TCEC Season III Heating up.
Posted: Thu May 09, 2019 10:55 am
Does anyone have the game in a pgn file - this should never happen, some GUIs do not apply the 50 move rule correctly.Uri Blass wrote: ↑Fri May 10, 2019 5:21 pm stockfish had a forced draw.
It may be interesting if the fact that stockfish lost is result of a bug in handling the 50 move rule or some different problem because there is no logical reason to have 0.00 score for a losing position when the material is not equal.
Here is the last time that stockfish had a simple draw by perpetual check or winning the knight
[d]Q5K1/8/1kp1N3/7q/1P6/8/8/8 b - - 60 154
I believe that Qg4+ force a perpetual check or capturing the knight with a draw.
all the engines that I tried without tablebases chose Qg4+ with a draw evaluation so it is strange that stockfish chose Qg6+ when after Ng7 there is no check.
After Qg6+ Ng7 I believe that no forced draw can be seen.
[d]Q5K1/6N1/1kp3q1/8/1P6/8/8/8 b - - 62 155
tablebases say Kb5 or Qg5 is a draw even without the 50 move rule and maybe with the 6 piece tablebases you can prove that 155...Kb5 is a draw.
Not sure about it.
In any way after the game move 155...Qg4 the last chance was here when both Qd4 and Qh4 are draw by the 50 move rule and I wonder how much time engines need to see a draw score(note that the fifty move rule is inside the fen so the position is a draw)
[d]5K2/1k4N1/2p5/Q7/1P4q1/8/8/8 b - - 66 157
Using 7 man syzygy - the game was still drawn here after white's 157. Kf8:Uri Blass wrote: ↑Fri May 10, 2019 5:21 pm stockfish had a forced draw.
