Author: Sune Larsson
Date: 13:44:47 02/25/01
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On February 25, 2001 at 13:46:32, Sune Larsson wrote: > > [D]8/5p1k/r5pp/P7/3R3P/6P1/5PK1/8 w - - 0 1 > > > 1927 Alekhine won the 34th game in the battle vs Capablanca to become > World Champion. He did it by playing 1.Ra4! in the above position. > Black's rook has to block the pawn and white has at his disposal an > endless reserve of rook moves along the a-file. Again, the future for > black spells "Zugzwang". The general rule is that a passed pawn should > be supported by a rook from the rear. That's why ideas of 1.Rd5? are > wrong. This is a knowledge that have to be implemented in many chessprograms. > I have seen numerous examples of trying to support such a pawn sideways. > > What would your favourite program play? > > Sune And here is the choice of Deep Fritz 8/5p1k/r5pp/P7/3R3P/6P1/5PK1/8 w - - 0 1 Analysis by Deep Fritz: 1.Kf3-- = (0.19) Djup: 1/3 00:00:00 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 12/12 00:00:00 10kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 12/12 00:00:00 10kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 12/12 00:00:00 10kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 12/12 00:00:00 10kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 12/12 00:00:00 10kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 12/12 00:00:00 10kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 12/12 00:00:00 10kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 12/12 00:00:00 10kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 12/12 00:00:00 10kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 12/12 00:00:00 10kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 12/12 00:00:00 10kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 12/12 00:00:00 10kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 12/12 00:00:00 10kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 12/12 00:00:00 10kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 13/13 00:00:00 20kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 14/14 00:00:00 38kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Ke4 Tc6 5.Te5+ Kd6 6.f4 Tc4+ +- (1.75) Djup: 15/15 00:00:00 82kN 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Tb5 Kd6 5.Ke4 Tc6 6.f4 Tc4+ +- (1.78) Djup: 16/30 00:00:11 7508kN, tb=18 1.Td5 Kg7 2.g4 Kf6 3.Kf3 Ke6 4.Tb5 Kd6 5.Ke4 Tc6 6.f4 Tc4+ +- (1.78) Djup: 17/32 00:00:43 27792kN, tb=133 1.Td5 h5 2.Kf3 Kg7 3.Tb5 Kf8 4.Kf4 Ke7 5.f3 Tf6+ 6.Ke4 Tc6 +- (1.84) Djup: 18/34 00:03:10 123283kN, tb=1155 (Larsson, KIL 25.02.2001)
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