Author: Uri Blass
Date: 23:09:28 02/11/01
Go up one level in this thread
On February 11, 2001 at 22:13:00, Robert Hyatt wrote: >On February 11, 2001 at 18:23:01, Uri Blass wrote: > >>On February 11, 2001 at 18:10:33, Robert Hyatt wrote: >> >>>On February 11, 2001 at 12:24:21, Vincent Lejeune wrote: >>> >>>>in this position : >>>> >>>>[d]k7/p7/1p6/3p4/3K1B2/r7/8/4R3 w - - 0 1 >>>> >>>>Gambit Tiger 1.0 gives +2.14 for white , I think it's a big overevaluation for >>>>white ! >>>> >>>> >>> >>> >>>It's a common enough error. In reality if anybody wins, black wins. White >>>has no winning chances at all. >> >> >>I disagree. >> >>In a game between humans white has chances because he has chances to capture all >>the black pawns and win the KRB vs KR endgame. >> >>In a game between computers white has also chances if the defender does not use >>the KRB vs KR tablebases. >> >>It is a draw but I prefer white because white captures one pawn and is not going >>to lose with Rook and bishop against Rook and 2 pawns beacause the pawns are at >>a7 and b6 and the king is in the middle of the board so it is easy for white to >>prevent the pawns to get forward. >> >>Black practically may lose by the following steps: >>1)losing the pawns >>2)not finding the right moves in KR vs KRB endgame. >> >>Uri > > >Black can also drop dead and his flag will fall. :) > >Otherwise I can't imagine black losing this. Drawing KRB vs KR is _not_ >a difficult task. Here is a position that white lost in a comp-comp game when both sides di not use tablebases. [D]7R/8/8/2k5/6Kp/8/7r/5n2 w - - 0 1 White(Gandalf4.32f played Rxh4 but it did not help it to save the game against Fritz6) The game was at tournament time control and it proves that you have practical chances even in KRN vs KR if your opponent has not the right knowledge. KRN vs KR is usually a draw between humans but I know that humans often win KRB vs KR endgames. One of the examples that I remember is from one of the olympiads more than 10 years ago when IM ilan manor won a game for Israel in KRB vs KR position. The opponent was not a weak player otherwise IM manor could beat him more easily without KRB vs KR position. If you know how to play KR vs KRB then a draw is not a difficult task in most of the cases but a lot of humans do not know how to play it. Uri
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