Author: Richard Pijl
Date: 00:58:05 11/24/04
Go up one level in this thread
On November 24, 2004 at 01:25:02, Nolan Denson wrote:
>Well it may not be a win for white but black being Tiger 2004 lost this game as
>black.
>
>[D]2R5/6k1/7p/5pp1/pq2p3/Q6P/5PPK/1r6 w - - 4 1
>
>What really is the best move !!!
The Baron 1.5.0 on a Xeon 2.8 has not problem finding out that Qg3 is best (9
seconds) and shows a positive score for it in less than a minute:
ply time nodes score pv
4(12)& 0:00.03 10421 -2.26 Rc8-c7 Kg7-g6 Rc7-c6 Kg6-f7 Qa3-e3
a4-a3
4(12). 0:00.05 12758 -2.26 Rc8-c7 Kg7-g6 Rc7-c6 Kg6-f7 Qa3-e3
a4-a3
5(14)& 0:00.09 26922 -2.32 Rc8-c7 Kg7-g6 Rc7-c6 Kg6-f7 Rc6-c7
Kf7-g8 Rc7-c8 Kg8-h7 Rc8-c7 Kh7-h8
(Rc7-c8)
5(14)& 0:00.13 37966 -2.01 Qa3-g3 f5-f4 Rc8-c7 Kg7-f8 Rc7-c8
Kf8-e7 Qg3-g4 (a4-a3)
5(14). 0:00.14 41446 -2.01 Qa3-g3 f5-f4 Rc8-c7 Kg7-f8 Rc7-c8
Kf8-e7 Qg3-g4 (a4-a3)
6(14)& 0:00.27 77779 -1.85 Qa3-g3 f5-f4 Rc8-c7 Kg7-f6 Rc7-c6
Kf6-f7 Rc6-c7 Kf7-g8 Qg3-g4
6(14). 0:00.31 97554 -1.85 Qa3-g3 f5-f4 Rc8-c7 Kg7-f6 Rc7-c6
Kf6-f7 Rc6-c7 Kf7-g8 Qg3-g4
7(16)& 0:00.55 170275 -1.85 Qa3-g3 f5-f4 Rc8-c7 Kg7-g6 Rc7-c6
Kg6-h7 Rc6-c7 Kh7-g8 Qg3-g4 a4-a3 (Qg4-c8)
7(16)& 0:01.58 493040 -1.30 Qa3-e3 Qb4-d6 g2-g3 Kg7-g6 Qe3-a7
f5-f4 Rc8-g8 Kg6-f6 Qa7-g7 Kf6-f5
7(16). 0:01.59 498327 -1.30 Qa3-e3 Qb4-d6 g2-g3 Kg7-g6 Qe3-a7
f5-f4 Rc8-g8 Kg6-f6 Qa7-g7 Kf6-f5
8(17)& 0:02.42 747635 -1.22 Qa3-e3 Qb4-d6 g2-g3 Rb1-b6 Qe3-c3
Qd6-f6 Qc3-c7 Kg7-g6 Rc8-g8 Kg6-h5 Qc7-h7
Rb6-b2
8(17). 0:04.05 1250613 -1.22 Qa3-e3 Qb4-d6 g2-g3 Rb1-b6 Qe3-c3
Qd6-f6 Qc3-c7 Kg7-g6 Rc8-g8 Kg6-h5 Qc7-h7
Rb6-b2
9(17)& 0:06.11 1895136 -0.90 Qa3-e3 Qb4-d6 g2-g3 Kg7-g6 Qe3-c3
Kg6-h5 Qc3-g7 Rb1-b6 Rc8-f8 Rb6-b5
9(18)+ 0:08.58 2693274 -0.61 Qa3-g3 (f5-f4) (Rc8-c7) (Kg7-g6) (Rc7-c6)
(Kg6-h7) (Qg3-g4) (Rb1-b2) (Rc6-c7)
(Kh7-g8) (Qg4-e6)
9(18)& 0:09.64 3007100 -0.39 Qa3-g3 f5-f4 Rc8-c7 Kg7-f6 Rc7-c6
Kf6-e5 Qg3-g4 Qb4-e7 Rc6xh6 Rb1-b2 Rh6-g6
(Rb2xf2) (Rg6xg5) (Ke5-d4)
9(18). 0:10.70 3351513 -0.39 Qa3-g3 f5-f4 Rc8-c7 Kg7-f6 Rc7-c6
Kf6-e5 Qg3-g4 Qb4-e7 Rc6xh6 Rb1-b2 Rh6-g6
(Rb2xf2) (Rg6xg5) (Ke5-d4)
10(19)& 0:13.14 4140968 -0.40 Qa3-g3 f5-f4 Rc8-c7 Kg7-f6 Rc7-c6
Kf6-e5 Qg3-g4 Qb4-e7 Rc6xh6 a4-a3 Rh6-g6
a3-a2 Rg6xg5 (Ke5-d4)
10(19). 0:15.20 4889516 -0.40 Qa3-g3 f5-f4 Rc8-c7 Kg7-f6 Rc7-c6
Kf6-e5 Qg3-g4 Qb4-e7 Rc6xh6 a4-a3 Rh6-g6
a3-a2 Rg6xg5 (Ke5-d4)
