Author: José de Jesús García Ruvalcaba
Date: 15:47:23 06/02/00
Go up one level in this thread
On June 02, 2000 at 13:31:53, Dann Corbit wrote: >On June 02, 2000 at 04:37:15, Paulo Soares wrote: >>On June 01, 2000 at 17:01:13, José de Jesús García Ruvalcaba wrote: >>>On June 01, 2000 at 13:01:25, Vincent Lejeune wrote: >>>>On June 01, 2000 at 11:48:37, José de Jesús García Ruvalcaba wrote: >>>>>On June 01, 2000 at 05:30:31, Vincent Lejeune wrote: >>>>>>On May 31, 2000 at 13:41:45, Dann Corbit wrote: >>>>>>>CAP records (some of them do not appear to have faired well): >>>>>>>6k1/8/2P5/p6p/5bP1/7P/2B2K2/8 w - - acd 20; acn 1174673323; acs 3601; ce >>>>>>>153; pv gxh5 Kg7 Kf3 Bh2 Kg4 Kh6 Bd1 Bc7 Kf5 Bb6 Ke6 Bc7 Kd7 Bf4 Kd8 Be5; >>>>>> >>>>>>I really doubt that gxh5 is the best move because the h's pawn have the wrong >>>>>>square colour to promote, if the black bishop stay on the h2-b8 diagonal with >>>>>>can make no progress. >>>>>>1.g5 seems to be stronger >>>>> >>>>> g5 loses a pawn outright. I agree that gxh5 is a poor move. I think Kf3 is >>>>>better. >>>>>José. >>>> >>>>If 1..Bxg5?, 2.c7! wins a queen ... >>> >>> You are right! This happens to me frequently when I do not set up real board >>>and pieces to analyze. >>> After 1. g5 black must play h4 (otherwise white plays h4, then Bd1 tying >>>black's king to defent the h5 pawn, and then the white king supports the c-pawn >>>and wins). 1. Kf3 attacks the bishop, so white can play g5 the next move. >>> Interesting position, and one in which a little knowledge for opposite-coloured >>>bishop endings is extremely helpful (in this case: when trying to win make both >>>bishops "good", and when trying to draw make both bishops "bad"). >>>José. >> >>Strange, I made a long analyse from this position and it seemed >>that 1. g5 and 1. Kg3 are winner moves. >> > >On a deep search, all three of gxh5, g5, and Kf3 fare about the same. gxh5 is a mistake, which should be avoided. > Here are >the positions *after* each of those choices are made, analyzed for three hours: > > >6k1/8/2P5/p6p/5bP1/5K1P/2B5/8 b - - acd 20; acn 2045418075; acs 10002; ce >-171; pv Bc7 gxh5 Again, 2. gxh5 is a poor move. 1. Kf3 is good if followed by 2. g5. >Kg7 Kg4 Kh6 Ba4 Be5 Bd1 Bh2 Kf5 Bc7 Ke6 Bh2 Kd7 Bf4 Kd8 Bg3 >Kd7 Kg5; > >6k1/8/2P5/p6P/5b2/7P/2B2K2/8 b - - acd 21; acn 2022412756; acs 10001; ce >-161; pv Kg7 Kf3 Bc7 Kg4 Kh6 Bd1 Bd8 Kf5 Bc7 Ke6 Bh2 Kd5 Bc7 Kd4 Bb6+ Kc4 Bc7 >Bg4 Be5 Kd5 Bg3 Ke6; > >6k1/8/2P5/p5Pp/5b2/7P/2B2K2/8 b - - acd 21; acn 2095662806; acs 10001; ce >-182; pv h4 Kf3 Be5 Kg4 Bg3 Ba4 Kf7 Kh5 Kg7 Bc2 Kg8 Kh6 Bf4 Bb3+ Kh8 Kh5 Bc7 Bg3 defending the pawn is better. If white can win the h4 pawn by force it follows a rather easy win. >Kxh4 Bd8 Kg4 Bc7; > >Naturally, since we are one ply forward, we are looking for the most negative >score. 1/5 of a pawn separates the best from the worst of the three choices. > >However, the first and the third positions both had fail lows at the end of >their searchs, so these are probably the best choices. > Do not trust crafty so blindly! It is obvious crafty is missing lots of things in this position (just follow the PV's you posted). José.
This page took 0.01 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.