Author: Tony Werten
Date: 02:54:25 02/23/01
Go up one level in this thread
On February 23, 2001 at 01:56:13, Ferdinand S. Mosca wrote: > >Yace 0.99.08 - P.ConNerS (0-1) >IPCC-2001, Paderborn (2), 21.02.2001 > >8/4k1p1/5p2/KP6/P7/4r2p/3R4/8 w - - 0 1 > >Probably the point where Yace could have drawn the game. >Black's last move is 41...h3 and Yace responded with 42. b6?! > >Is there any program that considers 42.Rb2? From ply 7 XiniX only considers b6. After a big think ( 8 min, ply 12 ) it returns a repetitiondraw score. Tony > >I thought 42.Rb2 can draw the game, with the following analysis: > >[42.Rb2!! probably difficult to see because it is clear that black's king can >reach the b8 square, and in addition the rook has abondoned the important d-file >which cuts off the black king. >42...Kd7 43.b6 Re8 generally using a rook to stop the passed pawn may not be >good, but this is probably the interesting line > >(the other alternative is >43...Kc8?! 44.Ka6! threatening to play Ka7 >44...Kb8 45.Rd2! black is suddenly in trouble >45...Re8 46.Rd7 not an ordinary rook in the 7th rank >46...h2 47.Rb7+ Kc8 (If 47...Ka8 then simply 48.Ra7+ Kb8 49.Rb7+= with perpetual >check) >48.Rc7+ Kb8 (48...Kd8?? 49.Rc1!) >49.Rb7+=) > >44.Kb5 freeing the a-pawn >44...Rh8! >a)44...Kc8 45.a5 Re5+ 46.Ka6 g5 47.Rc2+ Kb8 48.Rc7 Re8 49.Rb7+=; >b)44...Re5+? 45.Ka6 Kc8 46.Rh2±; > >45.Rh2 g5 46.Ka6 Ra8+ (46...g4 47.b7 f5 48.Ka7 f4 49.a5 g3 50.Rxh3 g2 51.Rxh8 >g1Q+ 52.Ka8=) 47.Kb5 g4 48.b7 Rg8 (48...Rb8?? 49.Kb6 f5 50.a5+-) 49.Kb6 g3 >50.Rxh3 g2 51.Rd3+ Ke6 52.Rd1 g1Q+ 53.Rxg1 Rxg1 54.a5 Rb1+ 55.Kc7 Rc1+ 56.Kb6 >Rb1+ 57.Kc7=] > >Regards, >Dinan
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.