Author: Uri Blass
Date: 14:40:33 10/15/05
Go up one level in this thread
On October 15, 2005 at 17:05:47, Joachim Rang wrote: >On October 15, 2005 at 16:40:42, Uri Blass wrote: > >>I played a blitz game. >> >>I did not play well in the opening and got the following position >>It was obvioud for me that I have to play Ne8 >> >>surprisingly Fruit default never considers that move and prefer sacrificing a >>piece for 2 pawns. >> >>I wonder if the sacrifice is good. >>This sacrifice also change my opinion about fruit and now I am not sure if >>increasing the value of pawns and pawn structure to 102 is really productive for >>fruit. >> >>I thought that it should evaluate pawns more but it seems that fruit evaluate >>pawns too much here(otherwise I do not udnerstand how it can give black the >>advantage at small depth). >> >>6...Nxd4 7.Qd3 Bc5 8.exf6 Qxf6 >> ³ (-0.59) Depth: 3/11 00:00:00 >> >> >>Note that it is possible that my evaluation is wrong and fabien has better >>evaluation function than my knowledge. >> >>I am also interested in your opinion about the position. >> >>What is the best practical chance of black? >>6...Ne8 based on my human knowlede or 6...d5 based on fruit's choice when fruit >>even does not expect white to play the obvious exf6. >> >>1161: SpriD - Uri_Blass, Rated game, 5m + 0s 2005 >>[D]r1bq1rk1/pppp1ppp/2n1pn2/4P3/1bPP4/2N5/PPQ2PPP/R1B1KBNR b KQ - 0 1 >> >>Analysis by Fruit 2.2: >> >>6...Nxd4 >> -+ (-2.17) Depth: 1/5 00:00:00 >>6...Nxd4 7.Qd3 >> -+ (-2.59) Depth: 2/11 00:00:00 >>6...Nxd4 7.Qd3 Bc5 8.exf6 Qxf6 >> ³ (-0.59) Depth: 3/11 00:00:00 >>6...Nxd4 7.Qd3 Bc5 8.exf6 Qxf6 >> ³ (-0.59) Depth: 4/11 00:00:00 >>6...Nxd4 7.Qd3 Nf5 8.exf6 Qxf6 9.Nf3 >> = (0.09) Depth: 5/16 00:00:00 >>6...Ng4 7.Nf3 f5 8.Bf4 b6 >> ³ (-0.31) Depth: 5/16 00:00:00 >>6...Ng4 7.Nf3 Be7 8.Bd3 f5 9.0-0 >> = (0.09) Depth: 6/19 00:00:00 42kN >>6...d5 7.Nf3 Ne4 8.Bd3 f5 9.exf6 Nxf6 >> ³ (-0.28) Depth: 6/22 00:00:00 90kN >>6...d5 7.exf6 Nxd4 8.Qd1 Qxf6 9.Nf3 Nxf3+ 10.Qxf3 Qe5+ 11.Be2 dxc4 >> = (0.04) Depth: 7/22 00:00:00 125kN >>6...Nxd4 7.Qd3 Nc6 8.exf6 Ne5 9.Qd4 Qxf6 >> = (0.01) Depth: 7/22 00:00:00 146kN >>6...Nxd4 7.Qd3 Nc6 8.exf6 Ne5 9.Qe4 Qxf6 10.Nf3 >> = (0.14) Depth: 8/22 00:00:00 214kN >>6...d5 7.exf6 Nxd4 8.Qd1 Qxf6 9.Nf3 Nxf3+ 10.Qxf3 Qe5+ 11.Be2 dxc4 >> = (0.04) Depth: 8/22 00:00:01 261kN >>6...d5 7.Nf3 Ne4 8.Bd3 f5 9.exf6 Nxf6 10.Bg5 h6 11.Bh7+ Kh8 >> = (0.24) Depth: 9/26 00:00:01 599kN >>6...d5 7.Nf3 Ne4 8.Bd3 f5 9.exf6 Nxf6 10.Bg5 h6 11.cxd5 exd5 12.Bh7+ Kh8 >> = (-0.02) Depth: 10/26 00:00:02 1330kN >>6...d5 7.Nf3 Ne4 8.Bd3 f5 9.exf6 Nxf6 10.Bg5 h6 11.Be3 dxc4 12.Bxc4 Nd5 >> = (0.00) Depth: 11/30 00:00:03 2131kN >>6...d5 7.Nf3 Ne4 8.Bd3 f5 9.exf6 Nxf6 10.cxd5 exd5 11.0-0 Kh8 12.a3 Bd6 13.Re1 >> = (0.15) Depth: 12/30 00:00:06 3992kN >>6...d5 7.Nf3 Ne4 8.Be2 