Author: Uri Blass
Date: 20:33:28 12/22/00
Go up one level in this thread
On December 22, 2000 at 23:21:56, Uri Blass wrote: >On December 22, 2000 at 18:49:35, Thorsten Czub wrote: > >>is sometimes different to the thesis you have in mind. >>but - lets see here... >> >>[d]2r1k2r/5pp1/4p3/ppqpP3/4bQPP/1B6/PPP2R1R/2K5 b k - >> >>>a4 ! is very strong (1...a4 2.Qf7 Kd8 3. Qxg7 Qe3+ -+) but Tiger (2 versions) >>>doesn't see this move >> >>>How do perform other engines here ? >> >>ok - >>i don't see why this is a selectivity problem. >> >> >>first new paradigm: >> >>Gandalf likes a4, from the first seconds, in the moment >>giving +2.68 in search 11. >>1...a4 2.Bc4 O-O 3.Bf1 a3 4.Qd2 axb2+ 5.Kxb2 Bxc2 6.Ka1 >> >>CSTal 2.03 prefers Rc7 too and needs to come into search >>10 to see that 1...a4 is a "better" move. >> >>d10, 131s, c8c7 c2c3 a5a4 b3c2 e4c2 c1c2 a4a3 f4f3 a3b2 >>d10, 318s, >+1.96 a5a4 f4f7 >>d10, 391s, +2.23 a5a4 f4f7 e8d8 f7g7 c5e3 c1d1 e4f3 >> >>now normal intelligent programs: >> >>hiarcs7.32 says -1.12 against white for 1...a4 and wants >>to play a4 very early. I have seen it preferring a4 after 15", >>i am not sure if earlier, but unimportant IMO. >>after 2'40" it increases this score to -1.37 in search 10/29 >>against white with 1...a4 Bxd5 main line. >> >>diep: >>finds a4 too after a while >> >>stupid programs: >> >>junior6a likes a4 too. no problem for it. >>-1.22 against white after 26 seconds. >> >>fritz6a wants to play Rc7 and arround 15" changes to a4. >>later score says -1.47. >> >> >>so we learn: the key move is not found via score, it is mainly >>found by search. > >If it is the case then Crafty could have no problem to avoid castling but it has >problems to do it. >It likes a4 but changes its mind later to 0-0. I need to add that I mentioned Crafty because you consider it as a stupid program. I did not analyze 0-0 and it does not seem to me the correct move. Hyatt said that 0-0 seems to him more safe than a4. Dark thought has a different opinion. I do not feel that the king is safe after 0-0 but I did not analyze it(I only see some white pawns that may be dangerous in an attack and some piece behind the pawns and this is the reason that I am afraid from an attack after 0-0). Uri
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