11(22)+ 0:26.00 8179438 -0.10 Qa3-g3 (f5-f4) (Rc8-c7) (Kg7-f6) (Qg3-g4)
(Qb4-d6) (Qg4-c8) (f4-f3) (g2-g3)
11(22)& 0:26.45 8317908 -0.20 Qa3-g3 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4
Qb4-d6 Qg4-c8 Rb1-b6 Qc8-h8 Kf6-f5 Rc7-f7
Kf5-g6 Qh8-h7
11(22). 0:38.67 12058930 -0.20 Qa3-g3 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4
Qb4-d6 Qg4-c8 Rb1-b6 Qc8-h8 Kf6-f5 Rc7-f7
Kf5-g6 Qh8-h7
12(23)& 0:57.36 17908585 +0.09 Qa3-g3 f5-f4 Rc8-c7 Kg7-f6 Rc7-c6
Kf6-e5 Qg3-g4 Qb4-e7 Rc6xh6 Rb1-b2 f2-f3
e4xf3 Qg4xf3 a4-a3 Qf3-d1
12(25). 1:40.09 31010806 +0.09 Qa3-g3 f5-f4 Rc8-c7 Kg7-f6 Rc7-c6
Kf6-e5 Qg3-g4 Qb4-e7 Rc6xh6 Rb1-b2 f2-f3
e4xf3 Qg4xf3 a4-a3 Qf3-d1
13(26)+ 3:08.92 57981149 +0.39 Qa3-g3 (f5-f4) (Rc8-c7) (Kg7-f6) (Qg3-g4)
(Qb4-d6) (Qg4-c8) (Rb1-b6) (Qc8-h8)
(Kf6-f5)
13(26)& 4:02.25 72838494 +1.04 Qa3-g3 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4
Qb4-d6 Qg4-c8 Rb1-b6 Qc8-h8 Kf6-f5 Rc7-f7
Kf5-g6 Rf7-g7 Kg6-h5 Qh8-e8 Kh5-h4 Qe8xe4
13(26). 4:56.38 89609608 +1.04 Qa3-g3 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4
Qb4-d6 Qg4-c8 Rb1-b6 Qc8-h8 Kf6-f5 Rc7-f7
Kf5-g6 Rf7-g7 Kg6-h5 Qh8-e8 Kh5-h4 Qe8xe4
14(27)& 6:09.22 109720920 +0.88 Qa3-g3 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4
Qb4-d6 Qg4-c8 Rb1-b6 Qc8-h8 Kf6-f5 Rc7-f7
Kf5-g6 Rf7-g7 Kg6-h5 Qh8-e8 Kh5-h4 Qe8xe4
Kh4-h5
>
>So what we really need to know whats the best move for Black in the position
>below.
>
>[D]2R5/6k1/7p/5pp1/pq2p3/6QP/5PPK/1r6 b - - 5 1
The Baron never selects anything else than f4, and the score is decreasing with
each iteration:
ply time nodes score pv
4(12). 0:00.06 16069 +1.72 f5-f4 Rc8-c7 Kg7-g6 Rc7-c6 Kg6-f7
Qg3-g4
5(13)& 0:00.09 22216 +2.00 f5-f4 Rc8-c7 Kg7-g6 Rc7-c6 Kg6-f7
Qg3-g4 Kf7-g7 (Rc6-c7)
5(14). 0:00.16 42163 +2.00 f5-f4 Rc8-c7 Kg7-g6 Rc7-c6 Kg6-f7
Qg3-g4 Kf7-g7 (Rc6-c7)
6(14)& 0:00.20 55078 +1.83 f5-f4 Rc8-c7 Kg7-g6 Rc7-c6 Kg6-h7
Rc6-c7 Kh7-g8 Rc7-c8 Kg8-f7 Rc8-c7 Kf7-f6
(Rc7-c6)
6(15). 0:00.39 112651 +1.83 f5-f4 Rc8-c7 Kg7-g6 Rc7-c6 Kg6-h7
Rc6-c7 Kh7-g8 Rc7-c8 Kg8-f7 Rc8-c7 Kf7-f6
(Rc7-c6)
7(15)& 0:00.52 149553 +1.45 f5-f4 Rc8-c7 Kg7-g6 Rc7-c6 Kg6-h7
Rc6-c7 Kh7-g8 Qg3-g4 Qb4-d6 Rc7-d7
7(16). 0:01.59 463544 +1.45 f5-f4 Rc8-c7 Kg7-g6 Rc7-c6 Kg6-h7
Rc6-c7 Kh7-g8 Qg3-g4 Qb4-d6 Rc7-d7
8(18)& 0:01.97 568995 +0.39 f5-f4 Rc8-c7 Kg7-f6 Rc7-c6 Kf6-e5
Qg3-g4 Qb4-e7 Rc6xh6 Rb1-b2 Rh6-g6
(Rb2xf2)
(Rg6xg5) (Ke5-d4)
