Author: Alvaro Rodriguez
Date: 11:42:36 08/13/00
Go up one level in this thread
On August 13, 2000 at 14:16:43, Uri Blass wrote: >On August 13, 2000 at 11:13:04, Alvaro Rodriguez wrote: > >>On August 13, 2000 at 10:59:22, pete wrote: >> >>>For my personal pleasure I have played a little match Crafty-Tiger, both without >>>opening book and tablebases , Time control 40 in 40 ; Tiger on a PIII500 , >>>Crafty on 4 Ultra-Sparc 450 CPUs . >>> >>>Two interesting positions : >>> >>>a.) >>> >>>[D]3r1rk1/2p1Rppp/p4n2/1p1b4/3P4/3B3P/PPPN2P1/4R1K1 b - - 0 1 >>> >>>Here Tiger played what seems to be the decisive mistake 21. ... Bxa2 ?? >> >>> >>>This is an interesting move IMHO as the bishop doesn't get lost at all , it >>>simply can't participate in the game anymore ; in fact it lasts until the 46th >>>move when white finally wins the bishop . It seems to me without special code it >>>is impossible to avoid this ( for example Fritz 6a would play like that too) . >>> >>>Is it possible to survive after Bxa2 ? Which programs will avoid Bxa2 ? >> >>When you say that the bishop doesn´t ge lost, in fact it does, because the >>bishop don´t have a good square to move!! It´s not participating in the game at >>all, and white is a piece down.. It´s interesting to see what other programs >>play... I think this move is slightly more interesting then the other game, >>because this is certainly a losing move IMO.. > >I will not play this move in a game but I am not sure that Bxa2 is losing. >It is possible that black can free the bishop by sacrificing the pawn by the >idea a5,a4 and get material equality and free bishop. > >White need something to protect b3 so the white pieces are also not 100% active. > >Uri Lets look at this variation : 1..Bxa2 2. b3 Nd5 3. R7e4 Nb4 4. Rh4 * Black can play f5, looks safe..White plays Ra1 and black has to "create" some pressure on the rook or something to avoid white to play Be2/Bf1 and f3... White can´t play Be2 or Bf1 instantly because of Nxc2 and then Nxd4... I guess you´re partly right, it´s not losing but it gets very difficult to win for black. The plan a6-a5-a4 is a little slow and I don´t think black gets any time to play that.. Regards, Alvaro
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.