Author: Terry McCracken
Date: 16:59:59 06/12/02
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On June 12, 2002 at 16:46:50, Ferdinand S. Mosca wrote: >While studying king and pawn ending, I have met this position. Both sides have >protected passer, Black's rook is passive while white's rook is looking for >weakneses. There is however a nice temporary sacrifice by white that is hidden, >which brings the game to a won king and pawn game for white. The resulting KP >game is not that easy to evaluate for many programs since either side has no >passer, white's king is far from the center, white's pawn at a5 appears to be >somewhat over extended and black's pawns are more advanced. There is at least 2 >solution to this setup, first is to bring the rook to b-file which can >simultaneously attacks both the black's king position and the backward black's >b-pawn. The second solution is a more straight forward human touch, 51. Rxg7 >that was played by the great GM Kasparov way back in 1998 on a simultaneous >exhibition game against Groshenny. >From initial test of some free engines only Yace can do 51. Rxg7. I have no >Fritz 7 and Hiarcs 8 at the moment, will somebody also post the analysis of this >two strong engines? > >Regards, >Dinan >[D]6R1/1p1r2p1/p3k1Pp/P2pP2K/2pP4/2P5/1P6/8 w - - 0 51 The engine that solves this ending the fastest is Shredder 6! Shredder 6.02 takes 2x longer! Shredder 6 see Rxg7! in approx. 1 min with 64MB of hash on a SLOW P-III 500! I'm sorry I didn't save the "Readout" and since Shredder "Learns" it will now play it instantly. It surprises me the Shredder 6 beats Shredder 6.02, but whats more surprising is the Shredder Classic ver. of Shredder Paderborn can't see Rxg7 after 3+ min.? Shredder 6 Classic again solves it within a minute, also 64MB for hash. Could someone who has Shredder 6 do this test again both using the ChessBase ver. and the Classic ver., both for the readout and to verify that Shredder 6.02 CB ver. is slower than Shredder 6 CB ver.; And that Shredder Paderborn Classic is a "dud" on this position! Regards, Terry
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