-h5 9.Kc4xc3 Bg3-f2 10.Ne3-c4 h5-h4 11.Bd1-g4 Kg6-g5 12.Bg4-c8 Nc7-d5+ 13.Kc3-d3 Kg5-f4 14.Nc4-d6 Bf2-d4 15.Bc8-h3 Kf4-f3 16.Bh3-f5 Nd5-f4+ 17.Kd3-c4 h4-h3 18.Bf5-e4+ 
  -+  (-2.15)   Depth: 18   00:00:02  23488kN, tb=47004
1.d7-d8R 
  -+  (-2.08 ++)   Depth: 19   00:00:02  23493kN, tb=47005
1.d7-d8R Ng5-f7+ 2.Kd6-e7 Nf7xd8 3.Ke7xd8 Bb4-a5+ 4.Kd8-d7 Ba5-c7 5.Ng4xe3 Bc7xg3 6.Kd7-c6 Kh7-g6 7.Kc6-b5 Na6-b4 
  -+  (-2.05)   Depth: 19   00:00:02  23496kN, tb=47007
1.d7-d8R Ng5-f7+ 
  -+  (-2.13 --)   Depth: 20   00:00:02  24490kN, tb=52036
1.Ng4xe3 Bb4-a5 
  -+  (-2.12 --)   Depth: 20   00:00:02  26253kN, tb=59560
1.Ng4xe3 Bb4-a5 
  -+  (-2.19 --)   Depth: 20   00:00:02  28984kN, tb=68324
1.Ng4xe3 Bb4-a5 
  -+  (-2.29 --)   Depth: 20   00:00:03  34117kN, tb=95172
1.Ng4xe3 Bb4-a5 
  -+  (-2.44 --)   Depth: 20   00:00:04  46769kN, tb=137040
1.Kd6-c6 
  -+  (-2.20 ++)   Depth: 20   00:00:05  49275kN, tb=144187
1.Kd6-c6 Na6-b8+ 
  -+  (-2.32 --)   Depth: 20   00:00:05  49748kN, tb=145437
1.Kd6-c6 Na6-b8+ 2.Kc6-c7 Nb8xd7 3.Kc7xd7 e3-e2 4.Bd1xe2 Kh7-g7 5.Be2-d1 Ng5-e4 6.Kd7-e6 Ne4xg3 7.Ke6-e5 Bb4-a5 8.Ke5-f4 Ng3-e2+ 9.Kf4-e4 Ne2-d4 10.Ng4-e3 Kg7-g6 11.Ne3-c2 Nd4-b5 12.Ke4-d5 Ba5-b4 13.Bd1-e2 Nb5-c7+ 14.Kd5-c4 Kg6-f6 15.Be2-f3 Kf6-e5 16.Nc2-e1 Ke5-f4 
  -+  (-2.39)   Depth: 20   00:00:05  50061kN, tb=145974
1.Kd6-c6 Na6-b8+ 
  -+  (-2.46 --)   Depth: 21   00:00:05  50882kN, tb=148898
1.Kd6-c6 Na6-b8+ 
  -+  (-2.53 --)   Depth: 21   00:00:05  53100kN, tb=156946
1.Kd6-c6 Na6-b8+ 2.Kc6-c7 Nb8xd7 3.Kc7xd7 e3-e2 4.Bd1xe2 Kh7-g7 5.Be2-d1 Ng5-e4 6.Kd7-e6 Ne4xg3 7.Ke6-e5 Bb4-a5 8.Ng4-e3 Kg7-g6 9.Ke5-f4 Ng3-h5+ 10.Kf4-e5 Kg6-g5 11.Ke5-d5 Ba5-b4 12.Kd5-c4 Nh5-f6 13.Ne3-d5 Nf6xd5 14.Kc4xd5 h6-h5 15.Kd5-c6 h5-h4 
  -+  (-2.49)   Depth: 21   00:00:07  79612kN, tb=199797
1.Kd6-c6 
  -+  (-2.42 ++)   Depth: 22   00:00:07  80790kN, tb=206067
