Pathetic lack of execution (can your engine find c4?)

Discussion of anything and everything relating to chess playing software and machines.

Moderator: Ras

pijl

Re: Pathetic lack of execution (can your engine find c4?)

Post by pijl »

Mine does. The Baron chooses c4 instantly, then switches to Nxd3 with c4 a little later in the pv.

Code: Select all

ply   score   time           nodes pv
 4.   1.470   0:00.10          925 c5c4 d3c2 c4c3 e3d4
 5&   1.463   0:00.10         1378 c5c4 d3c2 c4c3 e3d4 d6e6
 5.   1.463   0:00.12         1665 c5c4 d3c2 c4c3 e3d4 d6e6
 6&   1.197   0:00.14         3220 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6
 6.   1.197   0:00.15         3915 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6
 7&   0.926   0:00.17         6657 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6 d3d4
 7.   0.926   0:00.20         8997 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6 d3d4
 8&   0.910   0:00.23        16246 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5b6 d3d4 b6c6 c4c5
 8.   0.910   0:00.25        21718 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5b6 d3d4 b6c6 c4c5
 9&   0.790   0:00.29        39055 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5b6 d3c2 b6c6 c2b3
 9.   0.790   0:00.34        54457 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5b6 d3c2 b6c6 c2b3
10&   0.379   0:00.42        89554 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6 d3d4 c6d7 c4c5 d7e6
10.   0.379   0:00.54 138147 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6 d3d4 c6d7 c4c5 d7e6
11&   0.460   0:00.73       225382 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6 d3e3 c6b6 e3d4 b6c7 c4c5
11.   0.460   0:00.89 283477 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6 d3e3 c6b6 e3d4 b6c7 c4c5
12&   0.397   0:01.21       466212 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6 d3d4 c6b6 c4c5 b6c6 d4c4 c6c7 c4b3
12.   0.397   0:01.37       545645 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6 d3d4 c6b6 c4c5 b6c6 d4c4 c6c7 c4b3
13&   0.460   0:02.04       907603 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6 d3d4 c6b6 c4c5 b6c6 d4c4 c6b7 c4d4 b7c7
13.   0.460   0:02.59      1203119 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6 d3d4 c6b6 c4c5 b6c6 d4c4 c6b7 c4d4 b7c7
14&   0.460   0:03.90      1935884 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6 d3d4 c6b6 c4c5 b6c6 d4c4 c6b7 c4d3 b7c7 d3d4
14.   0.460   0:04.56      2313675 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6 d3d4 c6b6 c4c5 b6c6 d4c4 c6b7 c4d3 b7c7 d3d4
15&   0.460   0:08.37      4291392 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6 d3d4 c6b6 c4c5 b6c6 d4c4 c6c7 c4d3 c7b7 d3d4 b7c7
15.   0.460   0:09.71      4977053 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 c5c6 d3d4 c6b6 c4c5 b6c6 d4c4 c6c7 c4d3 c7b7 d3d4 b7c7
16&   0.446   0:14.71      7548041 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 b4b3 d3c3 b3b2 c3b2 c5c4 b2c2 c4b4 c2d3 b4a4 d3c4 a4a3 c4d4
16.   0.446   0:21.03     10378262 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 b4b3 d3c3 b3b2 c3b2 c5c4 b2c2 c4b4 c2d3 b4a4 d3c4 a4a3 c4d4
17&   0.376   0:34.60     16239538 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 b4b3 d3c3 b3b2 c3b2 c5c4 b2c2 c4b4 c2d3 b4a4 d3c4 a4a3 c4b5
17.   0.376   0:45.39     21289625 c5c4 d3c4 e5c4 b3c4 d6c5 e3d3 b4b3 d3c3 b3b2 c3b2 c5c4 b2c2 c4b4 c2d3 b4a4 d3c4 a4a3 c4b5
18&   0.495   1:18.62     36436880 c5c4 d3c4 e5c4 b3c4 b4b3 e3d2 d6c5 d2c3 b3b2 c3b2 c5c4 b2c2 c4b4 c2d3 b4a4 e4e5 f6e5 h3h4 g5h4 d3e2 h4h3 e2f1 h3h2
18.   0.495   1:32.45     42883651 c5c4 d3c4 e5c4 b3c4 b4b3 e3d2 d6c5 d2c3 b3b2 c3b2 c5c4 b2c2 c4b4 c2d3 b4a4 e4e5 f6e5 h3h4 g5h4 d3e2 h4h3 e2f1 h3h2
19&   0.379   3:14.79     88757310 c5c4 d3c4 e5c4 b3c4 d6e5 e3d3 e5e6 d3d2 e6d7 d2e2 d7c6 e2e3 c6c5 e3d3
19&   0.543   3:56.28    111411640 e5d3 e3d3 d6e5 d3e3 c5c4 b3c4 b4b3 e3d2 e5d4 c4c5 b3b2 d2c2 d4c5 c2b2 c5b4 b2c2 b4a4 c2c3 a4a3
19.   0.543   4:01.04    113953762 e5d3 e3d3 d6e5 d3e3 c5c4 b3c4 b4b3 e3d2 e5d4 c4c5 b3b2 d2c2 d4c5 c2b2 c5b4 b2c2 b4a4 c2c3 a4a3
Top
Edsel Apostol
Posts: 803
Joined: Mon Jul 17, 2006 5:53 am
Full name: Edsel Apostol

