Extremely long forced mate from S11 Stockfish vs Chiron match

[MikeB]

an 11 minute search with no EGTB with McBrain 9.6 (not yet released) , this version has a modified Monte Carlo search originally written by Stefano Cardanobile, finds the first mate in just over 5 minutes and just over 9 billion nodes searched

Code: Select all

Mac-Pro:~/cluster.mfb % McBrain-96
McBrain 9.6 64 POPCNT by M. Byrne, I. Ivec, Stockfish authors and others
s hash 24000
s threads 23
Confirmation: hash set to 24000
p f 2q3k1/1p3prb/p1p2b2/P1P1nP2/1P2R3/7Q/2B2P2/2B2K1R w - - 1 50
Confirmation: threads set to 23
s minimal_output true
Confirmation: minimal_output set to true
g i
info depth 1 seldepth 1 multipv 1 score cp 444 nodes 3959 nps 989750 tbhits 0 time 4 pv c1f4
info depth 2 seldepth 2 multipv 1 score cp 601 nodes 8272 nps 2068000 tbhits 0 time 4 pv e4e1 b7b5 a5b6
info depth 3 seldepth 4 multipv 1 score cp 585 nodes 12127 nps 2425400 tbhits 0 time 5 pv e4d4 b7b5 a5b6 a6a5
info depth 4 seldepth 6 multipv 1 score cp 450 nodes 14300 nps 2860000 tbhits 0 time 5 pv e4d4 f6d8 d4d1 d8e7
info depth 5 seldepth 7 multipv 1 score cp 516 nodes 18262 nps 3652400 tbhits 0 time 5 pv e4d4 b7b5 a5b6 a6a5 b4a5 c8a6 f1e1
info depth 6 seldepth 9 multipv 1 score cp 532 nodes 20807 nps 4161400 tbhits 0 time 5 pv e4d4 b7b5 a5b6 a6a5 b4a5 c8a6 f1e1 e5f3 h3f3
info depth 7 seldepth 10 multipv 1 score cp 610 nodes 64296 nps 8037000 tbhits 0 time 8 pv e4e1 g8h8 e1d1 e5c4 c2b3 c4e5 c1f4
info depth 8 seldepth 12 multipv 1 score cp 668 nodes 119698 nps 9974833 tbhits 0 time 12 pv e4e1 c8b8 c1h6 g7g4 e1e5 b8e5 h3g4 g8h8 h6f4
info depth 9 seldepth 12 multipv 1 score cp 665 nodes 207149 nps 10902578 tbhits 0 time 19 pv e4e1 g8f8 c1h6 h7g8 h1g1 c8d8 h6g7 f6g7 g1g7 f8g7 h3g3 g7f8 g3e5
info depth 10 seldepth 20 multipv 1 score cp 720 nodes 478700 nps 10879545 tbhits 0 time 44 pv e4e2 b7b6 a5b6 a6a5 c1h6 g7g4 b6b7 c8b7 e2e5 f6e5 h3g4 g8h8 b4a5 b7e7
info depth 11 seldepth 22 multipv 1 score cp 785 nodes 773723 nps 11213376 tbhits 0 time 69 pv e4e2 e5d7 c1h6 d7f8 h6g7 f6g7 h1g1 f8g6 h3g3 g7d4 f5g6 f7g6 c2g6
info depth 12 seldepth 21 multipv 1 score cp 826 nodes 1289851 nps 11620279 tbhits 0 time 111 pv e4e2 g8f8 c1h6 c8d8 h6g7 f6g7 h3h7 d8d4 h7h4 d4h4 h1h4 g7f6 h4h6 e5g4 h6h3
info depth 13 seldepth 22 multipv 1 score cp 851 nodes 1864330 nps 11950833 tbhits 0 time 156 pv e4e2 g8f8 c1h6 c8d8 h6g7 f6g7 h3h7 d8d4 h7h4 d4h4 h1h4 g7f6 h4h3 f8g7 h3g3 g7f8 f1g2 e5c4 c2b3 c4a3 g2f1
info depth 14 seldepth 29 multipv 1 score cp 885 nodes 3526790 nps 12686294 tbhits 0 time 278 pv e4e2 e5d7 c1h6 d7f8 h6g7 f6g7 e2e7 c8d8 h3h4 h7f5 c2f5 d8d1 f1g2 d1d8 e7b7 d8d4 h4e7 d4f6
info depth 15 seldepth 38 multipv 1 score cp 970 nodes 7985568 nps 14285452 tbhits 0 time 559 pv e4e2 e5d7 c1h6 d7f8 h6g7 f6g7 e2e7 c8d8 h3h4 d8d4 h4d4 g7d4 h1g1 d4g7 f5f6 h7g6 f6g7 g8g7 e7b7 g7f6 c2g6 f8g6 b7b6 g6e5 b6a6 f6e7 a6b6
info depth 16 seldepth 40 multipv 1 score cp 1032 nodes 11975856 nps 15452717 tbhits 0 time 775 pv e4e2 c8b8 c1f4 b8c7 f4h6 g8f8 h6g7 f6g7 h3h7 e5g4 h7h4 g4f6 h1g1 c7d7 h4g3 f6e8 e2e8 f8e8 g3g7 e8e7 g1g3
info depth 17 seldepth 36 multipv 1 score cp 1089 nodes 19277169 nps 17398166 hashfull 4 tbhits 0 time 1108 pv e4e2 e5g4 f2f3 g4f2 e2f2 c8b8 f2g2 g8f8 g2g7 f6g7 h3h7 b8g3 h1h3 g3e5 h7h4 e5d4 h4d4 g7d4 c1d2 d4f6 f1g2 f8g8 c2b3 f6g7
info depth 18 seldepth 32 multipv 1 score cp 1107 nodes 22505290 nps 18134802 hashfull 5 tbhits 0 time 1241 pv e4e2 g8f8 c1h6 c8d8 h6g7 f6g7 h3h7 d8g5 h1g1 e5g4 f5f6 g7f6 c2b3 f6g7 h7h3 f7f5 h3g3 g5d8 f2f3 g7h6 f3g4 f5f4 e2f2 f8g7 g3c3 g7g6 f1g2
