Code: Select all
info depth 40 seldepth 21 score cp 8 lowerbound nodes 31267890 nps 2302156 tbhits 170525 time 13582 multipv 1 pv e2d3 h3g4 d3e4 e7d8 e4e5 d8c7 e5e6 c7d8 g5g6 g4f4 e6f7 f4e5 f7g7 e5e4 g7f7
Difficult ending for Stockfish
Moderators: hgm, Rebel, chrisw
-
mohzus
- Posts: 106
- Joined: Tue Sep 24, 2013 2:54 am
Re: Difficult ending for Stockfish
I see, I thought it was a draw sorry. I had to wait until depth 40 (about 13 seconds) for SF + syzygy (5 pieces) to unglue from its 0 cp evaluation:
; from there it went quickly up to a +104 evaluation.
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Mike S.
- Posts: 1480
- Joined: Thu Mar 09, 2006 5:33 am
Re: Difficult ending for Stockfish
i5/3210M, 512 MB hash
Engine: Stockfish 101213 (512 MB)
von Tord Romstad, Marco Costalba and Joona
1/01 0:00 +2.42 1.Ke3 (42) 42
(...)
25/35 0:00 0.00 1.Kf3 Kh4 2.Ke3 Kg3 3.Ke4 Kg4 4.Ke5 g6 5.Ke6 Ld8 6.f5 Kxg5 7.fxg6 Kxg6 8.Kd6 Lb6 9.Ke6 Ld8 (1.693.781) 2444
26/39 0:02 +8.44 1.Kd3
Kg3 2.Ke3 Ld8 3.Ke4 Kf2 4.Ke5 Ke3 5.g6 Lb6 6.Ke6 Kd4 7.f5 Ld8 8.Kf7 Lf6 9.Ke8 Kc5 10.d6 Kc6 11.d8D Lxd8 12.Kxd8 Kb7 13.f6 gxf6 14.g7 (7.326.897) 3536
(...)
38/60 0:43 +86.42 1.Kd3 Kg3 2.Ke3 Kh4 3.Kd4 Kg4 4.Ke4 Ld8 5.Ke5 g6 6.d6 La5 7.f5 Kxg5 8.f6 Lc3+ 9.Kd5 Lxf6 10.Ke6 Ld8 11.Kf7 Lf6 12.Ke8 Kf4 13.d8D Lxd8 14.Kxd8 (285.611.875) 6506
Bester Zug: Ke2-d3 Zeit: 0:44.172 min K/s: 6.506.706 Knoten: 285.611.875
No tablebases, no learning. The only change I did was min. split depth = 10. But unfortunately, it was not reproducable on 4 threads. 2nd try failed.
Next: Singlethread.
1st try: Fail. 2nd try: Fail. And so on... I guess this position is of a nature that SMP has better probability to solve quickly, due to different search margins or whatever that's called. Syzygy-Fish (with 5-men) failed in the singlethread attempt, too. But then on 4 threads:
Found 145 tablebases.
Engine: Syz-Fish 131213 (512 MB)
von Tord Romstad, Marco Costalba and Joona
1/01 0:00 +2.42 1.Ke3 (42) 42
(...)
14/15 0:00 +0.30 1.Kf3 Kh4 2.Ke4 g6 3.Ke5 Kg4 4.d6 Ld8 5.Ke4 Kh5 6.Kd5 Kg4 7.Ke4 (72.630) 741 TB:144
15/18 0:00 +0.34 1.Kd3 Kg3 2.Ke3 Kh4 3.Kd4 Ld8 4.Ke5 Kg4 5.g6 Lf6+ 6.Kd6 Ld8 7.Ke6 Kxf4 8.Kf7 Ke5 9.Kxg7 Lc7 10.d6 (167.265) 1051 TB:493
(...)
30/41 0:10 +20.69 1.Kd3 Kh4 2.Kd4 g6 3.d6 Ld8 4.Kd5 Kg4 5.Ke5 Kh4 6.Ke6 Kg4 7.Kf7 Kf5 8.Ke8 Lb6 9.d8D Lxd8 10.Kxd8 Ke4 11.Ke8 Kd5 12.d7 Kc4 13.d8D (51.406.030) 5075 TB:275.561
Bester Zug: Ke2-d3 Zeit: 0:10.406 min K/s: 5.075.133 Knoten: 51.406.030 TB: 275.561
Engine: Stockfish 101213 (512 MB)
von Tord Romstad, Marco Costalba and Joona
1/01 0:00 +2.42 1.Ke3 (42) 42
(...)
25/35 0:00 0.00 1.Kf3 Kh4 2.Ke3 Kg3 3.Ke4 Kg4 4.Ke5 g6 5.Ke6 Ld8 6.f5 Kxg5 7.fxg6 Kxg6 8.Kd6 Lb6 9.Ke6 Ld8 (1.693.781) 2444
26/39 0:02 +8.44 1.Kd3
Kg3 2.Ke3 Ld8 3.Ke4 Kf2 4.Ke5 Ke3 5.g6 Lb6 6.Ke6 Kd4 7.f5 Ld8 8.Kf7 Lf6 9.Ke8 Kc5 10.d6 Kc6 11.d8D Lxd8 12.Kxd8 Kb7 13.f6 gxf6 14.g7 (7.326.897) 3536(...)
38/60 0:43 +86.42 1.Kd3 Kg3 2.Ke3 Kh4 3.Kd4 Kg4 4.Ke4 Ld8 5.Ke5 g6 6.d6 La5 7.f5 Kxg5 8.f6 Lc3+ 9.Kd5 Lxf6 10.Ke6 Ld8 11.Kf7 Lf6 12.Ke8 Kf4 13.d8D Lxd8 14.Kxd8 (285.611.875) 6506
Bester Zug: Ke2-d3 Zeit: 0:44.172 min K/s: 6.506.706 Knoten: 285.611.875
No tablebases, no learning. The only change I did was min. split depth = 10. But unfortunately, it was not reproducable on 4 threads. 2nd try failed.