1.Kd6-c6 
  -+  (-2.35 ++)   Depth: 22   00:00:07  81674kN, tb=209750
1.Kd6-c6 Na6-b8+ 
  -+  (-2.42 --)   Depth: 22   00:00:07  82452kN, tb=214081
1.Kd6-c6 Na6-b8+ 
  -+  (-2.57 --)   Depth: 22   00:00:07  84889kN, tb=224542
1.Ng4xe3 
  -+  (-2.33 ++)   Depth: 22   00:00:09  101mN, tb=321900
1.Ng4xe3 Bb4-a5 
  -+  (-2.45 --)   Depth: 22   00:00:09  103mN, tb=329407
1.Ng4xe3 Bb4-a5 2.Bd1-e2 Na6-b8 3.Be2-d3+ Kh7-g7 4.Ne3-f5+ Kg7-f8 5.Kd6xc5 Nb8xd7+ 6.Kc5-b5 Ba5-d8 7.Nf5xh6 Ng5-f3 8.Kb5-b4 Bd8-f6 9.Nh6-g4 Bf6-d4 10.Bd3-f5 Kf8-e7 11.Kb4-b3 Ke7-d6 12.Kb3-c2 Nd7-c5 13.Kc2-d1 Nf3-d2 14.Bf5-h7 Nd2-e4 15.Kd1-c2 Ne4xg3 16.Bh7-g6 Ng3-e4 
  -+  (-2.57)   Depth: 22   00:00:11  129mN, tb=386869
1.Kd6-c6 Na6-b8+ 2.Kc6-c7 Nb8xd7 3.Kc7xd7 e3-e2 4.Bd1xe2 Kh7-g7 5.Be2-d1 Ng5-e4 6.Kd7-e6 Ne4xg3 7.Ke6-e5 h6-h5 8.Ng4-e3 h5-h4 9.Ke5-f4 Kg7-f6 10.Ne3-d5+ Kf6-e6 11.Nd5-e3 c5-c4 12.Ne3xc4 Bb4-c5 13.Kf4-g4 Ng3-f5 14.Bd1-c2 Nf5-d4 15.Bc2-e4 Bc5-e7 16.Nc4-e3 Ke6-e5 17.Be4-d3 Nd4-c6 18.Ne3-c2 Be7-f6 19.Kg4-f3 Nc6-e7 20.Bd3-f1 Ne7-f5 21.Bf1-h3 
  -+  (-2.52)   Depth: 22   00:00:11  129mN, tb=386874
1.Kd6-c6 Na6-b8+ 2.Kc6-c7 Nb8xd7 3.Kc7xd7 e3-e2 4.Bd1xe2 Kh7-g7 5.Be2-d1 Ng5-e4 6.Kd7-e6 Ne4xg3 7.Ke6-e5 h6-h5 8.Ng4-e3 h5-h4 9.Ke5-f4 Kg7-f6 10.Ne3-d5+ Kf6-e6 11.Nd5-e3 c5-c4 12.Ne3xc4 Bb4-c5 13.Kf4-g4 Ng3-f5 14.Bd1-c2 Nf5-d4 15.Bc2-e4 Bc5-e7 16.Nc4-e3 Ke6-e5 17.Be4-d3 Nd4-c6 18.Ne3-c2 Be7-f6 19.Kg4-f3 Nc6-e7 20.Bd3-f1 Ne7-f5 
  -+  (-2.52)   Depth: 23   00:00:11  130mN, tb=389832
1.Kd6-c6 Na6-b8+ 2.Kc6-c7 Nb8xd7 3.Kc7xd7 e3-e2 4.Bd1xe2 Kh7-g7 5.Be2-d1 Ng5-e4 6.Kd7-e6 Ne4xg3 7.Ke6-e5 h6-h5 8.Ng4-e3 h5-h4 9.Ke5-f4 Kg7-f6 10.Ne3-d5+ Kf6-e6 11.Nd5-e3 c5-c4 12.Ne3xc4 Bb4-c5 13.Kf4-g4 Ng3-f5 14.Bd1-c2 Nf5-d4 15.Bc2-e4 Bc5-e7 16.Nc4-e3 Ke6-e5 17.Be4-d3 Nd4-c6 18.Ne3-c2 Be7-f6 19.Kg4-f3 Nc6-e7 20.Bd3-f1 Ne7-f5 21.Bf1-h3 Bf6-g5 