info depth 19 seldepth 44 multipv 1 score cp 1149 nodes 30639416 nps 19691141 hashfull 7 tbhits 0 time 1556 pv e4e2 c8d7 c1h6 h7g6 h6g7 f6g7 f5g6 g8f8 g6f7 d7h3 h1h3 f8f7 h3e3 g7h8 e3e5 h8e5 e2e5 f7f6 e5h5 f6e6 c2b3 e6f6 h5h7 f6f5 h7f7 f5g4 f7b7
info depth 20 seldepth 41 multipv 1 score cp 1227 nodes 55448111 nps 22827546 hashfull 14 tbhits 0 time 2429 pv e4e2 c8d8 c1h6 g7g6 h6f4 g6g7 e2e5 f6e5 f4e5 f7f6 h3h4 d8d5 e5f6 d5g2 f1e1 h7f5 c2b3 g8f8 f6g7 f8e8 h4h5 g2g6 h5g6 f5g6 h1h8 e8d7 h8b8 g6d3 b8b7 d7c8 b7e7 d3b1 b3c4 c8d8 e7f7 b1e4
info depth 21 seldepth 42 multipv 1 score cp 1232 nodes 70468660 nps 23887681 hashfull 17 tbhits 0 time 2950 pv e4e2 c8d8 c1h6 g8f8 h6g7 f6g7 h3h7 d8g5 h1g1 e5g4 f5f6 g7f6 c2b3 g5g6 h7g6 g4h2 f1g2 f7g6 g2h2 f8g7 g1d1 f6c3 d1d7 g7h6 d7b7 c3f6 b7f7
info depth 22 seldepth 34 multipv 1 score cp 1242 nodes 92883802 nps 25009101 hashfull 21 tbhits 0 time 3714 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1e5 b8b7 h7g8 d3g6 g7g6 f2f4 e5f4 c1f4 g6f5 f4d6 f7f6 h3f3 f5e4 f3f6 g8c4 f1g2 c4d5 f6f4 e4d3 g2f2
info depth 23 seldepth 38 multipv 1 score cp 1398 nodes 150463903 nps 26194969 hashfull 30 tbhits 0 time 5744 pv e4e2 c8d8 c1h6 g8f8 h6g7 f6g7 h3h7 d8g5 h1g1 e5g4 f5f6 g7f6 c2b3 g5g6 h7g6 g4h2 f1g2 f7g6 g2h2 f8g7 g1d1 f6c3 d1d7 g7f6 e2e6 f6f5 d7b7 g6g5 e6c6
info depth 24 seldepth 44 multipv 1 score cp 1437 nodes 192299795 nps 26749171 hashfull 35 tbhits 0 time 7189 pv e4e2 c8d8 c1h6 g8f8 h6g7 f6g7 h3h7 d8d4 h1g1 e5g4 h7h3 g4e5 h3g3 g7f6 c2b3 e5g4 g3g4 d4g4 g1g4 f6c3 f1g2 c3f6 e2d2 b7b6 a5b6 f6e5 d2d7 f8e8 d7f7
info depth 25 seldepth 36 multipv 1 score cp 1490 nodes 251917498 nps 27231380 hashfull 49 tbhits 0 time 9251 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1f6 b8b7 h7g8 d3g6 g7g6 h3g3 g6h7 f2f4 f6g7 b7b8 f7f6 g3h3 h7g6 b8g8 g6f7 g8b8 g7f8 b8b7 f7e6 h3h8 f8c5 b4c5 e6d5 c1e3
info depth 26 seldepth 43 multipv 1 score cp 1525 nodes 328730018 nps 27846676 hashfull 68 tbhits 0 time 11805 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1e5 b8b7 h7g8 d3g6 g7g6 f2f4 e5f6 h3g3 g6f5 g3g8 f5e4 g8g3 e4d5 b7f7 d5e6 f7a7 e6d5 c1d2 d5c4 g3g6 f6h4 a7d7 c4b5 d7b7 b5c4 g6c6 h4d8 c6a6
info depth 27 seldepth 46 multipv 1 score cp 1666 nodes 554916806 nps 28550977 hashfull 115 tbhits 0 time 19436 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1e5 b8b7 h7g8 d3g6 g7g6 f2f4 e5f6 h3g3 g6f5 g3g8 f5e4 g8g3 f6d4 b7f7 d4h8 g3h3 h8a1 f7c7 a1d4 c7d7 d4a1 h3h6 a1c3 h6d6 c3b4 d6d4 e4f3
info depth 28 seldepth 53 multipv 1 score cp 1815 nodes 819939853 nps 28856896 hashfull 175 tbhits 0 time 28414 pv e4e2 e5g4 f2f3 g4e5 c1h6 h7g6 h6g7 f6g7 f5g6 c8h3 h1h3 e5g6 e2e8 g7f8 h3g3 g8g7 c2b3 g7f6 g3g6 f6g6 e8f8 f7f5 f8f7 g6g5 f7b7 g5f4 b4b5 a6b5 a5a6 f4f3 a6a7 f3e3 a7a8q e3d4 b7f7 d4c3 a8c6
info depth 29 seldepth 54 multipv 1 score cp 2624 nodes 2676325757 nps 29669372 hashfull 507 tbhits 0 time 90205 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 h7g8 d3g6 f7g6 c1h6 g7f6 h3f3 f6e5 b8g8 e5e4 f3f4 e4d3 f4f7 b7b6 a5b6 a1c3 b6b7 a6a5 b4a5 c3e5 h6g7 e5h2 g8h8 h2b8 h8b8 d3c2 a5a6 c2b3 a6a7 g6g5 a7a8q g5g4 b8e8
info depth 30 seldepth 56 multipv 1 score cp 5909 nodes 6211666973 nps 30014577 hashfull 881 tbhits 0 time 206955 pv e4e2 e5g4 f2f3 g4e5 c1h6 h7g6 h6g7 f6g7 f5g6 c8h3 h1h3 e5g6 e2e8 g7f8 h3g3 g8g7 c2b3 g7f6 g3g6 f7g6 e8f8 f6e5 f8f7 e5d4 f7b7 d4c3 b7b6 g6g5 b6a6 c3b3 a6c6 b3b4 a5a6 b4b5 c6g6 g5g4 f3g4 b5c5 a6a7 c5d5 a7a8q d5c4 g6d6 c4b4 a8e4 b4b3 d6b6 b3c3 b6b7
