Author: Robert Hyatt
Date: 12:27:42 03/19/99
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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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