  -+  (-2.52)   Depth: 24   00:00:12  137mN, tb=424546
1.Kd6-c6 Na6-b8+ 
  -+  (-2.59 --)   Depth: 25   00:00:13  147mN, tb=487399
1.Kd6-c6 Na6-b8+ 
  -+  (-2.66 --)   Depth: 25   00:00:18  195mN, tb=743091
1.Ng4xe3 Bb4-a5 2.Kd6-c6 Ba5-d8 3.Kc6-b5 Na6-b8 4.Bd1-c2+ Kh7-g7 5.Ne3-f5+ Kg7-g6 6.Kb5xc5 Nb8xd7+ 7.Kc5-c4 Bd8-f6 8.Nf5-d6+ Kg6-g7 9.Nd6-f5+ Kg7-f7 10.Nf5xh6+ Kf7-e6 11.Bc2-b3 Ng5-f3 12.Nh6-g4 Bf6-g7 13.Kc4-b4+ Ke6-f5 14.Ng4-f2 Nf3-e1 15.Nf2-d1 Ne1-d3+ 16.Kb4-c4 Nd3-b2+ 17.Kc4-b4 Nb2xd1 18.Bb3xd1 Kf5-e4 19.Kb4-c4 Bg7-e5 20.g3-g4 Ke4-f4 21.Kc4-d3 Nd7-c5+ 22.Kd3-c2 Nc5-e4 
  -+  (-2.59)   Depth: 25   00:00:19  204mN, tb=779257
1.Ng4xe3 Bb4-a5 2.Kd6-c6 Ba5-d8 3.Kc6-b5 Na6-b8 4.Bd1-c2+ Kh7-g7 5.Ne3-f5+ Kg7-g6 6.Kb5xc5 Nb8xd7+ 7.Kc5-b4 Bd8-f6 8.Nf5-d6+ Kg6-g7 9.Nd6-f5+ Kg7-f8 10.Nf5xh6 Ng5-f3 11.Kb4-b3 Nf3-d4+ 12.Kb3xc3 Nd4-f5+ 13.Kc3-d3 Nf5xh6 14.Kd3-e4 Kf8-e7 15.Bc2-d1 Nh6-f7 16.g3-g4 Nd7-c5+ 17.Ke4-f5 Nc5-d3 18.Kf5-g6 Nd3-f2 19.Bd1-e2 Nf2-e4 20.Be2-d1 Bf6-d4 21.Bd1-b3 Nf7-e5+ 22.Kg6-f5 Ne4-d6+ 23.Kf5-g5 
  -+  (-2.64)   Depth: 26   00:00:24  260mN, tb=979985
1.Kd6-c6 Na6-b8+ 2.Kc6-c7 Nb8xd7 3.Kc7xd7 e3-e2 4.Bd1xe2 Kh7-g7 5.Be2-d1 Ng5-e4 6.Kd7-e6 Ne4xg3 7.Ke6-e5 Bb4-a5 8.Ke5-f4 Ng3-e2+ 9.Kf4-e4 Ne2-d4 10.Ng4-e3 Kg7-g6 11.Ne3-c2 Nd4-b5 12.Bd1-e2 Nb5-c7 13.Ke4-e5 h6-h5 14.Ke5-d6 h5-h4 15.Be2-f1 Kg6-g5 16.Kd6xc5 Nc7-e6+ 17.Kc5-b5 Ba5-c7 18.Kb5-c4 Bc7-e5 19.Kc4-d5 Kg5-f6 20.Nc2-e3 Be5-f4 21.Ne3-c2 Bf4-d2 22.Kd5-e4 h4-h3 
  -+  (-2.62)   Depth: 26   00:00:24  261mN, tb=984519
1.Kd6-c6 Na6-b8+ 2.Kc6-c7 Nb8xd7 3.Kc7xd7 e3-e2 4.Bd1xe2 Kh7-g7 5.Be2-d1 Ng5-e4 6.Kd7-e6 Ne4xg3 7.Ke6-e5 Bb4-a5 8.Ke5-f4 Ng3-e2+ 9.Kf4-e4 Ne2-d4 10.Ng4-e3 Kg7-g6 11.Ne3-c2 Nd4-b5 12.Bd1-e2 Nb5-c7 13.Ke4-e5 h6-h5 14.Ke5-d6 h5-h4 15.Be2-f1 Kg6-g5 16.Kd6xc5 Nc7-e6+ 17.Kc5-b5 Ba5-c7 18.Kb5-c4 Bc7-e5 19.Kc4-d5 Kg5-f6 20.Nc2-e3 Be5-f4 21.Ne3-c2 Bf4-d2 22.Kd5-e4 h4-h3 
