Author: Kurt Utzinger
Date: 13:50:39 12/15/03
Go up one level in this thread
On December 15, 2003 at 16:23:15, Dieter Buerssner wrote: >[D] 5k2/1R4p1/5p2/4p2p/1p2P2P/r4P2/PK4P1/8 b - - > >This is from a game between Ruffian-Yace in the "CSS-Online-Masters" (time >control 60 15). > >I think, after Ra4, white cannot make progress, and the game will end in draw. >Yace played Re3? instead (with 0.0 score). Are there engines, that show in >reasonable time a big score difference between Re3 and Ra4?. I believe Re3 loses >by force. For example Re3 Rxb4 Re2 Kb3 Rxg2?! (possibly Re3 instead gives more >resistance) a4. > >It is not a real good test position, because engines can show for a long time >the same score for Ra4 and Re3, and the chosen move might be pure luck. >Therefore also the question for scores after those moves. > >Regards, >Dieter New game 5k2/1R4p1/5p2/4p2p/1p2P2P/r4P2/PK4P1/8 b - - 0 1 Analysis by Fritz 8: (P4 1.8/32 MB hash) 1...Ra4 2.g4 g5 3.hxg5 hxg4 4.fxg4 fxg5 5.Kb3 Ra3+ ² (0.35) Depth: 7/20 00:00:00 23kN 1...Rd3 2.Rxb4 Rd2+ 3.Kb3 Rxg2 ² (0.32) Depth: 7/20 00:00:00 41kN ² (0.32) Depth: 8/19 00:00:00 72kN 1...Ra4 2.g3 Ra3 3.g4 Rxf3 4.gxh5 f5 5.Rxb4 Rf2+ 6.Kb3 Rf3+ ² (0.28) Depth: 8/19 00:00:00 83kN ² (0.32) Depth: 11/25 00:00:01 800kN 1...Rd3! ² (0.28) Depth: 11/27 00:00:02 1399kN = (0.13) Depth: 11/27 00:00:02 1787kN 1...Re3 2.Rxb4 Re2+ 3.Kb3 Rxg2 4.a4 Rg3 5.a5 Rxf3+ 6.Ka2 g5 7.a6 Ke7 8.Ra4 Rf2+ = (0.10) Depth: 11/27 00:00:03 2117kN = (0.25) Depth: 13/31 00:00:08 5115kN 1...Ra4 2.g4 g6 3.gxh5 gxh5 4.Rh7 Ra3 5.Rxh5 Rxf3 6.Rh8+ Ke7 7.Rb8 Rh3 8.Rxb4 Rxh4 9.Kb3 = (0.22) Depth: 13/31 00:00:10 6267kN = (0.22) Depth: 18/57 00:04:09 162881kN, tb=88 (Utzinger, MyTown 15.12.2003)
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