Author: Peter Kappler
Date: 22:01:16 06/30/99
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On June 30, 1999 at 18:03:14, Chuck wrote: >rn3rk1/pp2ppbp/6p1/8/3PP1b1/5N2/q2BBPPP/1R1Q1RK1 w - - 0 1 > >I had Hiarcs 7.32 search the above position for several hours to a depth of 11 >ply, and it wants to play Rxb7 scoring this +0.69. However, in looking at Fritz' >opening book, the move is not mentioned, only Bg5, Be3, and d5. > >This position arises from the Grunfeld Exchange, D85 as follows: > >1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 >7. Nf3 c5 8. Rb1 O-O 9. Be2 cxd4 10. cxd4 Qa5+ 11. Bd2 Qxa2 12. O-O Bg4 > >I searched the 2 million games opening database and found six occurrences with >no names that I recognized. In the six games, White drew 3 and lost 3 (1.5-4.5), >so that indicates the pawn should be left alone. > >But this brings up my point? Is Hiarcs heading for trouble? Is the pawn >poisoned, but in such a deep line that computers can't see it in reasonable >time? And will all computers make this mistake, if it is one? > >I'm interested in what other computers and other people have to say about this >position. How about it? > >Chuck In my opinion, White cannot afford to give up his d-pawn, even if he wins the b & e pawns in the process. A simple variation is Rxb7 Bxf3 Bxf3 Bxd4 Rxe7 Nc6 where White has won back his gambit pawn, but Black's minor pieces are more active and the passed a-pawn is very dangerous. I think White must preserve his "big center" in this position. --Peter
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