Author: Heiner Marxen
Date: 05:28:54 04/17/01
Go up one level in this thread
On April 11, 2001 at 22:39:09, leonid wrote: >On April 11, 2001 at 21:33:08, John Merlino wrote: > >>On April 11, 2001 at 21:25:08, Paul wrote: >> >>>On April 11, 2001 at 21:21:09, John Merlino wrote: >>> >>>>Chessmaster 8000 says Mate in 8: >>>> >>>>Time Depth Score Positions Moves >>>>0:00 1/3 26.85 15041 1. Nxe6+ Nxe6 2. Nxc6+ Nxc6 3. >>>> Qfxf3 Bxb4+ 4. Nxb4 Qxb7 5. Qxb3 >>>> Nexd4 >>>>0:01 1/4 Mate10 87791 1. Nxe6+ Nxe6 2. Nxc6+ Nxc6 3. >>>> Qxc7+ Nxc7 4. Qexe7+ Nxe7 5. Qxc7+ >>>> Rxc7 6. Rxa8+ Nc8 7. Qxd7+ Rxd7 >>>> 8. Rxd7+ Kxd7 9. Qdb5+ Kd8 10. >>>> Qbxd6# >>>>0:03 2/5 Mate08 181566 1. Nxe6+ Nxe6 2. Qxe7+ Bxe7 3. >>>> Nxc6+ Nxc6 4. Qbxc7+ Nxc7 5. Qexe7+ >>>> Rxe7 6. Rxg8+ Be8 7. Qxe7+ Nxe7 >>>> 8. Qd6# >>>> >>>>jm >>> >>>Hey ... that's a bit slow, 3 seconds ... John, are you sure you didn't have 2 >>>engines running at the same time? ;) >>> >>>Paul >> >>Ok, I can see the humor in that LOW BLOW! ;-) >> >>jm > >If the time is for selective search then 3 second is very realistic number. Mine >solved it by selective in 0.71 sec for 8 moves. I don't know how long it could >take by brute force. I imagine that it will be much longer. 7 moves by brute >force took already 11 min and 5 sec. > >Leonid. [D]q1rkr1q1/RQpbpQR1/N1qbq1N1/n1NBN1n1/1Q1B1Q2/1q1Q1q2/3K4/2Q1Q3 w - - Chest finds two moves that lead to a mate in 8 (K7/600, 350MB hash), using 7.6 minutes (67.8 seconds for depth=7). Here are the PVs: Nxc6+ Nxc6 Qxc7+ Bxc7 Nxe6+ Nxe6 Qfxe7+ Nxe7 Qcxc7+ Rxc7 Rxa8+ Bc8 Qxc7+ Nxc7 Qd6# Nxe6+ Nxe6 Qxe7+ Bxe7 Nxc6+ Nxc6 Qbxc7+ Nxc7 Qexe7+ Rxe7 Rxg8+ Be8 Qxe7+ Nxe7 Qd6# Slowly I'm catching up with your problems ;-) Heiner
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