Author: Peter Kappler
Date: 01:32:57 08/01/01
Go up one level in this thread
On July 31, 2001 at 08:41:17, Robert Hyatt wrote: >On July 31, 2001 at 02:19:14, Mark Young wrote: > >>On July 31, 2001 at 01:05:53, Bruce Moreland wrote: >> >>>[D] 8/4ppbk/p5pp/3pP3/3B4/5P1P/PP3P2/6K1 b - - 0 1 >>> >>>My thing got smashed by Ulf Andersson in this position. It wants to play ... g5 >>>and sticks with it for a long time on a P3/550, like something over a minute, >>>and it didn't have near enough time to avoid getting creamed. >>> >>>I'm pretty sure that ... g5 is dead lost. I'm less sure about ... h5 or ... e6. >>> >>>A recent Yace switches away in about 12 seconds on one processor of my quad Xeon >>>450, and Crafty 18.10 takes 22 seconds to shift away. I'm surprised about >>>Crafty since I'd thought that it should do better given its knowledge of >>>majorities. >>> >>>Anyone have any other insights? If you would like to tell how fast another >>>program shifts away from ... g5, please include hardware. >>> >>>bruce >> >>Fritz 6, ChessTiger 14, GambitTiger 2.0 were the best I tested. All programs >>changed away from g5 in about 1 sec. Hardware: PIII 1000 Mhz 512K Ram. > > >On my machinek, I get e6 in about 6 seconds. I think the problem here is that >black ends up with a protected passed pawn and in a piece-less ending, a >protected passed pawn is generally better than a simple distant majority. >The opponent can win the isolated passer while the protected passer sticks. >My evaluation here is -.44 (good for black) after e6. Whether it will win >that or not is a guess. Ulf is very strong of course... I've played him >several games as well... Ulf was White in this game. I think the outside majority is the real story here, and Black is struggling to draw, or perhaps just losing. I certainly can't see Black playing for a win. Here's a cute line that illustrates the power of that majority: 1...e6 2 b4 Bf8 3 Bc5 Kg8 4 Bd6! Bxd6 5 exd6 Kf8 6 a4 Ke8 7 b5 axb5 8 a5 +- Certainly not a forced line, but amusing. -Peter
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.