Next: Singlethread.
1st try: Fail. 2nd try: Fail. And so on... I guess this position is of a nature that SMP has better probability to solve quickly, due to different search margins or whatever that's called. Syzygy-Fish (with 5-men) failed in the singlethread attempt, too. But then on 4 threads:
Found 145 tablebases.
Engine: Syz-Fish 131213 (512 MB)
von Tord Romstad, Marco Costalba and Joona
1/01 0:00 +2.42 1.Ke3 (42) 42
(...)
14/15 0:00 +0.30 1.Kf3 Kh4 2.Ke4 g6 3.Ke5 Kg4 4.d6 Ld8 5.Ke4 Kh5 6.Kd5 Kg4 7.Ke4 (72.630) 741 TB:144
15/18 0:00 +0.34 1.Kd3 Kg3 2.Ke3 Kh4 3.Kd4 Ld8 4.Ke5 Kg4 5.g6 Lf6+ 6.Kd6 Ld8 7.Ke6 Kxf4 8.Kf7 Ke5 9.Kxg7 Lc7 10.d6 (167.265) 1051 TB:493
(...)
30/41 0:10 +20.69 1.Kd3 Kh4 2.Kd4 g6 3.d6 Ld8 4.Kd5 Kg4 5.Ke5 Kh4 6.Ke6 Kg4 7.Kf7 Kf5 8.Ke8 Lb6 9.d8D Lxd8 10.Kxd8 Ke4 11.Ke8 Kd5 12.d7 Kc4 13.d8D (51.406.030) 5075 TB:275.561
Bester Zug: Ke2-d3 Zeit: 0:10.406 min K/s: 5.075.133 Knoten: 51.406.030 TB: 275.561
Regards, Mike
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Eelco de Groot
- Posts: 4567
- Joined: Sun Mar 12, 2006 2:40 am
- Full name:
Re: Difficult ending for Stockfish
Hello Jouni, it is not a big problem position for old Scid Serpent, it solves in three seconds on Quad6700, probably because of the Stand pat search that it can do before nullmove. No Syzygy bases or changes to bishop evaluation necessary. So a better result probably relies on better Zugzwang detection, tablebases but I don't really count that as a minimalist Stockfish, or better rules for the wrong colour bishop.
8/3Pb1p1/8/3P2P1/5P2/7k/4K3/8 w - -
Engine: Scid Serpent 20131219_010 MP (32 bit compile, Q6700 2672 MHz, 512 MB)
by Tord Romstad, Marco Costalba and Joona Kiiski
28/37 0:01 0.00 1.Kf3 Kh4 2.d6 Bd8 3.Ke4 Kh3 4.Kf5 Kg3
5.g6 Bf6 6.Ke6 Kxf4 7.Kf7 Ke5 8.d8R Bxd8
9.Kxg7 Ke6 10.d7 Bf6+ 11.Kf8 Kxd7
12.Kf7 Bc3 13.g7 Bxg7 (3.870.639) 2850
29/41 0:03 +2.67++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Bc7+ 6.Ke6 Kxf4 7.Ke7 Ke5
8.d8Q Bxd8+ 9.Kxd8 Kxd5 10.Ke7 Ke5
11.g6 Kf5 12.Kf7 (10.743.460) 3408
29/41 0:03 +4.04++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Bc7+ 6.Ke6 Kxf4 7.Ke7 Ke5
8.d8Q Bxd8+ 9.Kxd8 Kxd5 10.Ke7 Ke5
11.g6 Kf5 12.Kf7 (11.867.485) 3478
29/44 0:03 +6.09++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Bc7+ 6.Ke6 Kxf4 7.Ke7 Ke5
8.d8Q Bxd8+ 9.Kxd8 Kxd5 10.Ke7 Ke5
11.g6 Kf5 12.Kf7 (13.368.272) 3531
29/44 0:04 +9.16++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Bc7+ 6.Ke6 Kxf4 7.Ke7 Ke5
8.d8Q Bxd8+ 9.Kxd8 Kxd5 10.Ke7 Ke5
11.g6 Kf5 12.Kf7 (15.473.677) 3566
29/48 0:05 +10.32 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxd5 13.Ke7 Kc5 14.f5 (21.574.196) 3721
30/48 0:06 +10.40++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxf4 13.Ke7 Ke3 14.d6 (23.512.993) 3622
30/48 0:06 +10.48++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxf4 13.Ke7 Ke3 14.d6 (25.229.532) 3632
30/48 0:07 +10.61++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxf4 13.Ke7 Ke3 14.d6 (26.982.973) 3647
30/48 0:07 +10.79++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxf4 13.Ke7 Ke3 14.d6 (28.619.336) 3667
30/48 0:08 +11.06++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxf4 13.Ke7 Ke3 14.d6 (30.596.888) 3684