  -+  (-2.62)   Depth: 27   00:00:25  267mN, tb=1020367
1.Kd6-c6 Na6-b8+ 
  -+  (-2.69 --)   Depth: 28   00:00:27  282mN, tb=1114570
1.Kd6-c6 Na6-b8+ 
  -+  (-2.76 --)   Depth: 28   00:00:37  371mN, tb=1634358
1.Kd6-c6 Na6-b8+ 
  -+  (-2.86 --)   Depth: 28   00:00:48  474mN, tb=2393742
1.Kd6-c6 Na6-b8+ 
  -+  (-3.01 --)   Depth: 28   00:01:00  585mN, tb=3245755
1.Ng4xe3 Bb4-a5 2.Kd6-c6 Ba5-d8 3.Bd1-c2+ Kh7-g7 4.Kc6-b5 Na6-b8 5.Kb5xc5 Nb8xd7+ 6.Kc5-c4 Bd8-f6 7.Ne3-f5+ Kg7-f7 8.Nf5xh6+ Kf7-e6 9.Kc4-b4 Ng5-f3 10.Bc2-b3+ Ke6-d6 11.g3-g4 Nd7-c5 12.Nh6-f5+ Kd6-c6 13.Bb3-c2 Nf3-e1 14.Nf5-e3 Bf6-d4 15.Bc2-g6 Ne1-d3+ 16.Kb4-c4 Bd4xe3 17.Kc4xc3 Nd3-e5 18.Bg6-f5 Be3-g5 19.Kc3-b4 Bg5-d2+ 20.Kb4-a3 Kc6-d5 21.Ka3-b2 Nc5-e4 22.Kb2-c2 Bd2-e1 
  -+  (-3.00)   Depth: 28   00:01:17  734mN, tb=4328730
1.Ng4xe3 Bb4-a5 2.Kd6-c6 Ba5-d8 3.Bd1-c2+ Kh7-g7 4.Kc6-b5 Na6-b8 5.Kb5xc5 Nb8xd7+ 6.Kc5-c4 Bd8-f6 7.Ne3-f5+ Kg7-f7 8.Nf5xh6+ Kf7-e6 9.Bc2-b3 Ng5-e4 10.Nh6-g4 Bf6-g7 11.Kc4-b4+ Ke6-d6 12.Ng4-e3 Ne4xg3 13.Kb4-c4 Nd7-c5 14.Bb3-c2 Bg7-h8 15.Bc2-d1 Ng3-e4 16.Ne3-f5+ Kd6-e5 17.Nf5-e7 Ke5-e6 18.Ne7-d5 Bh8-g7 19.Nd5-e3 Ke6-e5 20.Ne3-d5 Ke5-d6 
  -+  (-3.02)   Depth: 29   00:01:23  793mN, tb=4684708
1.Ng4xe3 Bb4-a5 2.Kd6-c6 Ba5-d8 3.Bd1-c2+ Kh7-g7 4.Kc6-b5 Na6-b8 5.Kb5xc5 Nb8xd7+ 6.Kc5-c4 Bd8-f6 7.Ne3-f5+ Kg7-f7 8.Nf5xh6+ Kf7-e6 9.Bc2-b3 Ng5-e4 10.Nh6-g4 Bf6-g7 11.Kc4-b5+ Ke6-d6 12.Ng4-e3 Nd7-c5 13.Bb3-c2 Ne4xg3 14.Kb5-c4 Bg7-e5 15.Bc2-d1 Nc5-e4 16.Bd1-a4 Be5-g7 17.Ba4-c2 Kd6-e6 18.Ne3-g2 Ne4-d2+ 19.Kc4-d3 Ng3-e4 20.Ng2-f4+ Ke6-d6 21.Kd3-e3 Ne4-c5 22.Bc2-g6 
  -+  (-3.03)   Depth: 30   00:01:48  1015mN, tb=6250645
1.Ng4xe3 Bb4-a5 
  -+  (-3.10 --)   Depth: 31   00:02:08  1201mN, tb=7824163
1.Ng4xe3 
  -+  (-3.03 ++)   Depth: 31   00:02:14  1251mN, tb=8144507
