Author: Robert Hyatt
Date: 12:27:42 03/19/99
Go up one level in this thread
On March 19, 1999 at 14:59:52, Peter McKenzie wrote:
>On March 19, 1999 at 12:48:04, Bruce Moreland wrote:
>
>>5rk1/5ppp/p1Q1p3/1R6/q7/4b1P1/P2RPP1P/6K1 w - - 0 1
>>
>>The key is 1. Rd8, which Kasparov didn't find.
>>
>>It isn't hard to find for a computer, but I think they will typically think it
>>is a draw. Can anyone find a score that indicates *significant* advantage to
>>white?
>
>Not me.
>I let Chop run for about half an hour on this one, and it was still saying Rd8
>with a 0.00 score at the end.
>
>>
>>What this means in practice is, can anyone resolve (hopefully from the root) the
>>near-perpetual after:
>>
>>1. Rd8 Qxb5 2. Qd6 Bxf2+ 3. Kxf2 Qf5+
>>
>>bruce
I searched this a while and got this:
11-> 12.90 0.00 1. Rd8 Qxb5 2. Qd6 Bxf2+ 3. Kxf2 Qf5+
4. Kg2 Qe4+ 5. Kh3 Qf5+ 6. Kg2
12 16.30 0.00 1. Rd8 Qxb5 2. Qd6 Bxf2+ 3. Kxf2 Qf5+
4. Kg2 Qe4+ 5. Kh3 Qf5+ 6. Kg2
12-> 26.07 0.00 1. Rd8 Qxb5 2. Qd6 Bxf2+ 3. Kxf2 Qf5+
4. Kg2 Qe4+ 5. Kh3 Qf5+ 6. Kg2
13 35.13 0.00 1. Rd8 Qxb5 2. Qd6 Bxf2+ 3. Kxf2 Qf5+
4. Kg2 Qe4+ 5. Kh3 Qf5+ 6. Kg2
13-> 59.52 0.00 1. Rd8 Qxb5 2. Qd6 Bxf2+ 3. Kxf2 Qf5+
4. Kg2 Qe4+ 5. Kh3 Qf5+ 6. Kg2
14 1:49 0.26 1. Rd8 Qxb5 2. Qd6 Bxf2+ 3. Kxf2 Qf5+
4. Kg2 Qe4+ 5. Kh3 Qf5+ 6. g4 Qf1+
7. Kg3 Qg1+ 8. Kf3 Qf1+ 9. Ke3 Qh3+
10. Kd2 Qh6+ 11. e3 g5 12. Rxf8+ Qxf8
13. Qxa6
14-> 2:28 0.26 1. Rd8 Qxb5 2. Qd6 Bxf2+ 3. Kxf2 Qf5+
4. Kg2 Qe4+ 5. Kh3 Qf5+ 6. g4 Qf1+
7. Kg3 Qg1+ 8. Kf3 Qf1+ 9. Ke3 Qh3+
10. Kd2 Qh6+ 11. e3 g5 12. Rxf8+ Qxf8
13. Qxa6
15 3:25 0.00 1. Rd8 Qxb5 2. Qd6 Bxf2+ 3. Kxf2 Qf5+
4. Kg2 Qe4+ 5. Kh3 Qf5+ 6. g4 Qf1+
7. Kg3 Qg1+ 8. Kf3 Qf1+ 9. Kg3
15-> 6:17 0.00 1. Rd8 Qxb5 2. Qd6 Bxf2+ 3. Kxf2 Qf5+
4. Kg2 Qe4+ 5. Kh3 Qf5+ 6. g4 Qf1+
7. Kg3 Qg1+ 8. Kf3 Qf1+ 9. Kg3
16 8:43 0.00 1. Rd8 Qxb5 2. Qd6 Bxf2+ 3. Kxf2 Qf5+
4. Kg2 Qe4+ 5. Kh3 Qf5+ 6. g4 Qf1+
7. Kg3 Qg1+ 8. Kf3 Qf1+ 9. Kg3
So for one brief moment at depth=14 I had a slightly + score, but it dropped
back to 0.00
Bob
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