Where are your move- numbers from, do you have the source of the game
Testposition King Safety
Moderators: hgm, Rebel, chrisw
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peter
- Posts: 3186
- Joined: Sat Feb 16, 2008 7:38 am
- Full name: Peter Martan
Re: Testposition King Safety
Hi!
Where are your move- numbers from, do you have the source of the game
Where are your move- numbers from, do you have the source of the game
Peter.
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tpoppins
- Posts: 919
- Joined: Tue Nov 24, 2015 9:11 pm
- Location: upstate
Re: Testposition King Safety
The move numbers follow the complete FEN provided in the first post of this thread.
The game is not in Megabase 2016 nor in CCRL's 40/40 archive. The OP in the fishcooking thread may know where the game is from, perhaps Eelco could ask him over there.
The game is not in Megabase 2016 nor in CCRL's 40/40 archive. The OP in the fishcooking thread may know where the game is from, perhaps Eelco could ask him over there.
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ernst
- Posts: 352
- Joined: Thu Mar 09, 2006 6:00 pm
Re: Testposition King Safety
SF dev. after a night of thinking produced the following result.
Code: Select all
24/30 0:01 +0.03 1.O-O Nxd3 2.cxd3 Bd7 3.Rc1 Nc6 4.Qd2 Nxd4 5.Bxd4 Qa5 6.h4 Rac8 7.a3 Rc6 8.h5 Rfc8 9.Kh2 Qd8 10.Qg2 Qf8 11.Rg1 Kh8 12.Qf2 Kg8 13.h6 gxh6 (16.286.089) 8836
25/31 0:03 +0.08 1.O-O Nxd3 2.cxd3 Bd7 3.Rc1 Nc6 4.Nxc6 Bxc6 5.Ne2 Rfc8 6.Nd4 Qb6 7.Nf5 Qd8 8.Nxe7+ Qxe7 9.Bc5 Qd7 10.Bd4 Bb5 11.Qd2 Rxc1 12.Rxc1 Rc8 13.Rxc8+ Qxc8 14.Qe3 (31.618.929) 8889
26/37 0:06 0.00-- 1.O-O Nxd3 (60.171.020) 8934
26/37 0:10 0.00 1.O-O Nxd3 2.cxd3 Bd7 3.Rc1 Nc6 4.Nxc6 Bxc6 5.Ne2 Qa5 6.Nd4 Bd7 7.Qe2 Rfc8 8.a3 Qa4 9.Ra1 Qa5 10.Rac1 (89.975.207) 8948
27/37 0:11 0.00 1.O-O Nxd3 2.cxd3 Bd7 3.Qh5 Rc8 4.Rf3 g6 5.Qh6 Bf8 6.Qh4 Be7 7.Qh6 (104.437.777) 8928
28/38 0:13 0.00 1.O-O Nxd3 2.cxd3 Bd7 3.Qh5 Rc8 4.Rf3 g6 5.Qh6 Bf8 6.Qh4 Be7 7.Qh6 (121.895.352) 8911
29/38 0:21 0.00 1.O-O Nxd3 2.cxd3 Bd7 3.Qh5 Rc8 4.Rf3 g6 5.Qh6 Bf8 6.Qh4 Be7 7.Qh6 (193.318.591) 8929
30/41 0:23 0.00 1.O-O Nxd3 2.cxd3 Bd7 3.Qh5 Rc8 4.Rf3 g6 5.Qh6 Bf8 6.Qh4 Be7 7.Qh6 (213.970.201) 8928
31/43 0:32 0.00 1.O-O Nxd3 2.cxd3 Bd7 3.Qh5 Rc8 4.Rf3 g6 5.Qh6 Bf8 6.Qh4 Be7 7.Qh6 (290.755.491) 8977
32/43 0:35 +0.07++ 1.O-O (316.479.064) 8984
32/43 0:39 +0.14++ 1.O-O (355.728.390) 9010
32/43 0:45 +0.07-- 1.O-O Nxd3 (406.998.194) 9000