Re: Pathetic lack of execution (can your engine find c4?)

Post by Edsel Apostol »

[d]8/8/3k1p2/p1p1n1p1/Pp2P1P1/1P1BK2P/8/8 b - - 3 46 bm c4

Twisted Logic finds it at depth 17 in 1 second.

Code: Select all

T20090904:
  8/12	00:00	       7.570	0	 0.00	Ne5xd3 Ke3xd3 Kd6c7 Kd3d2 Kc7d6 Kd2d3
  8/14	00:00	      12.564	0	+0.09	Ne5g6 Bd3f1 Kd6e5 Ke3d3 Ke5e6 Kd3e3 Ng6e5 Bf1b5
  9/14	00:00	      18.985	0	+0.17	Ne5g6 Bd3f1 Kd6e5 Ke3d3 Ng6f4+ Kd3e3 Nf4e6 Bf1b5 Ne6d4 Bb5c4
 10/16	00:00	      26.420	0	 0.00	Ne5g6 Bd3f1 Kd6e5 Ke3d3 Ng6f4+ Kd3e3 Nf4e6 Bf1c4 Ne6f4 Bc4f1
 11/16	00:00	      41.869	0	+0.05	Ne5g6 Bd3f1 Kd6e5 Ke3d3 Ng6f4+ Kd3e3 Nf4e6 Bf1c4 Ne6d4 Bc4d5 Ke5d6 Bd5c4
 12/19	00:00	      63.233	0	 0.00	Ne5g6 Bd3f1 Kd6e5 Ke3d3 Ng6f4+ Kd3e3 Nf4e6 Bf1c4 Ne6d4 Bc4d5 Ke5d6 Bd5c4 Kd6e5
 13/20	00:00	     102.084	0	+0.18	Ne5g6 Bd3f1 Kd6e5 Ke3d3 Ng6f4+ Kd3e3 c5c4 Bf1xc4 Nf4xh3 Bc4b5 Nh3f4 Bb5c4 Nf4g2+ Ke3d3 Ng2e1+ Kd3e3 Ne1c2+ Ke3f3
 14/22	00:00	     138.632	0	+0.10	Ne5g6 Bd3f1 Kd6e5 Ke3d3 Ng6f4+ Kd3e3 c5c4 Bf1xc4 Nf4xh3 Bc4b5 Nh3f4 Bb5c4 Nf4e6 Bc4xe6 Ke5xe6 Ke3d4
 15/21	00:00	     193.090	0	+0.12	Ne5g6 Bd3f1 Kd6e5 Ke3d3 Ng6f4+ Kd3e3 c5c4 Bf1xc4 Nf4xh3 Bc4b5 Nh3f4 Bb5c4 Nf4g6 Bc4b5 Ng6e7 Bb5c4
 16/23	00:00	     281.270	0	+0.10	Ne5g6 Bd3f1 Kd6e5 Ke3d3 Ng6f4+ Kd3e3 c5c4 Bf1xc4 Nf4xh3 Bc4b5 Nh3f4 Bb5c4 Nf4e6 Bc4xe6 Ke5xe6 Ke3d3 Ke6d6 Kd3d4
 17/27	00:00	     385.034	0	+0.12	Ne5g6 Bd3f1 Kd6e5 Ke3d3 Ng6f4+ Kd3e3 c5c4 Bf1xc4 Nf4xh3 Bc4b5 Nh3f4 Bb5c4 Nf4g6 Bc4d5 Ng6e7 Bd5f7 Ne7c6 Bf7c4