It may be interesting if the fact that stockfish lost is result of a bug in handling the 50 move rule or some different problem because there is no logical reason to have 0.00 score for a losing position when the material is not equal.
Here is the last time that stockfish had a simple draw by perpetual check or winning the knight
[d]Q5K1/8/1kp1N3/7q/1P6/8/8/8 b - - 60 154
I believe that Qg4+ force a perpetual check or capturing the knight with a draw.
all the engines that I tried without tablebases chose Qg4+ with a draw evaluation so it is strange that stockfish chose Qg6+ when after Ng7 there is no check.
After Qg6+ Ng7 I believe that no forced draw can be seen.
[d]Q5K1/6N1/1kp3q1/8/1P6/8/8/8 b - - 62 155
tablebases say Kb5 or Qg5 is a draw even without the 50 move rule and maybe with the 6 piece tablebases you can prove that 155...Kb5 is a draw.
Not sure about it.
In any way after the game move 155...Qg4 the last chance was here when both Qd4 and Qh4 are draw by the 50 move rule and I wonder how much time engines need to see a draw score(note that the fifty move rule is inside the fen so the position is a draw)
[d]5K2/1k4N1/2p5/Q7/1P4q1/8/8/8 b - - 66 157
Code: Select all
dep score nodes time (not shown: tbhits knps seldep)
42 +0.30 226.8M 1:39.50 Qd4 Nf5
41 +0.30 154.8M 1:08.99 Qd4 Nf5
40 +0.30 124.3M 0:55.87 Qd4
39 +0.30 116.4M 0:52.60 Qd4
38 +0.30 98.8M 0:44.91 Qd4 Nf5
37 +0.30 78.5M 0:35.93 Qd4 Nf5
36 +0.30 63.6M 0:29.38 Qd4 Nf5
35 +0.30 58.1M 0:26.90 Qd4
34 +0.30 52.3M 0:24.29 Qd4 Nf5
33 +0.30 40.9M 0:19.11 Qd4 Nf5
32 +0.30 24.2M 0:11.58 Qd4
31 +0.30 13.7M 0:06.27 Qd4
30 +0.30 8.32M 0:03.82 Qd4 Nf5
29 +0.30 7.45M 0:03.42 Qd4
28 +0.30 4.14M 0:01.95 Qd4 Nf5 Qf6+ Ke8 Qe6+ Kd8 Qg8+ Kd7 Qh7+ Ke6 Qg6+ Ke7 Qh7+ Kf6 Qh8+ Kg6 Qf8 Qc5 Qg8+ Kf6 Qh8+ Ke6 Qg8+ Ke7 Qh7+ Kd6 Qg6+ Ke5 Qh5 Kf4 Qf7 Qa5 Qc7+ Qxc7+ Kxc7 Ke3 Kb6
