Author: Peter Kappler
Date: 20:03:31 08/02/01
Go up one level in this thread
On August 02, 2001 at 11:50:09, Thomas Blomquist wrote: >On August 01, 2001 at 04:32:57, Peter Kappler wrote: > >>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 > > > black must stop the majority with 1...Kg8! > Yes, this seems to be the way for Black to draw. Thanks! -Peter > for example 2 b4 Kf8 3 a4 Ke8 4 f4 e6 5 Bc5 h5... and black is ok. > If we took away both bishops then 1...g5 wins. > > Thomas
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.