Author: Gerhard Vetter
Date: 04:08:24 02/20/00
Go up one level in this thread
On February 19, 2000 at 13:10:52, Peter McKenzie wrote: >On February 18, 2000 at 22:58:32, Ricardo Gibert wrote: > >>On February 18, 2000 at 03:43:31, Peter McKenzie wrote: >> >>>On February 18, 2000 at 01:49:52, Steffen Jakob wrote: >>> >>>>Hi all, >>>> >>>>can someone please give me the solution (not only the key move (b4 or h4) but >>>>whole lines) of position #7 from the "uskieg" test suite? >>>> >>>>[D]8/7p/p7/1p1k4/8/3K4/1P4PP/8 w >>>> >>>>How long does your program take to find the solution and which tablebases do you >>>>have installed? >>>> >>>>Best wishes, >>>>Steffen. >>> >>>LambChop likes 1.b4 from the word go, but after a few minutes doesn't see the >>>win. >>> >>>I think 1.b4 does win, white has the plan of creating a passed pawn on the >>>kingside to lure the black king away, then the white king gobbles the queenside >>>pawns. This is a bit tricky to carry out because black's king is active. >>> >>>After 1.b4 Ke5 2.g3 Kd5 3.g4 Ke5 4.Ke3 Kd5 5.h4 white should be too fast. >>> >>>Instead, 2...Kf5 looks a better defense. Now 3.Ke3? Kg4 4.Kf2 Kh3 5.Kg1 a5! is >>>fine for black. >>> >>>Better is 3.h3 Ke5 and I think the surprising 4.h4! is good for white. >>> >>>Hope I'm not talking nonsense here, its getting late :-) >>> >>>cheers, >>>Peter >> >>My analysis assisted by Fritz: >> >>1.b4 Ke5 2.g3 Kf5 3.h3 Ke5 4.h4 >> [4.Ke3 Kd5 5.g4 Kc4 6.g5 Kxb4 7.h4 Ka3 probably =] >>4...h5 5.Ke3 Kf5 >> [5...Kd5 >> A) 6.g4 hxg4 7.h5 (7.Kf4 a5=) >> 7...Ke5 8.h6 Kf6 9.Kf4 Kg6 10.Kxg4 a5=; >> B) 6.Kf4 6...Kc4 7.g4 a5 8.g5 Kd5 9.g6 >> Ke6 10.g7 Kf7 11.g8Q+ Kxg8 12.bxa5+-] >>6.Kf3 Ke5 >> [6...a5 7.bxa5 b4 8.Ke3+-] >>7.g4 hxg4+ 8.Kxg4 a5= >> >>This all looks fairly routine, but there could be something >>clever Fritz & I missed. > >It looks correct to me. >I'm now of the opinion that 1.b4 leads only to a draw, can anyone see a win for >white there? The position is drawn and 1.b4 is the easiest way to reach the draw. The position first appeared in the now defunct Austrian Computer-chess-magazine "Modul" and was supposed to check if the programs could find the blockading move b4.
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