Author: Sune Fischer
Date: 04:35:53 02/25/04
Go up one level in this thread
>> >>I believe that this is not really a tactical shoot, this is an evaluation based >>sacrifice. Some engines will find this very fast, others won't find it at all. > >I agree >I saw no claim that it is a tactical sacrifice. > >My program see +0.16 for black at depth 13 after Nxc3 bxc3 >It probably can find Nxc3 from the root position after enough time but it was >not important enough for me to check. > >After Nxc3+ bxc3 the score is positive since depth 10. If I'm not mistaken white gets two minors for a rook and pawn + a busted pawn shelter. The two knights for the rook and pawn is evaluated as good white in frenzee, and I don't give huge scores for a busted shelter when there is no eminent attack. I haven't analyzed the position thoroughly but to me it looks like the black pieces aren't coordinated very well for an attack(?), and white has some defensive capabilities as well. I question if it is not too speculative to sacrifice here without a deeper search to see if the attack is really dangerous or not. Ruffian's tuning seems more balanced, as posted elsewhere on this thread it doesn't jump at it instantly but takes a little while before it convinces itself that the sac is 'good enough'. Frenzee fails high by about 0.4 pawn for white after the exchange and it stays that way for a few minutes. I guess if I give 0.5 pawn more for a busted shelter it too will find the amazing sacrifice instantly :) >> >>Mine still likes white better after Nxc3 bxc3 and a few minutes of search. >>Of course it has no king safety at the moment, but aside from that it looks like >>white is not completely dead :) >> >>9 71 97 634373 2...Nd5 4.Kb2 cxd4 5.cxd4 Nc3 6.Qf1 Nxd1+ 7.Qxd1 Qf6 8.Qb1 >>10 64 207 1450310 2...Nd5 4.Rc1 cxd4 5.cxd4 Nc3+ 6.Rxc3 Rxc3 7.Kb2 Qc7 >>8.gxf5 exf5 >>11 59 447 3347308 2...Nd5 4.Rc1 cxd4 5.cxd4 Nc3+ 6.Rxc3 Rxc3 7.Kb2 Qc7 >>8.gxf5 exf5 9.Rg2 d5 >>12 78 913 7020065 2...Nd5 4.Rc1 cxd4 5.cxd4 Nc3+ 6.Rxc3 Rxc3 7.Kb2 Qc7 8.e4 >>fxe4 9.Nxe4 Bxe4 10.Qxe4 >>13 76 7849 60175453 2...Nd5 4.Rc1 cxd4 5.cxd4 Nc3+ 6.Rxc3 Rxc3 7.Kb2 Qc7 >>8.Ne5 d5 >> >> >>-S. > >It seems that frenzee has a bug >I see 2...Nd5 4.Rc1 > >where is move 3? Nice catch, haven't noticed this before. There must be a bug in the numbering of the moves when it's not analyzing from the root position. -S.
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