Author: leonid
Date: 12:57:47 01/19/02
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On January 19, 2002 at 15:04:13, William Sprague wrote: >On January 19, 2002 at 08:21:10, leonid wrote: > >>[D]R2NN2R/1pnqknp1/1B4B1/1q1nn1q1/1b1QQ1b1/1Q4P1/1QPqqQK1/Q1r2r1Q w - - >> >>Please indicate your result. >> >>Thanks, >>Leonid. > >CM-8000 on a P4 at 1.3 gig with 1 meg hash found mate in 1m 25 secs. > >Time Depth Score Positions Moves >0:02 1/3 22.26 116930 1. Qdxe5+ Qe6 2. Qexb4+ Qdxb4 3. > Qxb4+ Kd7 4. Qxb5+ Qxb5 5. Qxf7+ > Rxf7 6. Nxe6 >0:03 1/4 20.53 215839 1. Qdxe5+ Qe6 2. Qexb4+ Qdxb4 3. > Qxb4+ Kd7 4. Qxb5+ Nxb5 5. Qxe6+ > Bxe6 6. Qxf1 Qxf1+ 7. Qxf1 Nxb6 > 8. Qaxc1 Nxh8 >0:23 1/5 18.91 1533781 1. Qdxe5+ Qe6 2. Qbxb4+ Qdxb4 3. > Qbxb4+ Kd7 4. Qxb5+ Qxb5 5. Qhxf1 > Rxf1 6. Qxf7+ Rxf7 7. Nxe6 Qxe5 > 8. Qexe5 >1:25 1/6 Mate11 5953531 1. Qdxe5+ Qe6 2. Qbxb4+ Qdxb4 3. > Nc6+ Qxc6 4. Qxg5+ Kd7 5. Qd8+ > Nxd8 6. Qxg7+ Qf7 7. Rxd8+ Kxd8 > 8. Nf6+ Qce8 9. Rxe8+ Qxe8 10. > Qxd5+ Qd6 11. Qxc7# >2:22 1/7 Mate11 10227875 1. Qdxe5+ Qe6 2. Qbxb4+ Qdxb4 3. > Nc6+ Qxc6 4. Qxg5+ Kd7 5. Qd8+ > Nxd8 6. Qxg7+ Qf7 7. Rxd8+ Kxd8 > 8. Nf6+ Qfe8 9. Rxe8+ Qxe8 10. > Qxd5+ Qd6 11. Qxc7# For program that is not specialized for solving the mate, result is excellent. Number of moves is shortest - 11. I presume that mate was found by selective search. By brute force this position is not extremely easy to solve. Even search for 10 moves took for mine more that 1 hour. Leonid. >Bill
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