info depth 31 seldepth 58 multipv 1 score cp 6962 nodes 7609886013 nps 30152133 hashfull 935 tbhits 0 time 252383 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1d4 b8b7 h7g8 d3g6 g7g6 h3g3 g6h7 f2f4 d4f6 b7b8 f6g7 g3h3 h7g6 b8g8 g6f6 c1b2 f6f5 g8g7 f7f6 h3h6 f5e4 h6f6 e4d3 f6c6 d3c2 c6a6 c2b3 g7b7 b3c4 c5c6 c4d3 c6c7 d3e4 c7c8q
info depth 32 seldepth 68 multipv 1 score mate 34 nodes 9127939481 nps 30210460 hashfull 972 tbhits 0 time 302145 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 g7f6 h3h7 g6g7 h7h6 g7g6 d3g6 f7g6 b8b7 a1e5 h6h8 g6g5 h8f8 f6g6 f8g8 g6f6 c1g5 f6f5 b7f7 f5e6 g8e8 e6d5 e8e5 d5e5 f7c7 e5d5 g5h6 d5e6 c7c6 e6d7 c6a6 d7e8 c5c6 e8d8 h6g5 d8c8 a6b6 c8c7 g5f4 c7d8
info depth 33 seldepth 60 multipv 1 score mate 31 nodes 9823726877 nps 30274919 hashfull 978 tbhits 0 time 324484 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1e5 b8b7 h7g8 d3g6 g7g6 f2f4 e5f6 h3g3 g6f5 g3g8 f5e6 g8g3 e6d5 g3d3 d5c4 d3d6 f6d4 d6d4 c4d4 b7f7 d4c3 f7b7 c3c2 b7c7 c2d3 c7c6 d3c2 c6a6 c2c1 c5c6 c1b2 c6c7 b2b3 a6d6 b3c3 c7c8q c3b2 d6d2 b2b3 c8c2 b3b4 c2c1 b4a5 c1c3 a5a4 d2a2 a4b5 a2b2 b5a4 c3b4
info depth 34 seldepth 60 multipv 1 score mate 31 nodes 10374106730 nps 30314322 hashfull 981 tbhits 0 time 342218 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1e5 b8b7 h7g8 d3g6 g7g6 f2f4 e5f6 h3g3 g6f5 g3g8 f5e6 g8g3 e6d5 g3d3 d5c4 d3d6 f6d4 d6d4 c4d4 b7f7 d4c3 f7b7 c3c2 b7c7 c2d3 c7c6 d3c2 c6a6 c2c1 c5c6 c1b2 c6c7 b2b3 a6d6 b3c3 c7c8q c3b2 d6d2 b2b3 c8c2 b3b4 c2c1 b4a5 c1c3 a5a4 d2a2 a4b5 a2b2 b5a4
info depth 35 seldepth 60 multipv 1 score mate 30 nodes 10784659281 nps 30353072 hashfull 985 tbhits 0 time 355307 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1e5 b8b7 h7g8 d3g6 g7g6 f2f4 e5f6 h3g3 g6f5 g3g8 f5e6 g8g3 e6d5 g3d3 d5c4 d3d6 f6d4 d6d4 c4d4 b7f7 d4c3 f7b7 c3c2 b7c7 c2c1 c7c6 c1d2 c6d6 d2e3 c5c6 e3f4 c6c7 f4e5 d6a6 e5f4 c7c8q f4g3 a6g6 g3f3 g6f6 f3e3 c8c5 e3e4 c5c4 e4e5 c4f4 e5d5 f6d6
info depth 36 seldepth 60 multipv 1 score mate 30 nodes 11500099964 nps 30390581 hashfull 989 tbhits 0 time 378410 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1e5 b8b7 h7g8 d3g6 g7g6 f2f4 e5f6 h3g3 g6f5 g3g8 f5e6 g8g3 e6d5 g3d3 d5c4 d3d6 f6d4 d6d4 c4d4 b7f7 d4c3 f7b7 c3c2 b7c7 c2c1 c7c6 c1d2 c6d6 d2e3 c5c6 e3f4 c6c7 f4e5 d6a6 e5f4 c7c8q f4g5 c8c5 g5h4 a6d6 h4g3 c5e5 g3f3 d6f6 f3g4 f6g6 g4h4 e5h2
info depth 37 seldepth 54 multipv 1 score mate 25 nodes 14646629510 nps 30661176 hashfull 999 tbhits 0 time 477693 pv e4e2 e5d7 c1h6 d7f8 h6g7 f6g7 e2e7 c8d8 h3h4 d8d4 h4d4 g7d4 h1g1 d4g7 f5f6 h7g6 f6g7 g8g7 c2g6 f8g6 g1g6 g7g6 e7b7 g6g5 b7c7 g5f5 c7c6 f5e5 c6a6 e5d5 a6b6 f7f5 a5a6 d5c4 c5c6 c4c3 c6c7 c3c2 a6a7 f5f4 a7a8q c2b3 a8g8 b3c2 c7c8q c2b2 b6a6 f4f3 g8a2
info depth 38 seldepth 50 multipv 1 score mate 25 nodes 14949685521 nps 30679363 hashfull 999 tbhits 0 time 487288 pv e4e2 e5d7 c1h6 d7f8 h6g7 f6g7 e2e7 c8d8 h3h4 d8d4 h4d4 g7d4 h1g1 d4g7 f5f6 h7g6 f6g7 g8g7 c2g6 f8g6 g1g6 g7g6 e7b7 g6g5 b7c7 g5f5 c7c6 f5e5 c6a6 e5d5 a6b6 f7f5 a5a6 d5c4 c5c6 c4c3 c6c7 c3c2 a6a7 f5f4 a7a8q c2b3 a8g8 b3c2 c7c8q c2b2 b6a6 f4f3 g8a2
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info depth 39 seldepth 50 multipv 1 score mate 25 nodes 20500303164 nps 30985526 hashfull 999 tbhits 0 time 661609 pv e4e2 e5d7 c1h6 d7f8 h6g7 f6g7 e2e7 c8d8 h3h4 d8d4 h4d4 g7d4 h1g1 d4g7 f5f6 h7g6 f6g7 g8g7 c2g6 f8g6 g1g6 g7g6 e7b7 g6g5 b7c7 g5f5 c7c6 f5e5 c6a6 e5d5 a6b6 f7f5 a5a6 d5c4 c5c6 c4c3 c6c7 c3c2 a6a7 f5f4 a7a8q c2b3 a8g8 b3c2 c7c8q c2b2 b6a6 f4f3 g8a2
bestmove e4e2 ponder e5d7

