Author: Paul
Date: 12:36:30 10/14/01
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On October 14, 2001 at 15:17:31, Heiner Marxen wrote: >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 Hi guys! Yep ... this one was a lot easier than the last one (on my p3/933), they all look difficult to me, but as usual, Pretz doesn't agree: 00:04 WM8 06 Ne3+ Q6d3 Qdxd3+ Nxd3 Q5xd3+ Qcxd3 Qaxd3+ Qxd3 Qdxd3+ Qe4 Qxe4+ Qcf5+ Qxf5+ Qxf5+ Qxf5# Groetjes, Paul
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