1.Ng4xe3 Bb4-a5 
  -+  (-3.10 --)   Depth: 31   00:02:21  1323mN, tb=8663021
1.Ng4xe3 Bb4-a5 2.Kd6-c6 Ba5-d8 3.Kc6-b5 Na6-b8 4.Bd1-c2+ Kh7-g7 5.Kb5xc5 Nb8xd7+ 6.Kc5-c4 Bd8-f6 7.Ne3-f5+ Kg7-f7 8.Nf5xh6+ Kf7-e6 9.Kc4-d3 Nd7-c5+ 10.Kd3-c4 Nc5-e4 11.Nh6-g4 Bf6-g7 12.Ng4-e3 Ne4xg3 13.Kc4-d3 Ng5-f3 14.Ne3-g2 Nf3-d2 15.Bc2-d1 Nd2-e4 16.Bd1-c2 Ke6-d6 17.Kd3-c4 Ne4-d2+ 18.Kc4-d3 Ng3-e4 19.Kd3-e3 Ne4-c5 20.Ke3-e2 Nd2-c4 21.Bc2-f5 Bg7-d4 22.Bf5-c2 Kd6-e5 
  -+  (-3.18)   Depth: 31   00:02:46  1541mN, tb=9973445
1.Ng4xe3 Bb4-a5 
  -+  (-3.25 --)   Depth: 32   00:03:29  1938mN, tb=12667121
1.Ng4-f6+ 
  -+  (-3.11 ++)   Depth: 32   00:03:41  2044mN, tb=13357107
1.Ng4-f6+ 
  -+  (-3.04 ++)   Depth: 32   00:03:45  2078mN, tb=13703151
1.Ng4-f6+ 
  -+  (-2.94 ++)   Depth: 32   00:03:46  2094mN, tb=13792726
1.Ng4-f6+ 
  -+  (-2.79 ++)   Depth: 32   00:03:48  2111mN, tb=13931063
1.Ng4-f6+ 
  -+  (-2.57 ++)   Depth: 32   00:03:51  2136mN, tb=14110795
1.Ng4-f6+ 
  -+  (-2.24 ++)   Depth: 32   00:03:56  2179mN, tb=14464405
1.Ng4-f6+ 
  -+  (-1.75 ++)   Depth: 32   00:04:04  2259mN, tb=15105551
1.Ng4-f6+ 
  -/+  (-1.02 ++)   Depth: 32   00:04:11  2314mN, tb=15595359
1.Ng4-f6+ 
  =  (0.07 ++)   Depth: 32   00:04:22  2410mN, tb=16542188
1.Ng4-f6+ 
  +-  (1.70 ++)   Depth: 32   00:04:30  2480mN, tb=17310912
1.Ng4-f6+ Kh7-g7 2.Nf6-h5+ Kg7-g6 3.Bd1-c2+ Kg6xh5 4.d7-d8Q Kh5-g4 5.Qd8-e8 c5-c4+ 6.Kd6-c6 Bb4-a3 7.Bc2-d1+ Kg4-h3 8.Qe8xe3 Na6-b4+ 9.Kc6-b5 Nb4-d3 10.Qe3-d4 Kh3-g2 11.Qd4xc3 Nd3-f2 12.Qc3xc4 Ba3-b2 13.Qc4-d5+ Kg2-g1 14.Bd1-c2 Bb2-c3 15.Bc2-f5 Bc3-e1 16.Qd5-c4 Be1-d2 17.Bf5-g6 Ng5-h3 18.Qc4-e2 Bd2-c3 19.Qe2-e3 Bc3-g7 20.Bg6-f5 Nh3-g5 21.Qe3-c1+ Kg1-h2 22.Qc1-c5 Kh2-g1 23.Qc5-c6 Nf2-h1 24.g3-g4 Nh1-f2 25.Qc6-c7 Bg7-f8 26.Qc7-g3+ Kg1-f1 
  +-  (3.59)   Depth: 32   00:05:16  2886mN, tb=23194188

