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Subject: Re: Two Test Positions = Queen and Pawn Endings

Author: Bryan Hofmann

Date: 15:14:00 04/30/04

Go up one level in this thread


On April 30, 2004 at 17:21:34, José Antônio Fabiano Mendes wrote:

> [D]7k/6p1/2P3Qp/p3q2P/8/6P1/5K2/8 w
> Bogoljubow vs Stahlberg, Kemeri 1933  1. Qc2!! Qxh5 2. Qc4!

Tao just does not see giving up the H file pawn as a good solution.

Tao57-Beta
 1   00:00  0.44   Kg2
 1   00:00  0.61   Kf3
 2   00:00  0.46   Kf3 a4
 3   00:00  0.43   Kf3 a4 g4
 4   00:00  0.33   Kf3 a4 Qe4 Qxh5+ Kg2
 4+  00:00  0.33   Kg2
 4   00:00  0.49   Kg2 Qd5+ Kh3 Qh1+ Kg4 Qd1+ Kf5 Qd8
 5   00:00  0.45   Kg2 Qd5+ Kh3 Qe5 Qg4 Qc7
 6   00:00  0.44   Kg2 Qd5+ Kh3 Qh1+ Kg4 Qd1+ Kf4 Qd4+ Qe4 Qf6+ Kg4 Qg5+ Kh3
Qxh5+ Kg2
 7   00:00  0.44   Kg2 Qe2+ Kh3 Qf1+ Kg4 Qc4+ Kf5 Qd5+ Kf4 Qd4+ Qe4 Qf6+ Kg4
Qg5+ Kf3 Qxh5+
 8   00:00  0.33   Kg2 Qe2+ Kh3 Qf1+ Kg4 Qc4+ Kf5 a4 Qe8+ Kh7 Qe4 Qa6
 9   00:01  0.34   Kg2 Qe2+ Kh3 Qf1+ Kg4 Qe2+ Kf4 a4 Qd6 Qc4+ Ke5 a3 Qxa3 Qxc6
Qf8+ Kh7
10   00:06  0.21   Kg2 a4 Qc2 Qd5+ Kf2 Qf7+ Ke3 Qc7 Ke4 a3 Qc4 Qxg3
11   00:11  0.18   Kg2 Qe2+ Kh3 a4 Qf5 Qc4 Qd7 Qe4 Kh2 Qe2+ Kg1 Qe1+ Kg2 Qe2+
Kh1 Qxh5+ Kg1
12   00:23  0.13   Kg2 Qe2+ Kh3 a4 Qf5 Qc4 Qf3 a3 Qf8+ Kh7 Qxa3 Qxc6 Qd3+ Kh8
Kh2
13   01:10  0.04   Kg2 Qe2+ Kh3 a4 Qf5 Qc4 Qf3 Qc5 c7 Qxc7 Qa8+ Kh7 Qxa4 Qc8+
Qg4 Qc2
13+  01:58  0.04   Qc2
14   03:56  0.03   Kg2 Qe2+ Kh3 a4 Qf7 Qd1 Qe8+ Kh7 Qe4+ Kh8 c7 Qd7+ g4 Qxc7
Qa8+ Kh7 Qxa4 Qc3+ Kg2 Qd3 Kf2
14+  04:41  0.03   Qc2
15   07:30  0.03   Kg2 Qe2+ Kh3 a4 Qf7 Qd1 Qe8+ Kh7 Qe4+ Kh8 c7 Qd7+ g4 Qxc7
Qe8+ Kh7 Qxa4 Qe5 Qc2+ Kh8 Qc1 Qd5 Qc3

>
> [D]8/8/p7/2Q5/1P6/1P3qp1/3k4/6K1 b
> Grigoriev 1930  1...Kd1!
> The immediate transposition into a pawn ending leads only to a draw.

Tao sees a mate in 22 I can't get it to print the whole PV from some reason.

Tao57-Beta  UCI 234 MB:
 1   00:00  0.81   Kd1
 1   00:00  1.07   Qe2
 1   00:00  1.08   Qc3
 1   00:00  1.20   Qd3
 1   00:00  1.58   Qxb3
 2   00:00  1.22   Qxb3 Kg2
 3   00:00  1.44   Qxb3 Qd6+ Qd3 Qf6
 4   00:00  1.28   Qxb3 Kg2 Qd3 Qe5
 5   00:00  1.00   Qxb3 Kg2 Qd3 Qe5 Qa3 Qxg3 Qxb4
 5+  00:00  1.00   Ke1
 5   00:00  1.06   Ke1 Qc1+ Ke2 Qc2+ Ke3 Qc1+ Ke4 Qc6+ Kf4 Qh6+ Kg4 Qxa6 Qxb3
 5+  00:00  1.06   Ke2
 5+  00:00  1.06   Kd1
 5   00:00  1.42   Kd1 Qa7 Kc2 b5 axb5 b4
 6   00:00  1.61   Kd1 b5 axb5 b4 Kd2 Qg5+ Qe3+ Qxe3+ Kxe3 Kg2
 7   00:01  1.30   Kd1 b5 axb5 b4 Kd2 Qc1+ Kd3 Qa3+ Ke2 Qb2+ Kd1
 8   00:01  1.75   Kd1 Qd4+ Kc2 Qb6 Kxb3 Qe6+ Kc3 Qe1+ Kd3 Qb1+ Kd4 Qa1+ Qc3
Qxc3+ Kxc3
 9   00:02  1.94   Kd1 Qd4+ Kc2 Qb6 Kb2 b5 Qf2+ Qxf2+ gxf2+ Kg2 axb5 b4 Kc3
10   00:05  23.27   Kd1 Qd4+ Kc2 Qb6 Kb2 Qf6+ Qxf6 Kg2 Qf2+ Kh3 Kxb3 Kg4 Kxb4
11   00:12  M22  Kd1 Qd4+ Kc2 b5 Qf2+ Qxf2+ gxf2+ Kxf2




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