Author: John Merlino
Date: 11:53:12 05/24/04
Go up one level in this thread
On May 24, 2004 at 14:11:09, Mikael Bäckman wrote:
>On May 24, 2004 at 13:30:29, John Merlino wrote:
>
>>On May 24, 2004 at 10:20:39, Andrew Wagner wrote:
>>
>>>The position is: [d]8/2b5/p1k3p1/4p2p/2P1P2P/2B1K1P1/8/8 b - -
>>>
>>>Would your engine be able to hold a draw against a "beginner" chess engine? Be
>>>sure you avoid the terrible a5?? This is an easy one, folks...
>>>
>>>
>>>Full game:
>>>
>>>[Event "ICC 60 30"]
>>>[Site "Internet Chess Club"]
>>>[Date "2004.05.23"]
>>>[Round "-"]
>>>[White "DIEP"]
>>>[Black "crafty"]
>>>[Result "0-1"]
>>>[ICCResult "White resigns"]
>>>[WhiteElo "2540"]
>>>[BlackElo "2740"]
>>>[Opening "English: Neo-Catalan declined"]
>>>[ECO "A05"]
>>>[NIC "RE.09"]
>>>[Time "17:54:13"]
>>>[TimeControl "3600+30"]
>>>
>>> 1.Nf3 Nf6 2.g3 d5 3.Bg2 e6 4.O-O Be7 5.c4 O-O 6.b3 c5 7.e3 Nc6 8.Bb2 b6
>>>9.Nc3 Bb7 10.cxd5 Nxd5 11.Nxd5 Qxd5 12.d4 Rad8 13.Ne5 Qd6 14.Nxc6 Bxc6 15.Qg4
>>>cxd4 16.Bxd4 g6 17.Bxc6 Qxc6 18.Rac1 Qb7 19.Qf4 Rd6 20.Bb2 Rfd8 21.h4 Qa6 22.a4
>>>Qe2 23.Bd4 f6 24.Rfe1 Qa2 25.Rc7 e5 26.Qe4 R6d7 27.Rxd7 Rxd7 28.Qc6 Rd8 29.Qe6+
>>>Kf8 30.Bc3 Qc2 31.Qc4 a6 32.Re2 Qd3 33.Rd2 Qxc4 34.Rxd8+ Bxd8 35.bxc4 Ke7 36.e4
>>>h5 37.Kf1 Kd6 38.Ke2 Kc5 39.Kd3 Bc7 40.f3 f5 41.Bd2 fxe4+ 42.fxe4 Bd6 43.Bc3 Bc7
>>>44.Be1 Bd8 45.Bd2 Kc6 46.Bc3 Bc7 47.Kc2 Kd7 48.Kd2 Bd6 49.a5 bxa5 50.Bxa5 Bc5
>>>51.Ke2 Bd4 52.Kf3 Kc6 53.Bb4 Bb6 54.Bc3 Bc7 55.Ke3 {diagram above} a5 56.Kd3 a4
>>>57.Bb2 Bd6 58.Kc2 Kd7 59.c5 Bxc5 60.Bxe5 Ke6 61.Bf4 Bd4 62.Kc1 Ke7 63.Kc2 Ke6
>>>64.Kc1 Kd7 65.Kb1 Kc6 66.Ka2 Bg7 67.Ka3 Kc5 68.Kxa4 Kd4 69.Bg5 Kxe4 70.Kb3 Be5
>>>71.Kc2 Bxg3 72.Kd1 Kf3 73.Bf6 Kg4 74.Ke2 Bxh4 75.Bd4 Kh3 76.Kf1 g5 77.Be5 g4
>>>{White resigns} 0-1
>>
>>Confused. You say to avoid a5 and "hold the draw", but in the actual game Black
>>played a5 and won.
