Author: Uri Blass
Date: 22:07:34 07/30/04
Go up one level in this thread
On July 30, 2004 at 13:54:15, Jim Monaghan wrote: >Hi, > >I would like some analysis help from the group with those of you with fast >machines. I've posted 4 positions below in pgn format so you can simply copy and >paste into your favourite engine. If you go up and down the solution tree you >might spot a "hole" in the solution. My machine is simply too slow. The >positions are fairly intricate. Thanks in advance. > >This one is a complex attack on the king. > >[D]5rk1/p1q1ppb1/3p2p1/3P1bBp/1pr4P/5PN1/PPPQ2P1/1KR4R b - - > >[Event "?"] >[Site "?"] >[Date "0000.??.??"] >[Round "?"] >[White "IQ.1027"] >[Black "?"] >[Result "*"] >[SetUp "1"] >[FEN "5rk1/p1q1ppb1/3p2p1/3P1bBp/1pr4P/5PN1/PPPQ2P1/1KR4R b - -"] > >1... Bc3 2. Qe2 b3 3. axb3 (3. Nxf5 bxa2+ 4. Ka1 Rb4) >3... Ra4 4. Nxf5 (4. bxc3 Qxc3 5. bxa4 Qb3+ 6. Ka1 Qxa4+) >4... Qa5 5. Nxe7+ Kh7 6. bxa4 Rb8 7. Rcf1 Rxb2+ 8. Kc1 Rb1+ >* > >Interesting knight sac with the BK blocked in and weak dark squares. It seems that this sacrifice is not winning because of 4.Bd2 Bxb2 5.Kxb2 Qc5 6.Bb4 Qxb4 7.Nxf5 gxf5 8.Ra1 with equality I gave Fritz8 4 alternatives and 4.Nxf5 or 4.bxc3 are not in it's top 4 alaternatives. IQ.1027 [D]5rk1/p1q1pp2/3p2p1/3P1bBp/r6P/1Pb2PN1/1PP1Q1P1/1KR4R w - - 0 1 Analysis by Fritz 8(depth 14): 1. ± (0.78): 4.Bd2 Bxb2 5.Kxb2 Qc5 6.Bb4 Qxb4 7.Nxf5 Qa3+ 8.Kc3 gxf5 2. = (-0.22): 4.bxa4 Rb8 5.Qb5 a6 6.Nxf5 axb5 7.Nxe7+ Kg7 8.a5 Bxa5 9.Nc6 Ra8 10.g4 Bb6 11.Rhe1 3. µ (-0.94): 4.Rcd1 Rb8 5.Rd3 Bxd3 6.Qxd3 Qa5 7.bxa4 Bxb2 8.Qc4 Be5+ 9.Kc1 Bxg3 10.Bd2 Qb6 11.Qb3 Qxb3 12.cxb3 Rxb3 4. µ (-1.19): 4.Ne4 Rb8 5.Nxc3 Qxc3 6.Qe3 Qa5 7.bxa4 Qb4 8.b3 Qa3 9.Qe4 Bxe4 10.fxe4 f6 11.Be3 Qxa4 12.Rhe1 (, MyTown 31.07.2004) Uri
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