Author: Vasik Rajlich
Date: 02:29:57 05/12/04
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On May 12, 2004 at 02:15:52, Uri Blass wrote: >[D]r1bq1rk1/ppp2ppp/2n2b2/3Pp3/8/3P1N2/PPP1BPPP/RN1Q1RK1 b - - 0 1 > >In this position I considered the move e4 that wins material but rejected it. > >I calculated e4 dxe4 Bxb2 dxc6 Bxa1 c3 and I did not like my trapped bishop at >a1 so I decided to keep the pair of bishops and played Ne7 with the idea to take >the pawn with the knight(the alternative c4 e4 dxe4 Bxb2 is bad for white). > >I later analyzed it with chess programs and I found that the decision if to play >e4 is a positional decision but they are not afraid of c3 > >The problem is that the line e4 dxe4 Bxb2 Nd1 Bxa1 Qxa1 is evaluated as only >small advantage for black or even advantage for white by part of the programs. > >New game - Fritz 8, 40'/40 eim >r1bq1rk1/ppp2ppp/2n5/3P4/4P3/5N2/P1PNBPPP/Q4RK1 b - - 0 1 > >Analysis by Quark: > >11...Ne7 12.Qd4 Re8 13.Bd3 Bg4 14.Rb1 > ² (0.46) Depth: 6 00:00:00 31kN >11...Ne7 12.Qd4 Re8 13.Bd3 Bg4 14.Rb1 > ² (0.46) Depth: 6 00:00:00 41kN >11...Ne7 12.Qd4 Ng6 13.e5 Bf5 14.Ne4 Qe7 > ² (0.35) Depth: 7 00:00:00 109kN >11...Ne7 12.Qd4 Ng6 13.e5 Bf5 14.Ne4 Qe7 > ² (0.35) Depth: 7 00:00:00 220kN >11...Ne7 12.Qd4 f6 13.c4 Bd7 14.Rb1 Qb8 15.e5 > ² (0.47) Depth: 8 00:00:01 523kN >11...Ne7 12.Qd4 f6 13.c4 Bd7 14.Rb1 Qb8 15.e5 > ² (0.47) Depth: 8 00:00:02 612kN >11...Ne7 12.Qd4 b6 13.c4 Qd6 14.e5 Qa3 15.d6 Nc6 > ² (0.27) Depth: 9 00:00:08 2033kN >11...Ne7 12.Qd4 b6 13.c4 Qd6 14.e5 Qa3 15.d6 Nc6 > ² (0.27) Depth: 9 00:00:08 2120kN >11...Ne7 12.Qd4 b6 13.c4 Ba6 14.Bd3 Qd7 15.Ne5 Qd6 16.Rc1 > ² (0.33) Depth: 10 00:00:19 4864kN >11...Ne7 12.Qd4 b6 13.c4 Ba6 14.Bd3 Qd7 15.Ne5 Qd6 16.Rc1 > ² (0.33) Depth: 10 00:00:22 5765kN >11...Ne7 12.c4 Qd6 13.Qc3 b6 14.e5 Qg6 15.Nd4 Bg4 16.Rb1 a5 > = (0.17) Depth: 11 00:01:12 18617kN >11...Ne7 12.c4 Qd6 13.Qc3 b6 14.e5 Qg6 15.Nd4 Bg4 16.Rb1 a5 > = (0.17) Depth: 11 00:01:13 19029kN >11...Ne7 12.Qd4 b6 13.Rb1 a5 14.c4 Qd6 15.e5 Qa3 16.Ra1 Bf5 17.Ng5 > ² (0.28) Depth: 12 00:03:05 49439kN >11...Ne7 12.Qd4 b6 13.Rb1 a5 14.c4 Qd6 15.e5 Qa3 16.Ra1 Bf5 17.Ng5 > ² (0.28) Depth: 12 00:03:28 55826kN > >(blass, eim 12.05.2004) > > >I think that this line is clearly better for black. >I also think that I was wrong to be afraid of c3 but in the game I decided not >to take risks in a line that I was not sure if I can calculate and keep my small >advantage. > >What is your opinion? > >Uri I'd play .. Qxd5 here, black looks better than after .. e4 dxe4 Bxb2 Nbd2, and you don't have to worry about dxc6 and c3. Vas
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