[zullil]

an 11 minute search with no EGTB with McBrain 9.6 (not yet released) , this version has a modified Monte Carlo search originally written by Stefano Cardanobile, finds the first mate in just over 5 minutes and just over 9 billion nodes searched

Code: Select all

Mac-Pro:~/cluster.mfb % McBrain-96
McBrain 9.6 64 POPCNT by M. Byrne, I. Ivec, Stockfish authors and others
s hash 24000
s threads 23
Confirmation: hash set to 24000
p f 2q3k1/1p3prb/p1p2b2/P1P1nP2/1P2R3/7Q/2B2P2/2B2K1R w - - 1 50
Confirmation: threads set to 23
s minimal_output true
Confirmation: minimal_output set to true
g i
info depth 1 seldepth 1 multipv 1 score cp 444 nodes 3959 nps 989750 tbhits 0 time 4 pv c1f4
info depth 2 seldepth 2 multipv 1 score cp 601 nodes 8272 nps 2068000 tbhits 0 time 4 pv e4e1 b7b5 a5b6
info depth 3 seldepth 4 multipv 1 score cp 585 nodes 12127 nps 2425400 tbhits 0 time 5 pv e4d4 b7b5 a5b6 a6a5
info depth 4 seldepth 6 multipv 1 score cp 450 nodes 14300 nps 2860000 tbhits 0 time 5 pv e4d4 f6d8 d4d1 d8e7
info depth 5 seldepth 7 multipv 1 score cp 516 nodes 18262 nps 3652400 tbhits 0 time 5 pv e4d4 b7b5 a5b6 a6a5 b4a5 c8a6 f1e1
info depth 6 seldepth 9 multipv 1 score cp 532 nodes 20807 nps 4161400 tbhits 0 time 5 pv e4d4 b7b5 a5b6 a6a5 b4a5 c8a6 f1e1 e5f3 h3f3
info depth 7 seldepth 10 multipv 1 score cp 610 nodes 64296 nps 8037000 tbhits 0 time 8 pv e4e1 g8h8 e1d1 e5c4 c2b3 c4e5 c1f4
info depth 8 seldepth 12 multipv 1 score cp 668 nodes 119698 nps 9974833 tbhits 0 time 12 pv e4e1 c8b8 c1h6 g7g4 e1e5 b8e5 h3g4 g8h8 h6f4
info depth 9 seldepth 12 multipv 1 score cp 665 nodes 207149 nps 10902578 tbhits 0 time 19 pv e4e1 g8f8 c1h6 h7g8 h1g1 c8d8 h6g7 f6g7 g1g7 f8g7 h3g3 g7f8 g3e5
info depth 10 seldepth 20 multipv 1 score cp 720 nodes 478700 nps 10879545 tbhits 0 time 44 pv e4e2 b7b6 a5b6 a6a5 c1h6 g7g4 b6b7 c8b7 e2e5 f6e5 h3g4 g8h8 b4a5 b7e7
info depth 11 seldepth 22 multipv 1 score cp 785 nodes 773723 nps 11213376 tbhits 0 time 69 pv e4e2 e5d7 c1h6 d7f8 h6g7 f6g7 h1g1 f8g6 h3g3 g7d4 f5g6 f7g6 c2g6
info depth 12 seldepth 21 multipv 1 score cp 826 nodes 1289851 nps 11620279 tbhits 0 time 111 pv e4e2 g8f8 c1h6 c8d8 h6g7 f6g7 h3h7 d8d4 h7h4 d4h4 h1h4 g7f6 h4h6 e5g4 h6h3
info depth 13 seldepth 22 multipv 1 score cp 851 nodes 1864330 nps 11950833 tbhits 0 time 156 pv e4e2 g8f8 c1h6 c8d8 h6g7 f6g7 h3h7 d8d4 h7h4 d4h4 h1h4 g7f6 h4h3 f8g7 h3g3 g7f8 f1g2 e5c4 c2b3 c4a3 g2f1
info depth 14 seldepth 29 multipv 1 score cp 885 nodes 3526790 nps 12686294 tbhits 0 time 278 pv e4e2 e5d7 c1h6 d7f8 h6g7 f6g7 e2e7 c8d8 h3h4 h7f5 c2f5 d8d1 f1g2 d1d8 e7b7 d8d4 h4e7 d4f6
