Author: Uri Blass
Date: 05:36:59 01/27/03
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On January 27, 2003 at 08:27:28, Mark Rawlings wrote: >On January 27, 2003 at 08:00:07, Mike Hood wrote: > >>Like many other spectators I was surprised by Deep Junior's 17th move. >> >>[D] r4rk1/pb1n1ppp/2qN4/4p1Pn/2p1P3/2Q1BN2/PP3P1P/2KR3R b - - 0 17 >> >>The quality sacrifice seems to achieve nothing. Chessbase's commentary on the >>move is "Gives a rook for a knight in order to save the pawn on e5" and gives a >>brief alternative line. I'm sure there is more to it than this. Could someone >>please post an analysis of what would have happened if DJ had played other >>moves, in particular Rab8? I don't see how Rab8 could have lead to anything >>worse than what actually happened. > >I let Fritz 7 run overnight on this. Something over 11 billion nodes... > >[Fritz 7: 2...Rab8 3.Nxe5 Nxe5 4.Qxe5 Qa4 5.Qc3 Qxa2 6.Qa3 Qxa3 7.bxa3 Ba6 8.e5 >Rb3 eval +1.21, 18 ply] > >Mark I do not understand Qc3 in that line It seems to be a bug that is common to Fritz7 and Fritz8. 5.a3 is the right move when 5.Qc3 simply is losing a pawn based on my analysis(for example Qxa2 6.Qa3 Qxa3 7.bxa3 Bc6 8.Rd4 Rb3 9.Rxc4 Rxa3). Uri
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