Author: Mark Young
Date: 06:14:50 05/12/04
Go up one level in this thread
On May 12, 2004 at 02:15:52, Uri Blass wrote: >[D]r1bq1rk1/ppp2ppp/2n2b2/3Pp3/8/3P1N2/PPP1BPPP/RN1Q1RK1 b - - 0 1 I think Qxd5 is best for black. Black has the 2 bishops, more space, and center control. White has problem some minor problems with his bishop on e2, but no long term weakness. Black must be some what better here! 1... Qxd5 2. Nc3 Qd8 3. Re1 Be6 4. Qd2 Qd7 5. Qe3 Rfe8 6. a3 Rad8 > >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
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