Retro puzzle from the 70s

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MOBMAT
Posts: 385
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Location: USA

Retro puzzle from the 70s

Post by MOBMAT »

In the 70s, I started collecting chess puzzles. I stored them on 3x5 index cards in a wooden box. I would play out the simple ones myself, but then started using whatever chess engine I could find to solve the more difficult ones.

I found this one, don't know when or where, but it didn't have any of my annotations indicating I had attempted finding a solution, so I had my program MOBMAT and Stockfish 7 give it a shot.
This puzzle was cut from a publication and taped to a card. The text follows:

No. 1375
Dan Meinking/Ohio
White wins.

The puzzle had an board image, here is the FEN.

FEN: 8/8/8/8/8/pp6/p1k5/K1n2Q2 w

Eval goes up around ply 20, but even after ply 50 Stockfish didn't find a mate. can someone give it a try?Image
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Benchmark: Stockfish15.1 NNUE x64 bmi2 (nps): 1277K
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MikeB
Posts: 4889
Joined: Thu Mar 09, 2006 6:34 am
Location: Pen Argyl, Pennsylvania

Re: Retro puzzle from the 70s

Post by MikeB »

MOBMAT wrote:In the 70s, I started collecting chess puzzles. I stored them on 3x5 index cards in a wooden box. I would play out the simple ones myself, but then started using whatever chess engine I could find to solve the more difficult ones.

I found this one, don't know when or where, but it didn't have any of my annotations indicating I had attempted finding a solution, so I had my program MOBMAT and Stockfish 7 give it a shot.
This puzzle was cut from a publication and taped to a card. The text follows:

No. 1375
Dan Meinking/Ohio
White wins.

The puzzle had an board image, here is the FEN.

FEN: 8/8/8/8/8/pp6/p1k5/K1n2Q2 w

Eval goes up around ply 20, but even after ply 50 Stockfish didn't find a mate. can someone give it a try?Image
[d]8/8/8/8/8/pp6/p1k5/K1n2Q2 w - - 0 1

