Author: Paul
Date: 19:01:39 01/25/01
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On January 25, 2001 at 21:48:06, Heiner Marxen wrote: >On January 25, 2001 at 20:41:50, Paul wrote: >>Thanks for checking that for me. I couldn't believe it at first!! >> >>I really hope some other programmer will also try this, coz I don't use >>proofnumber search, just 'plain' alpha-beta. Didn't know it was possible. > >Since the solution line is nearly completely forced, that does not >look so impossible to me. I would expect that some programs do find this one, >depending on the nature of extensions they do. > >>Heiner, is it out of reach for Chest? What do you think? > >Yes, that is absolutely out of reach for Chest. The problem is not to find >the solution, but to prove all the non-solutions up to a depth of 38. >For depth 9 Chest needs 111 seconds, and increasing the depth by one, >multiplies the search time by 4. Do the math and be shocked. ;-) Math of the 'exp'loding kind :) I just reran it with slightly different settings (max extension of 100 ply), and now Pretz already found the solution at 7 ply in only 23 seconds !!! Gee wizzz ... ain't life pretty :) Paul
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