One more issue with king safety/attack for Stockfish

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mclane
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Re: One more issue with king safety/attack for Stockfish

Post by mclane »

38 searches for the toilette
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Here we have a fairy tale of the day after tomorrow....
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zullil
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Re: One more issue with king safety/attack for Stockfish

Post by zullil »

[d]2kr3r/p5p1/2pq4/n1b1pb2/4N1p1/3PB1P1/PPP1BPK1/R3QR2 b - - 0 20

Latest Stockfish-dev takes much longer than Stockfish-10 to find 20...Qg6!.

Stockfish-10:
info depth 29 seldepth 33 multipv 1 score cp -319 lowerbound nodes 30244620 nps 1924815 hashfull 999 tbhits 0 time 15713 pv d6g6

Stockfish-dev:
info depth 35 seldepth 51 multipv 1 score cp -365 lowerbound nodes 171929033 nps 2037387 hashfull 1000 tbhits 0 time 84387 pv d6g6

One now wonders if this change is the result of one particular change made since the release of Stockfish-10 ...
Last edited by zullil on Wed Jul 17, 2019 1:40 pm, edited 1 time in total.
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zullil
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Re: One more issue with king safety/attack for Stockfish

Post by zullil »

mclane wrote: ↑Wed Jul 17, 2019 11:12 am 38 searches for the toilette
Indeed. So now we might ask why. :wink:
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Re: One more issue with king safety/attack for Stockfish

Post by mclane »

Take a look in the millions of million Nodes :-) and bugfix the evaluation.
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Max
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Re: One more issue with king safety/attack for Stockfish

Post by Max »

[d]2kr3r/p5p1/2pq4/n1b1pb2/4N1p1/3PB1P1/PPP1BPK1/R3QR2 b - - 0 20
Hakkapeliitta TCEC v2 (1 thread, 512MB hash) needs 5s and switches at depth 22 to Qg6 :D

Code: Select all

...
21 [+2.14]  20.... Bxe4+ 21.dxe4  (3.29)
21 [+2.28]  20.... Bxe4+ 21.dxe4 Bxe3 22.Bxg4+ Kb8 23.Qxe3 Qd4 24.Qxd4 Rxd4 25.Rad1 Rc4 26.c3 Rxe4 27.Be6 Rh6 28.Kf3 Ra4 29.Rd8+ Kc7 30.Re8 Nb7 31.Re1 Rf6+ 32.Kg2  (3.32)
22 [+2.12]  20.... Bxe4+ 21.dxe4  (4.08)
22 [+2.15]  20.... Bxe4+ 21.dxe4 Bxe3 22.Bxg4+ Kb8 23.Qxe3 Qd4 24.Qxd4 Rxd4 25.Rad1 Rc4 26.c3 Rxe4 27.Be6 Rh6 28.Kf3 Ra4 29.Rd8+ Kc7 30.Re8 Nb7 31.Re1 Rf6+ 32.Kg2 Nd6 33.Re7+ Kd8  (4.21)
22 [+1.96]  20.... Qg6 21.Bxc5  (5.31)
22 [-2.44]  20.... Qg6 21.Bg5 Bxe4+ 22.dxe4 Qxe4+ 23.f3 gxf3+ 24.Bxf3 Qf5 25.Bh4 Nc4 26.Bxc6 Qxc2+ 27.Kh3 Rd2 28.Be4 Rh2+ 29.Kg4 Qxb2 30.Rc1 Qd4 31.Kg5 Nd6 32.Bf5+ Nxf5 33.Kxf5 Qd7+ 34.Kg6  (20.12)
23 [-2.32]  20.... Qg6 21.Bg5 Bxe4+ 22.dxe4 Qxe4+ 23.f3 gxf3+ 24.Bxf3 Qf5 25.Bh4 Nc4 26.Bxc6 Qxc2+ 27.Kh3 Rd2 28.Be4 Rh2+ 29.Kg4 Qxb2 30.Rb1 Ne3+ 31.Qxe3 Bxe3 32.Rxb2 Rxb2 33.Rf3 Bd4 34.Bd5 Rd2 35.Rf7 e4 36.Bxe4 Rxa2  (23.19)
24 [-2.16]  20.... Qg6 21.Bg5  (26.43)
24 [-2.30]  20.... Qg6 21.Bg5 Bxe4+ 22.dxe4 Qxe4+ 23.f3 gxf3+ 24.Bxf3 Qf5 25.Bh4 Nc4 26.Bxc6 Qxc2+ 27.Kh3 Rd2 28.Be4 Rh2+ 29.Kg4 Qxb2 30.Rb1 Ne3+ 31.Qxe3 Bxe3 32.Rxb2 Rxb2 33.Rf7 Rxa2 34.Rxg7 Rd2 35.Bf5+ Kb8 36.Bf6 Bd4  (28.08)
25 [-2.14]  20.... Qg6 21.Bg5  (29.29)
25 [-2.44]  20.... Qg6 21.Bg5 Bxe4+ 22.dxe4 Qxe4+ 23.f3 gxf3+ 24.Bxf3 Qf5 25.Bh4 Nc4 26.Bxc6 Qxc2+ 27.Kh3 Rd2 28.Be4 Qxb2 29.Rb1 Rh2+ 30.Kg4 Ne3+ 31.Qxe3 Bxe3 32.Rxb2 Rxb2 33.Rf7 Rxa2 34.Rxg7 Rf2 35.Bf5+ Kb8 36.Bf6 Bd4 37.Re7 Rhh2 38.Bxe5+ Bxe5 39.Rxe5  (32.58)
27 [-2.28]  20.... Qg6 21.Bg5  (43.15)
27 [-2.49]  20.... Qg6 21.Bg5 Bxe4+ 22.dxe4 Qxe4+ 23.f3 gxf3+ 24.Bxf3 Qf5 25.Bh4 Nc4 26.Bxc6 Qxc2+ 27.Kh3 Rd2 28.Be4 Qxb2 29.Rh1 g5 30.Rc1 gxh4 31.Rxc4 hxg3+ 32.Kxg3 Rg8+ 33.Kh3 Qa3+ 34.Kh4 Rd4 35.Rxd4 exd4 36.Qf2  (48.78)
28 [-2.33]  20.... Qg6 21.Bg5  (52.70)