8(18). 0:04.01 1146182 +0.39 f5-f4 Rc8-c7 Kg7-f6 Rc7-c6 Kf6-e5
Qg3-g4 Qb4-e7 Rc6xh6 Rb1-b2 Rh6-g6
(Rb2xf2)
(Rg6xg5) (Ke5-d4)
9(18)& 0:04.69 1345950 +0.40 f5-f4 Rc8-c7 Kg7-f6 Rc7-c6 Kf6-e5
Qg3-g4 Qb4-e7 Rc6xh6 a4-a3 Rh6-g6 a3-a2
Rg6xg5 Ke5-d4
9(21). 0:06.97 2077163 +0.40 f5-f4 Rc8-c7 Kg7-f6 Rc7-c6 Kf6-e5
Qg3-g4 Qb4-e7 Rc6xh6 a4-a3 Rh6-g6 a3-a2
Rg6xg5 Ke5-d4
10(20)& 0:10.75 3169274 +0.20 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4 Qb4-d6
Qg4-c8 Rb1-b6 Qc8-h8 Kf6-f5 Rc7-f7 Kf5-g6
Qh8-h7 Kg6-h5 Qh7xe4 (a4-a3)
10(23). 0:19.06 5692342 +0.20 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4 Qb4-d6
Qg4-c8 Rb1-b6 Qc8-h8 Kf6-f5 Rc7-f7 Kf5-g6
Qh8-h7 Kg6-h5 Qh7xe4 (a4-a3)
11(21)& 0:24.55 7301609 +0.00 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4 Qb4-d6
Qg4-c8 Rb1-b6 Qc8-h8 Kf6-f5 Rc7-f7 Kf5-g6
Rf7-g7 Kg6-f5 Rg7-f7 <rep>
11(23). 0:33.03 10189614 +0.00 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4 Qb4-d6
Qg4-c8 Rb1-b6 Qc8-h8 Kf6-f5 Rc7-f7 Kf5-g6
Rf7-g7 Kg6-f5 Rg7-f7 <rep>
12(25)& 0:52.64 15664536 -1.04 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4 Qb4-d6
Qg4-c8 Rb1-b6 Qc8-h8 Kf6-f5 Rc7-f7 Kf5-g6
Rf7-g7 Kg6-h5 Qh8-e8 Kh5-h4 Qe8xe4
12(27). 1:38.78 29046931 -1.04 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4 Qb4-d6
Qg4-c8 Rb1-b6 Qc8-h8 Kf6-f5 Rc7-f7 Kf5-g6
Rf7-g7 Kg6-h5 Qh8-e8 Kh5-h4 Qe8xe4
13(27)& 2:20.56 40737259 -1.12 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4 Qb4-d6
Qg4-c8 Rb1-b6 Qc8-h8 Kf6-f5 Rc7-f7 Kf5-g6
Rf7-g7 Kg6-h5 Qh8-e8 Kh5-h4 Qe8xe4 a4-a3
Qe4-e2
13(28). 3:47.00 67506194 -1.12 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4 Qb4-d6
Qg4-c8 Rb1-b6 Qc8-h8 Kf6-f5 Rc7-f7 Kf5-g6
Rf7-g7 Kg6-h5 Qh8-e8 Kh5-h4 Qe8xe4 a4-a3
Qe4-e2
14(29)& 5:04.08 89580708 -1.28 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4 Qb4-d6
Qg4-c8 f4-f3 g2-g3 Rb1-f1 Qc8-h8 Kf6-f5
Qh8-h7 Kf5-e5 Rc7-e7 Ke5-d5 Qh7xe4 Kd5-c5
Qe4-e3 Kc5-c4 Re7-e4 Kc4-b5 Qe3xf3
14(29). 7:57.09 142626537 -1.28 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4 Qb4-d6
Qg4-c8 f4-f3 g2-g3 Rb1-f1 Qc8-h8 Kf6-f5
Qh8-h7 Kf5-e5 Rc7-e7 Ke5-d5 Qh7xe4 Kd5-c5
Qe4-e3 Kc5-c4 Re7-e4 Kc4-b5 Qe3xf3
15(30)& 11:22.13 202486512 -1.67 f5-f4 Rc8-c7 Kg7-f6 Qg3-g4 Qb4-d6
Qg4-c8 Rb1-b6 Qc8-h8 Kf6-f5 Rc7-f7 Kf5-g6
Rf7-g7 Kg6-h5 Qh8-e8 Kh5-h4 Qe8xe4 Qd6-c6
Qe4-e2 f4-f3 Qe2-e5
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