Code: Select all

position fen 8/8/8/8/8/pp6/p1k5/K1n2Q2 w - - 0 1
go infinite
info depth 1 seldepth 1 multipv 1 score cp 196 nodes 251 nps 125500 tbhits 0 time 2 pv f1c4 c2d2
info depth 2 seldepth 4 multipv 1 score cp 267 nodes 1771 nps 442750 tbhits 19 time 4 pv f1c4 c2d1 c4d4 d1e2
info depth 3 seldepth 6 multipv 1 score cp 336 nodes 3542 nps 708400 tbhits 22 time 5 pv f1c4 c2d1 c4d5 d1e2 d5h5 e2f1 h5b5 f1g2
info depth 4 seldepth 6 multipv 1 score cp 344 nodes 5540 nps 1108000 tbhits 35 time 5 pv f1c4 c2d1 c4a4 d1d2 a4b4 d2d3 b4a3
info depth 5 seldepth 7 multipv 1 score cp 12746 nodes 6822 nps 1137000 tbhits 84 time 6 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 6 seldepth 7 multipv 1 score cp 12746 nodes 7648 nps 1274666 tbhits 106 time 6 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 7 seldepth 14 multipv 1 score cp 12746 nodes 9332 nps 1555333 tbhits 134 time 6 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 8 seldepth 14 multipv 1 score cp 12746 nodes 10606 nps 1767666 tbhits 160 time 6 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 9 seldepth 14 multipv 1 score cp 12746 nodes 10960 nps 1826666 tbhits 168 time 6 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 10 seldepth 14 multipv 1 score cp 12746 nodes 13447 nps 1921000 tbhits 224 time 7 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 11 seldepth 14 multipv 1 score cp 12746 nodes 14761 nps 2108714 tbhits 247 time 7 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 12 seldepth 14 multipv 1 score cp 12746 nodes 19055 nps 2722142 tbhits 315 time 7 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 13 seldepth 14 multipv 1 score cp 12746 nodes 20293 nps 2899000 tbhits 328 time 7 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 14 seldepth 14 multipv 1 score cp 12746 nodes 29554 nps 3283777 tbhits 439 time 9 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 15 seldepth 14 multipv 1 score cp 12746 nodes 31292 nps 3476888 tbhits 452 time 9 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 16 seldepth 14 multipv 1 score cp 12746 nodes 39894 nps 3626727 tbhits 603 time 11 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 17 seldepth 14 multipv 1 score cp 12746 nodes 43182 nps 3598500 tbhits 640 time 12 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 18 seldepth 14 multipv 1 score cp 12746 nodes 47052 nps 3360857 tbhits 700 time 14 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 19 seldepth 14 multipv 1 score cp 12746 nodes 55465 nps 2641190 tbhits 908 time 21 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 20 seldepth 14 multipv 1 score cp 12746 nodes 65815 nps 2991590 tbhits 1000 time 22 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 21 seldepth 14 multipv 1 score cp 12746 nodes 75585 nps 2799444 tbhits 1156 time 27 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 22 seldepth 14 multipv 1 score cp 12746 nodes 78123 nps 2693896 tbhits 1202 time 29 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 23 seldepth 14 multipv 1 score cp 12746 nodes 89665 nps 2717121 tbhits 1307 time 33 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 24 seldepth 14 multipv 1 score cp 12746 nodes 111101 nps 3086138 tbhits 1497 time 36 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 25 seldepth 14 multipv 1 score cp 12746 nodes 116015 nps 3135540 tbhits 1529 time 37 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 26 seldepth 14 multipv 1 score cp 12746 nodes 125132 nps 3128300 tbhits 1617 time 40 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 27 seldepth 14 multipv 1 score cp 12746 nodes 164085 nps 3567065 tbhits 1825 time 46 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 28 seldepth 14 multipv 1 score cp 12746 nodes 175358 nps 3731021 tbhits 1894 time 47 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 29 seldepth 14 multipv 1 score cp 12746 nodes 203385 nps 4067700 tbhits 2002 time 50 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 30 seldepth 14 multipv 1 score cp 12746 nodes 277690 nps 4871754 tbhits 2304 time 57 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 31 seldepth 14 multipv 1 score cp 12746 nodes 432312 nps 5842054 tbhits 2988 time 74 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 32 seldepth 14 multipv 1 score cp 12746 nodes 432765 nps 5848175 tbhits 2998 time 74 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 33 seldepth 14 multipv 1 score cp 12746 nodes 457402 nps 6018447 tbhits 3098 time 76 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 34 seldepth 14 multipv 1 score cp 12746 nodes 517653 nps 6390777 tbhits 3457 time 81 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 35 seldepth 14 multipv 1 score cp 12746 nodes 714466 nps 8118931 tbhits 3844 time 88 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 36 seldepth 14 multipv 1 score cp 12746 nodes 967165 nps 10180684 tbhits 4328 time 95 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 37 seldepth 14 multipv 1 score cp 12746 nodes 1006839 nps 10487906 tbhits 4362 time 96 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 38 seldepth 14 multipv 1 score cp 12746 nodes 1319902 nps 12691365 tbhits 4571 time 104 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 39 seldepth 14 multipv 1 score cp 12746 nodes 2431691 nps 18705315 tbhits 5492 time 130 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 40 seldepth 14 multipv 1 score cp 12746 nodes 2443589 nps 18796838 tbhits 5498 time 130 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 41 seldepth 14 multipv 1 score cp 12746 nodes 2827013 nps 20338223 tbhits 5622 time 139 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 42 seldepth 14 multipv 1 score cp 12746 nodes 4375107 nps 24718118 tbhits 8520 time 177 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 43 seldepth 14 multipv 1 score cp 12746 nodes 4386241 nps 24781022 tbhits 8524 time 177 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 44 seldepth 14 multipv 1 score cp 12746 nodes 5806033 nps 27258370 tbhits 10748 time 213 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 45 seldepth 14 multipv 1 score cp 12746 nodes 5881932 nps 27357823 tbhits 10819 time 215 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 46 seldepth 14 multipv 1 score cp 12746 nodes 7343496 nps 29256956 tbhits 12632 time 251 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 47 seldepth 14 multipv 1 score cp 12746 nodes 11751453 nps 34161200 tbhits 15011 time 344 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 48 seldepth 14 multipv 1 score cp 12746 nodes 12891188 nps 34747137 tbhits 16086 time 371 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 49 seldepth 14 multipv 1 score cp 12746 nodes 15982082 nps 36076934 tbhits 20326 time 443 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 50 seldepth 14 multipv 1 score cp 12746 nodes 20861418 nps 38489701 tbhits 22732 time 542 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 51 seldepth 14 multipv 1 score cp 12746 nodes 24199844 nps 39802375 tbhits 23929 time 608 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 52 seldepth 14 multipv 1 score cp 12746 nodes 31572320 nps 40949831 tbhits 35070 time 771 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 53 seldepth 14 multipv 1 score cp 12746 nodes 37137715 nps 41587586 tbhits 41905 time 893 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 54 seldepth 14 multipv 1 score cp 12746 nodes 40394380 nps 41729731 tbhits 49107 time 968 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 55 seldepth 14 multipv 1 score cp 12746 nodes 41968716 nps 41843186 hashfull 1 tbhits 50611 time 1003 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 56 seldepth 14 multipv 1 score cp 12746 nodes 43384778 nps 41958199 hashfull 1 tbhits 51296 time 1034 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 57 seldepth 14 multipv 1 score cp 12746 nodes 58705907 nps 43166108 hashfull 1 tbhits 54425 time 1360 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 58 seldepth 14 multipv 1 score cp 12746 nodes 78586413 nps 43634876 hashfull 2 tbhits 65210 time 1801 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 59 seldepth 14 multipv 1 score cp 12746 nodes 89436917 nps 43755830 hashfull 2 tbhits 72116 time 2044 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 60 seldepth 14 multipv 1 score cp 12746 nodes 123885312 nps 43760265 hashfull 2 tbhits 84767 time 2831 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 61 seldepth 14 multipv 1 score cp 12746 nodes 123894748 nps 43748145 hashfull 2 tbhits 84768 time 2832 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 62 seldepth 14 multipv 1 score cp 12746 nodes 137121634 nps 43935159 hashfull 2 tbhits 84854 time 3121 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 63 seldepth 14 multipv 1 score cp 12746 nodes 137131192 nps 43938222 hashfull 2 tbhits 84855 time 3121 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 64 seldepth 14 multipv 1 score cp 12746 nodes 215308668 nps 44211225 hashfull 3 tbhits 97284 time 4870 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 65 seldepth 14 multipv 1 score cp 12746 nodes 269285351 nps 43886139 hashfull 3 tbhits 103363 time 6136 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 66 seldepth 14 multipv 1 score cp 12746 nodes 312148213 nps 43847199 hashfull 3 tbhits 104412 time 7119 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 67 seldepth 14 multipv 1 score cp 12746 nodes 477794008 nps 43392426 hashfull 5 tbhits 128518 time 11011 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 68 seldepth 14 multipv 1 score cp 12746 nodes 492424115 nps 43408331 hashfull 5 tbhits 133345 time 11344 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 69 seldepth 14 multipv 1 score cp 12746 nodes 814643037 nps 42709606 hashfull 5 tbhits 148347 time 19074 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 70 seldepth 14 multipv 1 score cp 12746 nodes 901791282 nps 42569452 hashfull 5 tbhits 148359 time 21184 pv f1c4 c2d1 c4a4 d1e1 a4a3
info depth 71 seldepth 14 multipv 1 score cp 12746 nodes 1046649812 nps 42436336 hashfull 5 tbhits 149183 time 24664 pv f1c4 c2d1 c4a4 d1e1 a4a3
looks like a mate score to me with 6 man EGTBs