30/48 0:08 +11.47++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxf4 13.Ke7 Ke3 14.d6 (32.856.973) 3711
30/48 0:09 +12.08++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxf4 13.Ke7 Ke3 14.d6 (35.836.567) 3707
30/48 0:10 +12.12 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 g6 6.d6 Ba5 7.f5 Kxg5 8.f6 Bc3+
9.Kd5 Bxf6 10.Ke6 Bd8 11.Kf7 Bf6
12.Ke8 Kh4 13.d8Q Bxd8 14.Kxd8 (39.244.234) 3705
31/48 0:11 +12.12 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 g6 6.d6 Ba5 7.f5 Kxg5 8.f6 Bc3+
9.Kd5 Bxf6 10.Ke6 Bd8 11.Kf7 Bf6
12.Ke8 Kg4 13.d8Q Bxd8 14.Kxd8 (41.992.063) 3700
32/48 0:12 +12.12 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 g6 6.d6 Ba5 7.f5 Kxg5 8.f6 Bc3+
9.Kd5 Bxf6 10.Ke6 Bd8 11.Kf7 Bf6
12.Ke8 Kg4 13.d8Q Bxd8 14.Kxd8 (45.096.827) 3717
33/48 0:13 +12.20++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 g6 6.d6 Ba5 7.f5 Kxg5 8.f6 Bc3+
9.Kd5 Bxf6 10.Ke6 Bd8 11.Kf7 Bf6
12.Ke8 Kg4 13.d8Q Bxd8 14.Kxd8 (50.228.568) 3771
33/49 0:13 +12.20 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 g6 6.d6 Ba5 7.f5 Kxg5 8.f6 Bc3+
9.Kd5 Bxf6 10.Ke6 Bd8 11.Kf7 Bf6
12.Ke8 Kg4 13.d8Q Bxd8 14.Kxd8 (51.770.890) 3794
best move: Ke2-d3 time: 0:14.243 min n/s: 3.794.128 nodes: 51.770.890
8/3Pb1p1/8/3P2P1/5P2/7k/4K3/8 w - -
Engine: Scid Serpent 20131219_010 MP (32 bit compile, Q6700 2672 MHz, 512 MB)
by Tord Romstad, Marco Costalba and Joona Kiiski
28/37 0:01 0.00 1.Kf3 Kh4 2.d6 Bd8 3.Ke4 Kh3 4.Kf5 Kg3
5.g6 Bf6 6.Ke6 Kxf4 7.Kf7 Ke5 8.d8R Bxd8
9.Kxg7 Ke6 10.d7 Bf6+ 11.Kf8 Kxd7
12.Kf7 Bc3 13.g7 Bxg7 (3.870.639) 2850
29/41 0:03 +2.67++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Bc7+ 6.Ke6 Kxf4 7.Ke7 Ke5
8.d8Q Bxd8+ 9.Kxd8 Kxd5 10.Ke7 Ke5
11.g6 Kf5 12.Kf7 (10.743.460) 3408
29/41 0:03 +4.04++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Bc7+ 6.Ke6 Kxf4 7.Ke7 Ke5
8.d8Q Bxd8+ 9.Kxd8 Kxd5 10.Ke7 Ke5
11.g6 Kf5 12.Kf7 (11.867.485) 3478
29/44 0:03 +6.09++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Bc7+ 6.Ke6 Kxf4 7.Ke7 Ke5
8.d8Q Bxd8+ 9.Kxd8 Kxd5 10.Ke7 Ke5
11.g6 Kf5 12.Kf7 (13.368.272) 3531
29/44 0:04 +9.16++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Bc7+ 6.Ke6 Kxf4 7.Ke7 Ke5
8.d8Q Bxd8+ 9.Kxd8 Kxd5 10.Ke7 Ke5
11.g6 Kf5 12.Kf7 (15.473.677) 3566
29/48 0:05 +10.32 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxd5 13.Ke7 Kc5 14.f5 (21.574.196) 3721
30/48 0:06 +10.40++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxf4 13.Ke7 Ke3 14.d6 (23.512.993) 3622
30/48 0:06 +10.48++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxf4 13.Ke7 Ke3 14.d6 (25.229.532) 3632
30/48 0:07 +10.61++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxf4 13.Ke7 Ke3 14.d6 (26.982.973) 3647
30/48 0:07 +10.79++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxf4 13.Ke7 Ke3 14.d6 (28.619.336) 3667
30/48 0:08 +11.06++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxf4 13.Ke7 Ke3 14.d6 (30.596.888) 3684
30/48 0:08 +11.47++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxf4 13.Ke7 Ke3 14.d6 (32.856.973) 3711
30/48 0:09 +12.08++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 Kf3 6.g6 Bf6+ 7.Kd6 Bd8 8.Ke6 Bf6
9.Kf7 Ke4 10.Ke8 Bh4 11.d8Q Bxd8
12.Kxd8 Kxf4 13.Ke7 Ke3 14.d6 (35.836.567) 3707
30/48 0:10 +12.12 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 g6 6.d6 Ba5 7.f5 Kxg5 8.f6 Bc3+