[-2.33 ]  Depth: 28/43  Nodes: 212721K (4036 kn/s) Time:  52.70 s
NPS: 4036000  Hash: 84%  Load: ---- TB hits: 50 Current: Qg6 (1/46)
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zullil
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Re: One more issue with king safety/attack for Stockfish

Post by zullil »

zullil wrote: ↑Wed Jul 17, 2019 1:35 pm [d]2kr3r/p5p1/2pq4/n1b1pb2/4N1p1/3PB1P1/PPP1BPK1/R3QR2 b - - 0 20

Latest Stockfish-dev takes much longer than Stockfish-10 to find 20...Qg6!.

Stockfish-10:
info depth 29 seldepth 33 multipv 1 score cp -319 lowerbound nodes 30244620 nps 1924815 hashfull 999 tbhits 0 time 15713 pv d6g6

Stockfish-dev:
info depth 35 seldepth 51 multipv 1 score cp -365 lowerbound nodes 171929033 nps 2037387 hashfull 1000 tbhits 0 time 84387 pv d6g6

One now wonders if this change is the result of one particular change made since the release of Stockfish-10 ...
As expected, not due to a single commit. Already worse than Stockfish-10 by the end of April 2019.

Stockfish-7ede1ed0716744270544dcb1ee71ca907c6d9c23
info depth 33 seldepth 54 multipv 1 score cp -347 lowerbound nodes 124260090 nps 1928157 hashfull 1000 tbhits 0 time 64445 pv d6g6

Yet better than Stockfish-10 at the end of January 2019:

Stockfish-d1fd1a96bc62346b727dd3797df429f7e627f5ef
info depth 25 seldepth 39 multipv 1 score cp -322 lowerbound nodes 11799030 nps 1760261 hashfull 1000 tbhits 0 time 6703 pv d6g6
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zullil
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Re: One more issue with king safety/attack for Stockfish

Post by zullil »

zullil wrote: ↑Wed Jul 17, 2019 3:38 pm
zullil wrote: ↑Wed Jul 17, 2019 1:35 pm [d]2kr3r/p5p1/2pq4/n1b1pb2/4N1p1/3PB1P1/PPP1BPK1/R3QR2 b - - 0 20

Latest Stockfish-dev takes much longer than Stockfish-10 to find 20...Qg6!.