and without 6 man egtb's it does take long either for SF to see mate

Code: Select all

McBrain 2017 v1.4 64 POPCNT by T. Romstad, M. Costalba, J. Kiiski, G. Linscott
p f 8/8/8/8/8/pp6/p1k5/K1n2Q2 w - - 0 1
so name hash value 8192
so name threads value 12
g i
info depth 1 seldepth 1 multipv 1 score cp 196 nodes 450 nps 150000 tbhits 0 time 3 pv f1c4 c2d2
info depth 2 seldepth 3 multipv 1 score cp 234 nodes 1849 nps 369800 tbhits 0 time 5 pv f1c4 c2d2 c4b4 d2c2
info depth 3 seldepth 6 multipv 1 score cp 272 nodes 3494 nps 582333 tbhits 0 time 6 pv f1c4 c2d1 c4d5 d1e2
info depth 4 seldepth 8 multipv 1 score cp 337 nodes 6594 nps 824250 tbhits 0 time 8 pv f1c4 c2d1 c4d5 d1e2 d5e4 e2d1 e4d4 d1e2
info depth 5 seldepth 10 multipv 1 score cp 363 nodes 10263 nps 1140333 tbhits 0 time 9 pv f1c4 c2d1 c4d5 d1e2 d5h5 e2d3 h5b5 d3e3 b5c5 e3e4
info depth 6 seldepth 12 multipv 1 score cp 396 nodes 21065 nps 1755416 tbhits 0 time 12 pv f1c4 c2d1 c4d5 d1e2 d5e5 e2f3 e5d5 f3g4 d5e4 g4h5
info depth 7 seldepth 14 multipv 1 score cp 386 nodes 24708 nps 1900615 tbhits 0 time 13 pv f1c4 c2d1 c4d4 d1e2 d4e5 e2f3 e5d5 f3e2 d5h5 e2f1 h5b5 f1g2 b5c6 g2h3
info depth 8 seldepth 18 multipv 1 score cp 378 nodes 40201 nps 2512562 tbhits 0 time 16 pv f1c4 c2d1 c4a4 d1c2 a4c6 c2d2 c6d5 d2e2 d5h5 e2f1 h5b5 f1g2 b5c6 g2h3 c6f3 h3h2
info depth 9 seldepth 24 multipv 1 score cp 386 nodes 46252 nps 2720705 tbhits 0 time 17 pv f1c4 c2d1 c4a4 d1c2 a4c6 c2d2 c6d5 d2e2 d5h5 e2f1 h5b5 f1g2 b5c6 g2h3 c6h6 h3g2 h6g6 g2h3
info depth 10 seldepth 24 multipv 1 score cp 386 nodes 52262 nps 2903444 tbhits 0 time 18 pv f1c4 c2d1 c4a4 d1c2 a4c6 c2d2 c6d5 d2e2 d5h5 e2f1 h5b5 f1g2 b5c6 g2h3 c6h6 h3g2 h6g6 g2h3
info depth 11 seldepth 34 multipv 1 score cp 352 nodes 181039 nps 6963038 tbhits 0 time 26 pv f1c4 c2d1 c4a4 d1c2 a4c6 c2d2 c6d5 d2e2 d5h5 e2f1 h5b5 f1g2 b5c6 g2h3 c6f3 h3h2 f3f2 h2h3 f2f1 h3g3 f1e1 g3f3 e1c3 f3e2 c3e5 e2f3 e5f6 f3g2 f6g7 g2h3 g7h6 h3g2 h6g5 g2h3
info depth 12 seldepth 36 multipv 1 score cp 345 nodes 218704 nps 7810857 tbhits 0 time 28 pv f1c4 c2d1 c4a4 d1c2 a4c6 c2d2 c6d5 d2e2 d5h5 e2f1 h5b5 f1g2 b5c6 g2h3 c6f3 h3h2 f3f2 h2h3 f2f1 h3g3 f1e1 g3g2 e1d2 g2f3 d2c3 f3g2 c3g7 g2h3 g7d7 h3g2 d7b7 g2g3 b7b8 g3h3 b8h8 h3g3 h8g8 g3h2
info depth 13 seldepth 38 multipv 1 score cp 345 nodes 236262 nps 8146965 tbhits 0 time 29 pv f1c4 c2d1 c4a4 d1c2 a4c6 c2d2 c6d5 d2e2 d5h5 e2f1 h5b5 f1g2 b5c6 g2h3 c6f3 h3h2 f3f2 h2h3 f2f1 h3g3 f1e1 g3g2 e1d2 g2f3 d2c3 f3g2 c3g7 g2h3 g7d7 h3g2 d7b7 g2g3 b7b8 g3h3 b8h8 h3g3 h8g8 g3h2
info depth 14 seldepth 38 multipv 1 score cp 601 nodes 338382 nps 8676461 tbhits 0 time 39 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2d1 b5h5 d1d2 h5a5 d2c2 a5c5 c2d2 c5a3 d2c2 a3c5 c2d2 c5b4 d2c2 b4c4 c2d2 c4f4 d2c2 f4c7 c2d1
info depth 15 seldepth 38 multipv 1 score cp 725 nodes 657277 nps 4762876 tbhits 0 time 138 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2d1 b5h5 d1d2 h5a5 d2e3 a5a3 c1d3 a3b3 e3d4 b3a2 d3f4 a1b1 f4d3 a2a3 d3c5
info depth 16 seldepth 38 multipv 1 score cp 728 nodes 869646 nps 4700789 tbhits 0 time 185 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2d1 b5h5 d1d2 h5a5 d2e3 a5c5 e3e4 c5e7 e4d5 e7a3 c1d3 a3b3 d5d4 b3a4 d4d5 a4b5 d3c5 b5b2 d5c4 b2a2 c4d4 a2b2 d4c4 b2e2 c4d4
info depth 17 seldepth 38 multipv 1 score cp 728 nodes 918867 nps 4712138 tbhits 0 time 195 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2d1 b5h5 d1d2 h5a5 d2e3 a5c5 e3e4 c5e7 e4d5 e7a3 c1d3 a3b3 d5d4 b3a4 d4d5 a4d1 d5d4 d1e2 d3c5 e2b2 d4c4 b2a2 c4d4 a2b2 d4c4 b2e2 c4d4
info depth 18 seldepth 38 multipv 1 score cp 730 nodes 1125799 nps 4770334 tbhits 0 time 236 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2d1 b5h5 d1d2 h5a5 d2e3 a5c5 e3e4 c5e7 e4d5 e7a3 c1d3 a3b3 d5d4 b3a4 d4d5 a4d1 d5d4 d1b3 d3e5 b3b4 d4d5 b4b2 e5c4 b2b5 d5d4
info depth 19 seldepth 38 multipv 1 score cp 732 nodes 1432373 nps 4990846 tbhits 0 time 287 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2d1 b5h5 c1e2 h5f3 d1d2 f3b3 e2c3 b3a3 d2c2 a3b4 c2d3 a1b2 c3d5 b4b3 d3e4 b2a2 e4e5 b3b5 e5e4 b5c4 e4e5 c4c5 e5e4
info depth 20 seldepth 38 multipv 1 score cp 732 nodes 1537640 nps 5024967 tbhits 0 time 306 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2d1 b5h5 c1e2 h5f3 d1d2 f3b3 e2c3 b3a3 d2c2 a3b2 c2d3 b2b3 d3d4 b3b4 d4d3 a1b2 c3d5 b4b3 d3e4 b2a2 e4e5 a2b2 e5d4 b3c2 d5e3 c2c3 d4e4 c3b4 e4d5