(Russell, Philadelphia 22.09.2015)
Core_Engine_Tester_CCRL
Image
Top
zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Chess Engine Puzzle (High Difficulty)

Post by zullil »

Nathanael Russell wrote: White to play and draw.
[D]8/2B2k2/6p1/5P1p/6p1/p1p3PP/6P1/1n2K2R w - - 0 1
Top
Ignacio
Posts: 177
Joined: Wed Mar 08, 2006 8:15 pm

Re: Chess Engine Puzzle (High Difficulty)

Post by Ignacio »

Draw?. I don´t think so.
Top
zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Chess Engine Puzzle (High Difficulty)

Post by zullil »

Ignacio wrote:Draw?. I don´t think so.
Neither does Stockfish:

Code: Select all

info depth 47 seldepth 79 multipv 1 score cp -6755 nodes 210455042553 nps 45781033 hashfull 999 tbhits 0 time 4596992 pv c7e5 a3a2 e5c3 b1c3 e1d2 c3b1 d2c2 a2a1q h1b1 a1a8 h3g4 a8g2 c2d1 h5g4 f5g6 f7g6 b1b6 g6f5 b6b3 g2d5 d1c2 d5b3 c2b3 f5e4 b3c2 e4f3 c2d2 f3g3 d2e3 g3h3 e3e4 g4g3 e4f3 g3g2 f3f2 h3h2 f2f3 g2g1q f3e4 h2g3 e4f5 g3h4 f5f6 h4h5 f6e7 g1e3 e7f7 e3f4 f7g8 f4b8 g8g7 b8g3 g7f7 g3f3 f7e6 f3b3 e6f6 b3b2 f6f7
Top
peter
Posts: 3185
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Chess Engine Puzzle (High Difficulty)

Post by peter »

zullil wrote:
Ignacio wrote:Draw?. I don´t think so.
Neither does Stockfish:

Code: Select all

info depth 47 seldepth 79 multipv 1 score cp -6755 nodes 210455042553 nps 45781033 hashfull 999 tbhits 0 time 4596992 pv c7e5 a3a2 e5c3 b1c3 e1d2 c3b1 d2c2 a2a1q h1b1 a1a8 h3g4 a8g2 c2d1 h5g4 f5g6 f7g6 b1b6 g6f5 b6b3 g2d5 d1c2 d5b3 c2b3 f5e4 b3c2 e4f3 c2d2 f3g3 d2e3 g3h3 e3e4 g4g3 e4f3 g3g2 f3f2 h3h2 f2f3 g2g1q f3e4 h2g3 e4f5 g3h4 f5f6 h4h5 f6e7 g1e3 e7f7 e3f4 f7g8 f4b8 g8g7 b8g3 g7f7 g3f3 f7e6 f3b3 e6f6 b3b2 f6f7
Nor does komodo after backward solving of your SF's variant, Louis:

8/2B2k2/6p1/5P1p/6p1/p1p3PP/6P1/1n2K2R w - - 0 1

Analysis by Komodo 9.2 64-bit:

1.hxg4 a2 2.Bf4 a1Q 3.Kf2 Qb2+ 4.Ke3 c2 5.Ke4 Nc3+ 6.Kd3 Ne2 7.Bh6 c1Q 8.Rxc1 Nxc1+ 9.Kc4 gxf5 10.g5 Qxg2 11.Kb5 Qxg3 12.Kc4 Qe3 13.g6+ Kxg6 14.Bf8 Qc5+ 15.Bxc5
-+ (-250.00) Depth: 39 00:02:36 4517MN, tb=98625779
Peter.
Top
styx
Posts: 338
Joined: Tue Mar 13, 2012 9:59 pm
Location: Germany

