Author: Robert Hyatt
Date: 11:55:25 02/13/04
Go up one level in this thread
On February 12, 2004 at 23:16:17, Uri Blass wrote: >On February 12, 2004 at 12:20:34, Robert Hyatt wrote: > >>On February 12, 2004 at 06:03:37, Uri Blass wrote: >> >>> >>>The main point is that programs should not evaluate unclear position as winning. >>> >>>Black has a big advantage without capturing the pawn so there is no reason to >>>capture h3 and get unclear pawn endgame. >> >>This is wrong. And here is why... >> >>If you don't evaluate such positions, you depend on blind luck. At _best_ your >>"blind luck" will let you win 1/2 the positions you choose to not evaluate >>because they are unclear. > >I do not say always evaluate them as unclear but only evaluate part of them as >unclear. Sure, but what about the "rest"? IE many will _still_ fall under a general rule, such as "distant passer wins". I'd rather do that than to say "I am not sure" because that will wreck the search result. IE for _every_ case I want to pick a rule that will be right more than it is wrong. That is doable. Being right 100% of the time is only possible in certain cases of course... > >There are cases when you can be 99% sure that unstoppable passed pawn wins(for >example when the opponent most advanced pawn is less advanced and the question >what to do when it does not happen. > >unclear also does not mean exactly 0 and may be something between -1.xx and >+1.xx > >It may be dependent on how much the opponent pawns are advanced and how much the >opponent king is advanced. In these sharp endings, you _must_ make a choice.. One tempi and the result changes, and you can't wait for the search to clear things up when you are making a decision on which endgame position you are going to play into... > >In the relevant case black pawns are more advanced than the unstoppable white >pawn and I am not sure what happens in most of these positions. In most white wins, because the white pawn is totally unstoppable, while the white king is in position to stop either of the black pawns from running in uncontested... > >Uri
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