Author: Dieter Buerssner
Date: 17:58:58 03/09/01
Go up one level in this thread
On March 09, 2001 at 20:18:31, Sune Larsson wrote:
> 8/1p6/5Pp1/7p/7k/3p4/7K/8 w - - 0 1
> Test: No joke - white moves for the win. I think your programs
> will make it. Take a look at the evals - they will alter
> quite a bit... The path to the fulfilment further down.
I also tried this one. Yace chooses f6 immediately. But there is only a draw
score. Yace wants to follow the line you suggested
>1.f7 d2 2.f8Q d1Q 3.Qf4+ Qg4 4.Qe3 b6 5.Qe7+ Qg5 6.Qe4+ Qg4 7.Qe3 b5 8.Qe7+ Qg5
>9.Qe4+ Qg4 10.Qe3 b4 11.Qe7+ Qg5 12.Qxb4+ Qg4 13.Qe7+ Qg5 14.Qe4+ Qg4 15.Qe3 1-0
until 3...Qg4. Unfortuneately, it won't find 4.Qe4 within 5 minutes. After this
time I lost patience and forced 4.Qe3. Then I get the following:
1195311 8.048 0.00 15. 4...b5 5.Qe7+ Qg5 6.Qb4+ Qg4 7.Qe7+ {240}
2913408 18.792 -1.89 16-- 4...b5 5.Qe7+ Qg5 6.Qe4+ Qg4 7.Qe3 Qg1+ 8.Qxg1
b4H {HT}
8374013 52.677 -8.78 16t 4...b5 5.Qe7+ Qg5 6.Qe4+ Qg4 7.Qe3 b4 8.Qe7+
Qg5 9.Qxb4+ Qg4 10.Qe7+ Qg5 11.Qe4+ Qg4 12.Qe3
Qe2+ 13.Qxe2 Kg5 14.Qe6 Kh4 15.Qf6+ Kg4
16.Qxg6+ Kh4 {-921}
10437719 1:07.2 -8.78 16. 4...b5 5.Qe7+ Qg5 6.Qe4+ Qg4 7.Qe3 b4 8.Qe7+
Qg5 9.Qxb4+ Qg4 10.Qe7+ Qg5 11.Qe4+ Qg4 12.Qe3
Qe2+ 13.Qxe2 Kg5 14.Qe6 Kh4 15.Qf6+ Kg4
16.Qxg6+ Kh4 {-921}
11083927 1:11.1 -9.18 17-- 4...b5 5.Qe7+ Qg5 6.Qe4+ Qg4 7.Qe3 Qh3+ 8.Qxh3+
Kg5 9.Qg3+ Kf5 10.Qb3 b4 11.Qxb4 Kf6 12.Kg3 Kg7
13.Qe7+ Kg8 14.Kh3 h4 15.Kxh4 Kh8 {-921}
After which I lost patience again. Hmm - somehow Yace seems to do totally wrong
pruning decisions here, otherwise it should have found this line earlier.
Perhaps another good test-position would be the position after 3...Qg4
[D] 8/1p6/6p1/7p/5Qqk/8/7K/8 w - - 2 4
-- Dieter
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