32/45 2:16 +0.16++ 1.O-O (1.222.425.592) 8931
32/50 3:26 +0.04-- 1.O-O Nxd3 (1.849.940.983) 8963
32/50 3:26 0.00 1.O-O Nxd3 2.cxd3 Bd7 3.Qh5 g6 4.Qh6 Rc8 5.Rf3 Bf8 6.Qh4 Be7 7.Qh6 (1.851.598.336) 8963
33/50 3:33 0.00 1.O-O Nxd3 2.cxd3 Bd7 3.Qh5 g6 4.Qh6 Rc8 5.Rf3 Bf8 6.Qh4 Be7 7.Qh6 (1.916.847.652) 8962
34/50 3:41 0.00 1.O-O Nxd3 2.cxd3 Bd7 3.Qh5 g6 4.Qh6 Rc8 5.Rf3 Bf8 6.Qh4 Be7 7.Qh6 (1.989.172.288) 8965
35/50 3:46 0.00 1.O-O Nxd3 2.cxd3 Bd7 3.Qh5 g6 4.Qh6 Rc8 5.Rf3 Bf8 6.Qh4 Be7 7.Qh6 (2.030.205.212) 8967
36/50 3:56 0.00 1.O-O Nxd3 2.cxd3 Bd7 3.Qh5 g6 4.Qh6 Rc8 5.Rf3 Bf8 6.Qh4 Be7 7.Qh6 (2.123.012.859) 8976
37/50 4:56 0.00 1.O-O Nxd3 2.cxd3 Bd7 3.Qh5 g6 4.Qh6 Rc8 5.Rf3 Bf8 6.Qh4 Be7 7.Qh6 (2.673.211.459) 9011 TB:10
38/50 6:05 +0.07++ 1.O-O (3.319.012.697) 9082 TB:12
38/54 7:52 0.00-- 1.O-O Nxd3 (4.307.778.152) 9120 TB:14
38/54 7:53 0.00 1.O-O Nxd3 2.cxd3 Nc6 3.Nxc6 bxc6 4.Rc1 c5 5.Na4 c4 6.Bb6 Qc6 7.dxc4 dxc4 8.Qf3 Qxa4 9.Qxa8 Qb5 10.Qa7 Qc6 11.Qxe7 Bb7 12.Rc2 Qh1+ 13.Kf2 Qxh2+ 14.Ke1 (4.314.900.172) 9121 TB:14
39/54 9:14 0.00 1.O-O Nxd3 2.cxd3 Nc6 3.Nxc6 bxc6 4.Rc1 c5 5.Na4 c4 6.Bb6 Qc6 7.dxc4 dxc4 8.Qf3 Qxa4 9.Qxa8 Qb5 10.Qa7 Qc6 11.Qxe7 Bb7 12.Rc2 Qh1+ 13.Kf2 Qxh2+ 14.Ke1 (5.039.326.472) 9088 TB:22
40/54 21:09 +0.07++ 1.h4 (11.080.374.700) 8729 TB:61
40/60 38:02 0.00-- 1.h4 Nc6 (20.018.784.569) 8771 TB:1.251
40/60 38:56 +0.04 1.h4 Nc6 2.h5 Bd7 3.Be2 Nxd4 4.Qxd4 Bc6 5.h6 g6 6.O-O b5 7.a3 Rfb8 8.Qd2 Nd7 9.Nd1 b4 10.axb4 Rxb4 11.c3 Rbb8 12.Nf2 Nc5 13.Qc2 Nb3 14.Rxa6 (20.512.946.411) 8778 TB:1.253
41/60 42:22 +0.11++ 1.h4 (22.354.462.070) 8793 TB:1.273
41/65 48:59 +0.04-- 1.h4 Nc6 (25.847.365.230) 8793 TB:1.378
41/65 50:50 +0.11++ 1.h4 (26.825.140.296) 8794 TB:1.380
41/65 68:33 +0.13 1.h4 Nc6 2.h5 Qb6 3.Rb1 Nxd3+ 4.Qxd3 Qc7 5.Kf2 b5 6.Nce2 b4 7.Nxc6 Qxc6 8.Nd4 Qb7 9.a3 a5 10.axb4 axb4 11.h6 g6 12.Qb5 Qxb5 13.Nxb5 Bd7 14.Nd6 (35.146.609.200) 8544 TB:2.375
42/65 69:53 +0.06-- 1.h4 Nc6 (35.889.875.300) 8557 TB:2.411
42/65 73:05 +0.08 1.h4 Nc6 2.h5 Qb6 3.Rb1 Nxd3+ 4.Qxd3 Qc7 5.Kf2 b5 6.Nce2 b4 7.Nxc6 Qxc6 8.Nd4 Qb7 9.a3 a5 10.axb4 axb4 11.h6 g6 12.Qb5 Qxb5 13.Nxb5 Bd7 14.Nd6 (37.641.516.928) 8582 TB:2.430
43/65 77:56 +0.01-- 1.h4 Nc6 (40.046.618.453) 8563 TB:2.463
43/65 88:56 +0.08++ 1.h4 (44.506.791.869) 8339 TB:2.699
43/65 94:50 +0.01-- 1.h4 Nc6 (47.009.236.679) 8261 TB:2.701
43/65 96:22 +0.10++ 1.h4 (47.855.115.911) 8275 TB:2.702
