Author: Oliver Roese
Date: 08:55:17 03/04/01
Go up one level in this thread
On March 03, 2001 at 12:18:09, Vincent Lejeune wrote: >On March 03, 2001 at 10:29:43, Steffen Jakob wrote: > >>Hi Sune, >> >>I appreciate your test positions. Unfortunately I don't follow CCC regularly at >>the moment. It would be great if you could provide a single document with all >>those positions (preferable in EPD). >> >>Best wishes, >>Steffen. > [...] >Subject: Testposition - good knight vs bad bishop II >From: Sune Larsson >E-mail: astrochess@kil.xpress.se >Message Number: 156108 >Date: February 26, 2001 at 17:08:51 > > > [D]4b3/5k2/4p1p1/3pP2p/2pP1P1P/2P5/6N1/2K5 w - - 0 1 > > Burn-Alekhine Karlsbad 1911 > > > Amos Burn's only victory over Alekhine, in a good knight versus bad bishop > ending, is virtually a walk-over. The game went like this: > > 1.Kb2 Ba4 2.Ne3 Ke7 3.Ka3 Bc6 4.Kb4 Kd7 5.Ka5 Kc7 6.Nc2 Kb7 7.Nb4 Bd7 > 8.Na6 Be8 (if 8.-Bc8 9.Nc5+ and the king penetrates) 9.Nc5+ Kc6 10.Nxe6 > and white won. > > Test1: The above position. This is won for white and your program should > give white a big +score. Though we may dream about the day when > +9.99 pops up...;) > > > Test2: Exchange the bad bishop on e8 for a better one on e7. This position > is a draw and your program should evaluate it close to 0.00. > The new position below: > > > [D]8/4bk2/4p1p1/3pP2p/2pP1P1P/2P5/6N1/2K5 w - - 0 1 > I have to protest about the judgement of this one. Actually white is far closer to a loss than to a draw. This stems from the fact that white has to use half of his forces to protect his weak pawn on h4, a serious flaw of his position. Meanwhile black treats to penetrate over the queenside. There is no passive defense against this, since the keymove Ba3 will always lead to a breakthrough for black. Apparently whites hopes are grounded on ..f5 !? gxf5 (or exf5 ??) Nf4 with counterplay, if blacks king is far away. A careful analysis shall reveal if this is enough for white. Maybe this complex position is simply not well suited as a testcase?? Have fun Oliver
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.