>>
>>jm
>
>
>I think Andrew put the wrong 'a5 diagram' here. One should try to avoid 49. a5
>
>/Mikael
Ok, that makes more sense. Here's the position:
[D]8/3k4/pp1b2p1/4p2p/P1P1P2P/2B3P1/3K4/8 w - - 0 49
CM_SKR on an AMD 2500 avoids a5 in less than one second:
Time Depth Score Positions Moves
0:00 1/4 0.00 611 49.Kc1
0:00 1/3 0.00 262 49.Bd4 Bb4+
0:00 1/3 -0.01 569 49.Ba5 Bc5 50.Bc3 Ke6
0:00 1/3 0.03 619 49.a5 bxa5 50.Bxa5 Kc6 51.Kd3
0:00 1/4 0.00 1238 49.a5 bxa5 50.Bxa5 Bc5 51.Bc3 Ke6
0:00 1/5 0.05 2951 49.a5 bxa5 50.Bxa5 Bc5 51.Bc3 Bd4
52.Kd3 Bxc3 53.Kxc3
0:00 1/6 0.05 6099 49.a5 bxa5 50.Bxa5 Bc5 51.Bc3 Bd4
52.Kd3 Bxc3 53.Kxc3
0:00 1/7 0.01 10933 49.a5 bxa5 50.Bxa5 Bc7 51.Bc3 a5
52.Kd3 a4
0:00 1/8 -0.12 19959 49.a5 bxa5 50.Bxa5 Bc7 51.Bc3 a5
52.Kd3 a4 53.Bb2 Bd6
0:00 1/8 0.00 24618 49.Kd3 Bc7 50.Kd2
0:00 2/9 -0.10 67025 49.Kd3 Ke6 50.Ke2 a5 51.Bd2 Bb4
52.Be3 Bc5 53.Kd3 Bxe3 54.Kxe3
0:00 2/9 -0.05 82973 49.Ke3 Ke6 50.Kf3 a5 51.Bd2 Bb4
52.Be3 Bc5 53.Bxc5 bxc5
0:00 3/10 -0.03 154066 49.Ke3 a5 50.Kf3 Ke6 51.Bd2 Bc5
52.g4 Bd4 53.Bg5 hxg4+ 54.Kxg4
0:00 4/11 -0.04 273163 49.Ke3 a5 50.Kf3 Ke6 51.Bd2 Bc5
52.g4 Bd4 53.Bg5 Kd6 54.Bf6 hxg4+
55.Kxg4
0:01 5/12 -0.09 577242 49.Ke3 Bc5+ 50.Kf3 Bd4 51.Bb4 Kc6
52.g4 hxg4+ 53.Kxg4 Be3 54.Bc3
Kd6 55.Kf3 Bd4
0:02 5/12 -0.04 703006 49.Ke2 a5 50.Kf3 Ke6 51.Bd2 Bc5
52.g4 Bd4 53.Bg5 Kd6 54.Bf6 hxg4+
55.Kxg4
0:03 6/13 -0.02 1032667 49.Ke2 a5 50.Kf3 Ke6 51.Bd2 Bc5
52.g4 Bd4 53.Bh6 Kd6 54.Bf8+ Kd7
55.Bg7 hxg4+ 56.Kxg4 Ke6
0:06 7/14 -0.05 2276777 49.Ke2 Ke6 50.a5 Bc7 51.axb6 Bxb6
52.Bb4 a5 53.c5 Bc7 54.Ba3 Kd7
55.Kd3 Kc6 56.Kc4 a4
0:12 8/15 -0.05 4127374 49.Ke2 Ke6 50.a5 Bc7 51.axb6 Bxb6
52.Bb4 a5 53.c5 Bc7 54.Ba3 Kd7
55.Kd3 Kc6 56.Kc4 a4
0:25 9/16 -0.01 8819471 49.Ke2 Ke6 50.Kf3 Be7 51.Bd2 Bc5
52.a5 Kd6 53.axb6 Bxb6 54.Bb4+
Bc5 55.Bc3 Bd4 56.Bb4+ Kc6 57.g4
Bc5 58.Bc3 hxg4+ 59.Kxg4
0:46 10/17 -0.13 16759259 49.Ke2 Ke6 50.Kf3 Bc5 51.a5 bxa5
52.Bxa5 Kd6 53.g4 Bd4 54.Bb4+ Kc6
55.gxh5 gxh5 56.Ke2 Kb6 57.Kd3
a5 58.Bd6 a4
jm
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