Author: Vincent Diepeveen
Date: 05:43:12 12/10/02
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On December 10, 2002 at 08:34:31, Nicolas GUIBERT wrote: > >>In draughts winning is a lot harder than in checkers. > >3 kings vs 1 king is a draw. That's the reason of the high percentage of draws >at top level. Ideas of adating the rules start being tested at international >level because of this problem. > >>See how easily napoleon came in 4th. Both games napoleon lost (against >>Dam and against tornado) were non-egtb problems. > >Through time, I have indeed lowered the impact of 5-6 men EGTB on the result. At >first, I thought that it was a must. Now I have a more mixed feeling about this. >With some good knowledge, many positions could be played quite good. Of course >this is different for the 3-4 men database which are much more important. > >>Against DAM the problem was the evaluation of a queen versus 2 pieces >>and against tornado it was the fact that i was so stupid to implement >>a kind of single nullmove 1 day before the tournament started which >>missed that it had to give away a piece in order to win the game >>(Napoleon had a winning position against Tornado). >> >>On the other hand we had an easy draw against Buggy. > >I only saw the end of the game Damage-Napoleon (endgame winning for Damage, but >drawn on time), what happened in this game ? I feel Damage is a very strong >program. Though I have not seen its games yet. > >By the way, I'd be interested in knowing how big Napoleon's evaluation function >is. Can you tell me this ? > >Nicolas Guibert. hello, the size of the evaluation of napoleon is only limited by the time i spent to it. I have 40 pages of evaluation patterns and ideas from Marcel to the left of this keyboard. For this tournament i could only implemet page 1 and 2. So i added 40 new patterns/bugfixes to the evaluation for last tournament the 2 evenings before the blitz tournament. In C code expressed it is in total let me check: 4000 source code lines. That ain't much IMHO, knowing i have a multiple of that in DIEP. But it is probably more than most draughts programs (and way more than most chess programs). there is many bugs in them basically. Some small parameters are real cool but some important patterns are of course very badly bugfixed are some very important patterns which happen all the time in draughts. My draughts knowledge is too limited what happened in the game against Damage. Of course joining this tournament with a book from 1998 (and not a single move fixed from it, only some evaluation issues fixed) was asking for trouble. Book is more important than you posted here. If you feel book is not important then be a gentleman and play 1 time without book. Best regards, Vincent
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