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
This page took 0.01 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.