43/65 98:40 +0.13 1.h4 Nc6 2.h5 Qb6 3.Rb1 Nxd3+ 4.Qxd3 Qc7 5.Kf2 Bd7 6.h6 g6 7.Nce2 Rfc8 8.a3 b5 9.c3 Na5 10.Kg3 Nc4 11.Nc2 a5 12.Ned4 Nb6 13.Bd2 Rcb8 14.Kg2 (49.162.033.153) 8303 TB:2.797
44/65 102:44 +0.06-- 1.h4 Nc6 (51.411.492.767) 8339 TB:3.068
44/65 107:16 0.00 1.h4 Nc6 2.h5 Qb6 3.Rb1 Nxd3+ 4.Qxd3 Qc7 5.Kf2 Bd7 6.h6 g6 7.Nce2 b5 8.c3 Rfc8 9.Nxc6 Qxc6 10.Qd2 Qb7 11.Nd4 a5 12.Rhc1 Rc4 13.Qd3 Rcc8 14.Kg3 (53.951.745.912) 8381 TB:3.191
45/65 121:00 0.00 1.h4 Nc6 2.h5 Qb6 3.Rb1 Nxd3+ 4.Qxd3 Qc7 5.Kf2 Bd7 6.h6 g6 7.Nce2 b5 8.c3 Rfc8 9.Nxc6 Qxc6 10.Qd2 Qb7 11.Nd4 a5 12.Rhc1 b4 13.cxb4 Bxb4 14.Qe2 (61.611.512.865) 8486 TB:3.583
46/65 147:49 +0.07++ 1.Bxh7+ (76.919.747.696) 8672 TB:4.616
46/65 153:41 +0.14++ 1.Bxh7+ (80.335.129.811) 8711 TB:5.094
46/65 156:06 +0.25++ 1.Bxh7+ (81.752.672.605) 8728 TB:5.822
46/65 159:35 +0.40++ 1.Bxh7+ (83.774.781.059) 8748 TB:6.081
46/65 168:22 +0.61++ 1.Bxh7+ (88.958.332.427) 8805 TB:9.630
46/70 173:37 +0.89++ 1.Bxh7+ (92.021.752.492) 8833 TB:10.716
46/86 176:03 +0.67-- 1.Bxh7+ Kxh7 (93.462.017.073) 8847 TB:11.429
46/86 187:55 +0.97++ 1.Bxh7+ (100.579.412.689) 8920 TB:46.243
46/101 202:28 +1.37 1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.O-O-O Rd8 4.g6 fxg6 5.Qxg6 Bf8 6.Rdg1 Nc6 7.Rg3 Nxd4 8.Bxd4 Qf7 9.Qh6 Ne4 10.Nxe4 dxe4 11.Bb6 Rd7 12.Rhg1 Qf5 13.Bc5 b6 14.Bxf8 (109.347.463.162) 9001 TB:163.350
47/101 224:10 +1.40 1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.O-O-O Rd8 4.g6 fxg6 5.Qxg6 Bf8 6.Rdg1 Nc6 7.Rg3 Ne7 8.Qf6 Nf5 9.Nxf5 exf5 10.Bxc5 Bxc5 11.Rxg7+ Qxg7 12.Qxd8+ Qf8 13.Qxd5+ Kh7 14.Na4 (122.050.776.420) 9074 TB:175.890
48/101 226:49 +1.33-- 1.Bxh7+ Kxh7 (123.683.325.689) 9088 TB:182.130
48/101 227:36 +1.26-- 1.Bxh7+ Kxh7 (124.165.959.214) 9091 TB:185.520
48/101 229:56 +1.33++ 1.Bxh7+ (125.573.812.891) 9101 TB:187.236
48/101 234:45 +1.30 1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.O-O-O Rd8 4.g6 fxg6 5.Qxg6 Bf8 6.Rdg1 Nc6 7.Rg3 Nxd4 8.Bxd4 Qf7 9.Qh6 Ne4 10.Nxe4 dxe4 11.Bb6 Rd7 12.Rhg1 e3 13.Rh3 Qf5 14.Rh5 (128.405.070.355) 9116 TB:188.218
49/101 253:33 +1.37++ 1.Bxh7+ (139.565.834.775) 9174 TB:192.918
49/101 267:18 +1.30-- 1.Bxh7+ Kxh7 (147.683.569.280) 9208 TB:198.167
49/101 272:47 +1.37++ 1.Bxh7+ (150.927.107.482) 9221 TB:200.022
49/101 274:42 +1.28-- 1.Bxh7+ Kxh7 (152.092.635.026) 9227 TB:201.109
49/101 286:07 +1.40++ 1.Bxh7+ (158.894.199.454) 9255 TB:209.225
