TestPosition: easy move?

[Henk]

[d]r1q2rk1/pbp4p/np1p2p1/1N2pnQ1/8/2PB2B1/PPP3PP/R3R1K1 w - - 2 19

In a real game I played Re5: but Skipper can't find it. Tsss. Just using intuition.

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12	 -0.47 	95.9M  	1:51.72	b2b4  f5g3  g5g3  b7c6  d3g6  g8h8  g3h4  c8d7  a2a4  f8f4  h4h5  c6d5 
12	 -0.62 	56.1M  	1:04.36	d3c4  g8h8  g5g4  f5g3  g4c8  f8c8  h2g3  a6c5  b2b4  c5d7  g1f1  b7c6 
 

[amanjpro]

I doubt it is an easy win to find. Especially for alpha beta engines. I mean going down 16 plies Zahak failed to find it... It requires at least 20 plies deep to see it

[j.t.]

Nalwald finds it at depth 18 after roughly 6 minutes, but at this point it still thinks it is at -46cp.

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info depth  1 seldepth  2 time      4 nodes       297 nps   59000 hashfull     2 score cp   78 pv g3f2 
info depth  2 seldepth  5 time      1 nodes       741 nps  370000 hashfull     3 score cp  -15 pv g3f2 a6c5 
info depth  3 seldepth  7 time      2 nodes      1346 nps  448000 hashfull     4 score cp    5 pv g3f2 a6c5 g5g4 
info depth  4 seldepth  9 time      2 nodes      3651 nps 1217000 hashfull     7 score cp   -8 pv g3f2 a6c5 b2b4 c5d3 
info depth  5 seldepth 10 time      5 nodes      7846 nps 1307000 hashfull     8 score cp   -8 pv g3f2 a6c5 b2b4 c5d3 c2d3 
info depth  6 seldepth 11 time     17 nodes     25350 nps 1408000 hashfull    16 score cp  -36 pv g3f2 a6c5 d3c4 d6d5 c4d3 c5e4 d3e4 
info depth  7 seldepth 13 time     31 nodes     48778 nps 1524000 hashfull    27 score cp  -34 pv g3f2 a6c5 f2c5 b6c5 d3e4 b7e4 e1e4 
info depth  8 seldepth 15 time     99 nodes    163703 nps 1637000 hashfull    47 score cp  -61 pv g3f2 a6c5 f2c5 b6c5 d3c4 d6d5 c4d3 e5e4 d3e2 
info depth  9 seldepth 17 time    203 nodes    374641 nps 1836000 hashfull   131 score cp  -56 pv a1d1 f5g3 d3c4 g8h8 h2g3 c8f5 g5f5 f8f5 e1f1 h8g7 
info depth 10 seldepth 19 time    489 nodes    909317 nps 1855000 hashfull   271 score cp  -70 pv a1d1 a6c5 d3c4 g8h8 d1d6 c7d6 b5d6 c8d8 g3e5 f5g7 d6f7 f8f7 g5d8 a8d8 
info depth 11 seldepth 21 time   1108 nodes   2179541 nps 1965000 hashfull   435 score cp  -56 pv e1f1 f5g3 f1f8 c8f8 h2g3 f8d8 g5h6 e5e4 d3c4 d6d5 a1d1 a6c5 h6f4 
info depth 12 seldepth 23 time   1528 nodes   3204004 nps 2095000 hashfull   639 score cp  -53 pv e1f1 e5e4 d3e2 c8d7 b5d4 f5g3 
info depth 13 seldepth 25 time   2114 nodes   4642329 nps 2194000 hashfull   897 score cp  -61 pv e1f1 e5e4 d3e2 a6c5 b5d4 c5e6 d4f5 e6g5 f5e7 g8g7 e7c8 a8c8 e2g4 c8e8 
info depth 14 seldepth 27 time  18845 nodes  42529093 nps 2256000 hashfull  1678 score cp  -57 pv a1d1 b7d5 e1f1 e5e4 d3e2 
info depth 15 seldepth 27 time  14093 nodes  30096979 nps 2135000 hashfull  2380 score cp  -28 pv a1d1 b7d5 b2b4 c8d7 g3f2 e5e4 d3f1 c7c6 a2a4 d7g7 c3c4 c6b5 c4d5 e4e3 f2e3 
info depth 16 seldepth 31 time  18662 nodes  40588913 nps 2174000 hashfull  2483 score cp  -30 pv a1d1 b7d5 b2b4 d5a2 g3f2 c8e6 b5a3 h7h6 
info depth 17 seldepth 32 time  54758 nodes 124003439 nps 2264000 hashfull  6412 score cp  -42 pv a1d1 b7d5 e1f1 f5g3 f1f8 c8f8 g5g3 c7c6 c3c4 c6b5 c4d5 a6c7 d1f1 
info depth 18 seldepth 36 time 261904 nodes 697973454 nps 2664000 hashfull 12957 score cp  -46 pv e1e5 d6e5 d3c4 f8f7 g5f6 c8f8 g3e5 f5g7 g1h1 
info depth 19 seldepth 37 time 116818 nodes 261766362 nps 2240000 hashfull 15499 score cp  -27 pv e1e5 d6e5 d3c4 f8f7 g5f6 c8f8 g3e5 f5g7 b2b4 a8e8 b5a7 b7e4 a7b5 e4c2 a1f1 e8e7 b5d4 c2e4 f1e1 g7h5 
info depth 20 seldepth 39 time 138198 nodes 267739200 nps 1937000 hashfull 21067 score cp    0 pv e1e5 d6e5 d3c4 f8f7 g5f6 c8e8 a1f1 b7e4 b5c7 a6c7 g3e5 g8f8 e5d6 f8g8 d6e5 
 