Re: Chess Engine Puzzle (High Difficulty)

Post by styx »

3 years ago, kingcrusher made a video about the first endgame study in this thread:

https://www.youtube.com/watch?v=BUk_zWrbcsM

very entertaining to watch and a flawless chess composition
Top
Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Chess Engine Puzzle (High Difficulty)

Post by Vinvin »

10 years ago HIARCS found it at depth 16/47 after 01h22m and 835 Millions nodes (=230 Knodes/sec) :
Copy from the computer chess forum :
----------------------------------------------------------------------------
Subject: Re: where are the difficult test positions ? please no positions that we
From: Vincent Lejeune
Message Number: 460352
Date: November 07, 2005 at 15:05:36

In Reply to: where are the difficult test positions ? please no positions that were
Message ID: 460300
Posted by: Thorsten Czub
On: November 07, 2005 at 12:00:19

1 more, old and very very hard :

[d]8/3P3k/n2K3p/2p3n1/1b4N1/2p1p1P1/8/3B4 w - -

-----------------------------------
This is what Hiarcs8 produced after an overnight analysis:

New game
8/3P3k/n2K3p/2p3n1/1b4N1/2p1p1P1/8/3B4 w - - 0 1

Analysis by Hiarcs 8:
...
1.Nxe3 Ba5 2.Be2 Nb8 3.Bd3+ Kg8 4.Ke7 Nc6+ 5.Kd6 Nd8 6.Kxc5
-+ (-2.98) Depth: 8/29 00:00:04 778kN
1.Nxe3 Ba5 2.Be2 Nb8 3.Bd3+ Kg8 4.Bf5 Kf7 5.Kxc5 Ke7 6.Nc4
-+ (-3.02) Depth: 9/29 00:00:08 1423kN
1.Nxe3 Ba5 2.Be2 Nb8 3.Bd3+ Kg7 4.Nf5+ Kg6 5.Ne3+ Kf7 6.Nf5 h5
-+ (-3.02) Depth: 10/29 00:00:19 3339kN
1.Nxe3 Ba5 2.Be2 Nb8 3.Bd3+ Kg7 4.Nf5+ Kg6 5.Ne3+ Kf7 6.Nc4 Bd8 7.Ne5+ Kf6
8.Ng4+ Kg7
-+ (-3.13) Depth: 11/30 00:00:46 8237kN
1.Kc6 Ne6 2.Nxe3 Nb8+ 3.Kd6 Nd8 4.Ba4 Ba5 5.Kxc5 Kg6 6.Bb5 Kf6
-+ (-2.97) Depth: 11/32 00:01:20 14141kN
1.Kc6 Ne6
-+ (-2.72) Depth: 12/33 00:01:58 20333kN, tb=3
1.Kc6 Ne6 2.Nxe3 Nb8+ 3.Kd6 Nd8 4.Ba4 Ba5 5.Kxc5 Kg6 6.Kc4 Ndc6 7.Nd5 Ne5+ 8.Kb5
-+ (-2.62) Depth: 12/33 00:02:04 21450kN, tb=3
1.Kc6 Ne6 2.Nxe3 Nb8+ 3.Kd6 Nd8 4.Bf3 Na6 5.Be2 Nb8 6.Bb5 Ba5 7.Kxc5 Kg6 8.Nc2
-+ (-2.63) Depth: 13/37 00:04:22 45676kN, tb=12
1.Kc6 Ne6 2.Nxe3 Nb8+ 3.Kd6 Nd8 4.Bf3 Na6 5.Be2 c4+ 6.Kd5 Ba5 7.Kxc4 Nb8 8.Bg4
Kg6
-+ (-2.60) Depth: 14/41 00:09:46 101762kN, tb=195
1.d8Q Nf7+ 2.Ke7 Nxd8 3.Kxd8 Ba5+ 4.Kd7 Bc7 5.Nxe3 Bxg3 6.Nd5 Be5 7.Kc6 Kg6
8.Bc2+ Kg5 9.Kb5 Nb4 10.Nxb4
-+ (-2.59) Depth: 14/42 00:20:52 214470kN, tb=1238
1.d8Q Nf7+ 2.Ke7 Nxd8 3.Kxd8 Ba5+ 4.Kd7 Bc7 5.Nxe3 Bxg3 6.Bc2+ Kh8 7.Nd5 Nb4
8.Nxb4 cxb4 9.Ke6 Kg7 10.Kf5 h5
-+ (-2.52) Depth: 15/42 00:25:36 259117kN, tb=4086
1.d8Q Nf7+ 2.Ke7 Nxd8 3.Kxd8 Ba5+ 4.Kd7 Bc7 5.Nxe3 Bxg3 6.Nd5 Be5 7.Kc6 Bd4
8.Kb5 Nb8 9.Kc4 h5 10.Bf3 h4 11.Nxc3 Bxc3 12.Kxc3
-+ (-2.52) Depth: 16/46 00:57:12 580307kN, tb=15373
1.Nf6+ Kg7
-+ (-2.27) Depth: 16/47 01:22:08 834815kN, tb=19955
1.Nf6+ Kg7 2.Nh5+ Kg6 3.Bc2+ Kxh5 4.d8Q Kg4 5.Kc6 Nf3 6.Qg8+ Kh3 7.Qe6+ Kg2
8.Qxe3 Nd4+ 9.Kb7 Nxc2 10.Qe2+ Kxg3 11.Qxc2
± (1.30) Depth: 16/49 06:32:01 4294836396kN, tb=82936
Top
jdart
Posts: 4366
Joined: Fri Mar 10, 2006 5:23 am
Location: http://www.arasanchess.org

