Author: John Merlino
Date: 12:26:16 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 > >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 CM_SKR on an AMD 2500+ also says Qxd5: Time Depth Score Positions Moves 0:00 1/6 -0.74 16644 1...Qxd5 2.Nc3 Qa5 3.Ne4 Be7 4.Qd2 0:00 1/3 -0.57 581 1...Qxd5 2.Nc3 Qa5 3.Ne4 0:00 1/4 -0.84 1277 1...Qxd5 2.Nc3 Qa5 3.Ne4 Be7 0:00 1/5 -0.61 6160 1...Qxd5 2.Nc3 Qa5 3.Ne4 Be7 4.c3 0:00 1/6 -0.74 16644 1...Qxd5 2.Nc3 Qa5 3.Ne4 Be7 4.Qd2 0:00 1/7 -0.56 60949 1...Qxd5 2.Nc3 Qa5 3.Ne4 Be7 4.Qd2 Qb6 5.c3 0:00 1/8 -0.71 119059 1...Qxd5 2.c4 Qa5 3.Nc3 Qb6 4.Qd2 Be6 5.Nd5 Bxd5 6.cxd5 0:01 1/9 -0.55 294086 1...Qxd5 2.c4 Qa5 3.Nc3 Be6 4.Qb3 Rab8 5.Nd5 Bxd5 6.cxd5 0:03 1/9 -0.72 636096 1...Nb4 2.Nfd2 Nxd5 3.Ne4 Nf4 4.Nbc3 Be7 5.Bg4 Qd4 6.a3 0:05 1/10 -0.33 1147229 1...Nb4 2.c4 e4 3.dxe4 Bxb2 4.Nbd2 Bxa1 5.Qxa1 Qe7 6.Qb2 Bg4 7.Re1 0:06 1/10 -0.56 1460058 1...Qxd5 2.c4 Qd6 3.Nc3 Bf5 4.Nd5 Rae8 5.Qd2 Nd4 6.Nxd4 exd4 0:13 1/11 -0.54 2925493 1...Qxd5 2.c4 Qa5 3.Nc3 Qb6 4.a3 Be6 5.Na4 Qa5 6.b4 Qa6 7.Nc5 0:28 1/12 -0.57 6274890 1...Qxd5 2.c4 Qd8 3.Nc3 Be7 4.Nd5 Bc5 5.Qb3 a5 6.Qb5 Bd4 7.Rae1 Qd6 1:19 1/13 -0.52 17799915 1...Qxd5 2.c4 Qd6 3.Nc3 Bf5 4.Qb3 b6 5.Nd5 Ne7 6.Rac1 Nxd5 7.cxd5 Rfd8 8.Rfe1 Qxd5 9.Qxd5 Rxd5 10.Rxc7 Bxd3 11.Bxd3 Rxd3 jm
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