17/28	00:01	     475.494	0	+0.14	c5c4 Bd3xc4 Ne5xc4+ b3xc4 b4b3 Ke3d3 b3b2 Kd3c2 Kd6c5 Kc2xb2 Kc5xc4 Kb2c2 Kc4d4 Kc2d2 Kd4xe4 Kd2e2 Ke4f4 Ke2f2 Kf4e5 Kf2e3
 18/31	00:01	     553.414	0	+0.18	c5c4 Bd3xc4 Ne5xc4+ b3xc4 b4b3 Ke3d3 b3b2 Kd3c2 Kd6c5 Kc2xb2 Kc5xc4 Kb2c2 Kc4b4 Kc2d3 Kb4xa4 Kd3c4 Ka4a3 Kc4b5 a5a4 Kb5c4 Ka3b2
 19/30	00:01	     674.505	0	+0.21	c5c4 Bd3xc4 Ne5xc4+ b3xc4 b4b3 Ke3d3 b3b2 Kd3c2 Kd6c5 Kc2xb2 Kc5xc4 Kb2c2 Kc4b4 Kc2d3 Kb4xa4 Kd3c4 Ka4a3 e4e5 f6xe5 Kc4d5 a5a4 Kd5xe5
 20/32	00:01	     918.833	851.559	+0.37	c5c4 Bd3xc4 Ne5xc4+ b3xc4 b4b3 Ke3d3 b3b2 Kd3c2 Kd6c5 Kc2xb2 Kc5xc4 Kb2c2 Kc4b4 Kc2d3 Kb4xa4 Kd3c4 Ka4a3 e4e5 f6xe5 Kc4d5 a5a4 Kd5xe5 Ka3b4
 21/33	00:01	   1.333.520	947.775	+0.46	c5c4 Bd3xc4 Ne5xc4+ b3xc4 b4b3 Ke3d3 b3b2 Kd3c2 Kd6c5 Kc2xb2 Kc5xc4 Kb2c2 Kc4b4 Kc2d3 Kb4xa4 Kd3c4 Ka4a3 e4e5 f6xe5 Kc4d5 a5a4 Kd5xe5 Ka3b4 Ke5d4
 22/36	00:02	   2.825.778	1.130.311	+1.15	c5c4 Bd3xc4 Ne5xc4+ b3xc4 b4b3 Ke3d3 b3b2 Kd3c2 Kd6c5 Kc2xb2 Kc5xc4 Kb2c2 Kc4b4 Kc2d3 Kb4xa4 Kd3c4 Ka4a3 Kc4c3 a5a4 Kc3c2 Ka3b4 Kc2b2 a4a3+ Kb2a2 Kb4a4 Ka2b1
 23/39	00:04	   4.502.012	1.210.543	+1.21	c5c4 Bd3xc4 Ne5xc4+ b3xc4 b4b3 Ke3d3 b3b2 Kd3c2 Kd6c5 Kc2xb2 Kc5xc4 Kb2c2 Kc4b4 Kc2d3 Kb4xa4 Kd3c4 Ka4a3 Kc4c3 a5a4 Kc3c2 Ka3b4 Kc2b2 a4a3+ Kb2a2 Kb4a4 Ka2b1 Ka4b4
 24/46	00:06	   7.916.480	1.200.558	+1.21	c5c4 Bd3xc4 Ne5xc4+ b3xc4 b4b3 Ke3d3 b3b2 Kd3c2 Kd6c5 Kc2xb2 Kc5xc4 Kb2c2 Kc4b4 Kc2d3 Kb4xa4 Kd3c2 Ka4b4 Kc2b2 a5a4 Kb2a2 a4a3 Ka2a1 Kb4b5 Ka1a2 Kb5a4 Ka2b1 Ka4b4
