Any engines solve this one?

[zullil]

[d]r1b2rk1/pp3ppp/1n2p3/3pP3/2P2B2/b1PB1qP1/P1Q1NP1P/1K1R3R w - -

1. Nd4 with at least +2 or equivalent winning score.

Cfish-dev does eventually succeed. Only needs about 300 billion nodes

info depth 52 seldepth 90 multipv 1 score cp 76 lowerbound nodes 288593866717 nps 35228038 hashfull 1000 tbhits 0 time 8192164 pv e2d4
info depth 49 currmove e2d4 currmovenumber 1
info depth 52 seldepth 90 multipv 1 score cp 96 lowerbound nodes 289567672325 nps 35227570 hashfull 1000 tbhits 0 time 8219916 pv e2d4
info depth 48 currmove e2d4 currmovenumber 1
info depth 52 seldepth 90 multipv 1 score cp 123 lowerbound nodes 294887038756 nps 35229511 hashfull 1000 tbhits 0 time 8370455 pv e2d4
info depth 47 currmove e2d4 currmovenumber 1
info depth 52 seldepth 90 multipv 1 score cp 159 lowerbound nodes 304844104852 nps 35226084 hashfull 1000 tbhits 0 time 8653931 pv e2d4
info depth 46 currmove e2d4 currmovenumber 1
info depth 52 seldepth 90 multipv 1 score cp 206 lowerbound nodes 327513749719 nps 35256296 hashfull 1000 tbhits 0 time 9289511 pv e2d4
info depth 45 currmove e2d4 currmovenumber 1
info depth 45 currmove d3h7 currmovenumber 2
info depth 45 currmove c4d5 currmovenumber 3
info depth 45 currmove f4e3 currmovenumber 4
info depth 45 currmove c2b3 currmovenumber 5
info depth 45 currmove h1e1 currmovenumber 6
info depth 45 currmove f4g5 currmovenumber 7
info depth 45 currmove b1a1 currmovenumber 8
info depth 45 currmove g3g4 currmovenumber 9
info depth 45 currmove f4h6 currmovenumber 10
info depth 45 currmove h2h3 currmovenumber 11
info depth 45 currmove d1g1 currmovenumber 12
info depth 45 currmove d3e4 currmovenumber 13
info depth 45 currmove h2h4 currmovenumber 14
info depth 45 currmove h1g1 currmovenumber 15
info depth 45 currmove f4c1 currmovenumber 16
info depth 45 currmove c4c5 currmovenumber 17
info depth 45 currmove f4d2 currmovenumber 18
info depth 45 currmove c2a4 currmovenumber 19
info depth 45 currmove c2d2 currmovenumber 20
info depth 45 currmove d1d2 currmovenumber 21
info depth 45 currmove h1f1 currmovenumber 22
info depth 45 currmove e2c1 currmovenumber 23
info depth 45 currmove c2b2 currmovenumber 24
info depth 45 currmove d3g6 currmovenumber 25
info depth 45 currmove d1f1 currmovenumber 26
info depth 45 currmove c2c1 currmovenumber 27
info depth 45 currmove d1c1 currmovenumber 28
info depth 45 currmove d1e1 currmovenumber 29
info depth 45 currmove e2g1 currmovenumber 30
info depth 45 currmove d3f5 currmovenumber 31
info depth 52 seldepth 91 multipv 1 score cp 213 nodes 340489400821 nps 35274638 hashfull 1000 tbhits 0 time 9652527 pv e2d4 f3h5 g3g4 h5g4 c2d2 f7f6 h1g1 g4h4 g1g3 g7g6 e5f6 b6c4 d3c4 d5c4 f4g5 h4e4 b1a1 c8d7 d4c2 d7a4 c2a3 a4d1 d2d1 e4d5 d1e2 b7b5 h2h4 g8f7 g3g1 a8d8 a3b1 d5d3 e2b2 a7a6 b1d2 a6a5 g1e1 f7g8 e1e6 b5b4 f6f7 f8f7 g5d8 d3d8 d2c4 d8d1 b2b1 d1b1 a1b1 f7f2 c3b4 f2f4 c4a5 f4b4 b1c2 b4h4 a5c6 g6g5 c2b3 h4h3 b3b4 h3h4 b4b5 g5g4 a2a4 g4g3 e6e2 g8g7
info depth 53 currmove e2d4 currmovenumber 1
info depth 53 seldepth 20 multipv 1 score cp 223 lowerbound nodes 348148258269 nps 35293801 hashfull 1000 tbhits 0 time 9864289 pv e2d4
