Author: Heiner Marxen
Date: 13:17:57 12/23/01
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On December 22, 2001 at 09:21:12, leonid wrote: >Hi! > >This one is very accessible: > >[D]2qQQq2/r6P/b1PqqR1N/r6B/n1BRQQ1B/q6k/q1NKNP1q/bq4qn w - - > >Second is almost identical but slightly deeper. I was not sure what position >must be chosen, so I ended by putting both of them. > >[D]2qRQq2/p6P/q1BqqR1N/r6B/n1QNQQ1B/r6k/b1QKNP1q/bq4qn w - - This second one was much harder for Chest. On my K7/600 (with 30 MB hash) it needed 15.7 hours to verfy the unique solution for the mate in 11: PV: Q8xe6+ Qdxe6 Qff3+ Rxf3 Qxf3+ Qgg3 Nf4+ Kxh4 Qxg3+ Qxg3 Nf3+ Qxf3 Ng2+ Kh3 Qh4+ Kxg2 Bhxf3+ Kg1 Qxh1+ Kxf2 Qg2# Here is my timing info: # 1 0.00s 0kN 0.87 1- 0 # 2 0.00s 0kN 1.00 1- 0 # 3 0.02s 2kN [ 16.87] 0.97 81- 0 # 4 0.25s [ 12.50] 17kN [ 10.28] 1.07 737- 0 # 5 2.19s [ 8.76] 137kN [ 7.88] 1.21 8654- 0 # 6 14.49s [ 6.62] 791kN [ 5.79] 1.49 66512- 0 # 7 71.55s [ 4.94] 3676kN [ 4.65] 2.11 351906- 503 # 8 376.68s [ 5.26] 18024kN [ 4.90] 2.60 2012336- 1225917 # 9 2398.57s [ 6.37] 111493kN [ 6.19] 2.86 13048731- 12262300 # 10 11945.63s [ 4.98] 548603kN [ 4.92] 3.28 67242252- 66455821 # 11 52742.57s [ 4.42] 2454461kN [ 4.47] 3.94 309165358- 308378927 More hash table would have helped more, but the real memory was already bound to another Chest computation, so I was left with 30 MB. Cheers, Heiner
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