Author: John Lowe
Date: 06:00:09 12/25/02
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On December 25, 2002 at 07:21:03, Uri Blass wrote: >On December 25, 2002 at 07:05:43, Richard Bean wrote: > >>movei: >> >>>>perft 5 13,853,661(0.922 seconds) >>>>perft 6 115,892,741(38.505 seconds) >>>>perft 7 17,650,572,059(time 1182.761 seconds on 1000 mhz) >> >>Crafty and my program output 470,702,875 and 17,650,572,059 - 470,702,875 = >>2^34. I must forgotten a "long long" somewhere in the version I still have. >> >>Also chest gets the above perft result. >> >>Can someone verify my perft 10 result from the initial position - >>69,353,847,899,771, or verify the number of unique nodes at plies 4 to 8? > >movei on 1000 mhz >perft 4 197281 time 0.02 seconds >perft 5 4865609 time 0.601 seconds >perft 6 119060324 time 15.222 seconds >perft 7 3,195,901,860 time 385.494 seconds > >You can see that for perft 8 I may need more than 2 hours >I need some days for perft 9 and I need some months for perft 10 and many years >for perft 11. > >Uri Forgive an observation from one who knows 0 (+/-6), but although doing the Full Monty at ply 1 may usually be irrelevant it must be the cheapest irrelevancy in computer chess. You would have needed a different position for timing your beasties. Cheers John
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