Author: Mike S.
Date: 12:11:43 08/09/02
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On August 09, 2002 at 14:43:09, Heiner Marxen wrote: >(...) >Chest confirms a mate in 10 with 1.Rg8 as only key move (Athlon 1500+, 128MB, >all 4-piece and some 5-piece tables, 4.3 hours): > >PV: Rg8 f5 g5+ Qxg5+ fxg5+ Kxg5 Qd4 f4 Qe5+ Rf5 Qe7+ Rf6 Rf8 h6 Qxf6+ Kh5 Rh8 g5 >Rxh6# [Event "Thueringen Mohlsdorf"] [Site "?"] [Date "2000.??.??"] [Round "3"] [White "Junior 6.0 Athlon 1000"] [Black "Shredder 4.0 Athlon 800"] [Result "1-0"] [Annotator "Quick-08"] [SetUp "1"] [FEN "3R4/5r1p/5ppk/8/1Q3PPq/5P2/6K1/8 w - - 0 52"] [PlyCount "9"] 52. Rg8 Qh5 (52... f5 53. g5+ Kh5 54. Qd6) (52... g5 53. Qd6 Rg7 (53... gxf4 54. Qxf4+ Qg5 55. Qh2+) (53... Qe1 54. fxg5#) 54. Qxf6+ Rg6 55. Rxg6+ hxg6 56. Qh8#) 53. gxh5 Rc7 54. Qf8+ Kxh5 55. Qxf6 Rc2+ 56. Kg3 1-0 Fastest finders in this position (among those I've tested) are Shredder 5.32 and Genius 98/5 (!), and a little slower are Yace 0.99.56, King 3.12 sel.10 and Hiarcs 7.32. Most probably it's a zugzwang/nullmove issue, if an engine is fast or not here. http://meineseite.i-one.at/PermanentBrain/quick/quickxls.zip Regards, M.Scheidl
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