Stockfish-10:
info depth 29 seldepth 33 multipv 1 score cp -319 lowerbound nodes 30244620 nps 1924815 hashfull 999 tbhits 0 time 15713 pv d6g6

Stockfish-dev:
info depth 35 seldepth 51 multipv 1 score cp -365 lowerbound nodes 171929033 nps 2037387 hashfull 1000 tbhits 0 time 84387 pv d6g6

One now wonders if this change is the result of one particular change made since the release of Stockfish-10 ...
Here's a month-by-month summary ... which shows that studying one particular position is not very useful!

End of November 2018:
Stockfish-10:
info depth 29 seldepth 33 multipv 1 score cp -319 lowerbound nodes 30244620 nps 1924815 hashfull 999 tbhits 0 time 15713 pv d6g6

End of December 2018:
Stockfish-800031c94c655e64e436846911e599de6eb35a72
info depth 31 seldepth 52 multipv 1 score cp -353 lowerbound nodes 85511699 nps 1996351 hashfull 1000 tbhits 0 time 42834 pv d6g6

End of January 2019:
Stockfish-d1fd1a96bc62346b727dd3797df429f7e627f5ef
info depth 25 seldepth 39 multipv 1 score cp -322 lowerbound nodes 11799030 nps 1760261 hashfull 1000 tbhits 0 time 6703 pv d6g6

End of February 2019:
Stockfish-82ff04b992a53c757519a6ff61576ebd267c0cee
info depth 28 seldepth 53 multipv 1 score cp -336 lowerbound nodes 27027003 nps 1926646 hashfull 1000 tbhits 0 time 14028 pv d6g6

End of March 2019:
Stockfish-82ad9ce9cfb0eff33f1d781f329f7c5dc0b277eb
info depth 29 seldepth 48 multipv 1 score cp -336 lowerbound nodes 60299288 nps 1795102 hashfull 1000 tbhits 0 time 33591 pv d6g6

End of April 2019:
Stockfish-7ede1ed0716744270544dcb1ee71ca907c6d9c23
info depth 33 seldepth 54 multipv 1 score cp -347 lowerbound nodes 124260090 nps 1928157 hashfull 1000 tbhits 0 time 64445 pv d6g6

End of May 2019:
Stockfish-3edf0e6b37df9c81ea1a4cd3affd11548547815b
info depth 34 seldepth 53 multipv 1 score cp -350 lowerbound nodes 256801114 nps 1900527 hashfull 1000 tbhits 0 time 135121 pv d6g6

End of June 2019:
Stockfish-79d06d8840110713ca135ca53f2347a57c6494e2
info depth 34 seldepth 45 multipv 1 score cp -353 lowerbound nodes 147943457 nps 1905260 hashfull 1000 tbhits 0 time 77650 pv d6g6

July 17, 2019 (Stockfish-dev, as above):
Stockfish-dev:
info depth 35 seldepth 51 multipv 1 score cp -365 lowerbound nodes 171929033 nps 2037387 hashfull 1000 tbhits 0 time 84387 pv d6g6
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Spliffjiffer
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Re: One more issue with king safety/attack for Stockfish

Post by Spliffjiffer »

i dont wanna talk away the problems SF has when it comes to sacrifices in terms of make kings naked but "my" latest SF ("Fix bench", Sun Jul 14 15:21:08 2019 +0200 by MC) finds Qg6 in about 13 seconds (tried 2 times) on an old APU 7870k-4 cores-CPU while SF10 needs much longer in this particular case...maybe just a compiler issue though or even pure luck ?
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Max
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Re: One more issue with king safety/attack for Stockfish

Post by Max »

Spliffjiffer wrote: ↑Wed Jul 17, 2019 4:35 pm i dont wanna talk away the problems SF has when it comes to sacrifices in terms of make kings naked but "my" latest SF ("Fix bench", Sun Jul 14 15:21:08 2019 +0200 by MC) finds Qg6 in about 13 seconds (tried 2 times) on an old APU 7870k-4 cores-CPU while SF10 needs much longer in this particular case...maybe just a compiler issue though or even pure luck ?
Perhaps multicore luck? The same Stockfish 140719 64 BMI2 needs here with 1 thread depth 37 and about 4 minutes to find Qg6.