info depth 15 seldepth 38 multipv 1 score cp 970 nodes 7985568 nps 14285452 tbhits 0 time 559 pv e4e2 e5d7 c1h6 d7f8 h6g7 f6g7 e2e7 c8d8 h3h4 d8d4 h4d4 g7d4 h1g1 d4g7 f5f6 h7g6 f6g7 g8g7 e7b7 g7f6 c2g6 f8g6 b7b6 g6e5 b6a6 f6e7 a6b6
info depth 16 seldepth 40 multipv 1 score cp 1032 nodes 11975856 nps 15452717 tbhits 0 time 775 pv e4e2 c8b8 c1f4 b8c7 f4h6 g8f8 h6g7 f6g7 h3h7 e5g4 h7h4 g4f6 h1g1 c7d7 h4g3 f6e8 e2e8 f8e8 g3g7 e8e7 g1g3
info depth 17 seldepth 36 multipv 1 score cp 1089 nodes 19277169 nps 17398166 hashfull 4 tbhits 0 time 1108 pv e4e2 e5g4 f2f3 g4f2 e2f2 c8b8 f2g2 g8f8 g2g7 f6g7 h3h7 b8g3 h1h3 g3e5 h7h4 e5d4 h4d4 g7d4 c1d2 d4f6 f1g2 f8g8 c2b3 f6g7
info depth 18 seldepth 32 multipv 1 score cp 1107 nodes 22505290 nps 18134802 hashfull 5 tbhits 0 time 1241 pv e4e2 g8f8 c1h6 c8d8 h6g7 f6g7 h3h7 d8g5 h1g1 e5g4 f5f6 g7f6 c2b3 f6g7 h7h3 f7f5 h3g3 g5d8 f2f3 g7h6 f3g4 f5f4 e2f2 f8g7 g3c3 g7g6 f1g2
info depth 19 seldepth 44 multipv 1 score cp 1149 nodes 30639416 nps 19691141 hashfull 7 tbhits 0 time 1556 pv e4e2 c8d7 c1h6 h7g6 h6g7 f6g7 f5g6 g8f8 g6f7 d7h3 h1h3 f8f7 h3e3 g7h8 e3e5 h8e5 e2e5 f7f6 e5h5 f6e6 c2b3 e6f6 h5h7 f6f5 h7f7 f5g4 f7b7
info depth 20 seldepth 41 multipv 1 score cp 1227 nodes 55448111 nps 22827546 hashfull 14 tbhits 0 time 2429 pv e4e2 c8d8 c1h6 g7g6 h6f4 g6g7 e2e5 f6e5 f4e5 f7f6 h3h4 d8d5 e5f6 d5g2 f1e1 h7f5 c2b3 g8f8 f6g7 f8e8 h4h5 g2g6 h5g6 f5g6 h1h8 e8d7 h8b8 g6d3 b8b7 d7c8 b7e7 d3b1 b3c4 c8d8 e7f7 b1e4
info depth 21 seldepth 42 multipv 1 score cp 1232 nodes 70468660 nps 23887681 hashfull 17 tbhits 0 time 2950 pv e4e2 c8d8 c1h6 g8f8 h6g7 f6g7 h3h7 d8g5 h1g1 e5g4 f5f6 g7f6 c2b3 g5g6 h7g6 g4h2 f1g2 f7g6 g2h2 f8g7 g1d1 f6c3 d1d7 g7h6 d7b7 c3f6 b7f7
info depth 22 seldepth 34 multipv 1 score cp 1242 nodes 92883802 nps 25009101 hashfull 21 tbhits 0 time 3714 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1e5 b8b7 h7g8 d3g6 g7g6 f2f4 e5f4 c1f4 g6f5 f4d6 f7f6 h3f3 f5e4 f3f6 g8c4 f1g2 c4d5 f6f4 e4d3 g2f2
info depth 23 seldepth 38 multipv 1 score cp 1398 nodes 150463903 nps 26194969 hashfull 30 tbhits 0 time 5744 pv e4e2 c8d8 c1h6 g8f8 h6g7 f6g7 h3h7 d8g5 h1g1 e5g4 f5f6 g7f6 c2b3 g5g6 h7g6 g4h2 f1g2 f7g6 g2h2 f8g7 g1d1 f6c3 d1d7 g7f6 e2e6 f6f5 d7b7 g6g5 e6c6
info depth 24 seldepth 44 multipv 1 score cp 1437 nodes 192299795 nps 26749171 hashfull 35 tbhits 0 time 7189 pv e4e2 c8d8 c1h6 g8f8 h6g7 f6g7 h3h7 d8d4 h1g1 e5g4 h7h3 g4e5 h3g3 g7f6 c2b3 e5g4 g3g4 d4g4 g1g4 f6c3 f1g2 c3f6 e2d2 b7b6 a5b6 f6e5 d2d7 f8e8 d7f7
info depth 25 seldepth 36 multipv 1 score cp 1490 nodes 251917498 nps 27231380 hashfull 49 tbhits 0 time 9251 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1f6 b8b7 h7g8 d3g6 g7g6 h3g3 g6h7 f2f4 f6g7 b7b8 f7f6 g3h3 h7g6 b8g8 g6f7 g8b8 g7f8 b8b7 f7e6 h3h8 f8c5 b4c5 e6d5 c1e3