9.Kd5 Bxf6 10.Ke6 Bd8 11.Kf7 Bf6
12.Ke8 Kh4 13.d8Q Bxd8 14.Kxd8 (39.244.234) 3705
31/48 0:11 +12.12 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 g6 6.d6 Ba5 7.f5 Kxg5 8.f6 Bc3+
9.Kd5 Bxf6 10.Ke6 Bd8 11.Kf7 Bf6
12.Ke8 Kg4 13.d8Q Bxd8 14.Kxd8 (41.992.063) 3700
32/48 0:12 +12.12 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 g6 6.d6 Ba5 7.f5 Kxg5 8.f6 Bc3+
9.Kd5 Bxf6 10.Ke6 Bd8 11.Kf7 Bf6
12.Ke8 Kg4 13.d8Q Bxd8 14.Kxd8 (45.096.827) 3717
33/48 0:13 +12.20++ 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 g6 6.d6 Ba5 7.f5 Kxg5 8.f6 Bc3+
9.Kd5 Bxf6 10.Ke6 Bd8 11.Kf7 Bf6
12.Ke8 Kg4 13.d8Q Bxd8 14.Kxd8 (50.228.568) 3771
33/49 0:13 +12.20 1.Kd3 Kg3 2.Ke3 Kh3 3.Kd4 Kg4 4.Ke4 Bd8
5.Ke5 g6 6.d6 Ba5 7.f5 Kxg5 8.f6 Bc3+
9.Kd5 Bxf6 10.Ke6 Bd8 11.Kf7 Bf6
12.Ke8 Kg4 13.d8Q Bxd8 14.Kxd8 (51.770.890) 3794
best move: Ke2-d3 time: 0:14.243 min n/s: 3.794.128 nodes: 51.770.890
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
-
carldaman
- Posts: 2283
- Joined: Sat Jun 02, 2012 2:13 am
Re: Difficult ending for Stockfish
Sting SF v4 (Stockfish derivative which specializes in zugzwang detection):
Code: Select all
8/3Pb1p1/8/3P2P1/5P2/7k/4K3/8 w - - 0 1
Analysis by Sting SF 4 pop64 1-core:
1.Kd3
= (0.24 ++) Depth: 21 00:00:00 1685kN
1.Kd3
+/= (0.42 ++) Depth: 21 00:00:00 1771kN
1.Kd3
+/= (0.69 ++) Depth: 21 00:00:00 1893kN
1.Kd3
+/- (1.10 ++) Depth: 21 00:00:00 1993kN
1.Kd3
+- (1.71 ++) Depth: 21 00:00:00 2103kN
1.Kd3
+- (2.63 ++) Depth: 21 00:00:01 2297kN
1.Kd3 Kh4 2.Kd4 Kg4 3.Ke4 Bd8 4.Ke5 Kf3 5.g6 Bf6+ 6.Kd6 Ke4 7.Kc7 Kxd5 8.d8R+ Ke4 9.Rd6 Bc3 10.Rc6 Ba5+ 11.Kd7 Kxf4 12.Ke6
+- (2.78) Depth: 21/35 00:00:01 2502kN
1.Kd3
+- (2.90 ++) Depth: 22 00:00:01 2800kN
1.Kd3
+- (3.03 ++) Depth: 22 00:00:01 3015kN
1.Kd3
+- (3.21 ++) Depth: 22 00:00:01 3221kN
1.Kd3
+- (3.48 ++) Depth: 22 00:00:01 3444kN
1.Kd3
+- (3.89 ++) Depth: 22 00:00:01 3680kN
1.Kd3
+- (4.50 ++) Depth: 22 00:00:01 3988kN
1.Kd3
+- (5.41 ++) Depth: 22 00:00:01 4316kN
1.Kd3
+- (6.78 ++) Depth: 22 00:00:01 4803kN
1.Kd3
+- (8.83 ++) Depth: 22 00:00:02 5526kN
1.Kd3 Kh4 2.Kd4 Kg4 3.Ke4 Bd8 4.Ke5 Ba5 5.g6 Kh5 6.Ke6 Kxg6 7.Ke7 Kf5 8.d8Q Bxd8+ 9.Kxd8 Kxf4 10.d6 g5 11.d7 g4 12.Kc7 g3 13.d8Q g2 14.Qd4+ Kf3 15.Kd6 Ke2 16.Qg1 Kf3 17.Ke5 Kg3 18.Kd5 Kf3 19.Kc6 Kg3 20.Kd6 Kf3
+- (9.57) Depth: 22/39 00:00:02 6547kN
1.Kd3
+- (9.69 ++) Depth: 23 00:00:02 7222kN
1.Kd3
+- (9.81 ++) Depth: 23 00:00:03 7886kN
1.Kd3
+- (10.00 ++) Depth: 23 00:00:03 8567kN
1.Kd3
+- (10.27 ++) Depth: 23 00:00:03 9311kN
1.Kd3
+- (9.45 --) Depth: 23 00:00:03 9646kN
1.Kd3 Kh4 2.Kd4 Kg4 3.Ke4 Bd8 4.Ke5 g6 5.d6 Ba5 6.f5 Kxg5 7.f6 Bc3+ 8.Kd5 Bxf6 9.Ke6 Bd8 10.Kf7 Bf6 11.Ke8 Kf5 12.d8Q Bxd8 13.Kxd8 g5 14.d7 g4 15.Ke7 g3 16.d8Q Kf4 17.Qd5 Ke3 18.Kd6 Kf2 19.Qd2+ Kf3
+- (9.01) Depth: 23/39 00:00:03 9813kN
1.Kd3
+- (9.13 ++) Depth: 24 00:00:03 10375kN
1.Kd3
+- (9.25 ++) Depth: 24 00:00:04 10816kN
1.Kd3
+- (9.43 ++) Depth: 24 00:00:04 11234kN
1.Kd3
+- (9.70 ++) Depth: 24 00:00:04 11717kN
1.Kd3
+- (10.11 ++) Depth: 24 00:00:04 12242kN
1.Kd3 Kh4 2.Kd4 Kg4 3.Ke4 Bd8 4.Ke5 g6 5.d6 Ba5 6.f5 Kxg5 7.f6 Bc3+ 8.Kd5 Bxf6 9.Ke6 Bd8 10.Kf7 Bf6 11.Ke8 Kg4 12.d8Q Bxd8 13.Kxd8 g5 14.Kc7 Kh3 15.d7 g4 16.d8Q g3 17.Qh8+ Kg2 18.Qh4 Kf3 19.Qd4 Kg2 20.Kc6 Kf3 21.Kd5 g2 22.Kd6 Ke2 23.Qg1 Kf3 24.Ke5 Kg3 25.Ke4 Kh3 26.Ke3
