Author: Heiner Marxen
Date: 15:34:31 12/03/02
Go up one level in this thread
On December 03, 2002 at 17:25:27, leonid wrote: >On December 02, 2002 at 12:24:45, Richard Pijl wrote: > >>On December 02, 2002 at 12:07:23, Art Basham wrote: >> >>>This is a good test for portables! >>> >>>White plays Rxh6+...and mates in 10...! >>> >>>[D]3r3k/p4Qp1/7p/1b1Bp3/4Pp2/7R/4nqPP/4R2K w - - >>> >>>Saitek Travel Champion takes just 5 ply and finds it in 17 sec. >>> >>>Novag Amber takes about 25 sec. >>> >>>Fidelity Par Excellence (5 Mhz) takes 6 ply ....3 min. and 21 sec. >>> >>>Fidelity Mach 3 (16 Mhz) finds it in 27.5 sec. >> >>The Baron on a portable :-) computer (Pentium II-500) takes 3 seconds (7 ply) to >>find Rxh6 and 9 seconds (10 ply) to report the mate > >I just wanted to find how long it will take to solve this position on Pentium >kind of computers when I came to Your response. Still, if somebody will come >with Chessmaster's time it will be curious for me to see. > >LLchess mate solver find mate in 10 moves deep, by selective search, in zero >seconds. Zero - less then 0.055 sec. Computer is Celeron 600Mhz. No hash. > >By brute force this position can take pretty long time for my program, since >branching factor did dramatic jump between 7 and 8 move. Time of response for 8 >moves was 1 min 48 sec. I stopped right there. Oh, now I dare to post the Chest timing ;-) (Athlon 1500+, 128MB hash): # 6 0.03s [ 3.00] 6kN [ 3.36] 1.73 367- 0 # 7 0.15s [ 5.00] 28kN [ 4.79] 1.81 2153- 0 # 8 1.49s [ 9.93] 324kN [ 11.72] 1.90 24634- 0 # 9 14.13s [ 9.48] 3246kN [ 10.02] 2.32 241594- 0 # 10 1168.71s [ 82.71] 259891kN [ 80.08] 2.90 17547590- 14348357 So, it jumped also, but not before the last depth. Well, a BIG jump. That are 19.5 minutes total. PV: Rxh6+ gxh6 Qf6+ Kh7 Qe7+ Kh8 Qxd8+ Kg7 Qg8+ Kf6 Qf8+ Kg5 Qg7+ Kh5 Bf7+ Kh4 Qxh6+ Kg4 Be6# The key move is unique. Cheers, Heiner
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