Author: Howard Exner
Date: 08:46:15 11/27/99
Go up one level in this thread
On November 27, 1999 at 02:08:20, allan johnson wrote: >On November 26, 1999 at 03:12:49, allan johnson wrote: > >> Could someone with a Rebel 10 on a fairly fast machine tell me how long it >>takes to find Bb5 in the following problem. >>2r1r1k1/pp1bb2p/3pppp1/q6n/4P2Q/2N1BPP/PPP1BP2/2KR2R1 (white to move) >> On my Celeron 433 64mb ram Rebel 9 finds Bb5 in 1.17min.It is not until >>2.43mins that it also locates the sac bxg5 after 1Bb5 Bxb5 2Qxh4 g5.Up until >>then it suggests h4. >>I'd also be interested in how long it takes Fritz6 to find the moves Results >>will effect my next computer chess program purchase. >>Thanks Allan > >Sorry about the stuff up.Late night you know.Anyway it should read >2N1BPP1 on line 6 and Qxh5 move 2. >The position arises from a game back in 1986 between Hitech and Schach 2.7 >Dr Laszlo Lindner who reviewed the game in Chess Life (nov 1986) said that >Hitech's creative achievement in this game represented a milestone in computer >chess."If Schach 2.7 had accepted White's rook sac on move 23 there would > have been 10 distinct mating variations with the black king mated on 10 >differnt squares!" >The full game is below > White Hitech > Black Schach > Opening Sicilian Defence > 1e4 c5 > 2Nf3 d6 > 3Bc4 e6 > 4d4 cxd4 > 5Nxd4 Nf6 > 6Nc3 Be7 > 7Be3 Nbd7 > 8Qd2 Ne5 > 9Be2 0-0 > 10h3 Bd7 > 11Nf3 Nxf3+ > 12gxf3 Qa5 > 130-0-0 Rac8?(Rfc8) > 14Rhg1 Rfe8 > 15Bh6 g6 > 16Bg5 Qc5? b5 was suggested > 17Qf4 Nh5 I know Fischer can get away with it but knights on > the side of the board?Hmmm > 18Qh4 f6 > 19Be3 Qa5 > 20Bb5! The straight forward Qxh5 looks better. See below. Bxb5 > 21Qxh5 g5 Apparently at this stage GM Hort said that if you played > 21..Rxc3 then black threatens 22...Rxc2+! 23Kb1 Rxb2+!! > 24Kxb2 Qb4+ and black forces mate.Hans Berliner, the > developer of Hitech then pointed out that Hitech calculated > mate in 7 after 21...Rxc3 22Rxg6+ Kh8 23Qxh7+Kxh7 24Rh6+ Kg7 > 25Rg1 Kf8 26Rh8+ Kf7 27Rh7+ Kf8 28Bh6 mate.Everyone in the hall > ,according to Lindner, was stupified. > Anyway back to the game Instead of g5 why not Bf8? I do not see a forced mate for white now. Did the article give any analysis for 21 ... Bf8? Am I missing something? > 22Bxg5 fxg3 > 23Rxg5+!! Kh8 > 24R(d)g1 Resigns > So what do people think of the standard of play in this game?How does it > rate in terms of chess understanding in relation to today's programs/ > Is it possible to evaluate a progam's strenght from a game like this? > As I said in one comment Knights on the side of the board is something I try to >avoid.I know that sometimes it's difficult to do and a situation might arise >in which it is useful to put it there.The point is though could the position >have been avoided with better previous moves?Comments anyone? >Regards Rabbits
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