+- (10.46) Depth: 24/42 00:00:04 13215kN
1.Kd3
+- (10.58 ++) Depth: 25 00:00:05 14401kN
1.Kd3 Kh4 2.Kd4 Kg4 3.Ke4 Bd8 4.Ke5 g6 5.d6 Ba5 6.f5 Kxg5 7.f6 Bc3+ 8.Kd5 Bxf6 9.Ke6 Bd8 10.Kf7 Bf6 11.Ke8 Kg4 12.d8Q Bxd8 13.Kxd8 g5 14.Kc7 Kh3 15.d7 g4 16.d8Q g3 17.Qh8+ Kg4 18.Qh1 Kf4 19.Qh4+ Kf3 20.Qd4 Kg2 21.Kc6 Kf3 22.Kd5 g2 23.Kd6 Ke2 24.Qg1 Kf3 25.Ke5 Kg3 26.Ke4 Kh3 27.Kf4
+- (10.58) Depth: 25/42 00:00:05 14540kN
1.Kd3
+- (10.70 ++) Depth: 26 00:00:05 16016kN
1.Kd3
+- (10.82 ++) Depth: 26 00:00:06 17542kN
1.Kd3
+- (11.01 ++) Depth: 26 00:00:07 19209kN
1.Kd3 Kh4 2.Kd4 Kg4 3.Ke4 Bd8 4.Ke5 g6 5.d6 Ba5 6.f5 Kxg5 7.f6 Bc3+ 8.Kd5 Bxf6 9.Ke6 Bd8 10.Kf7 Bf6 11.Ke8 Kg4 12.d8Q Bxd8 13.Kxd8 g5 14.d7 Kh3 15.Kc7 g4 16.d8Q g3 17.Qh8+ Kg2 18.Kd6 Kf2 19.Qd4+ Kf1 20.Qf4+ Kg2 21.Kd5 Kh3 22.Qd4 Kh2 23.Qh4+ Kg2 24.Ke4
+- (11.27) Depth: 26/49 00:00:07 21133kN
1.Kd3 Kh4 2.Kd4 Kg4 3.Ke4 Bd8 4.Ke5 g6 5.d6 Ba5 6.f5 Kxg5 7.f6 Bc3+ 8.Kd5 Bxf6 9.Ke6 Bd8 10.Kf7 Bf6 11.Ke8 Kg4 12.d8Q Bxd8 13.Kxd8 g5 14.d7 Kh3 15.Kc7 g4 16.d8Q g3 17.Qh8+ Kg2 18.Kd6 Kf2 19.Qd4+ Kf1 20.Qf4+ Kg2 21.Kd5 Kh3 22.Qd4 Kg2 23.Qg4 Kf2 24.Qf4+ Kg2 25.Ke4 Kh3 26.Qc7 Kg4
+- (11.27) Depth: 27/49 00:00:08 22078kN
1.Kd3
+- (11.39 ++) Depth: 28 00:00:09 24857kN
1.Kd3 Kh4 2.Kd4 Kg4 3.Ke4 Bd8 4.Ke5 g6 5.d6 Ba5 6.f5 Kxg5 7.f6 Bc3+ 8.Kd5 Bxf6 9.Ke6 Bd8 10.Kf7 Bf6 11.Ke8 Kg4 12.d8Q Bxd8 13.Kxd8 g5 14.d7 Kh3 15.Kc7 g4 16.d8Q g3 17.Qh8+ Kg2 18.Kd6 Kf2 19.Qd4+ Kf1 20.Qf4+ Kg2 21.Kd5 Kh3 22.Qd4 Kg2 23.Qh4 Kf3 24.Kd6 Kf2 25.Qd4+
+- (11.27) Depth: 28/52 00:00:09 25279kN
1.Kd3
+- (11.35 ++) Depth: 29 00:00:10 27043kN
1.Kd3
+- (11.43 ++) Depth: 29 00:00:11 29914kN
1.Kd3
+- (11.55 ++) Depth: 29 00:00:12 32918kN
1.Kd3
+- (11.73 ++) Depth: 29 00:00:13 36265kN
1.Kd3
+- (12.01 ++) Depth: 29 00:00:15 39824kN
1.Kd3
+- (12.41 ++) Depth: 29 00:00:16 44166kN
1.Kd3
+- (13.03 ++) Depth: 29 00:00:18 49650kN
1.Kd3
+- (13.94 ++) Depth: 29 00:00:21 56234kN
1.Kd3
+- (15.31 ++) Depth: 29 00:00:25 65777kN
1.Kd3
+- (17.36 ++) Depth: 29 00:00:30 77739kN
1.Kd3
+- (20.43 ++) Depth: 29 00:00:36 92724kN
1.Kd3
+- (25.05 ++) Depth: 29 00:00:52 129mN
1.Kd3
+- (31.96 ++) Depth: 29 00:01:15 182mN
1.Kd3 Kh4 2.Kd4 Bd8 3.g6 Kh5 4.f5 Kg4 5.Ke5 Kf3 6.Ke6 Bf6 7.Kf7 Ke4 8.Ke8 Kd3 9.d8Q Be5 10.f6 Bc3 11.fxg7 Bxg7 12.Kf7 Bh6 13.g7 Be3 14.g8Q Kd2 15.Ke6 Kc2 16.d6 Bd4 17.Kf5 Kb2 18.d7 Ka1 19.Qa5+ Kb1 20.d8Q
+- (37.01) Depth: 29/52 00:01:30 216mN
1.Kd3
+- (36.79 --) Depth: 30 00:01:33 223mN
1.Kd3
+- (37.13 ++) Depth: 30 00:01:36 230mN
1.Kd3
+- (35.05 --) Depth: 30 00:01:39 237mN
1.Kd3
+- (37.31 ++) Depth: 30 00:01:41 243mN
1.Kd3
+- (37.72 ++) Depth: 30 00:01:45 253mN
1.Kd3
+- (38.33 ++) Depth: 30 00:01:49 263mN
1.Kd3
+- (39.24 ++) Depth: 30 00:01:52 270mN
1.Kd3 Bd8 2.Kd4 Kh4 3.g6 Kh5 4.f5 Bc7 5.Kc5 Kg5 6.Kc6 Bd8 7.Kb7 Ba5 8.Kc8 Bd2 9.d8Q+ Kh5 10.Qh8+ Kg4 11.f6 Kg3 12.fxg7 Kg4 13.Qd8 Kf3 14.g8Q Ke2 15.Qf7 Be3 16.g7 Bd4 17.g8Q Kd3 18.Qg3+ Kc4 19.d6+ Kb4 20.Qdh4
+- (39.87) Depth: 30/52 00:01:55 278mN
1.Kd3
+- (36.69 --) Depth: 31 00:01:58 285mN
1.Kd3
+- (40.00 ++) Depth: 31 00:01:58 286mN
(CL, 06.01.2014)
-
Jouni
- Posts: 3293
- Joined: Wed Mar 08, 2006 8:15 pm
Re: Difficult ending for Stockfish
Latest SF is much faster. Only change is Tweak King PST tables 
.
Analysis by Stockfish 070114 64 1-cpu:
.
.
.