info depth 26 seldepth 43 multipv 1 score cp 1525 nodes 328730018 nps 27846676 hashfull 68 tbhits 0 time 11805 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1e5 b8b7 h7g8 d3g6 g7g6 f2f4 e5f6 h3g3 g6f5 g3g8 f5e4 g8g3 e4d5 b7f7 d5e6 f7a7 e6d5 c1d2 d5c4 g3g6 f6h4 a7d7 c4b5 d7b7 b5c4 g6c6 h4d8 c6a6
info depth 27 seldepth 46 multipv 1 score cp 1666 nodes 554916806 nps 28550977 hashfull 115 tbhits 0 time 19436 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1e5 b8b7 h7g8 d3g6 g7g6 f2f4 e5f6 h3g3 g6f5 g3g8 f5e4 g8g3 f6d4 b7f7 d4h8 g3h3 h8a1 f7c7 a1d4 c7d7 d4a1 h3h6 a1c3 h6d6 c3b4 d6d4 e4f3
info depth 28 seldepth 53 multipv 1 score cp 1815 nodes 819939853 nps 28856896 hashfull 175 tbhits 0 time 28414 pv e4e2 e5g4 f2f3 g4e5 c1h6 h7g6 h6g7 f6g7 f5g6 c8h3 h1h3 e5g6 e2e8 g7f8 h3g3 g8g7 c2b3 g7f6 g3g6 f6g6 e8f8 f7f5 f8f7 g6g5 f7b7 g5f4 b4b5 a6b5 a5a6 f4f3 a6a7 f3e3 a7a8q e3d4 b7f7 d4c3 a8c6
info depth 29 seldepth 54 multipv 1 score cp 2624 nodes 2676325757 nps 29669372 hashfull 507 tbhits 0 time 90205 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 h7g8 d3g6 f7g6 c1h6 g7f6 h3f3 f6e5 b8g8 e5e4 f3f4 e4d3 f4f7 b7b6 a5b6 a1c3 b6b7 a6a5 b4a5 c3e5 h6g7 e5h2 g8h8 h2b8 h8b8 d3c2 a5a6 c2b3 a6a7 g6g5 a7a8q g5g4 b8e8
info depth 30 seldepth 56 multipv 1 score cp 5909 nodes 6211666973 nps 30014577 hashfull 881 tbhits 0 time 206955 pv e4e2 e5g4 f2f3 g4e5 c1h6 h7g6 h6g7 f6g7 f5g6 c8h3 h1h3 e5g6 e2e8 g7f8 h3g3 g8g7 c2b3 g7f6 g3g6 f7g6 e8f8 f6e5 f8f7 e5d4 f7b7 d4c3 b7b6 g6g5 b6a6 c3b3 a6c6 b3b4 a5a6 b4b5 c6g6 g5g4 f3g4 b5c5 a6a7 c5d5 a7a8q d5c4 g6d6 c4b4 a8e4 b4b3 d6b6 b3c3 b6b7
info depth 31 seldepth 58 multipv 1 score cp 6962 nodes 7609886013 nps 30152133 hashfull 935 tbhits 0 time 252383 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1d4 b8b7 h7g8 d3g6 g7g6 h3g3 g6h7 f2f4 d4f6 b7b8 f6g7 g3h3 h7g6 b8g8 g6f6 c1b2 f6f5 g8g7 f7f6 h3h6 f5e4 h6f6 e4d3 f6c6 d3c2 c6a6 c2b3 g7b7 b3c4 c5c6 c4d3 c6c7 d3e4 c7c8q
info depth 32 seldepth 68 multipv 1 score mate 34 nodes 9127939481 nps 30210460 hashfull 972 tbhits 0 time 302145 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 g7f6 h3h7 g6g7 h7h6 g7g6 d3g6 f7g6 b8b7 a1e5 h6h8 g6g5 h8f8 f6g6 f8g8 g6f6 c1g5 f6f5 b7f7 f5e6 g8e8 e6d5 e8e5 d5e5 f7c7 e5d5 g5h6 d5e6 c7c6 e6d7 c6a6 d7e8 c5c6 e8d8 h6g5 d8c8 a6b6 c8c7 g5f4 c7d8
info depth 33 seldepth 60 multipv 1 score mate 31 nodes 9823726877 nps 30274919 hashfull 978 tbhits 0 time 324484 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1e5 b8b7 h7g8 d3g6 g7g6 f2f4 e5f6 h3g3 g6f5 g3g8 f5e6 g8g3 e6d5 g3d3 d5c4 d3d6 f6d4 d6d4 c4d4 b7f7 d4c3 f7b7 c3c2 b7c7 c2d3 c7c6 d3c2 c6a6 c2c1 c5c6 c1b2 c6c7 b2b3 a6d6 b3c3 c7c8q c3b2 d6d2 b2b3 c8c2 b3b4 c2c1 b4a5 c1c3 a5a4 d2a2 a4b5 a2b2 b5a4 c3b4