 25/43	00:08	  10.399.350	1.227.931	+1.15	c5c4 Bd3xc4 Ne5xc4+ b3xc4 b4b3 Ke3d3 b3b2 Kd3c2 Kd6c5 Kc2xb2 Kc5xc4 Kb2c2 Kc4b4 Kc2d3 Kb4xa4 Kd3c2 Ka4b4 Kc2b2 Kb4b5 Kb2c3 a5a4 Kc3b2 Kb5b4 Kb2a1 a4a3 Ka1a2 Kb4a4 Ka2b1
 26/45	00:13	  16.059.078	1.245.758	+1.12	c5c4 Bd3xc4 Ne5xc4+ b3xc4 b4b3 Ke3d3 b3b2 Kd3c2 Kd6c5 Kc2xb2 Kc5xc4 Kb2c2 Kc4b4 Kc2d3 Kb4xa4 Kd3c4 Ka4a3 Kc4c3 a5a4 Kc3c2 Ka3b4 Kc2b2 Kb4a5 Kb2c3 Ka5b5 Kc3c2 Kb5c5 Kc2c3 a4a3
 27/48	00:20	  25.603.315	1.279.142	+1.01	c5c4 Bd3xc4 Ne5xc4+ b3xc4 b4b3 Ke3d3 b3b2 Kd3c2 Kd6c5 Kc2xb2 Kc5xc4 Kb2c2 Kc4b4 Kc2d3 Kb4xa4 Kd3c4 Ka4a3 Kc4c3 a5a4 Kc3c2 Ka3b4 Kc2b2 Kb4a5 Kb2c3 Ka5b5 Kc3b2 Kb5b4 Kb2b1 Kb4b3 Kb1c1
 28/51	00:54	  68.176.516	1.263.253	+1.40	c5c4 Bd3xc4 Ne5xc4+ b3xc4 b4b3 Ke3d3 b3b2 Kd3c2 Kd6c5 Kc2xb2 Kc5xc4 Kb2c2 Kc4b4 Kc2d3 Kb4xa4 Kd3c4 Ka4a3 Kc4c3 a5a4 Kc3c2 Ka3b4 Kc2b2 a4a3+ Kb2a2 Kb4a4 Ka2b1 Ka4b5 Kb1a2 Kb5b4 Ka2a1 Kb4b3 Ka1b1
 29/51	02:07	 157.215.914	1.235.488	+1.88	c5c4 Bd3xc4 Ne5xc4+ b3xc4 b4b3 Ke3d3 b3b2 Kd3c2 Kd6c5 Kc2xb2 Kc5xc4 Kb2c2 Kc4b4 Kc2d3 Kb4xa4 Kd3c4 Ka4a3 Kc4c3 a5a4 Kc3c2 Ka3b4 Kc2b2 a4a3+ Kb2a2 Kb4a4 Ka2a1 Ka4b3 Ka1b1 a3a2+ Kb1a1 Kb3a3 e4e5 f6xe5 h3h4
 30/57	03:19	 239.956.469	1.202.126	+1.34	c5c4 Bd3xc4 Ne5xc4+ b3xc4 b4b3 Ke3d3 b3b2 Kd3c2 Kd6c5 Kc2xb2 Kc5xc4 Kb2c2 Kc4b4 Kc2d3 Kb4xa4 Kd3c4 Ka4a3 Kc4c3 a5a4 Kc3c2 Ka3b4 Kc2b2 Kb4c5 Kb2c3 Kc5b5 Kc3b2 Kb5b4 Kb2b1 Kb4b3 Kb1c1 a4a3 Kc1b1 Kb3c4
Top
bob
Posts: 20943
Joined: Mon Feb 27, 2006 7:30 pm
Location: Birmingham, AL