info depth 21 seldepth 39 multipv 1 score cp 733 nodes 2555591 nps 5472357 tbhits 0 time 467 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2d1 b5h5 d1d2 h5a5 d2e3 a5c5 e3e4 c5e7 e4d4 e7a3 c1d3 a3b3 d3c5 b3b4 d4d5 a1a2 c5d3 b4c3 d3c5 c3f3 d5e5 f3g3 e5e4 g3e1 e4d5 e1d2 d5e5 d2e2 e5d5 e2b5
info depth 22 seldepth 40 multipv 1 score cp 733 nodes 2570211 nps 5491903 tbhits 0 time 468 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2d1 b5h5 d1d2 h5a5 d2e3 a5c5 e3e4 c5e7 e4d4 e7a3 c1d3 a3b3 d3c5 b3b4 d4d5 a1a2 c5d3 b4c3 d3f4 a2b2 d5e4 c3b4 e4e5 b2a2 f4d5 b4c5 e5e4 c5c4 e4e5
info depth 23 seldepth 40 multipv 1 score cp 733 nodes 2587589 nps 5505508 tbhits 0 time 470 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2d1 b5h5 d1d2 h5a5 d2e3 a5c5 e3e4 c5e7 e4d4 e7a3 c1d3 a3b3 d3c5 b3b4 d4d5 a1a2 c5d3 b4c3 d3f4 c3b3 d5e5 b3b2 e5e4 b2f6 f4d3 f6c3 d3f4 c3c2 e4d4 c2b2 d4d5
info depth 24 seldepth 40 multipv 1 score cp 733 nodes 2602332 nps 5525121 tbhits 0 time 471 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2d1 b5h5 d1d2 h5a5 d2e3 a5c5 e3e4 c5e7 e4d4 e7a3 c1d3 a3b3 d3c5 b3b4 d4d5 a1a2 c5d3 b4c3 d3f4 c3b2 d5e4 b2f6 f4d3 f6c3 d3f4 a2b2 e4f5 c3c4 f5e5 c4c7 e5f5
info depth 25 seldepth 40 multipv 1 score cp 733 nodes 2957566 nps 5687626 tbhits 0 time 520 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2d1 b5h5 d1d2 h5a5 d2e3 a5c5 e3e4 c5e7 e4d4 e7a3 c1d3 a3b3 d3c5 b3b4 d4d5 a1a2 c5d3 b4c3 d3f4 c3b2 d5e4 b2f6 f4d3 f6e6 e4d4 e6b6 d4d5 b6b3 d5d4 a2b1 d3c5 b3c2 c5d3
info depth 26 seldepth 40 multipv 1 score cp 734 nodes 3935118 nps 6286130 tbhits 0 time 626 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2f3 b5c6 f3e2 c6a6 e2e3 a6a3 c1d3 a3b3 e3d4 b3a4 d4c5 a1a2 c5d5 a4d7 d5e4 d7e6 e4d4 e6b6 d4d5 b6e3 d3e5 a2b3 e5c6 b3c3 d5d6 e3b6 d6d7 b6b7 d7d6 c3b2 c6e5 b7b4 d6d5
info depth 27 seldepth 44 multipv 1 score cp 734 nodes 4225677 nps 6422001 tbhits 0 time 658 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2d1 b5h5 d1d2 h5a5 d2e3 a5c5 e3e4 c5e7 e4d4 e7a3 c1d3 a3b3 d3c5 b3b4 d4d5 b4f4 c5d3 f4f5 d5d4 f5d7 d4e4 a1a2 d3f4 d7d6 f4d3 d6c6 e4d4 c6b5 d3f4 b5b4 d4e5 b4b2 e5d5 b2c3 d5e4 c3f6 f4d3 f6e6 e4d4 e6b6 d4e4 b6d6
info depth 28 seldepth 49 multipv 1 score cp 734 nodes 5147289 nps 6808583 tbhits 0 time 756 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2d1 b5h5 d1d2 h5a5 d2e3 a5c5 e3e4 c5e7 e4f4 e7a3 c1d3 a3a4 f4e5 a4b3 d3c5 b3b2 e5d5 b2a2 d5d4 a2b2 d4d5 b2d2 d5e4 d2b4 e4d5 b4b5 d5d4 a1b2 c5e4 b5a4 d4e5 a4e8 e5d5 e8d8 d5e5 d8h8 e5f5 h8c8 f5f4 c8b8 f4f5 b8b5 f5g4 b5b4
info depth 29 seldepth 54 multipv 1 score cp 734 nodes 11059246 nps 9927509 hashfull 0 tbhits 0 time 1114 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2e3 b5c5 e3e4 c5e7 e4f5 e7a3 c1d3 a3b3 d3e5 b3d5 f5f4 d5d4 f4f5 d4e3 e5f7 e3d3 f5f6 a1a2 f6e5 d3e2 e5f5 e2f3 f5e6 f3e4 e6f6 a2b1 f7d6 e4h4 f6e6 h4e1 e6d5 e1d2 d5e5 d2c3 e5f5 c3c5 f5e6 b1b2 d6f5
info depth 30 seldepth 54 multipv 1 score cp 734 nodes 14400081 nps 11575627 hashfull 0 tbhits 0 time 1244 pv f1c4 c2d1 c4d5 d1e2 d5b5 e2e3 b5c5 e3e4 c5e7 e4f5 e7a3 c1d3 a3b3 d3f4 b3a2 f4h5 a2c2 f5g5 c2c7 g5g4 c7c4 g4g5 c4d5 g5g6 d5d3 g6g5 d3c3 g5f4 c3d4 f4g5 d4e5 g5g6 e5d6 g6g5 d6c5 g5g6 c5g1 g6f5 g1b1 f5f6 b1b6 f6g5 b6e3 g5g6 e3e8 g6g5 e8b5 g5g6 b5a6 g6f5
info depth 31 seldepth 54 multipv 1 score cp 736 nodes 21134836 nps 13582799 hashfull 0 tbhits 0 time 1556 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 b3b2 a1a2 c3d4 a2b1 d3e5 b5b2 d4e4 b2g2 e4f5 g2d5 f5f4 d5d4 f4f5 d4e3 f5e6 e3f2 e6d5 f2f5 d5d6 b1a2 d6d5 a2b3 d5d6 b3b2 e5c4 b2c3 c4e5 c3b3 d6d5 f5f4 e5d7 f4c4 d5d6 c4d4 d6e6
info depth 32 seldepth 54 multipv 1 score cp 736 nodes 24769686 nps 14268252 hashfull 2 tbhits 0 time 1736 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 b3b2 a1a2 c3d4 a2b1 d3e5 b5b2 d4e4 b2g2 e4f5 g2d5 f5f4 d5d4 f4f5 d4e3 f5e6 e3f2 e6d5 f2f5 d5d6 b1a2 d6d5 a2b3 d5d6 b3b2 e5c4 b2c3 c4e5 c3b3 d6d5 f5f4 d5e6 f4e4
info depth 33 seldepth 54 multipv 1 score cp 736 nodes 24903707 nps 14296043 hashfull 2 tbhits 0 time 1742 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 b3b2 a1a2 c3d4 a2b1 d3e5 b5b2 d4e4 b2g2 e4f5 g2d5 f5f4 d5d4 f4f5 d4e3 f5e6 e3f2 e6d5 f2f5 d5d6 b1a2 d6d5 a2b2 d5d6 f5e4 d6e6 b2b3 e6d6 e4f5 d6d5 b3a2 d5d6 a2b2
info depth 34 seldepth 54 multipv 1 score cp 736 nodes 25164064 nps 14354856 hashfull 2 tbhits 0 time 1753 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 b3b2 a1a2 c3d4 a2b1 d3e5 b5b2 d4e4 b2g2 e4f5 g2d5 f5f4 d5d4 f4f5 d4e3 f5e6 e3f2 e6d5 f2f5 d5d6 b1a2 d6d5 a2b2 d5d6 f5e4 d6e6 b2b3 e6d6 e4f5 d6d5 b3a2 d5d6 f5f6 d6d5