b6 9.cxd5 exd5 10.0-0 Bxc3 11.bxc3 Bg4 12.Bf4 Qd7 13.Rab1 >>Bxf3 14.Bxf3 >> = (0.21) Depth: 13/32 00:00:15 10143kN >>6...d5 7.Nf3 Ne4 8.a3 Bxc3+ 9.bxc3 b6 10.Bd3 Ba6 11.Bxe4 dxe4 12.Qxe4 Na5 13.Ng5 >>g6 14.0-0 Bxc4 15.Qh4 >> ² (0.41) Depth: 14/36 00:00:30 20793kN >>6...Nxd4 7.Qd3 c5 8.exf6 Qxf6 9.Be3 d6 10.0-0-0 Bxc3 11.Qxc3 e5 12.Bd3 Bg4 13.f3 >>Bf5 14.Kb1 Bxd3+ 15.Qxd3 >> ² (0.32) Depth: 14/36 00:00:40 28051kN >>6...Nxd4 7.Qd3 c5 8.exf6 Qxf6 9.Be3 d6 10.0-0-0 Bxc3 11.Qxc3 e5 12.Bd3 Bf5 >>13.Kb1 Qg6 14.g3 Bxd3+ 15.Qxd3 e4 >> ² (0.54) Depth: 15/36 00:01:03 44340kN >>6...d5 7.Nf3 Ne4 8.a3 Bxc3+ 9.bxc3 b6 10.Bd3 Ba6 11.Bxe4 dxe4 12.Qxe4 Na5 13.Ng5 >>g6 14.0-0 Bxc4 15.Qh4 h5 >> ² (0.42) Depth: 15/37 00:01:13 51251kN >>6...d6 7.exf6 Nxd4 8.Qe4 Qxf6 9.Bd3 g6 10.Nge2 Nxe2 11.Kxe2 Bxc3 12.bxc3 Qxc3 >>13.Bd2 Qg7 14.Rhb1 f5 15.Qh4 >> ² (0.27) Depth: 15/37 00:01:40 70293kN >>6...d6 7.exf6 Nxd4 8.Qe4 Qxf6 9.Bd3 g6 10.Nge2 Nxe2 11.Kxe2 Bxc3 12.bxc3 Qxc3 >>13.Bd2 Qa3 14.Rhb1 f5 15.Qd4 e5 >> ² (0.40) Depth: 16/43 00:02:00 84899kN >>6...d6 7.exf6 Nxd4 8.Qe4 Qxf6 9.Bd3 g6 10.Nge2 Nxe2 11.Kxe2 Bxc3 12.bxc3 Qxc3 >>13.Bd2 Qf6 14.h4 e5 15.h5 Bf5 16.Qxb7 Bxd3+ 17.Kxd3 >> ² (0.34) Depth: 17/43 00:03:30 146157kN >>6...d6 7.exf6 Nxd4 8.Qe4 Qxf6 9.Bd3 g6 10.Nge2 Nxe2 11.Kxe2 Bxc3 12.bxc3 Qxc3 >>13.Bd2 Qf6 14.h4 e5 15.Qf3 Qe7 16.Kf1 Rd8 >> ² (0.53) Depth: 18/45 00:06:02 253112kN >>6...d6 7.exf6 Nxd4 8.Qe4 Qxf6 9.Bd3 g6 10.Nge2 Nxe2 11.Kxe2 Bxc3 12.bxc3 Qxc3 >>13.Bd2 Qf6 14.h4 e5 15.Qf3 Qe7 16.Kf1 Rd8 17.Kg1 >> ² (0.56) Depth: 19/55 00:24:28 1018718kN >>6...d5 7.Nf3 Ne4 8.a3 Bxc3+ 9.bxc3 b6 10.cxd5 exd5 11.Bd3 Bf5 12.Ng5 g6 13.Nxe4 >>dxe4 14.Bb5 e3 15.Qa4 exf2+ 16.Kxf2 Na5 17.Rf1 a6 18.Be2 Re8 >> ² (0.43) Depth: 19/55 00:31:13 1292271kN >> >>(, 15.10.2005) > > >indeed an unclear position. After 6...Ne8 white has with 7.Nf3 a very fine game. >Fruit 2.2 gives here +0.66 and Shredder 9 already 1.28. After 6...d5 7.exf6 >black gets at least active pieces and can create some threats against the white >king. However it is not sufficient to achive equality. > >My tests suggest rather to lower the value of a pawn than to increase it but I >don't think we will find a better value than we have right now. > >Joachim Fruit changes it's mind again to 6...d6 at depth 20 but it still does not expect 6...d5 7.exf6 that it obvious line for me. I wonder what stronger humans think about this position. 6...d5 7.Nf3 Ne4 8.a3 Bxc3+ 9.bxc3 b6 10.cxd5 exd5 11.Bd3 Be6 12.0-0 f5 13.Bf4 Kh8 14.Rfe1 Qe7 15.Bb5 Na5 16.h4 a6 17.Bd3 Nc6 ² (0.61) Depth: 20/55 00:47:28 1946837kN 6...d6 7.exf6 Nxd4 8.Qe4 Qxf6 9.Bd3 g6 10.Nge2 Nxe2 11.Kxe2 Bxc3 12.bxc3 Qxc3 13.Bd2 Qg7 14.Rhb1 f5 15.Qh4 Bd7 16.Kf1 Bc6 17.Re1 Qb2 ² (0.60) Depth: 20/61 00:52:07 2142241kN (, 16.10.2005) Uri
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