info depth 52 currmove e2d4 currmovenumber 1
info depth 53 seldepth 20 multipv 1 score cp 232 lowerbound nodes 351022812720 nps 35300507 hashfull 1000 tbhits 0 time 9943846 pv e2d4
info depth 51 currmove e2d4 currmovenumber 1
info depth 53 seldepth 44 multipv 1 score cp 246 lowerbound nodes 354273583940 nps 35305638 hashfull 1000 tbhits 0 time 10034476 pv e2d4
info depth 50 currmove e2d4 currmovenumber 1
info depth 53 seldepth 69 multipv 1 score cp 266 lowerbound nodes 371759844958 nps 35328619 hashfull 1000 tbhits 0 time 10522909 pv e2d4
info depth 49 currmove e2d4 currmovenumber 1
info depth 49 currmove d3h7 currmovenumber 2
info depth 49 currmove c4d5 currmovenumber 3
info depth 49 currmove g3g4 currmovenumber 4
info depth 49 currmove h1e1 currmovenumber 5
info depth 49 currmove d3e4 currmovenumber 6
info depth 49 currmove h1g1 currmovenumber 7
info depth 49 currmove b1a1 currmovenumber 8
info depth 49 currmove h2h4 currmovenumber 9
info depth 49 currmove d1d2 currmovenumber 10
info depth 49 currmove h1f1 currmovenumber 11
info depth 49 currmove f4g5 currmovenumber 12
info depth 49 currmove f4c1 currmovenumber 13
info depth 49 currmove d3f5 currmovenumber 14
info depth 49 currmove f4e3 currmovenumber 15
info depth 49 currmove d1e1 currmovenumber 16
info depth 49 currmove d3g6 currmovenumber 17
info depth 49 currmove c2b2 currmovenumber 18
info depth 49 currmove e2c1 currmovenumber 19
info depth 49 currmove c2b3 currmovenumber 20
info depth 49 currmove f4d2 currmovenumber 21
info depth 49 currmove d1c1 currmovenumber 22
info depth 49 currmove c4c5 currmovenumber 23
info depth 49 currmove c2a4 currmovenumber 24
info depth 49 currmove c2d2 currmovenumber 25
info depth 49 currmove d1f1 currmovenumber 26
info depth 49 currmove h2h3 currmovenumber 27
info depth 49 currmove e2g1 currmovenumber 28
info depth 49 currmove c2c1 currmovenumber 29
info depth 49 currmove f4h6 currmovenumber 30
info depth 49 currmove d1g1 currmovenumber 31
info depth 53 seldepth 89 multipv 1 score cp 257 nodes 378135470397 nps 35341332 hashfull 1000 tbhits 0 time 10699525 pv e2d4 f3h5 g3g4 h5g4 c2d2 f7f6 h1g1 g4h4 g1g3 g7g6 e5f6 b6c4 d3c4 d5c4 f4g5 h4e4 b1a1 c8d7 d4c2 d7a4 c2a3 a4d1 d2d1 e4d5 d1e1 f8f7 a3c2 a8d8 g3g1 d5d3 c2e3 h7h5 e1c1 d3e4 f2f3 e4f3 e3c4 d8d5 c1e1 d5g5 g1g5 f7f6 g5g1 g8h7 c4d6 f3f2 d6e4 f2e1 g1e1 f6f5 e1e2 h7g7 e4d6 f5c5 c3c4 e6e5 a1b2 c5c6 e2d2 a7a6 b2c3 b7b6 h2h4 g7f6 d6e4 f6f5 d2e2 f5f4
info depth 54 currmove e2d4 currmovenumber 1
info depth 54 seldepth 69 multipv 1 score cp 266 lowerbound nodes 388633091362 nps 35363664 hashfull 1000 tbhits 0 time 10989616 pv e2d4
info depth 53 currmove e2d4 currmovenumber 1
info depth 54 seldepth 69 multipv 1 score cp 276 lowerbound nodes 397857383112 nps 35384035 hashfull 1000 tbhits 0 time 11243980 pv e2d4
info depth 52 currmove e2d4 currmovenumber 1
info depth 54 seldepth 69 multipv 1 score cp 290 lowerbound nodes 411841830453 nps 35413902 hashfull 1000 tbhits 0 time 11629383 pv e2d4
info depth 51 currmove e2d4 currmovenumber 1
info depth 54 seldepth 94 multipv 1 score cp 309 lowerbound nodes 450565125148 nps 35507171 hashfull 1000 tbhits 0 time 12689412 pv e2d4
