Author: John Merlino
Date: 19:40:41 06/03/02
Go up one level in this thread
On June 03, 2002 at 22:39:35, John Merlino wrote: >On June 03, 2002 at 19:06:31, Dieter Buerssner wrote: > >>On June 02, 2002 at 22:32:25, Dana Turnmire wrote: >> >>>-- -- -- -- -- -- -- -- >>>-- -- -- -- -- -- -- -- >>>-- -- -- -- -- -- BK -- >>>-- -- BP -- BP -- -- -- >>>-- -- WP -- WP -- WK -- >>>-- -- -- WN -- -- -- -- >>>-- -- -- -- -- -- -- -- >>>BB -- -- -- -- -- -- -- >>> >>>Here is the test position found in "The Mammouth Book of Chess." >>> >>>1Nxc5? >>> >>>This obvious, materialistic move throws away the win. White's c-pawn cannot be >>>advanced to the queening square without the help of the king, but this allows >>>Black to counter by attacking the e-pawn. White should not take the c-pawn, but >>>instead make progress on the kingside by manoeuvring his knight. >> >>Can you please show a (sample) winning line. My program went also for Nxc5 for 4 >>hours (on rather slow hardware). I tried to understand the pos myself. All I >>came up with - I cannot find improvement for white after this move, and I think, >>it is draw. However, I have no better idea, that secures the win. >> >>Regards, >>Dieter > >We just happened to have that book laying around, and since I hadn't done ENOUGH >typing today, I figured I'd quote the entire passage from "The Mammoth Book of >Chess", pg. 386, under the section entitled "Computer Chess". > >------------ >From Pachman-Hromadka, Prague Ch, 1944 > > Nxc5? This obvious, materialistic move throws away the win! "White's c-pawn >cannot be advanced to the queening square without the help of the king, but this >allows Black to counter by attacking the e-pawn" - Pachman > Supposing it were instead Black to move, the following variation is >enlightening: >1...Bd4 2.Ne1 Bf2 3.Nf3 Kf6 (or 3...Bd4 4.Nh4+ Kf6 5.Nf5) 4.Kh5 Bg3 5.Nh4! Bf2 >6.Nf5 Bg1 7.Nh6 Bd4 8.Ng4+ Ke6 9.Ng6 > >[D]8/8/4k1K1/2p1p3/2PbP1N1/8/8/8 > > White will now play Nf6-h7-g5+, etc., and win easily. However, if there were >no black pawn on c5, then Black would have sufficient counterplay to hold the >draw, since his king could use the c5-square to attack White's pawns. > Thus, in our start position, White should not take the c-pawn, but instead >make progress on the kingside by manoeuvring his knight. >------------ > >So, the question is, is that correct? Anybody care to throw some serious CPU >cycles at it? > >jm Whoops, got the FEN wrong: [D]8/8/4k1K1/2p1p3/2PbP1N1/8/8/8 w - - jm
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.