info depth 35 seldepth 54 multipv 1 score cp 736 nodes 32517455 nps 16573626 hashfull 2 tbhits 0 time 1962 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 b3b2 a1a2 c3d4 a2b1 d3e5 b5b2 d4e4 b2g2 e4f5 g2d5 f5f4 d5d4 f4f5 d4e3 f5e6 e3f2 e6d5 f2f5 d5d6 b1a2 d6d5 a2b2 d5d6 f5e4 d6e6 b2b3 e6d6 e4d4 d6e6 d4b6 e6f5 b6c5 f5f6 c5c2
info depth 36 seldepth 54 multipv 1 score cp 736 nodes 50973338 nps 20746169 hashfull 2 tbhits 0 time 2457 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 b3b2 a1a2 c3d4 a2b1 d3e5 b5b2 d4e4 b2g2 e4f5 g2d5 f5f4 d5d4 f4f5 d4e3 f5e6 e3f2 e6d5 f2f5 d5d6 b1a2 d6d5 a2b2 d5d6 f5e4 d6e6 b2b3 e6d6 e4d4 d6e6 d4b6 e6d5 b6e3 d5e6 e3d4 e6f5 d4f2 f5e4 f2c2 e4f4 c2c1 f4g4
info depth 37 seldepth 56 multipv 1 score cp 761 nodes 77469392 nps 24438294 hashfull 3 tbhits 0 time 3170 pv f1c4
info depth 37 seldepth 58 multipv 1 score cp 776 nodes 88162861 nps 25334155 hashfull 3 tbhits 0 time 3480 pv f1c4
info depth 37 seldepth 58 multipv 1 score cp 797 nodes 95221024 nps 25812150 hashfull 3 tbhits 0 time 3689 pv f1c4
info depth 37 seldepth 60 multipv 1 score cp 825 nodes 99493802 nps 26079633 hashfull 3 tbhits 0 time 3815 pv f1c4
info depth 37 seldepth 64 multipv 1 score cp 862 nodes 102249592 nps 26224568 hashfull 3 tbhits 0 time 3899 pv f1c4
info depth 37 seldepth 64 multipv 1 score cp 910 nodes 102459658 nps 26238068 hashfull 3 tbhits 0 time 3905 pv f1c4
info depth 37 seldepth 64 multipv 1 score cp 974 nodes 103208021 nps 26281645 hashfull 3 tbhits 0 time 3927 pv f1c4
info depth 37 seldepth 64 multipv 1 score cp 5027 nodes 103620628 nps 26299651 hashfull 3 tbhits 0 time 3940 pv f1c4
info depth 37 seldepth 67 multipv 1 score cp 5035 nodes 166004736 nps 26675998 hashfull 6 tbhits 0 time 6223 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 b3b2 a1a2 d3c1 a2b1 c1d3 b5d5 c3d2 d5d4 d2e2 b1c2 b2b1b c2b1 d3f2 d4c5 f2d3 c5b5 e2e3 b1c2 d3f2 b5c5 e3f3 c5e5 f2e4 c2d3 e4f2 d3c4 f2h3 e5f5 f3g3 f5d3 g3g2 d3e4 g2g3 e4e3 g3g2 c4d3 h3f2 d3c2 g2f1 e3c1 f1e2 c1a3 e2f1 a3c5 f1e2 c5e5 e2f3 e5f6 f3e3 f6c3 e3f4
info depth 38 seldepth 67 multipv 1 score cp 5042 nodes 206024979 nps 27875115 hashfull 8 tbhits 0 time 7391 pv f1c4
info depth 38 seldepth 67 multipv 1 score cp 5049 nodes 223333470 nps 28464627 hashfull 8 tbhits 0 time 7846 pv f1c4
info depth 38 seldepth 67 multipv 1 score cp 5060 nodes 236820509 nps 28891119 hashfull 9 tbhits 0 time 8197 pv f1c4
info depth 38 seldepth 67 multipv 1 score cp 5075 nodes 243206338 nps 29095147 hashfull 9 tbhits 0 time 8359 pv f1c4
info depth 38 seldepth 69 multipv 1 score cp 5096 nodes 247434512 nps 29230302 hashfull 9 tbhits 0 time 8465 pv f1c4
info depth 38 seldepth 69 multipv 1 score cp 5124 nodes 248850653 nps 29279992 hashfull 9 tbhits 0 time 8499 pv f1c4
info depth 38 seldepth 72 multipv 1 score cp 5161 nodes 294993025 nps 30805453 hashfull 9 tbhits 0 time 9576 pv f1c4
info depth 38 seldepth 72 multipv 1 score cp 5209 nodes 308738573 nps 31163679 hashfull 10 tbhits 0 time 9907 pv f1c4
info depth 38 seldepth 72 multipv 1 score cp 5271 nodes 359704401 nps 32804778 hashfull 10 tbhits 0 time 10965 pv f1c4
info depth 38 seldepth 72 multipv 1 score cp 5350 nodes 379341284 nps 33269714 hashfull 10 tbhits 0 time 11402 pv f1c4
info depth 38 seldepth 72 multipv 1 score cp 5451 nodes 438304800 nps 34899657 hashfull 10 tbhits 0 time 12559 pv f1c4
info depth 38 seldepth 72 multipv 1 score cp 5579 nodes 468705375 nps 35680981 hashfull 10 tbhits 0 time 13136 pv f1c4
info depth 38 seldepth 72 multipv 1 score cp 5741 nodes 548546975 nps 37687871 hashfull 10 tbhits 0 time 14555 pv f1c4
info depth 38 seldepth 74 multipv 1 score cp 5945 nodes 595195748 nps 38571430 hashfull 10 tbhits 0 time 15431 pv f1c4
info depth 38 seldepth 74 multipv 1 score cp 6202 nodes 654171491 nps 39541313 hashfull 10 tbhits 0 time 16544 pv f1c4
info depth 38 seldepth 74 multipv 1 score cp 6526 nodes 710568668 nps 40256567 hashfull 10 tbhits 0 time 17651 pv f1c4
info depth 38 seldepth 74 multipv 1 score cp 6932 nodes 748345493 nps 40686429 hashfull 10 tbhits 0 time 18393 pv f1c4
info depth 38 seldepth 74 multipv 1 score cp 7441 nodes 787314990 nps 41016670 hashfull 11 tbhits 0 time 19195 pv f1c4