info depth 50 currmove e2d4 currmovenumber 1
info depth 50 currmove d3h7 currmovenumber 2
info depth 50 currmove c4d5 currmovenumber 3
info depth 50 currmove g3g4 currmovenumber 4
info depth 50 currmove d3e4 currmovenumber 5
info depth 50 currmove d1g1 currmovenumber 6
info depth 50 currmove b1a1 currmovenumber 7
info depth 50 currmove h2h3 currmovenumber 8
info depth 50 currmove f4c1 currmovenumber 9
info depth 50 currmove f4d2 currmovenumber 10
info depth 50 currmove h1g1 currmovenumber 11
info depth 50 currmove f4h6 currmovenumber 12
info depth 50 currmove h2h4 currmovenumber 13
info depth 50 currmove c2a4 currmovenumber 14
info depth 50 currmove c4c5 currmovenumber 15
info depth 50 currmove c2d2 currmovenumber 16
info depth 50 currmove h1e1 currmovenumber 17
info depth 50 currmove f4e3 currmovenumber 18
info depth 50 currmove h1f1 currmovenumber 19
info depth 50 currmove f4g5 currmovenumber 20
info depth 50 currmove c2b2 currmovenumber 21
info depth 50 currmove d1d2 currmovenumber 22
info depth 50 currmove d1e1 currmovenumber 23
info depth 50 currmove d1c1 currmovenumber 24
info depth 50 currmove c2c1 currmovenumber 25
info depth 50 currmove d3g6 currmovenumber 26
info depth 50 currmove c2b3 currmovenumber 27
info depth 50 currmove d1f1 currmovenumber 28
info depth 50 currmove e2c1 currmovenumber 29
info depth 50 currmove d3f5 currmovenumber 30
info depth 50 currmove e2g1 currmovenumber 31
info depth 54 seldepth 95 multipv 1 score cp 312 nodes 476335900855 nps 35554483 hashfull 1000 tbhits 0 time 13397351 pv e2d4 f3h5 g3g4 h5g4 c2d2 f7f6 h1g1 g4h5 f4h6 f8f7 e5f6 g7g6 c4d5 b6d5 h2h4 c8d7 h6g5 a8c8 d3e2 d5c3 d2c3 c8c3 e2h5 e6e5 d4b3 d7f5 b1a1 c3c2 h5g4 c2f2 g4f5 f2f5 a1b1 h7h6 g5h6 f5f6 h6e3 g8f8 b3d2 f6e6 d2c4 a3e7 d1d5 f8e8 d5e5 e6e5 c4e5 f7f5 e5g6 e7f6 b1c2 e8f7 g1g4 f5a5 c2b3 a5b5 b3c4 b5a5 g4g2 b7b6 c4d3 a5a3 d3e4 a3a4 e4d5 a4a5 d5c6 a5a3 e3d2 a3a2 h4h5 a2a4 c6d6 b6b5

[Paloma]

Hi Louis,

Why jumps in your output the depth high down high down ??

info depth 52 ... time 8192164
then
info depth 49
info depth 52 ... time 8219916
info depth 48
info depth 52 ... time 8370455
info depth 47
info depth 52
info depth 46
info depth 52
info depth 45
...
info depth 52
info depth 53
info depth 52
info depth 51
info depth 53 ... time 10034476
info depth 50
and so on ..

The time consumption is constantly increasing but the depth flutters back and forth.

[zullil]

Hi Louis,

Why jumps in your output the depth high down high down ??

info depth 52 ... time 8192164
then
info depth 49
info depth 52 ... time 8219916
info depth 48
info depth 52 ... time 8370455
info depth 47
info depth 52
info depth 46
info depth 52
info depth 45
...
info depth 52
info depth 53
info depth 52
info depth 51
info depth 53 ... time 10034476
info depth 50
and so on ..

The time consumption is constantly increasing but the depth flutters back and forth.

This has been standard behavior in Stockfish since October 2018. See https://github.com/official-stockfish/S ... a96ee15f64

[Paloma]

Upps...

I've never seen or paid attention to it before.

Thanks