27 +0.30 2.65M 0:01.25 Qd4 Nf5 Qf6+ Ke8 Qe6+ Kd8 Qg8+ Kd7 Qh7+ Ke6 Qg8+ Ke5 Qe8+ Kf4 Qe6 Qc5 Qf7 Ke5 Qh5 Kf6 Qh8+ Ng7 Qh4+ Kf7 Qf4+ Nf5 Qc7+ Kg6 Qd7 Kf6 Qd8+ Qe7+ Qxe7+ Kxe7 Kb6 Kd7 Kb5
26 +0.30 2.41M 0:01.14 Qd4 Nf5 Qf6+ Ke8 Qe6+ Kd8 Qg8+ Kd7 Qh7+ Ke6 Qg8+ Ke5 Qe8+ Kf4 Qe6 Qc5 Qf7 Kg5 Qg8+ Kf6 Qh8+ Ng7 Qh4+ Kf7 Qf4+ Nf5 Qc7+ Kf6 Qd8+ Qe7+ Qxe7+ Kxe7 Kb6 Kd7 Kb5
25 +0.30 2.37M 0:01.12 Qd4 Nf5 Qf6+ Ke8 Qe6+ Kd8 Qg8+ Kd7 Qh7+ Ke6 Qg6+ Ke5 Qe8+ Kf4 Qe6 Qc5 Qf6 Ke4 Qg6 Kd4 Qg4+ Ke5 Qh5 Kf4 Qf7 Kg5 Qg8+ Kf6 Qh8+ Kg6 Qb2 Nd6+ Kb8 Qxc6 Qxb4 Kf5
24 +0.30 2.18M 0:01.03 Qh4 Nf5 Qh8+ Ke7 Qh7+ Kf6 Qh8+ Kg6 Qf8 Qc5 Qg8+ Kf6 Qh8+ Ng7 Qd8+ Kf5 Qd3+ Ke5 Qg3+ Kf6 Qh4+ Kf7 Qf4+ Nf5 Qc7+ Ne7 Qf4+ Ke8 Qc7 Qd4 Ka6 Qd3+ Kb6 b5 Qb8+ Kd7 cxb5 Qg6+ Kc5 Qg1+ Kc4 Nc6
23 +0.30 1.90M 0:00.88 Qh4 Nf5 Qh8+ Ke7 Qh7+ Kf6 Qh8+ Kg6 Qf8 Qc5 Qg8+ Kf6 Qh8+ Kg5 Qd8+ Ne7 Qd2+ Kg6 Qg2+ Kf6 Qh1 Kg7 Qg2+ Kf8 Qh1 Ke8 Qh8+ Kd7 Qh3+ Qf5 Qxf5+ Nxf5 Kb6 Nd6 c5 b5
22 +0.30 245707 0:00.12 Qh4 Nf5 Qf6+ Ke8 Qg6+ Ke7 Qh7+ Kf6 Qh8+ Kg6 Qf8 Qc5 Qg8+ Ng7 Qc8 Qd6 Qb8 Qe7+ Qc7 Qe4 Qg3+ Kf6 Kb6 Qd4+ Kb5 Ne6 Qh2 Qc5+ Ka4 Qxc6+ Kxb4 Qc5+ Ka4
21 +0.30 222342 0:00.11 Qh4 Nf5 Qf6+ Ke8 Qg6+ Ke7 Qh7+ Kf6 Qh8+ Kg6 Qg8+ Ng7 Qc4 Qc5 Qg8 Kf6 Qd8+ Kf7 Qc7+ Kg6 Qg3+ Kf6 Qh4+ Kf7 Qf4+ Nf5 Qc7+ Kg6 Qb8 b5 cxb5 Qxb5+ Ka8
20 +0.30 142640 0:00.07 Qh4 Nf5 Qf6+ Ke8 Qg6+ Ke7 Qh7+ Kf6 Qh8+ Kg6 Qg8+ Ng7 Qc4 Qc5 Qg8 Kf6 Qd8+ Kf7 Qc7+ Kg6 Qg3+ Kf6 Qh4+ Kf7 Qf4+ Nf5 Qc7+ Kg6 Qb8 b5 cxb5 Qxb5+ Ka8
19 +0.30 119203 0:00.06 Qh4 Nf5 Qf6+ Ke8 Qg6+ Ke7 Qh7+ Kf6 Qh8+ Kg6 Qg8+ Ng7 Qc4 Qc5 Qg8 Kf6 Qd8+ Kf7 Qc7+ Kg6 Qg3+ Kf6 Qh4+ Kf7 Qf4+ Nf5 Qc7+ Kg6 Qb8 Kg5 Qg8+ Kf4 Qf7 b5 cxb5 Qxb5+ Ka7 Qc5+ Kb7
