Author: Steven J. Brann
Date: 11:23:38 07/27/03
Go up one level in this thread
On July 27, 2003 at 11:05:08, Peter Berger wrote:
>[D]8/5KBB/p4b2/1pp1kb2/8/1P6/1P5P/8 b - - 0 1
>
>That's Em. Lasker - Tarrasch, St. Petersburg 1914
>
>The position is won easily with 1...Be6+ 2. Kg6 Bxg7 3. Kxg7 Bxb3 4. h4 Bd1 -+
>
>But not with 1...Bxg7? 2. Bxf5 =+
>
>The pawn endgame is drawn: 2. ...Kxf5?! 3. Kg7 a5 4. h4 Kg4 5. Kg6! ( and not 5.
>Kf6? c4 6. bc bc 7. Ke5 c3 8. bc a4 9. Kd4 a3 -+, Tarrasch's idea) Kh4 6. Kf5
>Kg3 7. Ke4 Kf2 8. Kd5 Ke3 9. Kc5 Kd3 10. Kb5 Kc2 11. Ka5 Kb3 1/2-1/2
>
>The bishop's ending after 2. Bxf5 is extremely drawish because of the bishops of
>opposite colours.
>
>I only tried Yace so far that had a very hard time with this position
>
>852631702 14:51.1 0.45 20. 1...Bxg7 2.Bxf5 Bh6 3.Bc8 a5 4.Ba6 b4 5.Kg6 Bc1
> 6.h4 Bxb2 7.h5 Kd4 8.h6 Kc3 9.Bc4 Kd2 10.Kf5
> Ke3 11.h7H Bh8H {80}
>
>How do other engines do? Please give them some time to see if they really keep
>Be6+ .
>
>Peter
CM9000 with custom personality and SS=12 locks on to 1...Be6+ in 13 seconds and
stays with it over time with the winning line and increasing score.
Time Depth Score Positions Moves
0:00 1/3 -1.09 300 1...Be6+ 2.Kg6 Bxg7 3.Kxg7 Bxb3
4.h4
0:00 1/4 -1.09 768 1...Be6+ 2.Kg6 Bxg7 3.Kxg7 Bxb3
4.h4
0:00 1/5 -0.98 2113 1...Be6+ 2.Kg6 Bxg7 3.Kxg7 Bxb3
4.h4 Bd1 5.Bg6
0:00 1/6 -0.98 5013 1...Be6+ 2.Kg6 Bxg7 3.Kxg7 Bxb3
4.h4 Bd1 5.Bg6
0:00 1/7 -0.69 10060 1...Be6+ 2.Kg6 Bxg7 3.Kxg7 Bxb3
4.h4 Bd1 5.Bg6 Bf3 6.h5
0:00 1/7 -1.71 12269 1...Bxg7 2.Kxg7 Bxh7 3.Kxh7 Kf5
4.Kg7 Kg4 5.Kf6 Kh3 6.b4 cxb4
0:00 1/8 -1.71 16290 1...Bxg7 2.Kxg7 Bxh7 3.Kxh7 Kf5
4.Kg7 Kg4 5.Kf6 Kh3 6.b4 cxb4
0:00 1/9 -1.59 35701 1...Bxg7 2.Bxf5 Kxf5 3.Kxg7 a5
4.Kf7 c4 5.Kg7 cxb3 6.h4 Kg4
0:00 2/10 -2.00 61339 1...Bxg7 2.Bxf5 Kxf5 3.Kxg7 a5
4.Kf7 c4 5.Ke7 cxb3 6.Kd6 Ke4 7.h4