Re: Chess Engine Puzzle (High Difficulty)

Post by jdart »

People sometimes forget, Tal was a very good endgame player, not just a tactitian.

--Jon
Top
User avatar
Nathanael Russell
Posts: 803
Joined: Sat Jan 31, 2015 11:50 pm
Location: Philadelphia, USA

Re: Chess Engine Puzzle (High Difficulty)

Post by Nathanael Russell »

Vinvin wrote:10 years ago HIARCS found it at depth 16/47 after 01h22m and 835 Millions nodes (=230 Knodes/sec) :
Copy from the computer chess forum :
----------------------------------------------------------------------------
Subject: Re: where are the difficult test positions ? please no positions that we
From: Vincent Lejeune
Message Number: 460352
Date: November 07, 2005 at 15:05:36

In Reply to: where are the difficult test positions ? please no positions that were
Message ID: 460300
Posted by: Thorsten Czub
On: November 07, 2005 at 12:00:19

1 more, old and very very hard :

[d]8/3P3k/n2K3p/2p3n1/1b4N1/2p1p1P1/8/3B4 w - -

-----------------------------------
This is what Hiarcs8 produced after an overnight analysis:

New game
8/3P3k/n2K3p/2p3n1/1b4N1/2p1p1P1/8/3B4 w - - 0 1

Analysis by Hiarcs 8:
-+ (-2.52) Depth: 16/46 00:57:12 580307kN, tb=15373
1.Nf6+ Kg7


My i7-4940MX 4.2GHz found this answer in 5 minutes versus 60 minutes.

The rate at which computer engines can bruteforce analyze is not only staggering, but the increasing intelligence with which they bruteforce is slowly solving Chess a position at a time.

Thanks for the observation Vinvin.
Core_Engine_Tester_CCRL
Image
Top
BBauer
Posts: 658
Joined: Wed Mar 08, 2006 8:58 pm

Re: Chess Engine Puzzle (High Difficulty)

Post by BBauer »

Perhaps the FEN should be
[D]8/2B2k2/6p1/5P1p/6p1/p1p3PP/6P1/1n2K2R w K - 0 1
This looks more drawish to me.
Kind regards
Bernhard
Top

Return to “Computer Chess Club: General Topics”