Author: Dann Corbit
Date: 14:46:39 01/25/02
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On January 25, 2002 at 17:39:19, Uri Blass wrote: >On January 25, 2002 at 17:31:56, Dann Corbit wrote: > >>On January 25, 2002 at 17:25:56, Albert Silver wrote: >>[snip] >>>I don't think that's necessary, unless by playing nearly perfectly you just mean >>>avoiding losing moves. The way you put it, it sounds as if there are very few >>>non-losing moves (i.e. a narrow road to avoid losing against perfect play) >>>whereas I believe there are many many roads to a draw that even perfect play >>>from the other side would not easily avoid. >> >>Perhaps. Imagine this: >> >>How many times will a 5 year old, who correctly knows the rules of chess but >>never sees beyond 2 plies do against Kasparov? I submit that they will never >>win or draw, for all practical purposes. >> >>A perfect player verses Kasparov should be far more dominating than that. > >I disagree here. >I believe that the difference kasparov and a 5 year old is bigger than the >difference between the perfect player and kasparov. A child that sees 2 plies compares with Kasparov's 14 plies is 1/7th of the depth. From the Chess FAQ: Subject: [24] Trivia How long is the longest possible chess game? The basic idea is a player may claim a draw if fifty moves elapse without a capture or a pawn advance. Ignoring the special cases where more than 50 moves are allowed by the rules, the answer is after Black's 5948th move, White is able to claim a draw. The simple calculation is (<Pawn_moves + - + <Drawing_interval_grace_period) * <Drawing_interval, or (16*6 + 30 - 8 + 1) * 50 = 5950; we're able to trim two moves from this total by observing that sequences of Captures/Pawn_moves must have (at least) 4 alternations between the two players. That means the perfect player can see (5948 * 2)+1 plies = 11897 plies. That's a ratio of 11897/14 = 850/1 Have you ever watched two programs that play against each other and one is constantly getting outsearched by a mere 4 plies? It's not a pretty sight.
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