Author: Uri Blass
Date: 08:59:58 08/24/05
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On August 24, 2005 at 11:14:48, Robert Hyatt wrote: >On August 24, 2005 at 03:05:25, Uri Blass wrote: > >>On August 24, 2005 at 01:23:26, Majd Al-Ansari wrote: >> >>>A human will immediately assess that black has a passed pawn on kingside so his >>>own passed pawn on queenside cannot be supported by the king .... therefore an >>>obvious draw without any calculation needed. >> >>I think that you overestimate humans. >>I was not talking about the top humans but about the big majority of humans who >>play in tournaments. >> >>Of course humans can see that black cannot support the passed pawns by the king >>after some thinking but not immediately. > >Sorry, but I disagree here. But then I have worked on this exact code in Crafty >many times. I don't even have to think about the king-side majority that >becomes a passed pawn. So when I saw the position, my only question was "can >black do anything on the queenside without the king, because the king has to >restrain white's passed pawn on the kingside. > >After looking for a few seconds, I thought "no". So now it does become some >calculation to see if either can win when both have passers on opposite wings. >Since white's king is positioned OK, didn't take me much to come up with >"draw"... I know that basically 2 pawns cannot win without the king but I also know basically that with 2 pawn advantage in pawn endgame you can win and when you have 2 passed pawns and the oponnent only has pawn majority it seems to me thatit probably a win for the side with 2 passed pawns. Only after thinking about it I see that the king cannot support the pawns. pawn majority of 2 against 1 is not something that I am afraid of based on experience and here is an example [D]8/8/pk4pp/8/PP5K/8/8/8 w - - 0 1 pawn majority does not help white and note that black has only one pawn advantage and not 2 pawn advantage. Uri
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