18 +0.30 91040 0:00.05 Qh4 Nf5 Qf6+ Ke8 Qg6+ Ke7 Qh7+ Kf6 Qh8+ Ke6 Qg8+ Kd7 Qh7+ Ne7 Qh3+ Qf5 Qxf5+ Nxf5 Kb6 Nd6 c5 b5
17 +0.30 65772 0:00.03 Qh4 Nf5 Qf6+ Ke8 Qg6+ Ke7 Qh7+ Kf6 Qh8+ Kg6 Qg8+ Ng7 Qc4 Qc5 Qg8 Kf6 Qd8+ Kf7 Qc7+ Kg6 Qg3+ Kf6 Qh4+ Kf7 Qf4+ Nf5 Qc7+ Kg6 Qb8 b5 cxb5 Qxb5+ Kc7
16 +0.30 14439 0:00.01 Qh4 Nf5 Qf6+ Ke8 Qh8+ Ke7 Qh7+ Kf6 Qh8+ Kg6 Qf8 Qc5 Qg8+ Kf6 Qh8+ Ke7 Qh7+ Kd6 Qg6+ Kd7 Qh7+ Ne7 Qh3+ Qf5 Qxf5+ Nxf5 Kb6 Nd6 c5 b5 c4
15 +0.30 12740 0:00.01 Qh4 Nf5 Qf6+ Ke8 Qh8+ Ke7 Qh7+ Kf6 Qh8+ Kg6 Qf8 Qc5 Qg8+ Kf6 Qh8+ Ke7 Qh7+ Kd6 Qg6+ Kd7 Qh7+ Ne7 Qh3+ Qf5 Qxf5+ Nxf5 Kb6
14 +0.30 7713 0:00.01 Qh4 Nf5 Qf6+ Ke8 Qh8+ Ke7 Qh7+ Kf6 Qh8+ Kg6 Qg8+ Ng7 Qb3 Qc5 Qg8 Kf6 Qd8+ Kf7 Qc7+ Kg6 Qc8 Qd6 Kb6 Ne6 Qg8+ Kf6 Qh8+ Kg5 Qg8+ Kf4 Qf7+ Ke3 Qe8 b5 Kxb5 Qc5+ Ka4
13 +0.30 3060 0:00.00 Qh4 Nf5 Qf6+ Ke8 Qh8+ Kf7 Qh5+ Ke7 Qh7+ Kf6 Qh8+ Ke6 Qg8+ Kd7 Qh7+ Ne7 Qh3+ Qf5 Qxf5+ Nxf5 Kb6 Nd6 c5 b5
12 +0.30 2567 0:00.00 Qh4 Nf5 Qf6+ Ke8 Qh8+ Kf7 Qh5+ Ke7 Qh7+ Kf6 Qh8+ Ke6 Qg8+ Kd7 Qh7+ Ne7 Qh3+ Qf5 Qxf5+ Nxf5 Kb6 Nd6 c5
11 +0.30 2098 0:00.00 Qh4 Nf5 Qf6+ Ke8 Qh8+ Kf7 Qh5+ Ke7 Qh7+ Kf6 Qh8+ Ke6 Qg8+ Kd7 Qh7+ Ne7 Qh3+ Qf5 Qxf5+ Nxf5 Kb6 Nd6
10 +0.30 1736 0:00.00 Qh4 Nf5 Qf6+ Ke8 Qh8+ Kf7 Qh5+ Ke7 Qh7+ Kf6 Qh8+ Ke6 Qg8+ Kd7 Qh7+ Ne7 Qh3+ Qf5 Qxf5+ Nxf5 Kb6
9 +0.30 1393 0:00.00 Qh4 Nf5 Qf6+ Ke8 Qh8+ Kf7 Qh5+ Ke7 Qh7+ Kf6 Qh8+ Ke6 Qg8+ Kd7 Qh7+ Ne7 Qh3+ Qf5 Qxf5+ Nxf5 Kb6 Nd6
8 +0.30 977 0:00.00 Qh4 Nf5 Qf6+ Ke8 Qh8+ Kf7 Qh5+ Ke7 Qh7+ Kf6 Qh8+ Ke6 Qg8+ Kd7 Qh7+ Ne7 Qh3+ Qf5 Qxf5+ Nxf5 Kb6
7 +0.30 738 0:00.00 Qh4 Nf5 Qf6+ Ke8 Qh8+ Kf7 Qh5+ Ke7 Qh7+ Kf6 Qh8+ Ke6 Qg8+ Kd7 Qh7+ Ne7 Qh3+ Qf5 Qxf5+ Nxf5 Kb6
6 +0.30 526 0:00.00 Qh4 Nf5 Qf6+ Ke8 Qh8+ Kf7 Qh5+ Ke7 Qh7+ Kf6 Qh8+ Ke6 Qg8+ Kd7 Qh7+ Ne7 Qh3+ Qf5 Qxf5+ Nxf5 Kb6