1.Kd3 Kg4 2.Ke4 Kh4 3.d6 Bd8 4.Kf5 Kg3 5.Ke5 Kg4 6.Ke4 Kg3 7.Ke5
= (0.08 ++) Depth: 30/34 00:00:03 5408kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6
= (0.16 ++) Depth: 30/34 00:00:03 6556kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.Kf7 Kxf4 6.g6 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6
+/= (0.28 ++) Depth: 30/34 00:00:03 7028kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6 Kh6 11.d7
+/= (0.46 ++) Depth: 30/34 00:00:04 7847kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6 Kh6 11.d7
+/- (0.73 ++) Depth: 30/34 00:00:04 8554kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.Ke8 Kh5 11.d6
+/- (1.14 ++) Depth: 30/36 00:00:04 9380kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6 Kh6 11.d7
+- (1.75 ++) Depth: 30/36 00:00:05 10288kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.Ke7 Kf5 11.d6 Ke5 12.d7
+- (2.67 ++) Depth: 30/36 00:00:05 11237kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6 Kf6 11.d7
+- (4.04 ++) Depth: 30/37 00:00:06 12413kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6 Kf6 11.d7
+- (6.09 ++) Depth: 30/40 00:00:07 13743kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6 Kf6 11.d7
+- (9.16 ++) Depth: 30/40 00:00:08 15951kN
1.Kd3 Kg4 2.Ke4 Bd8 3.Ke5 g6 4.d6 Ba5 5.f5 Kxg5 6.f6 Bc3+ 7.Kd5 Bxf6 8.Ke6 Bd8 9.Kf7 Bb6 10.Ke8 Kf4 11.d8Q Bxd8 12.Kxd8 g5 13.Kc7 g4 14.d7 g3 15.d8Q g2 16.Qg8 Kf3 17.Kd6 Kf2 18.Qf7+ Ke2 19.Qe6+ Kf2 20.Qf6+ Ke2 21.Qe5+ Kf2 22.Qf5+ Ke2 23.Qe4+ Kf1 24.Qb1+ Kf2 25.Qb6+ Ke2 26.Ke5 Kf1 27.Qb5+ Ke1 28.Qb1+ Kf2
+- (11.91) Depth: 30/44 00:00:10 20325kN
.Analysis by Stockfish 070114 64 1-cpu:
.
.
.
1.Kd3 Kg4 2.Ke4 Kh4 3.d6 Bd8 4.Kf5 Kg3 5.Ke5 Kg4 6.Ke4 Kg3 7.Ke5
= (0.08 ++) Depth: 30/34 00:00:03 5408kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6
= (0.16 ++) Depth: 30/34 00:00:03 6556kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.Kf7 Kxf4 6.g6 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6
+/= (0.28 ++) Depth: 30/34 00:00:03 7028kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6 Kh6 11.d7
+/= (0.46 ++) Depth: 30/34 00:00:04 7847kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6 Kh6 11.d7
+/- (0.73 ++) Depth: 30/34 00:00:04 8554kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.Ke8 Kh5 11.d6
+/- (1.14 ++) Depth: 30/36 00:00:04 9380kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6 Kh6 11.d7
+- (1.75 ++) Depth: 30/36 00:00:05 10288kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.Ke7 Kf5 11.d6 Ke5 12.d7
+- (2.67 ++) Depth: 30/36 00:00:05 11237kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6 Kf6 11.d7
+- (4.04 ++) Depth: 30/37 00:00:06 12413kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6 Kf6 11.d7
+- (6.09 ++) Depth: 30/40 00:00:07 13743kN
1.Kd3 Kg4 2.Ke4 Kh4 3.Kf5 Kg3 4.Ke6 Bd8 5.g6 Kxf4 6.Kf7 Bf6 7.Ke8 Kg5 8.d8Q Bxd8 9.Kxd8 Kxg6 10.d6 Kf6 11.d7
+- (9.16 ++) Depth: 30/40 00:00:08 15951kN
1.Kd3 Kg4 2.Ke4 Bd8 3.Ke5 g6 4.d6 Ba5 5.f5 Kxg5 6.f6 Bc3+ 7.Kd5 Bxf6 8.Ke6 Bd8 9.Kf7 Bb6 10.Ke8 Kf4 11.d8Q Bxd8 12.Kxd8 g5 13.Kc7 g4 14.d7 g3 15.d8Q g2 16.Qg8 Kf3 17.Kd6 Kf2 18.Qf7+ Ke2 19.Qe6+ Kf2 20.Qf6+ Ke2 21.Qe5+ Kf2 22.Qf5+ Ke2 23.Qe4+ Kf1 24.Qb1+ Kf2 25.Qb6+ Ke2 26.Ke5 Kf1 27.Qb5+ Ke1 28.Qb1+ Kf2
+- (11.91) Depth: 30/44 00:00:10 20325kN
Jouni
-
Jouni
- Posts: 3293
- Joined: Wed Mar 08, 2006 8:15 pm
Re: Difficult ending for Stockfish
SF 8.2.2014 is here clueless even after executing first 2 moves 1. Kd3 Kg4 :
[D]8/3Pb1p1/8/3P2P1/5Pk1/3K4/8/8 w - - 0 1
Analysis by Stockfish 080214 64 1cpu:
2.Ke4 g6 3.Ke5 Bd8 4.d6 Bb6 5.Kf6 Kxf4 6.Kxg6
+- (1.53) Depth: 7/7 00:00:00 2kN
2.Ke4 g6 3.Ke5 Bd8 4.d6 Bb6 5.Kf6 Kxf4 6.Kxg6
+- (1.53) Depth: 8/8 00:00:00 3kN
2.Ke4 g6 3.Ke5 Bd8 4.d6 Bb6 5.Kf6 Kxf4 6.Kxg6
+- (1.53) Depth: 9/9 00:00:00 4kN
2.Ke4 g6 3.Ke5 Bd8 4.d6 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kh5 Bxg5 8.d8R
= (0.00) Depth: 10/12 00:00:00 13kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8
= (0.25) Depth: 11/14 00:00:00 18kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8
= (0.00) Depth: 12/17 00:00:00 28kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 13/20 00:00:00 42kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 14/20 00:00:00 57kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 15/20 00:00:00 77kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 16/20 00:00:00 87kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 17/20 00:00:00 140kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 18/20 00:00:00 158kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 19/20 00:00:00 228kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 20/20 00:00:00 318kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 21/20 00:00:00 422kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 22/20 00:00:00 558kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 23/20 00:00:00 760kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 24/20 00:00:00 1003kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 25/20 00:00:00 1312kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 26/20 00:00:01 1726kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 27/20 00:00:01 2295kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 28/20 00:00:01 3101kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 29/20 00:00:02 4062kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 30/20 00:00:02 5218kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 31/20 00:00:03 6648kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 32/20 00:00:04 8400kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 33/20 00:00:05 10605kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 34/20 00:00:06 13391kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 35/20 00:00:07 16823kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 36/20 00:00:09 21155kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 37/20 00:00:11 25710kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 38/20 00:00:14 32248kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 39/20 00:00:18 41926kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 40/20 00:00:22 51769kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 41/20 00:00:28 65694kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 42/20 00:00:31 73695kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 43/20 00:00:38 90873kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 44/20 00:00:46 110mN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 45/20 00:00:56 137mN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 46/20 00:01:10 174mN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 47/20 00:01:24 211mN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 48/20 00:01:45 266mN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 49/20 00:02:20 366mN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 50/20 00:02:50 451mN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 51/20 00:03:28 557mN
Too much endgame knowledge is removed?