Code: Select all

26 [+3.22]  20.... Bxe4+ 21.dxe4 Bb6 22.Bxg4+ Kb8 23.Rd1 Qg6 24.Rxd8+ Rxd8 25.Bf5 Qf6 26.Qc3 Bxe3 27.Qxe3 Nb7 28.Rh1 Nd6 29.Rh7 Kb7 30.a4 Nxf5 31.exf5 Rd7 32.Qb3+ Kc7 33.Qe6 Qxe6 34.fxe6 Re7 35.b4 Kd6  (5.92)
27 [+3.31]  20.... Bxe4+ 21.dxe4  (7.02)
27 [+3.43]  20.... Bxe4+  (12.59)
27 [+3.75]  20.... Bxe4+ 21.dxe4  (13.96)
27 [+3.46]  20.... Bxe4+  (16.12)
27 [+3.58]  20.... Bxe4+ 21.dxe4 Bxe3 22.Bxg4+ Kb8 23.Qxe3 Qd4 24.Qg5 Qd6 25.Rad1 Qf6 26.Rxd8+ Rxd8 27.Qe3 Nb7 28.Rh1 Nd6 29.Rd1 Nb7 30.Rxd8+ Qxd8 31.Qc3 Qd6 32.b4 c5 33.a4 Ka8 34.b5 Qd4 35.Qxd4 cxd4  (16.54)
28 [+3.49]  20.... Bxe4+  (17.42)
28 [+3.68]  20.... Bxe4+ 21.dxe4  (19.13)
28 [+3.46]  20.... Bxe4+  (24.02)
28 [+3.45]  20.... Bxe4+ 21.dxe4 Nb7 22.Bxg4+ Kc7 23.Bg5 Rdf8 24.Bf5 Qd4 25.Rd1 Qxb2 26.Rd7+ Kb8 27.Qb1 Qb5 28.Qxb5 cxb5 29.f4 Rc8 30.fxe5 Bb6 31.Rd2 Nc5 32.Bxc8 Kxc8 33.Rdf2 Nxe4 34.Rf8+ Rxf8 35.Rxf8+ Kd7 36.Rf7+ Ke6 37.Rxg7 Kxe5 38.Bf4+ Kf6  (26.64)
29 [+3.54]  20.... Bxe4+ 21.dxe4  (30.44)
29 [+3.82]  20.... Bxe4+ 21.dxe4 Nb7 22.Bxg4+ Kb8 23.Rd1 Qe7 24.Rxd8+ Rxd8 25.Rh1 Rf8 26.Rh7 Bb6 27.Qc3 Qf6 28.Bf5 Bxe3 29.Qxe3 c5 30.Qc3 Rd8 31.Rh1 a6 32.b4 Qd6 33.Rb1 Ka7 34.b5 axb5 35.Rxb5 Qa6 36.Rb1 g6 37.Bh3  (39.56)
30 [+3.72]  20.... Bxe4+  (47.57)
30 [+3.91]  20.... Bxe4+ 21.dxe4  (49.23)
30 [+3.77]  20.... Bxe4+  (50.61)
30 [+3.92]  20.... Bxe4+ 21.dxe4 Bb6 22.Bxg4+ Kb8 23.Rd1 Qg6 24.Rxd8+ Rxd8 25.Bf5 Qf6 26.Qc3 Nb7 27.Rh1 Rf8 28.Rh5 Bxe3 29.Qxe3 Ka8 30.Rh7 Kb8 31.Qc3 c5 32.Rh5 a5 33.Rh7 Ka7 34.a3 Rd8 35.b4 axb4  (54.33)
31 [+3.83]  20.... Bxe4+  (55.84)
31 [+3.82]  20.... Bxe4+ 21.dxe4 Bb6 22.Bxg4+ Kb8 23.Rd1 Qg6 24.Rxd8+ Rxd8 25.Bf5 Qf7 26.Qc3 Bxe3 27.Qxe3 Nb7 28.Qc3 Qf6 29.Rh1 Nd6 30.Qxc6 Nxf5 31.Qb5+ Kc7 32.Qc5+ Kb7 33.exf5 Qxf5 34.Qb5+ Kc7 35.Rh4 Qd7 36.Qxe5+ Kb7 37.Rb4+ Ka8 38.Rc4 Qb7+ 39.f3 Qd5 40.Qe4 Qxe4 41.fxe4  (58.81)
32 [+3.72]  20.... Bxe4+  (63.63)
32 [+3.91]  20.... Bxe4+ 21.dxe4  (68.98)
32 [+3.88]  20.... Bxe4+ 21.dxe4 Bb6 22.Bxg4+ Kb8 23.Rd1 Qg6 24.Rxd8+ Rxd8 25.Bf5 Qf7 26.Qc3 Bxe3 27.Qxe3 Nb7 28.Qc3 Qf6 29.Rh1 c5 30.Rh7 Rf8 31.Qb3 a6 32.a3 Rd8 33.Qc3 Rf8 34.b4 cxb4 35.Qxb4 Ka8 36.Qc3 Kb8 37.a4 Nd6 38.Rh5 Nxf5 39.Qb4+ Ka7 40.Qc5+ Kb7 41.Rxf5  (83.84)