49/101 305:04 +1.52 1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.O-O-O Ne4 4.Rhf1 g6 5.Qh4 Re8 6.Rf3 Bf8 7.f5 exf5 8.Nxd5 Qxe5 9.Nxf5 Bxf5 10.Bd4 Nd7 11.Bxe5 Nxe5 12.Rf4 Be7 13.Nf6+ Nxf6 14.gxf6 (170.164.904.293) 9296 TB:221.058
50/101 342:45 +1.44-- 1.Bxh7+ Kxh7 (193.015.891.051) 9385 TB:358.988
50/101 345:23 +1.37-- 1.Bxh7+ Kxh7 (194.668.986.874) 9393 TB:359.901
50/101 346:05 +1.44++ 1.Bxh7+ (195.114.358.024) 9395 TB:361.581
50/101 355:00 +1.59 1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.O-O-O Ne4 4.Rhf1 g6 5.Qh4 Re8 6.Rf3 Bf8 7.f5 exf5 8.Nxd5 Qxe5 9.Nxf5 Bxf5 10.Bd4 Nc6 11.Bxe5 Nxe5 12.Rf4 Be7 13.Nf6+ Nxf6 14.gxf6 (200.506.607.280) 9413 TB:388.636
51/101 383:50 +1.59 1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.O-O-O Ne4 4.Rhf1 g6 5.Qh4 Re8 6.Rf3 Bf8 7.f5 exf5 8.Nxd5 Qxe5 9.Nxf5 Bxf5 10.Bd4 Nc6 11.Bxe5 Nxe5 12.Rf4 Be7 13.Nf6+ Nxf6 14.gxf6 (218.210.676.242) 9474 TB:421.454
52/101 395:45 +1.52-- 1.Bxh7+ Kxh7 (225.461.192.556) 9494 TB:429.409
52/101 406:12 +1.59++ 1.Bxh7+ (231.863.370.474) 9513 TB:455.577
52/101 410:42 +1.52-- 1.Bxh7+ Kxh7 (234.680.300.698) 9523 TB:462.050
52/101 419:03 +1.60++ 1.Bxh7+ (239.842.807.976) 9538 TB:467.687
52/101 423:26 +1.57 1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.O-O-O Ne4 4.Rhf1 g6 5.Qh4 Re8 6.Rf3 Bf8 7.f5 exf5 8.Nxd5 Qxe5 9.Nxf5 Bxf5 10.Bd4 Nc6 11.Bxe5 Nxe5 12.Rf4 Be7 13.Nf6+ Nxf6 14.gxf6 (242.550.689.811) 9546 TB:474.169
53/101 436:12 +1.50-- 1.Bxh7+ Kxh7 (250.551.493.868) 9572 TB:514.076
53/101 440:29 +1.43-- 1.Bxh7+ Kxh7 (253.220.255.366) 9580 TB:541.214
53/101 465:07 +1.50++ 1.Bxh7+ (268.373.384.808) 9616 TB:607.431
53/101 504:06 +1.62 1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.O-O-O Rd8 4.g6 fxg6 5.Qxg6 Bf8 6.Rdg1 Nc6 7.Rg3 Nxd4 8.Bxd4 Qf7 9.Qh6 Ne4 10.Nxe4 dxe4 11.Bb6 Rd7 12.Rhg1 e3 13.Rh3 Qf5 14.Rh5 (292.165.029.861) 9659 TB:723.401
54/101 510:09 +1.54-- 1.Bxh7+ Kxh7 (295.941.526.296) 9668 TB:727.966
54/101 519:38 +1.47-- 1.Bxh7+ Kxh7 (301.965.309.065) 9684 TB:733.891
54/101 532:52 +1.36-- 1.Bxh7+ Kxh7 (310.169.528.429) 9700 TB:755.211
54/101 546:27 +1.45++ 1.Bxh7+ (318.631.338.264) 9718 TB:779.584
54/101 577:31 +1.55 1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.O-O-O Ne4 4.Rhf1 g6 5.Qh4 Re8 6.Rf3 Bf8 7.f5 exf5 8.Nxd5 Qxe5 9.Nxf5 Bxf5 10.Bd4 Nc6 11.Bxe5 Nxe5 12.Rf4 Be7 13.Nf6+ Nxf6 14.gxf6 (338.109.924.927) 9757 TB:881.455
best move: Bd3xh7 time: 620:13.360 min n/s: 9.757.432 nodes: 364.607.691.267 TB: 881.455
This post may either be cause or result of misunderstandings.
