Author: Dieter Buerssner
Date: 13:54:51 05/24/03
Go up one level in this thread
On May 24, 2003 at 09:03:54, Andrew Williams wrote:
>Hi,
>
>PM lost a game against Deep Sjeng on ICC yesterday. For a long time PM
>thought it was going to win, but it underestimated DS's attack on its
>e-pawn. I think the turning point was here:
>
>5k2/5p2/1p2p3/p1n5/P1Q5/4RNPP/5PK1/3q3r b - - 0 39 am Nxa4
>
>What do your programs think about this position? Do they ever consider Nxa4?
>How do they evaluate the position? As always, I'm especially interested in
>amateur programs' analyses.
Yace gets a fail low to draw score for Nxa4 at depth 8. P4, 2.53 GHz:
606184 0.755 0.97 7. 39...Nxa4 40.Re4 Nc5 41.Rd4 Qa1 42.Rd8+ Ke7
43.Qh4+ f6 44.Qh8 {80}
1876788 2.314 0.57 8-- 39...Nxa4 40.Ng5 Nc5 41.Qf4 Qf1+ 42.Kf3 Rxh3
43.Nxh3 Kg7 {-340}
2330294 2.947 0.00 8t 39...Nxa4 40.Ng5 Nc5 41.Qf4 Qf1+ 42.Kf3 Qd1+
43.Kg2 {80}
3226057 4.067 0.01 8t+ 39...Ke8 40.Ra3
4066175 5.172 0.00 8t- 39...Ke8 40.Rc3 Ke7 41.Rc2 f5 42.Rd2 Ke8
4066175 5.172 0.00 8t 39...Nxa4 40.Ng5 Nc5 41.Qf4 Qf1+ 42.Kf3 Qd1+
43.Kg2 {80}
6523097 8.278 0.01 8t+ 39...Qc1 40.Qxc1 Rxc1 41.Ne5 Nxa4 42.Ra3 Nc5H
43.Kf3H {HT} {80}
6634728 8.426 0.07 8t 39...Qc1 40.Rc3 Qb1 41.Qe2 Ke8 42.Qc4 f6 43.Rc2
{0}
7578530 9.566 0.08 8t+ 39...Qb1 40.Ra3
8624092 10.941 0.23 8t 39...Qb1 40.Ra3 Rd1 41.Qh4 Qb4 42.Qh8+ Ke7
43.Qh4+ f6 44.Qh7+ Kf8 45.Qh8+ Kf7 46.Qh7+H
Ke8H 47.Qh8+H Kf7H 48.Qh7+H Ke8H 49.Qh8+H Kf7HR
{0}
9107959 11.549 0.24 8t+ 39...Qa1 40.Ne5 Qg1+ 41.Kf3 Rxh3 42.Nxf7 Kxf7
43.Rxe6 Nxe6 44.Qc8 {760}
9976242 12.697 0.64 8t 39...Qa1 40.Ng5 Qg1+ 41.Kf3 Rh2 42.Qc2 Qg2+
43.Kg4 Qxf2 44.Qxf2 Rxf2 {80}
9991681 12.715 0.64 8. 39...Qa1 40.Ng5 Qg1+ 41.Kf3 Rh2 42.Qc2 Qg2+
43.Kg4 Qxf2 44.Qxf2 Rxf2 {80}
14699430 18.759 0.86 9t 39...Qa1 40.Ne5 Qg1+ 41.Kf3 Rh2 42.Re2 Qd1
43.Qf4 Qd5+ 44.Kg4 f5+ 45.Kg5H Qd8+H 46.Kg6H
Qe8+H 47.Kf6H Qe7+H 48.Kg6H {0}
18165029 22.844 0.86 9. 39...Qa1 40.Ne5 Qg1+ 41.Kf3 Rh2 42.Re2 Qd1
43.Qf4 Qd5+ 44.Kg4 f5+ 45.Kg5 Qd8+ 46.Kg6 Qe8+
47.Kf6 Qe7+ 48.Kg6 {0}
35324355 45.557 0.54 10t 39...Qa1 40.h4 Rb1 41.Ng5 Rg1+ 42.Kh2 Rh1+
43.Kg2 Qg1+ 44.Kf3 Rh2 45.Qc2 Qa1 46.Rc3 Nxa4
47.Rc7 {80}
52668328 1:07.1 0.54 10. 39...Qa1 40.h4 Rb1 41.Ng5 Rg1+ 42.Kh2 Rh1+
43.Kg2 Qg1+ 44.Kf3 Rh2 45.Qc2 Qa1 46.Rc3 Nxa4
47.Rc7 {80}
89652839 1:55.4 0.56 11t 39...Qa1 40.h4 Rb1 41.Ng5 Rg1+ 42.Kh2 Rh1+
43.Kg2 Qg1+ 44.Kf3 Rh2 45.Qc2 Qg2+ 46.Kg4 Qxf2
47.Qxf2 Rxf2 48.Ne4 Nxe4 49.Rxe4 {80}
135980364 2:55.9 0.56 11. 39...Qa1 40.h4 Rb1 41.Ng5 Rg1+ 42.Kh2 Rh1+
43.Kg2 Qg1+ 44.Kf3 Rh2 45.Qc2 Qg2+ 46.Kg4 Qxf2
47.Qxf2 Rxf2 48.Ne4 Nxe4 49.Rxe4 {80}
305719667 6:42.0 0.42 12t 39...Qa1 40.h4 Rb1 41.Qf4 Qxa4 42.Qd6+ Kg7
43.Qe5+ f6 44.Qc7+ Qd7 45.Qxd7+ Nxd7 46.Rxe6
Rd1 47.Re7+ Kf8 48.Re1 Rxe1 {500}
461474576 10:03.7 0.42 12. 39...Qa1 40.h4 Rb1 41.Qf4 Qxa4 42.Qd6+ Kg7
43.Qe5+ f6 44.Qc7+ Qd7 45.Qxd7+ Nxd7 46.Rxe6
Rd1 47.Re7+ Kf8 48.Re1 Rxe1 {500}
Regards,
Dieter
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.