Author: Heiner Marxen
Date: 12:17:31 10/14/01
Go up one level in this thread
On October 14, 2001 at 13:27:35, leonid wrote: >Hi! > >If you want solve one mate that is not very deep and difficult, this is exactly >of this type: > >[D]2K1b1B1/1P1Qqp1R/Q1Qq1qk1/1Qq3qn/Pn5b/1Nq3r1/Q1Nq1p1B/1Q1Qr1R1 w - - > >Please indicate your result. > >Thanks, >Leonid. You are right, Leonid, this one is quite accessible to brute force search. Chest (on K7/600 with >10MB hash) needs only 42.94 seconds to judge this as a mate in 8 with a unique key move: PV: Ne3+ Qcd3 Q5xd3+ Q6xd3 Qdxd3+ Qxd3 Qdxd3+ Nxd3 Qaxd3+ Qe4 Qxe4+ Qcf5+ Qxf5+ Qxf5+ Qxf5# Black has very good counter measures: in 71% of the cases black mated white in one. Here is the timing, showing a really small EBF: # 1 0.00s 0kN 0.97 1- 0 # 2 0.00s 0kN [ 13.67] 1.00 1- 0 # 3 0.01s 1kN [ 10.17] 0.95 66- 0 # 4 0.06s [ 6.00] 5kN [ 5.56] 1.16 332- 0 # 5 0.35s [ 5.83] 21kN [ 4.53] 1.49 1398- 0 # 6 1.37s [ 3.91] 76kN [ 3.60] 2.19 5186- 0 # 7 4.74s [ 3.46] 250kN [ 3.31] 3.36 18631- 0 # 8 42.88s [ 9.05] 2108kN [ 8.42] 3.47 220222- 0 Cheers, Heiner
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.