info depth 38 seldepth 74 multipv 1 score cp 8079 nodes 828851212 nps 41425990 hashfull 12 tbhits 0 time 20008 pv f1c4
info depth 38 seldepth 74 multipv 1 score cp 8879 nodes 871403342 nps 41614295 hashfull 14 tbhits 0 time 20940 pv f1c4
info depth 38 seldepth 74 multipv 1 score cp 9881 nodes 891362201 nps 41767592 hashfull 14 tbhits 0 time 21341 pv f1c4
info depth 38 seldepth 74 multipv 1 score cp 11136 nodes 911137606 nps 41793385 hashfull 14 tbhits 0 time 21801 pv f1c4
info depth 38 seldepth 74 multipv 1 score cp 12706 nodes 1373315992 nps 45160012 hashfull 15 tbhits 0 time 30410 pv f1c4
info depth 38 seldepth 74 multipv 1 score mate 30 nodes 2271975279 nps 47170669 hashfull 30 tbhits 0 time 48165 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 b3b2 a1a2 c3d4 a2b1 d3f4 b5a4 d4e5 b1b2 f4d5 b2c2 d5f4 c2c3 f4d5 c3d3 d5f4 d3c4 e5e4 a4b5 e4f3 b5c6 f3e3 c6a8 f4e2 a8a3 e3f2 c4d3 e2g3 a3f8 f2g2 f8f6 g3f1 d3e4 f1d2 e4e3 d2f1 e3f4 g2f2 f6e6 f2g2 e6e2 g2g1 f4f3 f1h2 f3g3 h2f1 g3h3 f1e3 e2f3 e3d5 f3g2
info depth 39 seldepth 74 multipv 1 score mate 30 nodes 2329195616 nps 47199392 hashfull 30 tbhits 0 time 49348 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 d3c1 b5c5 c3d2 c5c4 c1e2 a1b2 a2a1r b2a1 d2e3 a1b2 e2d4 b2c3 d4e2 c3b3 e2d4 b3b4 d4e2 c4d5 e2f4 d5e5 e3f3 b4c3 f4e2 c3d3 e2f4 d3d2 f3g4 d2e3 f4h5 e5d5 h5f6 d5b5 f6h7 b5d7 g4g5 d7h7 g5f6 h7c7 f6e6 e3e4 e6f6 c7c6 f6f7 e4f5 f7g8 f5f6 g8h8 f6f7
info depth 40 seldepth 74 multipv 1 score mate 30 nodes 2371722145 nps 47256757 hashfull 32 tbhits 0 time 50188 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 d3c1 b5c5 c3d2 c5c4 c1e2 a1b2 a2a1r b2a1 d2e3 a1b2 e2d4 b2c3 d4e2 c3b3 e2d4 b3b4 d4e2 c4d5 e2f4 d5e5 e3f3 b4c3 f4e2 c3d3 e2f4 d3d2 f3g4 d2e3 f4h5 e5d5 h5f6 d5b5 f6h7 b5d7 g4g5 d7h7 g5f6 e3d4 f6e6 h7g6 e6d7 d4c5 d7e7 c5d5 e7d8 g6g7 d8e8 d5e6 e8d8
info depth 41 seldepth 74 multipv 1 score mate 30 nodes 2546889485 nps 47446664 hashfull 34 tbhits 0 time 53679 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 d3c1 b5c5 c3d2 c5c4 c1e2 a1b2 a2a1r b2a1 d2e3 a1b2 e2d4 b2c3 d4e2 c3b3 e2d4 b3b4 d4e2 c4d5 e2f4 d5e5 e3f3 b4c3 f4e2 c3d3 e2f4 d3d2 f3g4 d2e3 f4h5 e5d5 h5f6 d5b5 f6h7 b5d7 g4g5 d7h7 g5f6 e3d4 f6e6 h7g6 e6d7 d4c5 d7e7 c5d5 e7d8 g6g7 d8e8 d5e6 e8d8
info depth 42 seldepth 74 multipv 1 score mate 30 nodes 2715990786 nps 47531383 hashfull 37 tbhits 0 time 57141 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 c3d4 b5b3 d3e5 a1a2 e5d3 b3a4 d4d5 a4b5 d3c5 a2b1 d5d4 b1c2 c5e4 b5c6 d4e5 c2d3 e4d6 c6c5 e5e6 c5a5 d6f5 a5e1 e6f6 d3e4 f5e7 e1f1 f6e6 f1d1 e6f7 d1d6 e7g6 d6d7 f7f6 d7f5 f6g7 f5e6 g7h8 e4f5 g6f4 e6e5 h8h7 f5f4 h7h6 e5g5 h6h7 f4f5
info depth 43 seldepth 74 multipv 1 score mate 30 nodes 2853086985 nps 47632424 hashfull 37 tbhits 0 time 59898 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 c3d4 b5b3 d3e5 a1a2 e5d3 b3a4 d4d5 a4a8 d5d4 a2b3 d3c5 b3c2 c5e6 a8a4 d4d5 a4d7 d5e5 c2c3 e6f4 d7d4 e5f5 c3c4 f4e6 d4d5 f5f6 d5e4 e6g5 e4f4 f6g6 c4d5 g5f7 f4g4 g6f6 g4e6 f6g7 e6f5 f7d8 f5g5 g7f8 g5d8 f8f7 d8h8 f7g6 d5e5 g6f7 h8h7 f7e8 e5e6 e8d8 h7d7
info depth 44 seldepth 74 multipv 1 score mate 29 nodes 3308068686 nps 47975007 hashfull 45 tbhits 0 time 68954 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 c3d4 b5b3 d3e5 a1a2 e5d3 b3a4 d4d5 a4a8 d5d4 a2b3 d3c5 b3c2 c5e6 a8a4 d4e5 c2c3 e5d5 a4a8 d5e5 c3c4 e6f4 a8f3 f4e6 f3d5 e5f6 d5e4 e6g5 e4f4 f6g6 c4d5 g5f7 f4g4 g6f6 g4e6 f6g7 e6f5 f7h6 f5g5 g7h7 d5e6 h6g8 e6f7 g8h6 f7f8 h6f5 g5f6 f5g7 f6g7
info depth 45 seldepth 74 multipv 1 score mate 29 nodes 3549639484 nps 48150291 hashfull 46 tbhits 0 time 73720 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 c3d4 b5b3 d3e5 a1a2 e5d3 b3a4 d4d5 a4a8 d5d4 a2b3 d3c5 b3c2 c5e6 a8a4 d4e5 c2c3 e5d5 a4b3 d5d6 b3b5 d6e7 c3d3 e7f6 d3e4 e6g5 e4d5 f6f5 b5a4 f5g6 a4f4 g5f7 f4g4 g6f6 g4e6 f6g7 e6f5 f7h6 f5g5 g7h7 d5e6 h6g8 e6f7 g8h6 f7f8 h6f5 g5f6 f5g7 f6g7
info depth 46 seldepth 74 multipv 1 score mate 29 nodes 4179616900 nps 48656774 hashfull 58 tbhits 0 time 85900 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 c3d4 b5b3 d3e5 a1a2 e5d3 b3a4 d4d5 a4a8 d5d4 a2b3 d3c5 b3c2 c5e6 a8a4 d4e5 c2c3 e5d5 a4b3 d5d6 b3b5 d6e7 c3d3 e7f6 d3e4 e6g5 e4d5 f6f5 b5b4 g5f7 b4e4 f5g5 e4e7 g5g6 e7e6 g6g7 e6f5 f7h6 f5g5 g7h7 d5e6 h6g8 e6f7 g8h6 f7f8 h6f5 g5f6 f5g7 f6g7
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MikeB
Posts: 4889
Joined: Thu Mar 09, 2006 6:34 am
Location: Pen Argyl, Pennsylvania