info depth 34 seldepth 60 multipv 1 score mate 31 nodes 10374106730 nps 30314322 hashfull 981 tbhits 0 time 342218 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1e5 b8b7 h7g8 d3g6 g7g6 f2f4 e5f6 h3g3 g6f5 g3g8 f5e6 g8g3 e6d5 g3d3 d5c4 d3d6 f6d4 d6d4 c4d4 b7f7 d4c3 f7b7 c3c2 b7c7 c2d3 c7c6 d3c2 c6a6 c2c1 c5c6 c1b2 c6c7 b2b3 a6d6 b3c3 c7c8q c3b2 d6d2 b2b3 c8c2 b3b4 c2c1 b4a5 c1c3 a5a4 d2a2 a4b5 a2b2 b5a4
info depth 35 seldepth 60 multipv 1 score mate 30 nodes 10784659281 nps 30353072 hashfull 985 tbhits 0 time 355307 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1e5 b8b7 h7g8 d3g6 g7g6 f2f4 e5f6 h3g3 g6f5 g3g8 f5e6 g8g3 e6d5 g3d3 d5c4 d3d6 f6d4 d6d4 c4d4 b7f7 d4c3 f7b7 c3c2 b7c7 c2c1 c7c6 c1d2 c6d6 d2e3 c5c6 e3f4 c6c7 f4e5 d6a6 e5f4 c7c8q f4g3 a6g6 g3f3 g6f6 f3e3 c8c5 e3e4 c5c4 e4e5 c4f4 e5d5 f6d6
info depth 36 seldepth 60 multipv 1 score mate 30 nodes 11500099964 nps 30390581 hashfull 989 tbhits 0 time 378410 pv e4e2 e5g6 f5g6 c8h3 h1h3 g7g6 e2e8 g8g7 c2d3 f6a1 e8b8 a1e5 b8b7 h7g8 d3g6 g7g6 f2f4 e5f6 h3g3 g6f5 g3g8 f5e6 g8g3 e6d5 g3d3 d5c4 d3d6 f6d4 d6d4 c4d4 b7f7 d4c3 f7b7 c3c2 b7c7 c2c1 c7c6 c1d2 c6d6 d2e3 c5c6 e3f4 c6c7 f4e5 d6a6 e5f4 c7c8q f4g5 c8c5 g5h4 a6d6 h4g3 c5e5 g3f3 d6f6 f3g4 f6g6 g4h4 e5h2
info depth 37 seldepth 54 multipv 1 score mate 25 nodes 14646629510 nps 30661176 hashfull 999 tbhits 0 time 477693 pv e4e2 e5d7 c1h6 d7f8 h6g7 f6g7 e2e7 c8d8 h3h4 d8d4 h4d4 g7d4 h1g1 d4g7 f5f6 h7g6 f6g7 g8g7 c2g6 f8g6 g1g6 g7g6 e7b7 g6g5 b7c7 g5f5 c7c6 f5e5 c6a6 e5d5 a6b6 f7f5 a5a6 d5c4 c5c6 c4c3 c6c7 c3c2 a6a7 f5f4 a7a8q c2b3 a8g8 b3c2 c7c8q c2b2 b6a6 f4f3 g8a2
info depth 38 seldepth 50 multipv 1 score mate 25 nodes 14949685521 nps 30679363 hashfull 999 tbhits 0 time 487288 pv e4e2 e5d7 c1h6 d7f8 h6g7 f6g7 e2e7 c8d8 h3h4 d8d4 h4d4 g7d4 h1g1 d4g7 f5f6 h7g6 f6g7 g8g7 c2g6 f8g6 g1g6 g7g6 e7b7 g6g5 b7c7 g5f5 c7c6 f5e5 c6a6 e5d5 a6b6 f7f5 a5a6 d5c4 c5c6 c4c3 c6c7 c3c2 a6a7 f5f4 a7a8q c2b3 a8g8 b3c2 c7c8q c2b2 b6a6 f4f3 g8a2
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info depth 39 seldepth 50 multipv 1 score mate 25 nodes 20500303164 nps 30985526 hashfull 999 tbhits 0 time 661609 pv e4e2 e5d7 c1h6 d7f8 h6g7 f6g7 e2e7 c8d8 h3h4 d8d4 h4d4 g7d4 h1g1 d4g7 f5f6 h7g6 f6g7 g8g7 c2g6 f8g6 g1g6 g7g6 e7b7 g6g5 b7c7 g5f5 c7c6 f5e5 c6a6 e5d5 a6b6 f7f5 a5a6 d5c4 c5c6 c4c3 c6c7 c3c2 a6a7 f5f4 a7a8q c2b3 a8g8 b3c2 c7c8q c2b2 b6a6 f4f3 g8a2
bestmove e4e2 ponder e5d7