:[D]8/3Pb1p1/8/3P2P1/5Pk1/3K4/8/8 w - - 0 1
Analysis by Stockfish 080214 64 1cpu:
2.Ke4 g6 3.Ke5 Bd8 4.d6 Bb6 5.Kf6 Kxf4 6.Kxg6
+- (1.53) Depth: 7/7 00:00:00 2kN
2.Ke4 g6 3.Ke5 Bd8 4.d6 Bb6 5.Kf6 Kxf4 6.Kxg6
+- (1.53) Depth: 8/8 00:00:00 3kN
2.Ke4 g6 3.Ke5 Bd8 4.d6 Bb6 5.Kf6 Kxf4 6.Kxg6
+- (1.53) Depth: 9/9 00:00:00 4kN
2.Ke4 g6 3.Ke5 Bd8 4.d6 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kh5 Bxg5 8.d8R
= (0.00) Depth: 10/12 00:00:00 13kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8
= (0.25) Depth: 11/14 00:00:00 18kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8
= (0.00) Depth: 12/17 00:00:00 28kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 13/20 00:00:00 42kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 14/20 00:00:00 57kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 15/20 00:00:00 77kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 16/20 00:00:00 87kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 17/20 00:00:00 140kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 18/20 00:00:00 158kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 19/20 00:00:00 228kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 20/20 00:00:00 318kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 21/20 00:00:00 422kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 22/20 00:00:00 558kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 23/20 00:00:00 760kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 24/20 00:00:00 1003kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 25/20 00:00:00 1312kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 26/20 00:00:01 1726kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 27/20 00:00:01 2295kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 28/20 00:00:01 3101kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 29/20 00:00:02 4062kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 30/20 00:00:02 5218kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 31/20 00:00:03 6648kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 32/20 00:00:04 8400kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 33/20 00:00:05 10605kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 34/20 00:00:06 13391kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 35/20 00:00:07 16823kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 36/20 00:00:09 21155kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 37/20 00:00:11 25710kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 38/20 00:00:14 32248kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 39/20 00:00:18 41926kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 40/20 00:00:22 51769kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 41/20 00:00:28 65694kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 42/20 00:00:31 73695kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 43/20 00:00:38 90873kN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 44/20 00:00:46 110mN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 45/20 00:00:56 137mN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 46/20 00:01:10 174mN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 47/20 00:01:24 211mN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 48/20 00:01:45 266mN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 49/20 00:02:20 366mN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 50/20 00:02:50 451mN
2.d6 Bd8 3.Ke4 g6 4.Ke5 Ba5 5.Kf6 Kxf4 6.Kxg6 Bd8 7.Kf7 Bxg5 8.Ke8 Ke5 9.d8B Bxd8 10.Kxd8 Kxd6
= (0.00) Depth: 51/20 00:03:28 557mN
Too much endgame knowledge is removed?
Jouni
-
zullil
- Posts: 6442
- Joined: Tue Jan 09, 2007 12:31 am
- Location: PA USA
- Full name: Louis Zulli
Re: Difficult ending for Stockfish
[D]8/3Pb1p1/8/3P2P1/5P2/7k/4K3/8 w - - 0 1Jouni wrote:SF 8.2.2014 is here clueless
Too much endgame knowledge is removed?
Stockfish sig-8430785 64 SSE4.2 by Tord Romstad, Marco Costalba and Joona Kiiski
Code: Select all
info depth 33 seldepth 54 score cp 2481 nodes 153841257 nps 9473567 time 16239 multipv 1 pv e2d3 h3g3 d3e3 g3h4 e3d4 e7d8 g5g6 h4g4 d4e5 g4h5 f4f5 d8f6 e5e6 h5h6 e6f7 f6d8 f7e8 d8f6 d7d8q f6d8 e8d8 h6h5 d5d6 h5g4 d6d7 g4f4 d8e7 f4f5 d7d8q f5e5 d8c7 e5d4 c7d6 d4e4 d6d5 e4d5 e7f7
info nodes 153841257 time 16239
https://github.com/mcostalba/Stockfish/ ... 96a3d6ba9d
-
Jouni
- Posts: 3293
- Joined: Wed Mar 08, 2006 8:15 pm
Re: Difficult ending for Stockfish
Yes, obviously Retire null search verification is the reason. I was thinking if 8.2. version is broken, when it was so bad in solving endings!
