Author: Dann Corbit
Date: 13:48:33 03/04/06
Go up one level in this thread
On March 04, 2006 at 16:30:09, Charles Roberson wrote:
>
>
> Telepath drew a won endgame in a blitz match this week. The position is:
> 8/8/8/5BB1/8/3p1kpp/7P/7K w - - 0 76
>
> It only searched 6 ply and played Bxh3.
> At 10 ply it played Bxd3.
>
> Seems to me the better move is Bxd3 or h2xg3.
> I've tried upping the outside passer value by 4x and adjusting
> the code to call the d3 pawn an outside passer. Now, it makes
> Bxd3 at 9 ply and h2xg3 at 10 ply then Bxd3 at 11 ply.
>
> Seems I should be able to adjust it to see this earlier or would
> that be overtuning?
Rybka likes Kg1 (which wins, but is a very puzzling choice because hxg3
obviously wins very easily.) Considering Rybka's long struggle to get off of
the drawing Bxd3 I would not be too worried about it if my program struggled
with it a while also. However, a 6 ply depth is a great concern if your program
has more than one second of think time. Why so shallow? Severe time pressure?
Analysis from e:\ttt.epd
3/4/2006 1:34:36 PM Level: 999 Seconds
Analyzing engine: Rybka v1.01 Preview 2.w32
1) 0 76
Avoid move:
Best move (Rybka v1.01 Preview 2.w32): Kh1-g1
Not found in: 16:39
3 00:00 5.744 74.453 +6.63 Bf5xd3
4 00:00 7.300 78.686 +6.95 Bf5xd3
5 00:00 8.974 82.787 +5.80 Bf5xd3 Kf3g4
6 00:00 11.816 109.005 +6.69 Bf5xd3 Kf3g4 Bg5c1
7 00:00 7.248 58.904 +6.69 Bf5xd3 Kf3g4 Bg5c1 g3g2+ Kh1g1 Kg4h5
8 00:00 19.898 107.807 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5
9 00:00 40.591 155.674 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5 Kh4h5
10 00:00 80.591 187.984 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5 Kh4h5 Bf5xh3
11 00:00 150.801 209.810 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5 Kh4h5 Bf5xh3 Kh5h4
12 00:01 265.335 225.666 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6
13 00:02 444.369 236.627 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5
14 00:03 712.987 244.507 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4
15 00:05 1.105.819 250.688 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4
16 00:06 1.662.474 255.113 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4
17 00:09 2.448.383 257.936 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4
18 00:14 3.549.358 258.999 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4
19 00:20 4.997.370 260.741 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4
20 00:27 6.939.724 260.618 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4
21 00:37 9.331.828 261.008 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4
22 00:50 12.634.594 261.032 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4
Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4
22 02:25 34.944.570 247.097 +16.60 Kh1g1 d3d2 Bg5xd2 Kf3e2 Bd2g5 Ke2f3
Bg5c1 g3g2 Bf5xh3 Kf3e2 Bh3xg2 Ke2d1 Bc1e3 Kd1c2
23 02:44 39.836.036 247.997 +16.66 Kh1g1 d3d2 Bg5xd2 Kf3e2 Bd2g5 Ke2f3
Bg5c1 g3g2 Bf5xh3 Kf3e2 Bh3xg2 Ke2d1 Bc1e3 Kd1c2
24 05:03 71.486.462 241.254 +M75 Kh1g1 d3d2 Bg5xd2 Kf3e2 Bd2g5 Ke2f3
Bg5c1 g3g2 Bf5xh3 Kf3e4 Bh3xg2+ Ke4f5 Bg2f3 Kf5g6
3/4/2006 1:43:36 PM, Time for this analysis: 00:08:56, Rated time: 16:39
0 of 1 matching moves
3/4/2006 1:43:36 PM, Total time: 12:08:59 AM
Rated time: 16:39 = 999 Seconds
This page took 0.01 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.