33 [+3.78]  20.... Bxe4+  (87.45)
33 [+3.75]  20.... Bxe4+ 21.dxe4 Bb6 22.Bxg4+ Kb8 23.Rd1 Qg6 24.Rxd8+ Rxd8 25.Bf5 Qd6 26.Rh1 Nc4 27.Bg5 Rg8 28.Qe2 Qc5 29.b4 Qb5 30.a4 Ne3+ 31.Qxe3 Bxe3 32.axb5 Bxg5 33.Be6 Re8 34.Bd7 Rd8 35.bxc6 a5 36.bxa5 Kc7 37.Rd1 Rb8 38.Rd5 Bf6 39.Kg1 Rh8 40.Rb5 g6 41.c3 Ra8  (88.54)
34 [+3.65]  20.... Bxe4+  (89.67)
34 [+3.84]  20.... Bxe4+ 21.dxe4  (92.19)
34 [+3.70]  20.... Bxe4+  (110.93)
34 [+3.70]  20.... Bxe4+ 21.dxe4 Nb7 22.Bxg4+ Kc7 23.Rd1 Qe7 24.Rxd8 Rxd8 25.Rh1 Bxe3 26.Qxe3 a5 27.Rh5 Rd4 28.Bf5 Rd8 29.Rh7 Rd6 30.a3 c5 31.Qc3 Rh6 32.Rxh6 gxh6 33.Qb3 Nd8 34.Qb5 Nb7 35.c3 Qd6 36.Qe8 Kb6 37.Bg4 Qc7 38.Be2 Nd6  (111.73)
35 [+3.80]  20.... Bxe4+ 21.dxe4  (131.14)
35 [+3.97]  20.... Bxe4+ 21.dxe4 Nb7 22.Bxg4+ Kb8 23.Rd1 Qe7 24.Rxd8+ Rxd8 25.Rh1 Rf8 26.Rh7 Bb6 27.Qc3 Qf6 28.Bf5 Bxe3 29.Qxe3 Nd6 30.Rh5 Qe7 31.Bg4 Re8 32.Rh7 Qf6 33.Rh1 Nb7 34.Rh5 Qg6 35.Qf3 a5 36.Bd7 Rd8 37.Bf5 Qf6 38.Qe3 c5 39.Qb3 Kc7 40.Bg4 Rf8 41.f4 exf4 42.Rf5  (182.27)
36 [+3.97]  20.... Bxe4+ 21.dxe4 Nb7 22.Bxg4+ Kb8 23.Rd1 Qe7 24.Rxd8+ Rxd8 25.Rh1 Rf8 26.Rh7 Bb6 27.Qc3 Qf6 28.Bf5 Bxe3 29.Qxe3 Nd6 30.Rh5 Qe7 31.Bg4 Re8 32.Rh7 Qf6 33.Rh1 Nb7 34.Bf5 Nd6 35.Bd7 Rf8 36.Rh5 Qf7 37.Bg4 Qg6 38.Bf3 Re8 39.a4 Qe6 40.Qc3 Kc7 41.Qc5 Kb8 42.Qxc6 Rc8 43.Qa6  (202.20)
37 [+3.88]  20.... Bxe4+  (211.94)
37 [+3.78]  20.... Qg6  (242.36)
37 [-3.35]  20.... Qg6 21.Rh1 Rxh1 22.Qxh1 Bxe3 23.Qh4 Nc4 24.Re1 Bd2 25.Nxd2 Nxd2 26.Kg1 Rf8 27.Rd1 Nf3+ 28.Bxf3 gxf3 29.Re1 Qf6 30.Re3 Bd7 31.Qxf6 gxf6 32.Rxf3 Kc7 33.Re3 Be6  (246.71)
38 [-3.45]  20.... Qg6  (255.49)
38 [-4.96]  20.... Qg6 21.Rh1 Rxh1 22.Qxh1 Bxe3 23.Qh4 Nc4 24.Kg1 Bb6 25.a4 Bxe4 26.dxe4 Rf8 27.Rf1 Qxe4 28.Qxg4+ Qxg4 29.Bxg4+ Kc7 30.a5 Bc5 31.b4 Bxb4 32.Be6 Nd6 33.a6 Bc5 34.Kg2 Kb6 35.f3 Nf5 36.Rb1+ Kxa6 37.g4 Ne3+ 38.Kg3 Bd4 39.Kf2 Rh8 40.Kg3  (288.38)
39 [-4.96]  20.... Qg6 21.Rh1 Rxh1 22.Qxh1 Bxe3 23.Qh4 Nc4 24.Kg1 Bb6 25.a4 Bxe4 26.dxe4 Rf8 27.Rf1 Qxe4 28.Qxg4+ Qxg4 29.Bxg4+ Kc7 30.a5 Bc5 31.b4 Bxb4 32.Be6 Nd6 33.a6 Bc5 34.Kg2 Kb6 35.f3 Nf5 36.Rb1+ Kxa6 37.g4 Ne3+ 38.Kg3 Bd4 39.Kf2 Rh8 40.Kg3  (292.99)