Jouni
-
Michel
- Posts: 2272
- Joined: Mon Sep 29, 2008 1:50 am
Re: Difficult ending for Stockfish
I am trying to collect endgame positions that Stockfish can no longer solve after the removal of verification search. If you know such positions please post them here, or if you have an account on the Stockfish developers forum, please post them in this thread
https://groups.google.com/forum/?fromgr ... vPLxPAur-4
https://groups.google.com/forum/?fromgr ... vPLxPAur-4
-
bob
- Posts: 20943
- Joined: Mon Feb 27, 2006 7:30 pm
- Location: Birmingham, AL
Re: Difficult ending for Stockfish
I was looking at the position out of curiosity. Your PV looks strange, to say the least.Joerg Oster wrote:No problem for SF with my wrong_bishop_fix.Jouni wrote:[D]8/3Pb1p1/8/3P2P1/5P2/7k/4K3/8 w - - 0 1
Analysis by Stockfish 040114 64 1cpu:
1.d6 Bd8 2.Kf3 g6 3.Ke4 Kg4 4.Ke5
+- (1.89) Depth: 7/7 00:00:00 2kN
1.d6 Bd8 2.Kf3 g6 3.Ke4 Kg4 4.Ke5 Bb6
+- (1.83) Depth: 8/8 00:00:00 3kN
.
.
1.Kf3 Kh4 2.Ke4 Kg4 3.g6 Bf6 4.d6 Bd8 5.Ke5 Bf6+ 6.Ke4
= (0.00) Depth: 42/24 00:00:43 101mN
1.Kf3 Kh4 2.Ke4 Kg4 3.g6 Bf6 4.d6 Bd8 5.Ke5 Bf6+ 6.Ke4
= (0.00) Depth: 43/24 00:00:55 129mN
1.Kf3 Kh4 2.Ke4 Kg4 3.g6 Bf6 4.d6 Bd8 5.Ke5 Bf6+ 6.Ke4
= (0.00) Depth: 44/24 00:01:07 160mN
1.Kf3 Kh4 2.Ke4 Kg4 3.g6 Bf6 4.d6 Bd8 5.Ke5 Bf6+ 6.Ke4
= (0.00) Depth: 45/24 00:01:31 219mN.
.
.
1.Kd3 Kg4 2.Ke4 Bd8 3.Ke5 g6 4.d6 Kh4 5.Ke6 Kg4 6.f5 gxf5 7.g6 Bb6 8.g7
+/= (0.28 ++) Depth: 49/57 00:07:15 1136mN
Other engines solve instantly with 10-20 plies!
Code: Select all
info depth 20 seldepth 27 score cp 0 nodes 354763 nps 2124329 time 167 multipv 1 pv e2d3 h3g3 d5d6 e7d8 d3e3 g3g4 e3e4 d8b6 d7d8n b6d8 e4e5 g7g6 d6d7 d8c7 e5f6 c7d8 f6g6 g4f4 g6f7 d8g5 f7e6 f4g4 e6e5 g5d8 e5e4 d8b6 e4e5 info depth 21 seldepth 27 score cp 0 nodes 528660 nps 2288571 time 231 multipv 1 pv e2d3 h3g3 d5d6 e7d8 d3e3 g3g4 e3e4 g7g6 e4e5 d8a5 f4f5 g4g5 f5g6 g5g6 e5d5 g6f5 d5c6 f5e5 c6b7 e5d6 b7c8 d6e5 d7d8q a5d8 info depth 22 seldepth 34 score cp 4 nodes 704985 nps 2365721 time 298 multipv 1 pv e2d3 h3g3 d5d6 e7d8 d3e3 g3g4 e3e4 g7g6 e4e5 d8a5 f4f5 g4g5 e5e6 g6f5 e6e7 f5f4 d7d8q a5d8 e7d8 f4f3 d6d7 f3f2 d8c7 f2f1q d7d8q g5g4 d8g8 g4h4 g8h8 h4g3 h8c3 g3g4 c3g7 g4h4 g7h6 h4g3 h6g7 g3h4 info depth 23 seldepth 42 score cp 195 nodes 2333038 nps 2738307 time 852 multipv 1 pv e2d3 h3g3 d3e3 g3g4 e3e4 e7d8 e4e5 g4g3 g5g6 g3f3 f4f5 f3e3 e5e6 e3d4 d5d6 d8f6 e6f7 d4e5 f7e8 e5d6 d7d8q f6d8 e8d8 info depth 24 seldepth 42 score cp 604 nodes 4791728 nps 2871017 time 1669 multipv 1 pv e2d3 h3g3 d3e3 g3h4 e3d4 e7d8 g5g6 h4h5 f4f5 d8c7 d4c5 h5g5 c5c6 c7a5 c6b7 g5f5 b7c8 f5g6 d7d8q a5d8 c8d8 g6f6 d5d6 g7g5 d6d7 g5g4 d8c7 info depth 25 seldepth 42 score cp 610 nodes 5095120 nps 2865646 time 1778 multipv 1 pv e2d3 h3g3 d3e3 e7d8 e3e4 g3h3 e4e5 h3g4 g5g6 g4h5 f4f5 h5g5 e5e6 d8f6 e6f7 g5f5 d7d8q f6d8 f7g7 d8f6 g7f7 f6e5 d5d6 e5d6 g6g7 info depth 26 seldepth 44 score cp 877 lowerbound nodes 8832978 nps 2924827 time 3020 multipv 1 pv e2d3 h3g3 d3e3 e7d8 e3e4 g3h3 e4e5 h3g4 g5g6 g4h5 f4f5 h5g5 e5e6 d8f6 e6f7 g5f5 d7d8q f6d8 f7g7 d8f6 g7f7 f6e5 d5d6 e5d6 g6g7 d6c7 g7g8q c7f4 g8g6 f5e5 g6e6 e5d4 e6d7 d4c3 d7e7 f4d2 e7f6 c3b3 f7e6
in particular, the move g3h3 (6th move in last pv) really looks to be "out there". Crafty thinks that loses badly and quickly. Crafty likes Kg4 and continues to hold the draw score...