Re: Retro puzzle from the 70s

Post by MikeB »

it did to drop to a mate in 28 on the very next iteration

Code: Select all

info depth 55 seldepth 74 multipv 1 score mate 28 nodes 12322749535 nps 50924661 hashfull 146 tbhits 0 time 241980 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 c3d4 b5b3 d3c5 b3a2 c5d3 a2e6 d3f4 e6f6 d4e4 a1b2 f4d5 f6g7 e4f5 b2b3 d5f4 b3c4 f5e4 g7g4 e4e5 g4f3 f4e6 f3d5 e5f6 d5e4 e6f8 e4f3 f6e7 c4d5 f8d7 f3e4 e7f6 e4f4 f6g7 f4g4 g7f6 g4d7 f6g5 d5e5 g5g6 d7e7 g6h5 e5f5 h5h6 e7a7 h6h5 a7h7
you don't see 50M nps on 7 year old Mac Pro too often...unless the engine is crafty
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MikeB
Posts: 4889
Joined: Thu Mar 09, 2006 6:34 am
Location: Pen Argyl, Pennsylvania

Re: Retro puzzle from the 70s

Post by MikeB »

left it run for a bit , dropped to a mate-in-27:

Code: Select all

info depth 63 seldepth 74 multipv 1 score mate 27 nodes 45730030386 nps 54178199 hashfull 287 tbhits 0 time 844067 pv f1c4 c2d1 c4a4 d1c2 a4a3 c1d3 a3a4 c2c3 a4b5 c3d4 b5b3 d3c5 b3f7 c5e4 a1a2 e4c5 a2b2 c5d3 b2c2 d3e5 f7f4 d4d5 c2c3 e5c6 f4f3 d5d6 f3f5 c6e5 c3d4 e5c6 d4e4 c6e7 f5f6 d6d7 e4d4 e7c6 d4c5 c6d8 c5d5 d7c8 f6g7 d8b7 d5c6 b7a5 c6b5 a5b3 g7e7 b3a5 b5a5 c8b8 a5b6 b8c8 e7c7
kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Re: Retro puzzle from the 70s

Post by kgburcham »