Re: Pathetic lack of execution (can your engine find c4?)

Post by bob »

michiguel wrote:In ICC. after a middlegame that would make Capablanca proud, Gaviota playing black reached this won endgame. c4 wins easily, but.. Gaviota did not find it, fool around for 50 moves, trade c5 for the h3 pawn to avoid a draw, let the opponent king to have better mobility and lost !@#$!#.
I was watching this on ICC waiting for c4 (there were like 20 opportunities) and banging my head against the monitor.

[d]8/8/3k1p2/p1p1n1p1/Pp2P1P1/1P1BK2P/8/8 b - - 3 46 bm c4

Can your engine find c4 in blitz? It looks too easy!

I truly believe that endgame play is much more important than what people think. Another position for the to-do list...

Miguel
PS: Full game Jekyll-Hyde style

[Event "ICS rated blitz match"]
[Site "207.99.83.228"]
[Date "2009.09.05"]
[Round "-"]
[White "chepla"]
[Black "Gaviota"]
[Result "1-0"]
[WhiteElo "2710"]
[BlackElo "2725"]
[TimeControl "180+2"]

1.d4 d5 2.Nf3 Nf6 3.c4 dxc4 4.e3 Bg4 5.Bxc4 e6 6.h3 Bh5 7.Nc3 a6 8.g4 Bg6 9.Ne5
Nbd7 10.Nxg6 hxg6 11.Bf1 c6 12.Bg2 Bd6 13.e4 e5 14.Be3 exd4 15.Qxd4 Bc5 16.Qd2
Ne5 17.Bxc5 Nd3+ 18.Ke2 Nxc5 19.Qe3 Qb6 20.Rab1 Nfd7 21.Rhd1 Ne6 22.f4 g5 23.
fxg5 Qxe3+ 24.Kxe3 Nxg5 25.Ne2 Ne5 26.Nf4 Ke7 27.Rd4 Rad8 28.Rbd1 Rxd4 29.Rxd4
f6 30.Rd1 Ngf7 31.b3 a5 32.Nh5 g6 33.Nf4 b6 34.Nd3 Rd8 35.Nb2 Rxd1 36.Nxd1 b5
37.Nc3 Ng5 38.Bf1 Kd7 39.a4 b4 40.Nb1 Ngf3 41.Nd2 Nxd2 42.Kxd2 c5 43.Ke3 Ke6
44.Bd3 g5 45.Bb5 Kd6 46.Bd3 Ke6 47.Bb5 Kd6 48.Bd3 Kc7 49.Bb5 Kd8 50.Bd3 Ke7 51.
Be2 Kd7 52.Bb5+ Ke6 53.Be2 Kd7 54.Bb5+ Ke6 55.Be2 Ke7 56.Bb5 Kf7 57.Bd3 Ke7 58.
Bb5 Kf7 59.Bd3 Kf8 60.Bb5 Ke7 61.Be2 Ng6 62.Ba6 Kd8 63.Bf1 Ne5 64.Be2 Kc8 65.
Bd3 Ng6 66.Kf3 Kb8 67.Ba6 Kc7 68.Bb5 Kb7 69.Ke3 Kc8 70.Bc4 Kd8 71.Bb5 Ne5 72.
Bf1 Kc7 73.Bb5 Kb7 74.Bd3 Ng6 75.Bb5 Kc7 76.Kf3 Kb8 77.Kf2 Ne5 78.Ke1 Nf3+ 79.
Kd1 Kc7 80.Be2 Ne5 81.Kd2 Kb7 82.Bb5 Ka7 83.Bd3 Kb7 84.Ke3 Kb6 85.Kd2 Kc7 86.
Be2 Ng6 87.Ke3 Kb6 88.Kd2 Kb7 89.Bc4 Ne5 90.Bb5 Kb6 91.Bd3 Ng6 92.Be2 Nf4 93.
Bf1 c4 94.Bxc4 Nxh3 95.Ke3 Kc6 96.Kd4 Kd6 97.Ba6 Nf4 98.Kc4 Kc6 99.Bb5+ Kc7
100.Ba6 Kb6 101.Bb5 Ng6 102.Kd5 Ne5 103.Be2 Kc7 104.Ke6 Nd7 105.Ke7 Nc5 106.
Kxf6 Nxe4+ 107.Ke5 Nd2 108.Bd1 Nf1 109.Kf6 Ne3 110.Be2 Kd6 111.Kxg5 Ke5 112.Kg6
Nc2 113.g5 Nd4 114.Bc4 Nf3 115.Kh6 Nh4 116.Kh7 Nf5 117.Bd3 Nd6 118.g6 Ne8 119.
g7 Nxg7 120.Kxg7 Kd4 121.Bc4 Ke5 122.Kf7 Kd6 123.Kf6 Kd7 124.Ke5 Kc6 125.Bb5+
Kb6 126.Kd5 Kc7 127.Kc5 Kb7 128.Kd6 Kb6 129.Bc6 Ka6 130.Kc5 Ka7 131.Kb5 Kb8
132.Kxa5 Kc7 133.Kb5 Kd6 134.a5 Kc7 135.a6 Kd6 136.a7 Ke5 137.a8=Q Kf4 138.Qf8+
1-0
There are probably two issues here.