[-4.96 ]  Depth: 39/59  Nodes: 448540K (1531 kn/s) Time: 292.99 s
NPS: 1530918  Hash: 100%  Load: ---- TB hits: 1248 Current: Qg6 (1/46)
Hope we're not just the biological boot loader for digital super intelligence. Unfortunately, that is increasingly probable - Elon Musk
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zullil
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Re: One more issue with king safety/attack for Stockfish

Post by zullil »

Spliffjiffer wrote: ↑Wed Jul 17, 2019 4:35 pm i dont wanna talk away the problems SF has when it comes to sacrifices in terms of make kings naked but "my" latest SF ("Fix bench", Sun Jul 14 15:21:08 2019 +0200 by MC) finds Qg6 in about 13 seconds (tried 2 times) on an old APU 7870k-4 cores-CPU while SF10 needs much longer in this particular case...maybe just a compiler issue though or even pure luck ?
All my searches were done with default settings: 1 thread (so, deterministic) and 16 MB hash. Otherwise,depths and node counts will vary widely.

Here's Stockfish-dev with 20 threads and 1 GB hash:

info depth 23 seldepth 41 multipv 1 score cp 391 nodes 53397964 nps 29698533 hashfull 339 tbhits 0 time 1798 pv d6g6 f1h1 h8h1 e1h1 c5e3 g2g1 e3b6 a2a4 a5b7 c2c3 c8c7 a4a5 b6a5 b2b4 a5b6 a1d1 b7d6

And now another search with the same parameters:

info depth 32 seldepth 51 multipv 1 score cp -405 lowerbound nodes 1020494832 nps 35707856 hashfull 1000 tbhits 0 time 28579 pv d6g6
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