[JVMerlino]

Myrddin needs 1:18 to find the first fail high, and 1:34 to score it a draw. After five minutes, it's still scored as a draw.

[Henk]

[d]r1bqr1k1/pppn2pp/3p3n/8/2PP1p1b/1PN1P1P1/PB1N1P1P/R2QKB1R w KQ - 0 14

In this position of my real life game of last weak my last move was f5-f4. Skipper thinks white can take the bishop on h4. Tssss.

[Joost Buijs]

Of course he can take the bishop, but if it is any good that's another question. It's just a lack of king safety.
As human I would probably play something like e4, but hey it has been 15 years since I last played OTB chess.

[Henk]

My opponent also played e3-e4. Stockfish says Nf3 is best.

[Joost Buijs]

My engine also thinks that Nf3 is best, it gives a rather exaggerated score of about one knight advantage. Only at depth 1 it wants to take on f4 but not on h4.

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info depth 24 score cp 324 time 10505 nodes 243044356 nps 23136064 tbhits 0 pv d2f3 f4g3 h2g3 h4f6 d1c2 c7c6 e1c1 d7f8 c1b1 c8g4 f1e2 f8e6
info depth 25 score cp 324 time 14874 nodes 344593747 nps 23167523 tbhits 0 pv d2f3 f4g3 h2g3 h4f6 d1c2 c7c6 e1c1 d7f8 c1b1 c8g4 f1e2 f8e6
info depth 26 score cp 324 time 23836 nodes 553452196 nps 23219172 tbhits 0 pv d2f3 f4g3 h2g3 h4f6 d1c2 c7c6 e1c1 d7f8 c1b1 c8g4 f1e2 f8e6
info depth 27 score cp 324 time 35105 nodes 814397821 nps 23198912 tbhits 0 pv d2f3 f4g3 h2g3 h4f6 d1c2 c7c6 e1c1 d7f8 c1b1 c8g4 f1e2 f8e6
info depth 28 score cp 324 time 38213 nodes 886995369 nps 23211874 tbhits 0 pv d2f3 f4g3 h2g3 h4f6 d1c2 c7c6 e1c1 d7f8 c1b1 c8g4 f1e2 f8e6
info depth 29 score cp 324 time 58980 nodes 1372920556 nps 23277730 tbhits 0 pv d2f3 f4g3 h2g3 h4f6 d1c2 c7c6 e1c1 d7f8 c1b1 c8g4 f1e2 d8e7
info depth 30 score cp 324 time 113754 nodes 2650277464 nps 23298323 tbhits 0 pv d2f3 f4g3 h2g3 h4f6 d1c2 c7c6 e1c1 d7f8 e3e4 a7a6 e4e5 f6e7
info depth 31 score cp 337 time 258622 nodes 5996091350 nps 23184769 tbhits 0 pv d2f3 f4g3 h2g3 h4f6 d1c2 c7c6 e1c1 d7f8 f1d3 c8g4 d3e4 a8c8
info depth 32 score cp 326 time 345225 nodes 7988885301 nps 23141097 tbhits 0 pv d2f3 f4g3 h2g3 h4f6 d1c2 d7f8 e1c1 c8g4 f1e2 c7c6 e3e4 d8e7
info depth 33 score cp 329 time 517951 nodes 11991563645 nps 23151926 tbhits 0 pv d2f3 f4g3 h2g3 h4f6 d1c2 d7f8 e1c1 c8g4 f1e2 c7c6 e3e4 d8e7

[amanjpro]

My opponent also played e3-e4. Stockfish says Nf3 is best.

Dev version of Zahak finds Nf3 almost instantly

[Henk]

By the way I lost the game. Wasted all my time on finding out whether f5-f4 was correct but forgot to check what would happen if white refused the bishop. Being idiot. But position was already bad for black.