Re: One more issue with king safety/attack for Stockfish
Posted: Wed Jul 17, 2019 11:12 am
38 searches for the toilette
Computer Chess Club
https://talkchess.com/
Code: Select all
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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)
As expected, not due to a single commit. Already worse than Stockfish-10 by the end of April 2019.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!zullil wrote: ↑Wed Jul 17, 2019 3:38 pmzullil 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 ...
Perhaps multicore luck? The same Stockfish 140719 64 BMI2 needs here with 1 thread depth 37 and about 4 minutes to find Qg6.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 ?
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)
All my searches were done with default settings: 1 thread (so, deterministic) and 16 MB hash. Otherwise,depths and node counts will vary widely.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 ?