[D] 8/8/8/8/8/pp6/p1k5/K1n2Q2 w - -

GUI: Tablebases with 6 pieces found!
8192 MB Hash
Nalimov 6 men EGTB available - 512 MB cache
Engine: Houdini 5.01 Pro x64-pext (8192 MB)
by Robert Houdart
8 threads used
15/41 0:00 +85.56 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc5+ Kd2 7.Qa3 Kd1 8.Qb2 Ke1 9.Qxc1+ Kf2 10.Qd2+ Kg3 (3.503.788) 27807 TB:2.278
16/41 0:00 +85.56 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc5+ Kd2 7.Qa3 Kd1 8.Qb2 Ke1 9.Qxc1+ Kf2 10.Qd2+ (3.529.477) 27791 TB:2.289
17/41 0:00 +85.52 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc5+ Kd2 7.Qa3 Kd1 8.Qb2 Ke1 9.Qxc1+ Kf2 10.Qd2+ Kg3 (3.563.619) 27624 TB:2.306
18/41 0:00 +85.52 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc5+ Kd2 7.Qa3 Kd1 8.Qb2 Ke1 9.Qxc1+ Kf2 10.Qd2+ Kg3 11.Qe3+ Kh2 12.Qxb3 (3.677.093) 27440 TB:2.394
18/41 0:00 +85.60 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc5+ Kd2 7.Qa3 Kd1 8.Qb2 Ke1 9.Qxc1+ Kf2 10.Qc3 Kg2 (3.820.501) 27289 TB:2.486
19/43 0:00 +85.80 1.Qc4+ Kd1 2.Qd5+ Ke2 3.Qb5+ Kd1 4.Qh5+ Kd2 5.Qa5+ Kc2 6.Qxa3 Nd3 7.Qa4 Kc3 8.Qb5 Nc1 9.Qe5+ Kb4 10.Qf4+ Ka3 11.Qxc1+ b2+ 12.Qxb2+ Ka4 13.Kxa2 Ka5 14.Qb3 (4.835.758) 28956 TB:3.021
20/50 0:00 +M34 1.Qc4+ Kd1 2.Qd5+ Ke2 3.Qb5+ Kd1 4.Qh5+ Kd2 5.Qa5+ Kc2 6.Qc5+ Kd3 7.Qxa3 Kc2 8.Qc5+ Kd2 9.Qb4+ Kd3 10.Qd6+ Ke3 11.Qe5+ Kf3 12.Qc3+ Ke4 13.Qc6+ Kf5 14.Qc5+ (5.396.741) 29330 TB:3.249
21/50 0:00 +M54 1.Qc4+ Kd1 2.Qd5+ Ke2 3.Qb5+ Kd1 4.Qh5+ Kd2 5.Qa5+ Kc2 6.Qc5+ Kd3 7.Qxa3 Kc2 8.Qb2+ Kd1 9.Qe5 Ne2 10.Qd6+ Kc2 11.Qg6+ Kd2 12.Qg2 Ke1 13.Qd5 Nc1 14.Qa5+ (18.958.992) 33855 TB:6.637
22/53 0:01 +M34 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc5+ Kd2 7.Qd5+ Ke1 8.Qa5+ Kf1 9.Qc3 Ne2 10.Qf3+ Kg1 11.Qe3+ Kh1 12.Qe4+ Kh2 13.Qxe2+ Kg1 14.Qe1+ (41.217.750) 39217 TB:11.976
23/53 0:01 +M29 1.Qc4+ Kd1 2.Qd5+ Ke2 3.Qb5+ Kd1 4.Qh5+ Kd2 5.Qa5+ Kc2 6.Qc5+ Kd3 7.Qxa3 Kd2 8.Qb2+ Kd1 9.Qc3 Ne2 10.Qxb3+ (52.191.794) 41653 TB:13.218
24/53 0:01 +M29 1.Qc4+ Kd1 2.Qd5+ Ke2 3.Qb5+ Kd1 4.Qh5+ Kd2 5.Qa5+ Kc2 6.Qc5+ Kd3 7.Qxa3 Kd2 8.Qb2+ Kd1 9.Qc3 Ne2 10.Qxb3+ (54.114.008) 41916 TB:13.562
24/53 0:01 +M28 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc5+ Kd2 7.Qc4 Kd1 8.Qc3 Ne2 9.Qxb3+ (63.637.613) 42005 TB:14.258
25/53 0:01 +M28 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc5+ Kd2 7.Qc4 Kd1 8.Qc3 Ne2 9.Qxb3+ (65.784.494) 42359 TB:14.378
26/57 0:01 +M28 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc5+ Kd2 7.Qc4 Kd1 8.Qc3 Ne2 9.Qxb3+ (77.002.517) 44178 TB:14.726
27/58 0:01 +M28 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc5+ Kd2 7.Qc4 Kd1 8.Qc3 Ne2 9.Qxb3+ (83.446.856) 45009 TB:15.165
28/60 0:02 +M28 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc5+ Kd2 7.Qc4 Kd1 8.Qc3 Ne2 9.Qxb3+ (101.836.049) 46864 TB:16.180
29/60 0:02 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (106.362.382) 47000 TB:16.621
30/60 0:02 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (110.123.013) 46980 TB:17.449
30/60 0:03 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (154.039.097) 49088 TB:20.066
31/60 0:03 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (178.712.993) 49919 TB:21.856
32/60 0:04 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (212.592.203) 51525 TB:23.204
33/61 0:10 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (564.284.836) 56220 TB:35.624
33/61 0:10 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (579.729.217) 56251 TB:36.747
34/70 0:13 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (789.017.188) 57308 TB:43.152
34/70 0:13 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (793.752.685) 57318 TB:43.247
35/70 0:14 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (834.347.368) 57355 TB:44.460
35/70 0:15 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (867.758.392) 57391 TB:46.223
36/70 0:15 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (901.380.317) 57493 TB:46.459
36/70 0:15 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (909.109.445) 57524 TB:46.598
36/70 0:16 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (957.017.965) 57655 TB:47.253
36/70 0:16 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (973.698.796) 57649 TB:48.249
37/70 0:18 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (1.051.953.961) 57771 TB:48.847
37/70 0:18 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (1.062.878.850) 57783 TB:48.901
38/70 0:20 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (1.189.275.778) 57962 TB:52.973
38/70 0:20 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (1.201.422.563) 57992 TB:53.454
39/70 0:29 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (1.755.597.009) 59190 TB:60.397
39/70 0:30 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (1.783.032.532) 59219 TB:61.226
40/70 1:35 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (5.853.059.750) 61043 TB:121.201
40/70 1:41 +M27 1.Qc4+ Kd1 2.Qa4 Kc2 3.Qxa3 Nd3 4.Qa4 Kc3 5.Qb5 Nc1 6.Qc6+ Kd2 7.Qc4 Nd3 8.Qxb3 (6.182.624.698) 61094 TB:121.317
no chess program was born totally from one mind. all chess programs have many ideas from many minds.
MOBMAT
Posts: 385
Joined: Sat Feb 04, 2017 11:57 pm
Location: USA

Re: Retro puzzle from the 70s

Post by MOBMAT »

how do you put board images in a post?
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Sven
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Full name: Sven Schüle

Re: Retro puzzle from the 70s

Post by Sven »

MOBMAT wrote:how do you put board images in a post?
With the letter "d" or "D" in square brackets, followed by the FEN string.
MOBMAT
Posts: 385
Joined: Sat Feb 04, 2017 11:57 pm
Location: USA

Re: Retro puzzle from the 70s

Post by MOBMAT »

This is from a game between IM Luc Winants (white) and GM Anatoly Karpov (black)

The dialog that describes the position indicates that black played Qe2+ (QK7ch in those days). I ran stockfish on it for awhile and it did not like that move at all. What say you? Was the IM correct or do the engines need to think deeper?

[d]8/r4pk1/1Q4pp/3p2P1/1R6/P1p1PPP1/6K1/3q4 b - - 4 1
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