1. Evaluation. Crafty finds c4 almost instantly, with a score near zero. It eventually reaches scores that are very good for black. In the case of Crafty, I suspect it is the evaluation of a protected passed pawn vs a simple passed pawn, which is what c4 leads to where black has a protected passed pawn.

2. Search. It is hard to change the PV for very small scores, thanks to LMR, null-move, etc. Reductions and/or forward-pruning lead to issues where it is difficult to change the PV, particularly when move ordering might lead to a critical move being searched late in the list, which makes it subject to reduction or forward pruning errors.
Top
mikbac

Re: Pathetic lack of execution (can your engine find c4?)

Post by mikbac »

Thanks for the interesting games! :)

Chepla is an engine with very little knowledge, and it didn't have a clue about this game. Already at move 25 Gaviota had nice outposts, which the opponent underevaluated.

Chepla's static evaluation of this position is +0.03. It thinks the bishops 'activity' is better than the knight outpost.

Searching the position, it sniffs c4 at depth 16 in less than a second, but doesn't really get it until depth 22.

13 +0.00 48.... Ke6 49.Bf1 Ng6 50.Bc4+ Ke5 51.Bb5 (0.09)
14 +0.00 48.... Ke6 49.Bf1 Ng6 50.Bc4+ Ke5 51.Bd3 Nf4 52.Bf1 (0.12)
15 +0.00 48.... Ke6 49.Bf1 Ng6 50.Bc4+ Ke5 51.Ba6 (0.15)
16 +0.00 48.... Ke6 49.Bf1 Ng6 50.Kf3 Ne5+ 51.Ke3 (0.21)
16 -0.34 48.... c4 49.Bxc4 Nxc4+ 50.bxc4 b3 51.Kd3 b2 52.Kc2 (0.27)
17 -0.30 48.... c4 49.Bxc4 Nxc4+ 50.bxc4 b3 51.Kd3 b2 52.Kc2 (0.33)
18 -0.06 48.... c4 49.Bxc4 Nxc4+ 50.bxc4 b3 51.Kd3 b2 52.Kc2 (0.43)
19 -0.12 48.... c4 49.Bxc4 Nxc4+ 50.bxc4 b3 51.Kd3 b2 52.Kc2 (0.70)
20 -0.12 48.... c4 49.Bxc4 Nxc4+ 50.bxc4 b3 51.Kd3 b2 52.Kc2 (0.94)
21 -0.06 48.... c4 49.Bxc4 Nxc4+ 50.bxc4 b3 51.Kd3 b2 52.Kc2 (1.37)
22 -0.71 48.... c4 49.Bxc4 Nxc4+ 50.bxc4 b3 51.Kd3 b2 52.Kc2 (2.41)
23 -0.68 48.... c4 49.Bxc4 Nxc4+ 50.bxc4 b3 51.Kd3 b2 52.Kc2 (3.64)
24 -0.71 48.... c4 49.Bxc4 Nxc4+ 50.bxc4 b3 51.Kd3 b2 52.Kc2 (5.71)
25 -1.00 48.... c4 49.Bxc4 Nxc4+ 50.bxc4 b3 51.Kd3 b2 52.Kc2 (10.06)
26 -1.32 48.... c4 49.Bxc4 Nxc4+ 50.bxc4 b3 51.Kd3 b2 52.Kc2 (17.55)
27 -1.00 48.... c4 49.Bxc4 Nxc4+ 50.bxc4 b3 51.Kd3 b2 52.Kc2 (30.61)
28 -1.32 48.... c4 49.Bxc4 Nxc4+ 50.bxc4 b3 51.Kd3 b2 52.Kc2 (58.94)
Top

Return to “Computer Chess Club: General Topics”