Author: blass uri
Date: 03:22:49 02/15/00
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On February 15, 2000 at 04:52:58, Bas Hamstra wrote: >On February 14, 2000 at 12:00:54, blass uri wrote: > >>On February 14, 2000 at 11:18:21, Bas Hamstra wrote: >> >>>So far experiments indicate that 2x speed advantage is pretty significant. But >>>exactlly how much? Why don't you run a match of 100 games? My bet is the faster >>>one wins 75%. >> >>75% is 200 elo difference and there is no 200 elo difference by being twice >>faster. >> >>If you want 75% you probably need 8x faster hardware. >>> >>>For 99% certaincy you probably need at least 10x faster hardware, I think. >> >>I think that maybe no hardware advantage will help to get 99% because of the >>fact that there are games when the result is decided by book and not by the >>program. >> >>>Because chess is partly a game of luck and in 100 games the faster engine might >>>easiliy get killed once because of a rotten openingline. Unless the speed >>>difference is enormous. >> >>I do not see how speed difference can help if the end of the book line is a >>simple win for one side or a simple draw. > >If it is not a ridiculous book, there are no simple wins. You can get a better >position, right out of book. But to *win* that superior position is quite >something else. Especially against 2x faster hardware. A friend of mine comes >99% of the time out of opening with serious advantage, using Crafty with his own >backsolved and handtuned superbook. But some advantage is not enough, when you >play against 4x faster hardware. And the game is long... I agree that some advantage is not enough but I saw cases when program came with evaluation of more than 3 pawns advantage out of book. These cases are rare but happen. There are more cases when I saw a forced draw out of book. If I assume that in 1 out of 100 games there is a forced win and that in 2 out of 100 games there is a forced draw then 99:1 is impossible Uri
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