From the search done yesterday (see above) by the current Cfish (20 threads, 32GB hash, no endgame tables). First mate score at depth 29 and 7 billion nodes (though almost 9 billion to complete the iteration):

Code: Select all

info depth 29 seldepth 48 multipv 1 score cp 8415 lowerbound nodes 7236913556 nps 51326356 hashfull 835 tbhits 0 time 140998 pv e4d4
info depth 29 currmove e4d4 currmovenumber 1
info depth 29 seldepth 48 multipv 1 score mate 46 lowerbound nodes 7252541850 nps 51330166 hashfull 837 tbhits 0 time 141292 pv e4d4

info depth 29 seldepth 48 multipv 1 score mate 21 nodes 8816361528 nps 51253148 hashfull 913 tbhits 0 time 172016 pv e4d4 b7b6 c1h6 g7g6 f5g6 c8h3 h1h3 e5g6 d4d6 b6a5 d6f6 g6h8 c2h7 g8h7 b4a5 h7g8 h3g3 h8g6 g3g6 f7g6 f6g6 g8f7 g6c6 f7e8 c6a6 e8e7 c5c6 e7d6 h6f4 d6c5 c6c7 c5d5 c7c8q d5d4 f4e3 d4d3 a6d6 d3e4 c8e6 e4f3 e6f5

[Jouni]

I have 400 positions mate set: 9 - 20 movers from Chest. Longer ones are mostly compositions. With 1 minute level (4 cores) best engines are:

SF Matefinder 2018 288/400
SF 9 269/400
Houdini 6/tactical 268/400

[Dann Corbit]

16K mate in 9 problems, sorted roughly from the easiest to the hardest.

[elcabesa]

position 2 of dm9.epd is a mate in 8