Author: Robert Hyatt
Date: 08:12:59 12/30/97
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On December 30, 1997 at 07:13:39, Chris Whittington wrote: > >On December 29, 1997 at 17:41:52, Robert Hyatt wrote: > >>On December 29, 1997 at 16:03:23, Chris Whittington wrote: >> >>> >>>But isn't the real flaw with tests that they test for finding solutions, >>>but now how to get into those positions in the first place. And which >>>posiitons steered to is very subjective. Tal would steer different to >>>Tarrasch .... >>> >>>Chris Whittington >>> >> >>The gripe I have is with "finding" in general. IE I'd like to find >>some positions that are "positional"... where we all agree that a 4 ply >>search is enough to see "why". Many positional tests are really deep >>tactical tests. Others are positional, but they require deep searches >>to see the "stinger" at the end, so faster searches again help. I'd >>like to see a pure knowledge-based test suite where the "stinger" is >>not so deep that it takes a deep search to find it. And where "right" >>is =+1, wrong = 0, and the score at the end gives some measure of how >>strong the program is. SO far I've seen nothing like this... > >This doesn't solve the problem of how to test for relatively neutral >positions. Like the start position, e4, d4, nf3 and various other moves >are perfectly acceptable, and the choice depends on a bunch of factors, >importantly what type of chess game you like to play. > >How are you going to test for this or any other position where there's a >'steering' choice ? > >Chris Whittington I agree. What I'm after is a position that could be described like this: there is a 4 ply combination of moves that allows white to plant a rook on the 7th rank. In this position, the rook is a paralyzing force that black can't do anything about, except get his pieces all tangled up trying to defend the threats this rook presents. There is also a 4 (or less) ply combination of moves that gives black a pair of weak pawns on a7 and c7, but these weaknesses are not nearly so devastating as the rook on the 7th *in this position*. There could be other alternatives as well. So that *if* everyone agrees that the rook on the 7th here is a killer, and is better than any of the other possible positional outcomes, this position would be useful to calibrate evaluation terms. If I had many such positions, I'd be "on my way" to a much better-tuned evaluation. :)
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