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peter
- Posts: 3186
- Joined: Sat Feb 16, 2008 7:38 am
- Full name: Peter Martan
Re: Testposition King Safety
Hi!
1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.0–0–0 Ne4 4.Rhf1 g6 5.Qh4 Re8 6.Rf3 Bf8 7.Nxe4 dxe4 8.Rh3 Bg7 9.Qh7+ Kf8 10.Bf2
At the end of that line I get this output:
[D]rnb1rk2/1pq2pbQ/p3p1p1/4P1P1/3NpP2/7R/PPP2B1P/2KR4 b - - 0 1
Analysis by pedantFishW_2016-10-17_popcnt:
10...b6 11.Rc3 Qe7 12.h4 Ra7 13.Nf5 exf5 14.Bxb6 Be6 15.Bc5 Qxc5 16.Rxc5 Rae7 17.h5 gxh5 18.Qxh5 Rd7 19.Rxd7 Nxd7 20.Rc7 Nb6 21.g6 Nd5 22.Rxf7+ Bxf7 23.Qxf5 Re7 24.gxf7 e3 25.Kd1 Nxf4 26.Qxf4 Bxe5 27.Qh6+ Bg7 28.Qg6 Rxf7 29.Qd6+ Re7 30.Ke2 Kf7 31.b3 Re6 32.Qc7+ Re7 33.Qc4+ Re6 34.Qg4 Kf6 35.c4
+- (3.56) Depth: 38/77 00:09:42 13141MN
Black's fully lost already
And some better than 7.f5 (?!) in this output- line is 7.Nxe4 (!), e.g.ernst wrote: 54/101 577:31 +1.55 1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.O-O-O Ne4 4.Rhf1 g6 5.Qh4 Re8 6.Rf3 Bf8 7.f5 exf5 8.Nxd5 Qxe5 9.Nxf5 Bxf5 10.Bd4 Nc6 11.Bxe5 Nxe5 12.Rf4 Be7 13.Nf6+ Nxf6 14.gxf6 (338.109.924.927) 9757 TB:881.455
best move: Bd3xh7 time: 620:13.360 min n/s: 9.757.432 nodes: 364.607.691.267 TB: 881.455
1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.0–0–0 Ne4 4.Rhf1 g6 5.Qh4 Re8 6.Rf3 Bf8 7.Nxe4 dxe4 8.Rh3 Bg7 9.Qh7+ Kf8 10.Bf2
At the end of that line I get this output:
[D]rnb1rk2/1pq2pbQ/p3p1p1/4P1P1/3NpP2/7R/PPP2B1P/2KR4 b - - 0 1
Analysis by pedantFishW_2016-10-17_popcnt:
10...b6 11.Rc3 Qe7 12.h4 Ra7 13.Nf5 exf5 14.Bxb6 Be6 15.Bc5 Qxc5 16.Rxc5 Rae7 17.h5 gxh5 18.Qxh5 Rd7 19.Rxd7 Nxd7 20.Rc7 Nb6 21.g6 Nd5 22.Rxf7+ Bxf7 23.Qxf5 Re7 24.gxf7 e3 25.Kd1 Nxf4 26.Qxf4 Bxe5 27.Qh6+ Bg7 28.Qg6 Rxf7 29.Qd6+ Re7 30.Ke2 Kf7 31.b3 Re6 32.Qc7+ Re7 33.Qc4+ Re6 34.Qg4 Kf6 35.c4
+- (3.56) Depth: 38/77 00:09:42 13141MN
Black's fully lost already
Peter.
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tpoppins
- Posts: 919
- Joined: Tue Nov 24, 2015 9:11 pm
- Location: upstate
Re: Testposition King Safety
The immediate 4.Nxe4 wins as well, as per analysis I posted on the previous page.peter wrote:Hi!And some better than 7.f5 (?!) in this output- line is 7.Nxe4 (!), e.g.ernst wrote: 54/101 577:31 +1.55 1.Bxh7+ Kxh7 2.Qh5+ Kg8 3.O-O-O Ne4 4.Rhf1 g6 5.Qh4 Re8 6.Rf3 Bf8 7.f5 exf5 8.Nxd5 Qxe5 9.Nxf5 Bxf5 10.Bd4 Nc6 11.Bxe5 Nxe5 12.Rf4 Be7 13.Nf6+ Nxf6 14.gxf6 (338.109.924.927) 9757 TB:881.455
best move: Bd3xh7 time: 620:13.360 min n/s: 9.757.432 nodes: 364.607.691.267 TB: 881.455
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Eelco de Groot
- Posts: 4567
- Joined: Sun Mar 12, 2006 2:40 am
- Full name:
Re: Testposition King Safety
Stockfish wants to play that, (Nxe4) but RS did not like it, I'm not sure. It likes immediately Rhg1 much better. Sven's line seemed to be a draw.