5 +0.30 317 0:00.00 Qh4 Nf5 Qf6+ Ke8 Qh8+ Kf7 Qh5+ Ke7 Qh7+ Kf6 Qh8+ Ke6 Qg8+ Ke5 Qe8+ Kd4 Qd7+ Kc3
4 +0.30 221 0:00.00 Qh4 Nf5 Qf6+ Ke8 Qh8+ Kf7 Qh5+ Ke7 Qh7+ Kf6 Qh8+ Ke6 Qg8+ Ke5 Qe8+ Kd4 Qd7+ Kc3
3 +0.30 121 0:00.00 Qh4 Nf5 Qf6+ Ke8 Qh8+ Kf7 Qh5+ Ke7 Qh7+ Kf6 Qh8+ Kg6
2 +0.30 70 0:00.00 Qh4 Nf5 Qf6+ Ke8 Qh8+ Kf7 Qh5+ Ke7 Qh7+ Kf6
1 +0.30 29 0:00.00 Qh4 Nf5 Qf6+ Ke8
Code: Select all
dep score nodes time (not shown: tbhits knps seldep)
26 +100.00 11.5M 0:05.45 Qe5
25 +100.00 6.48M 0:03.00 Qe5
24 +100.00 3.62M 0:01.68 Qe5 Qg4 Qe7+ Ka6 Ne6 Qh3 Nc5+ Kb5 Qb7+ Kc4 Qa6+ Kd5 Qa2+ Kd6 Qd2+ Kc7 Qf4+ Kc8 Qf6 Qh1 Qf5+ Kb8 Ke7 Qh2 Kd7 Qc7+ Ke8 Qh2 b5 cxb5 Nd7+ Kc8 Ne5+ Kb7 Qd7+ Kb6 Qd6+ Kb7 Qd5+ Ka7 Kd7 Qh7+ Kd8 b4 Qb5
23 +100.00 1.76M 0:00.86 Qe5 Qg4 Qe7+ Ka8 Qc5 Qg2 Nf5 Qh1 Qa5+ Kb8 Qe5+ Ka8 Ke8 Kb7 Ke7 Qh7+ Kf8 Qd7 Nd6+ Kc7 Ne4+ Kc8 Qe8+ Qxe8+ Kxe8 Kc7 Ke7
22 +100.00 374537 0:00.18 Qe5 Qb1 Qe7+ Ka6 Qc5 Qh1 Kf7 Kb7 Nf5 Qh7+ Kf6 Qh8+ Ke7 Qh7+ Kd6 Qg6+ Ke5 Qh5 Qf8 Kc7 Qe7+ Kb6 Qd8+ Ka6 Qa8+ Kb5 Qa5+ Kc4 Kd6 Qg6+ Kc7 Qf7+ Kxc6 Qe8+ Kc7 Qf7+ Kd6 Qf8+ Ne7 Qb8+ Kd7 Qxb4
21 +100.00 349935 0:00.17 Qe5 Qb1 Qe7+ Ka6 Qc5 Qh1 Kf7 Kb7 Nf5 Qh7+ Kf6 Qh8+ Ke7 Qh7+ Kd6 Qg6+ Ke5 Qh5 Qa5 Qe8+ Kd4 Qd7+ Ke3 Qe8+ Kf2 Qf8 Ke2 Qf6 Kd3 Qe6 Qc5 Qa2 b5 Qb3+ Kd2 Qa2+ Ke3 Qb3+ Kf2 Qb2+ Kf3
20 +100.00 276103 0:00.14 Qe5 Qb1 Qe7+ Ka6 Qc5 Qh1 Kf7 Kb7 Kg8 Qd1 Kf8 Qh1 Ne6 Qh6+ Ke7 Qh7+ Kd8 Qd3+ Nd4 Qg6 Nf5 Qg8+ Ke7 Qh7+ Kd6 Qh1 Qa5 Qh2+ Ke6 Qh3 b5 cxb5 Qxb5+ Kc7
19 +100.00 232726 0:00.12 Qe5 Qb1 Qd6 Qh7 Qe7+ Kb6 Qc5+ Kb7 Kf7 Qh8 Qe7+ Kb6 Qe5 Kb7 Qe4 Qd8 Ne6 Qh8 Qf5 Qh6 Qe5 Qh7+ Kf8 Qh6+ Ke8 Qg6+ Kd7 Qh7+ Ng7 Qd3+ Qd6 Qxd6+ Kxd6 Kb6
