Author: scott farrell
Date: 19:15:00 04/08/04
This position arose on ICC Goona vs Chompsterx
here white has an attack coming, with a bishop sac on g6, and black's pieces are
woefully out of position to defend. While white can poure more pieces in.
The obvious move is g6, but chompster and crafty see black is still winning
until some depth, where they realise white is winning.
I had cm9000 look at it for a few minutes on a PIII850 and it still says g6, but
says white is winning by the smallest of margins.
As far as I can see its lost for black.
I am interested in what other engines think.
[d]r4rk1/p2b1ppp/1qn2P2/3pP3/2pP4/b1P1BN1P/P1B2Q2/R4NK1 b - - 0 23
as you can see below crafty takes about 12 plies to see its in trouble, and 14
plies and overnight to see ne7.
I am unsure if ne7 is a better move
Chompster starts to see the problem at ply 10, and ne7 at ply 10 or 11
(depending on luck I think, m/o et al.)
d10/18(0) 0/48 -1.01 112.514secs 35233297 G6 QH4 H5 QG5 NxE5 NxN RD8 NxF7
KxN BxG6+ KF8
d10/28(0) 28/48 -0.94 167.709secs 53207684 NE7 NG5 G6 RB1 QA6 QG2 BC6 PxN
BxE7 A4 QC8
chompster probably gets it for speculative KS reasons. But its interesting
becuase humans can see an the attack much more quickly, and gooner(warmware)
finds it at 3 0 blitz !!!
crafty is on a dual pIII 1.26, 192mb hash, I think v19.3
6-> 0.18 -1.40 1. ... g6 2. Qh4 Bb2 3. Rb1 Rab8 4.
Bh6 (s=5)
7 0.24 -1.50 1. ... g6 2. Qh4 Qc7 3. Ng5 h5 4. Bc1
Bxc1 5. Rxc1 (s=4)
7-> 0.39 -1.50 1. ... g6 2. Qh4 Qc7 3. Ng5 h5 4. Bc1
Bxc1 5. Rxc1
8 0.65 -1.48 1. ... g6 2. Qh4 h5 3. Rb1 Qc7 4. Bh6
Rfb8 5. Re1
8-> 1.19 -1.48 1. ... g6 2. Qh4 h5 3. Rb1 Qc7 4. Bh6
Rfb8 5. Re1
9 1.73 -- 1. ... g6
9 2.12 -1.07 1. ... g6 2. Qh4 h5 3. Qg5 Nd8 4. Bxg6
Ne6 5. Qxh5 fxg6 6. Qxg6+
9-> 4.60 -1.07 1. ... g6 2. Qh4 h5 3. Qg5 Nd8 4. Bxg6
Ne6 5. Qxh5 fxg6 6. Qxg6+ (s=5)
10 5.59 -0.73 1. ... g6 2. Qh4 h5 3. Qg5 Nd8 4. Bxg6
Ne6 5. Qxh5 fxg6 6. Qxg6+ Kh8 (s=4)
10-> 16.66 -0.73 1. ... g6 2. Qh4 h5 3. Qg5 Nd8 4. Bxg6
Ne6 5. Qxh5 fxg6 6. Qxg6+ Kh8 (s=10)
11 20.10 -0.59 1. ... g6 2. Qh4 Rfb8 3. Ng5 h5 4.
e6 Bxe6 5. Nxe6 Qb2 6. Rc1 fxe6 7.
12 48.93 -- 1. ... g6
12 57.50 0.48 1. ... g6 2. Qh4 Rfb8 3. Ng5 h5 4.
e6 Bxe6 5. Nxe6 Qb2 6. Rc1 fxe6 7.
Bxg6 Qxa2 (s=8)
12 48.93 -- 1. ... g6
12 57.50 0.48 1. ... g6 2. Qh4 Rfb8 3. Ng5 h5 4.
Nxf7 Qb2 5. Nh6+ Kh8 6. Rc1 Qxc3 7.
Nf7+ Kg8 8. Nh6+ Kf8 (s=7)
12-> 10:17 0.48 1. ... g6 2. Qh4 Rfb8 3. Ng5 h5 4.
Nxf7 Qb2 5. Nh6+ Kh8 6. Rc1 Qxc3 7.
Nf7+ Kg8 8. Nh6+ Kf8 (s=16)
13 11:03 0.22 1. ... g6 2. Qh4 Rfb8 3. Bxg6 fxg6
4. f7+ Kxf7 5. Qxh7+ Ke8 6. Qg8+ Bf8
7. Bh6 Bxh3 8. Qxf8+ Kd7 9. Qd6+ Kc8
10. Qxd5 Qb5 (s=15)
13-> 19:24 0.22 1. ... g6 2. Qh4 Rfb8 3. Bxg6 fxg6
4. f7+ Kxf7 5. Qxh7+ Ke8 6. Qg8+ Bf8
7. Bh6 Bxh3 8. Qxf8+ Kd7 9. Qd6+ Kc8
10. Qxd5 Qb5 (s=8)
14 20:20 -- 1. ... g6
14 23:08 1.77 1. ... g6 2. Qh4 Rfb8 3. Ng5 h5 4.
Nxf7 Kxf7 5. Bxg6+ Kxg6 6. Qg5+ Kf7
7. Qxh5+ Ke6 8. Qg4+ Kf7 9. Qxd7+ Ne7
10. fxe7 Qg6+ 11. Kh2 Rb2+ 12. Nd2
Bxe7 13. Qxd5+ (s=7)
14 408:35 1.15 1. ... Ne7 2. Bc1 Bxc1 3. fxe7 Rfe8
4. Rxc1 Qh6 5. Ne3 Bxh3 6. Rb1 Be6
7. Rb7 Qf4 8. a3
14-> 412:24 1.15 1. ... Ne7 2. Bc1 Bxc1 3. fxe7 Rfe8
4. Rxc1 Qh6 5. Ne3 Bxh3 6. Rb1 Be6
7. Rb7 Qf4 8. a3 (s=10)
15 457:01 1.22 1. ... Ne7 2. Ng5 h6 3. Nh7 Ng6 4.
Nxf8 Bxf8 5. Bxg6 fxg6 6. f7+ Kh8 7.
h4 Qe6 8. Rb1 Bc6 9. Ng3 (s=9)
15-> 666:08 1.22 1. ... Ne7 2. Ng5 h6 3. Nh7 Ng6 4.
Nxf8 Bxf8 5. Bxg6 fxg6 6. f7+ Kh8 7.
h4 Qe6 8. Rb1 Bc6 9. Ng3 (s=5)
16 697:00 1/48? 1. ... Ne7
Scott
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.