The line from Kim is interesting, I must say that it did seem at least very un-Stockfish like, but trying to backward solve it, the 4. Qg4 b5 turned out well for both sides, so White is winning with Qg4 but not because of b5. Backward solving with RS has the same strange effects as Stockfish. It forgot the best line it had found often, and then displayed the line from Kim again, (Is that just because at the beginning you execute that line, befote going backwards again? So it has some shallow hash entries left? I don't know.) Not that that was a bad one but it had just found something better. I have no idea what causes it, in a particular case it can of course always be Zugzwang, but not sure that is the case here and even with Zugzwang it still should find the better moves it found in the hash table.
This has just been running a few days, after 4. Qg4 from Kim's line
[pgn]
[Event "?"]
[Site "?"]
[Date "2016.10.20"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "rnb2rk1/1pq1bppp/p3p3/2npP1P1/3N1P2/2NBB3/PPP4P/R2QK2R w KQ -"]
1. Bxh7+ Kxh7 2. Qh5+ Kg8 3. O-O-O g6 4. Qg4 {diagram} b5 5. h4 b4
6. Nce2 Kg7 7. h5 Rg8 8. hxg6 fxg6 9. Rh6 Kf8 10. Qh3 Ke8
11. f5 gxf5 12. Nxf5 exf5 13. Qh5+ Kd8 *[/pgn]
[D]rnb2rk1/1pq1bp2/p3p1p1/2npP1P1/3N1PQ1/2N1B3/PPP4P/2KR3R b - -
Engine: Rainbow Serpent 20160903_014 HT (512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott
.
.
.
40/79 1244:09+3.01 4...b5 5.h4 b4 6.Nce2 Nc6 7.h5 Nxd4
8.Nxd4 Bd7 9.hxg6 fxg6 10.Qh3 Kf7
11.Qh7+ Ke8 12.Qxg6+ Kd8 13.Kb1 Kc8
14.Rh7 Re8 15.Qf7 Kb7 16.g6 Rac8
17.g7 Bb5 (350.192.004.576) 4691
41/79 1278:32+2.93++ 4...b5 (359.932.753.301) 4691
41/79 1313:35+3.01-- 4...b5 5.h4 (369.847.869.830) 4692
41/79 1374:47+3.13-- 4...b5 5.h4 (396.394.910.928) 4805
41/79 1440:20+3.03++ 4...Kg7 (432.338.592.574) 5002
41/79 1489:53+3.16-- 4...Kg7 5.h4 (459.885.637.332) 5144
41/79 1510:13+2.98++ 4...Kg7 (471.307.465.081) 5201
41/79 1524:56+2.95 4...Kg7 5.h4 Nc6 6.h5 Rg8 7.hxg6 fxg6
8.Qh3 Qd8 9.f5 exf5 10.Nxd5 Nxd4
11.Rxd4 Be6 12.Nf6 Rh8 13.Rh4 Rxh4
14.Qxh4 Nd3+ 15.cxd3 Rc8+ 16.Kb1 Qxd3+
17.Ka1 Qc4 (479.552.118.751) 5241
42/79 1579:15+3.04-- 4...Kg7 5.h4 (510.059.948.489) 5382
42/79 1666:38+2.95++ 4...Nc6 (559.755.726.263) 5597
42/88 1734:45+2.83++ 4...Nc6 (599.344.673.373) 5758
42/88 1754:40+2.93-- 4...Nc6 5.h4 (611.564.138.320) 5808
42/88 1783:08+2.96 4...Nc6 5.h4 Kg7 6.h5 Rg8 7.hxg6 fxg6
8.Qh3 Kf8 9.f5 Nxd4 10.fxg6 Qxe5
11.Bxd4 Qxg5+ 12.Be3 Qxg6 13.Rdg1 e5
14.Qf1+ Qf6 15.Nxd5 Qxf1+ 16.Rxf1+ Ke8
17.Nc7+ Kd7 (627.967.907.686) 5869
43/88 1893:43+3.04-- 4...Nc6 5.h4 (691.417.391.210) 6085
43/88 2014:15+3.09 4...Nc6 5.h4 Kg7 6.h5 Rg8 7.hxg6 fxg6
8.Qh3 Kf8 9.f5 Nxd4 10.fxg6 Qxe5
11.Bxd4 Qxg5+ 12.Be3 Qxg6 13.Rdg1 e5
14.Qf1+ Qf6 15.Nxd5 Qxf1+ 16.Rxf1+ Ke8
17.Nc7+ Kd7 (760.185.557.447) 6290