18 +100.00 129193 0:00.07 Qe5 Qb1 Qe7+ Ka6 Qc5 Qh1 Kf7 Kb7 Nf5 Qh7+ Kf6 Qh8+ Kg5 Qg8+ Kf4 Qf7 Ke5 Qh5 Qa5 Qe8+ Kf4 Qb8+ Qe5 Qxe5+ Kxe5 Kb6 Nd6
17 +100.00 89269 0:00.05 Qe5 Qb1 Qe7+ Ka6 Qc5 Qh1 Kf7 Kb7 Kg8 Qe4 Kf8 Qh7 Ne6 Qh8+ Ke7 Qh7+ Kd8 Qd3+ Qd4 Qxd4+ Nxd4 Kb6 Kc8
16 +100.00 51910 0:00.03 Qe5 Qb1 Qe7+ Ka6 Qc5 Qf1+ Kg8 Qf3 Ne8 Kb7 Nd6+ Kc7 Nc4 Qg2+ Kf8 Kb8 Ne5 Kb7 b5 Qf1+ Ke8 Qxb5
15 +100.00 46081 0:00.03 Qe5 Qb1 Qe7+ Ka6 Qc5 Qf1+ Ke7 Qe2+ Kf7 Kb7 Qd6 Kb6 Ne6 Qh5+ Kg7 Qg4+ Kf8 Qf5+ Ke7 Qh7+ Kd8 Qh8+ Kd7 Qh7+ Kc8 Qh8+ Nd8 Kb5 Qc5+ Ka4 Qxc6+ Kxb4 Qb7+ Ka4
14 +100.00 23091 0:00.02 Qe5 Qb1 Qe7+ Ka6 Qc5 Qf1+ Ke7 Qe2+ Kf7 Qf3+ Nf5 Qh5+ Ke6 Qe8+ Ne7 Kb7 Qe5 Qd8 Qa5 Qxa5 bxa5 c5
13 +100.00 19177 0:00.01 Qe5 Qb1 Qe7+ Ka6 Qc5 Qf1+ Ke7 Qe2+ Kf7 Qf3+ Nf5 Qh5+ Ke6 Qe8+ Ne7 Kb7 Qe5 Qd8 Qa5 Qxa5 bxa5 c5
12 +100.00 17407 0:00.01 Qe5 Qb1 Qc5 Qh7 Ne6 Qh8+ Ke7 Qh7+ Kd8 Qd3+ Qd4 Qxd4+ Nxd4 Kb6
11 +100.00 11205 0:00.01 Qe5 Qh7 Nf5 Ka8 Qa5+ Kb8 Qb6+ Qb7 Qd8+ Ka7 Qa5+ Qa6 Nd6 Qxa5 bxa5 Ka6
10 +100.00 8262 0:00.01 Qe5 Qb1 Qe7+ Ka6 Qc5 Qh1 Kf7 Qd5+ Kf6 Qd8+ Kg6 Qd5 b5+ Ka5 Qxd5 cxd5
9 +100.00 2134 0:00.00 Qe5 Qh7 Nf5 Ka8 Qa5+ Kb8 Qb6+ Qb7 Qd8+ Ka7 Qa5+ Kb8 Ne7 Qc7 Ke8 Qxa5 Nxc6+ Kc7 Nxa5
8 +100.00 1084 0:00.00 Qe5 Qh7 Nf5 Ka8 Ne7 Kb7 b5 Qh6+ Ke8 cxb5
7 +100.00 996 0:00.00 Qe5 Qh7 Nf5 Ka8 Ne7 Kb7 b5 Qh6+ Ke8 cxb5
6 +100.00 743 0:00.00 Qe5 Qh7 Nf5 Ka8 Qa5+ Kb8 Nd6 Qh6+ Ke7 Qh4+ Kd7 Qh7+ Kxc6 Qd7+ Kd5 Qc6+ Ke5
5 +100.00 277 0:00.00 Qe5 Qh7 Nf5 Qc7 Nd6+ Kb8 Nc4 Qxe5 Nxe5 Kb7
4 +100.00 238 0:00.00 Qe5 Qh7 Nf5 Qc7 Nd6+ Kb8 Nc4 Qxe5 Nxe5 Kb7
3 +100.00 196 0:00.00 Qe5 Qh7 Nf5 Qc7 Nd6+ Kb8 Nc4 Qxe5 Nxe5 Kb7
2 +100.00 149 0:00.00 Qe5 Qh7 Nf5 Qc7 Nd6+ Kb8 Nc4 Qxe5 Nxe5 Kb7
1 +100.00 27 0:00.00 Qe5 Qh7 Nf5 Qc7 Nd6+ Ka8