0:00 3/11 -1.81 86075 1...Bxg7 2.Bxf5 Kxf5 3.Kxg7 a5
4.h3 c4 5.Kh6 cxb3 6.h4 a4 7.h5 a3
0:00 4/12 -1.43 203429 1...Bxg7 2.Kxg7 Bxh7 3.Kxh7 Kf5
4.Kh6 Kg4 5.Kg6 Kh3 6.Kf6 Kxh2
7.Ke6 c4 8.bxc4 bxc4 9.Kd5
0:00 5/13 -0.64 439092 1...Bxg7 2.Bxf5 Kxf5 3.Kxg7 a5
4.h4 Kg4 5.Kf6 Kxh4 6.Ke6 Kg4 7.Kd5
b4 8.Kxc5 Kf5 9.Kd5
0:01 6/14 -0.64 849872 1...Bxg7 2.Bxf5 Kxf5 3.Kxg7 a5
4.h4 Kg4 5.Kf6 Kxh4 6.Ke6 Kg4 7.Kd5
b4 8.Kxc5 Kf5 9.Kd5
0:03 7/15 -0.52 1890948 1...Bxg7 2.Bxf5 Kxf5 3.Kxg7 a5
4.h4 Kg4 5.Kf6 c4 6.bxc4 bxc4 7.h5
Kxh5 8.Ke5 Kg4 9.Kd5 Kf5 10.Kxc4
Ke5
0:09 8/16 -0.48 4544875 1...Bxg7 2.Bxf5 Kxf5 3.Kxg7 a5
4.h4 Kg4 5.Kf6 c4 6.bxc4 bxc4 7.h5
Kxh5 8.Ke5 Kg4 9.Kd5 Kf5 10.Kd4
a4 11.Kxc4
0:13 8/16 -0.54 6680495 1...Be6+ 2.Kg6 Bxg7 3.Kxg7 Kf4
4.Bc2 Kg5 5.Kf8 Kf6 6.h4 Bg4 7.Kg8
Bf5 8.Bd1 Kg6 9.h5+ Kh6 10.Kf7
a5 11.Kf6
0:25 9/17 -1.04 12882880 1...Be6+ 2.Kg6 Bxg7 3.Kxg7 Bxb3
4.h4 c4 5.h5 b4 6.Bg8 Kd4 7.h6
Bc2 8.h7 Bxh7 9.Bxh7 c3 10.bxc3+
Kxc3 11.Kf6 a5 12.Ke5
0:44 10/18 -0.84 22533842 1...Be6+ 2.Kg6 Bxg7 3.Kxg7 Bxb3
4.h4 c4 5.h5 b4 6.Bg6 c3 7.bxc3
bxc3 8.h6 c2 9.h7 c1=Q 10.h8=Q
Bc4 11.Qd8 Kf4 12.Qf6+ Kg3 13.Qe5+
Kg2
1:25 11/19 -0.78 44531266 1...Be6+ 2.Kg6 Bxg7 3.Kxg7 Bxb3
4.h4 c4 5.h5 b4 6.Bg6 c3 7.bxc3
bxc3 8.h6 c2 9.h7 c1=Q 10.h8=Q
Bc4 11.Qd8 Kf4 12.Qd4+ Kg3 13.Kf6
Kg2 14.Bf5
3:12 12/20 -1.06 92753088 1...Be6+ 2.Kg6 Bxg7 3.Kxg7 Bxb3
4.h4 Bd1 5.Bg6 c4 6.h5 Bxh5 7.Bxh5
b4 8.Bg6 Kd4 9.Kf6 c3 10.bxc3+
Kxc3 11.Ke5 a5 12.Bb1 b3 13.Ke4 a4
5:52 13/21 -1.20 169352795 1...Be6+ 2.Kg6 Bxg7 3.Kxg7 Bxb3
4.h4 Bd1 5.Bg6 c4 6.h5 Bxh5 7.Bxh5
b4 8.Be8 b3 9.Kh6 Kd4 10.Kg5 c3
11.bxc3+ Kxc3 12.Kf4 a5 13.Ke3
b2 14.Bg6
14:52 14/22 -1.89 391542666 1...Be6+ 2.Kg6 Bxg7 3.Kxg7 Bxb3
4.h4 Bd1 5.Bg6 Kd4 6.Kf6 Kc4 7.Bf7+
Kb4 8.Ba2 c4 9.Kg5 c3 10.bxc3+
Kxc3 11.h5 b4 12.h6 Bc2 13.Bg8
a5 14.h7 Bxh7 15.Bxh7
Steve
This page took 0 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.