44/88 2328:41+3.17-- 4...Nc6 5.h4 (937.759.118.354) 6711
44/88 2570:12+3.25-- 4...Nc6 5.h4 (1071.761.129.802) 6949
44/88 2867:17+3.17++ 4...Kg7 (1240.681.112.594) 7211
44/88 2911:00+3.27-- 4...Kg7 5.h4 (1264.868.949.635) 7241
44/88 2976:16+3.14++ 4...Kg7 (1301.585.187.740) 7288
44/88 3091:18+3.32-- 4...Kg7 5.h4 (1366.774.324.313) 7368
44/88 4845:13+3.67 4...Kg7 5.h4 Rg8 6.h5 Nc6 7.hxg6 fxg6
8.Qh3 Nxd4 9.Bxd4 Qd8 10.Qh7+ Kf8
11.Rd2 Qe8 12.Qxg8+ Kxg8 13.Rdh2 Qf8
14.Rh8+ Kf7 15.R1h7+ Qg7 16.Nxd5 Nd7
17.Rxg7+ Kxg7 (2346.633.665.136) 8071
45/88 4938:22+3.59++ 4...Kg7 (2398.625.111.052) 8095
45/88 5157:30+3.51++ 4...Kg7 (2519.761.488.700) 8142
45/88 5196:39+3.39++ 4...Kg7 (2541.698.939.382) 8151
45/88 5208:58+3.22++ 4...Kg7 (2548.484.170.030) 8154
45/88 5248:53+3.35-- 4...Kg7 5.h4 (2570.879.629.185) 8163
45/88 5267:59+3.17++ 4...Kg7 (2581.536.126.547) 8167
45/88 5379:03+3.41-- 4...Kg7 5.h4 (2643.893.209.009) 8191
{45/89 5677:58+3.29 4...Nc6 (2810.469.043.127) 8249}
best move: Nb8-c6 time: 5677:58.969 min n/s: 8.249.611 nodes: 2810.469.043.127
(The last complete iteration is the depth 44 one, the 45 (with just one move)is displayed because I stopped analysis there This is a bit buggy, I don't think it should do that. Not sure what Stockfish does at the moment)
White seems to be winning in all lines so not sure 4... Nc6 is really better than 4... Kc7, or 4... b5 as in the original.
The line from Kim is interesting, I must say that it did seem at least very un-Stockfish like, but trying to backward solve it, the 4. Qg4 b5 turned out well for both sides, so White is winning with Qg4 but not because of b5. Backward solving with RS has the same strange effects as Stockfish. It forgot the best line it had found often, and then displayed the line from Kim again, (Is that just because at the beginning you execute that line, befote going backwards again? So it has some shallow hash entries left? I don't know.) Not that that was a bad one but it had just found something better. I have no idea what causes it, in a particular case it can of course always be Zugzwang, but not sure that is the case here and even with Zugzwang it still should find the better moves it found in the hash table.
This has just been running a few days, after 4. Qg4 from Kim's line
[pgn]
[Event "?"]
[Site "?"]
[Date "2016.10.20"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "rnb2rk1/1pq1bppp/p3p3/2npP1P1/3N1P2/2NBB3/PPP4P/R2QK2R w KQ -"]
1. Bxh7+ Kxh7 2. Qh5+ Kg8 3. O-O-O g6 4. Qg4 {diagram} b5 5. h4 b4
6. Nce2 Kg7 7. h5 Rg8 8. hxg6 fxg6 9. Rh6 Kf8 10. Qh3 Ke8
11. f5 gxf5 12. Nxf5 exf5 13. Qh5+ Kd8 *[/pgn]
[D]rnb2rk1/1pq1bp2/p3p1p1/2npP1P1/3N1PQ1/2N1B3/PPP4P/2KR3R b - -
Engine: Rainbow Serpent 20160903_014 HT (512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott
.
.
.
40/79 1244:09+3.01 4...b5 5.h4 b4 6.Nce2 Nc6 7.h5 Nxd4
8.Nxd4 Bd7 9.hxg6 fxg6 10.Qh3 Kf7
11.Qh7+ Ke8 12.Qxg6+ Kd8 13.Kb1 Kc8
14.Rh7 Re8 15.Qf7 Kb7 16.g6 Rac8
17.g7 Bb5 (350.192.004.576) 4691
41/79 1278:32+2.93++ 4...b5 (359.932.753.301) 4691
41/79 1313:35+3.01-- 4...b5 5.h4 (369.847.869.830) 4692
41/79 1374:47+3.13-- 4...b5 5.h4 (396.394.910.928) 4805
41/79 1440:20+3.03++ 4...Kg7 (432.338.592.574) 5002
41/79 1489:53+3.16-- 4...Kg7 5.h4 (459.885.637.332) 5144
41/79 1510:13+2.98++ 4...Kg7 (471.307.465.081) 5201
41/79 1524:56+2.95 4...Kg7 5.h4 Nc6 6.h5 Rg8 7.hxg6 fxg6
8.Qh3 Qd8 9.f5 exf5 10.Nxd5 Nxd4
11.Rxd4 Be6 12.Nf6 Rh8 13.Rh4 Rxh4
14.Qxh4 Nd3+ 15.cxd3 Rc8+ 16.Kb1 Qxd3+
17.Ka1 Qc4 (479.552.118.751) 5241
42/79 1579:15+3.04-- 4...Kg7 5.h4 (510.059.948.489) 5382
42/79 1666:38+2.95++ 4...Nc6 (559.755.726.263) 5597
42/88 1734:45+2.83++ 4...Nc6 (599.344.673.373) 5758
42/88 1754:40+2.93-- 4...Nc6 5.h4 (611.564.138.320) 5808
42/88 1783:08+2.96 4...Nc6 5.h4 Kg7 6.h5 Rg8 7.hxg6 fxg6
8.Qh3 Kf8 9.f5 Nxd4 10.fxg6 Qxe5
11.Bxd4 Qxg5+ 12.Be3 Qxg6 13.Rdg1 e5
14.Qf1+ Qf6 15.Nxd5 Qxf1+ 16.Rxf1+ Ke8
17.Nc7+ Kd7 (627.967.907.686) 5869
43/88 1893:43+3.04-- 4...Nc6 5.h4 (691.417.391.210) 6085
43/88 2014:15+3.09 4...Nc6 5.h4 Kg7 6.h5 Rg8 7.hxg6 fxg6
8.Qh3 Kf8 9.f5 Nxd4 10.fxg6 Qxe5
11.Bxd4 Qxg5+ 12.Be3 Qxg6 13.Rdg1 e5
14.Qf1+ Qf6 15.Nxd5 Qxf1+ 16.Rxf1+ Ke8
17.Nc7+ Kd7 (760.185.557.447) 6290
44/88 2328:41+3.17-- 4...Nc6 5.h4 (937.759.118.354) 6711
44/88 2570:12+3.25-- 4...Nc6 5.h4 (1071.761.129.802) 6949
44/88 2867:17+3.17++ 4...Kg7 (1240.681.112.594) 7211
44/88 2911:00+3.27-- 4...Kg7 5.h4 (1264.868.949.635) 7241
44/88 2976:16+3.14++ 4...Kg7 (1301.585.187.740) 7288
44/88 3091:18+3.32-- 4...Kg7 5.h4 (1366.774.324.313) 7368
44/88 4845:13+3.67 4...Kg7 5.h4 Rg8 6.h5 Nc6 7.hxg6 fxg6
8.Qh3 Nxd4 9.Bxd4 Qd8 10.Qh7+ Kf8
11.Rd2 Qe8 12.Qxg8+ Kxg8 13.Rdh2 Qf8
14.Rh8+ Kf7 15.R1h7+ Qg7 16.Nxd5 Nd7
17.Rxg7+ Kxg7 (2346.633.665.136) 8071
45/88 4938:22+3.59++ 4...Kg7 (2398.625.111.052) 8095
45/88 5157:30+3.51++ 4...Kg7 (2519.761.488.700) 8142
45/88 5196:39+3.39++ 4...Kg7 (2541.698.939.382) 8151
45/88 5208:58+3.22++ 4...Kg7 (2548.484.170.030) 8154
45/88 5248:53+3.35-- 4...Kg7 5.h4 (2570.879.629.185) 8163
45/88 5267:59+3.17++ 4...Kg7 (2581.536.126.547) 8167
45/88 5379:03+3.41-- 4...Kg7 5.h4 (2643.893.209.009) 8191
{45/89 5677:58+3.29 4...Nc6 (2810.469.043.127) 8249}
best move: Nb8-c6 time: 5677:58.969 min n/s: 8.249.611 nodes: 2810.469.043.127
(The last complete iteration is the depth 44 one, the 45 (with just one move)is displayed because I stopped analysis there This is a bit buggy, I don't think it should do that. Not sure what Stockfish does at the moment)
White seems to be winning in all lines so not sure 4... Nc6 is really better than 4... Kc7, or 4... b5 as in the original.
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan