Author: Uri Blass
Date: 16:15:52 01/04/02
Go up one level in this thread
On January 04, 2002 at 18:58:34, Uri Blass wrote: >On January 04, 2002 at 17:35:01, Gian-Carlo Pascutto wrote: > >>Bleh! Sjeng sees that Nxb5 loses in a few seconds, but it does >>not find any better move! >> >>The score for Nxb5 is now -1.2 or so and Sjeng does not >>fail high on the other moves, so it would still play it >>after more than 10 minutes thought. > >After Nxb5 Rf5 the advantage of black >is clearly bigger than +1.2 > >+1.2 is not a winning advantage and after Nxb5 tiger saw +4 > >I believe that one of >Ne4 or g3(the move that tiger expected) or Re1 >are better(I am not sure if they save the game but they should be better from >computer point of view) > >Everything seems to avoid Nxb5 after enough time and I expect sjeng to play a >different move if you give it enough time. > > >Here is yace's opinion > >after 1.g3 > >New position >8/5rbk/6q1/1p1Q4/1PpP2p1/2N2pP1/5P2/3R2K1 b - - 0 1 > >Analysis by Yace 0.99.56: > >1...Rf5 2.Qe4 > ³ (-0.46) Depth: 3 00:00:00 >1...Rf5 2.Qd7 Qh5 > ³ (-0.61) Depth: 3 00:00:00 >1...Rf5 2.Qd7 Qh5 > ³ (-0.61) Depth: 3 00:00:00 >1...Rf5 2.Qd7 Qh5 > ³ (-0.61) Depth: 3 00:00:00 >1...Rf5 2.Qd7 Qh5 3.Re1 > ³ (-0.49) Depth: 4 00:00:00 >1...Rf5 2.Qd7 Qh5 3.Re1 Rg5 > ³ (-0.46) Depth: 5 00:00:00 3kN >1...Qf5 2.Qxb5 Qxb5 3.d5 Qxd5 4.Rxd5 > ³ (-0.47) Depth: 5 00:00:00 5kN >1...Qf5 2.Qxb5 Qxb5 3.Nxb5 Rb7 4.Nc3 > ³ (-0.61) Depth: 5 00:00:00 5kN >1...Qf5 2.Qxb5 Qxb5 3.Nxb5 Rb7 4.Nc3 Rxb4 > ³ (-0.61) Depth: 6 00:00:00 14kN >1...Qf5 2.Qxb5 Qxb5 3.Nxb5 Rb7 4.Nc3 Rxb4 5.Kf1 > ³ (-0.56) Depth: 7 00:00:00 35kN >1...Qf5 2.Qxb5 Qxb5 3.Nxb5 Rb7 4.Nd6 Rxb4 5.Nf5 c3 6.Nxg7 > ³ (-0.65) Depth: 8 00:00:00 154kN >1...Qf5 2.Qxb5 Qxb5 3.Nxb5 Rb7 4.Nd6 Rxb4 5.Nf5 Bf6 6.d5 c3 > ³ (-0.67) Depth: 10 00:00:02 1183kN >1...Rf5 2.Qb7 Rh5 3.Nxb5 Qh6 4.Qe4+ Kg8 5.Qxg4 Rxb5 6.Qc8+ Kh7 7.d5 Qg5 8.Qxc4 > ³ (-0.68) Depth: 10 00:00:04 1603kN >1...Rf5 2.Qb7 Rh5 3.Ra1 Qh6 4.Qe4+ Kh8 5.Ra8+ Bf8 6.Rxf8+ Qxf8 7.Qxg4 Qf7 8.Kf1 > µ (-0.93) Depth: 10 00:00:05 2014kN >1...Rf5 2.Qe4 Rh5 3.Re1 Qxe4 4.Rxe4 Bf8 5.Re5 Rxe5 6.dxe5 Bxb4 7.Nxb5 c3 > µ (-0.99) Depth: 11 00:00:08 3639kN >1...Rf5 2.Qe4 Rh5 3.Re1 Qxe4 4.Rxe4 Bf8 5.Re5 Kg6 6.Rxb5 Rxb5 7.Nxb5 Bxb4 > µ (-0.97) Depth: 12 00:00:14 5789kN >1...Rf5 2.Qe4 Rh5 3.Re1 Qxe4 4.Rxe4 Bf8 5.Re5 Kg6 6.Rc5 Bxc5 7.dxc5 Kf5 8.Nxb5 >Ke5 > µ (-0.91) Depth: 13 00:00:28 11708kN >1...Rf5 2.Qe4 Rh5 3.Re1 Qxe4 4.Rxe4 Bf8 5.Rxg4 Bxb4 6.Ne4 Kh6 7.Rf4 Rd5 8.Rxf3 >Rxd4 9.Rf6+ Kg7 > µ (-1.02) Depth: 14 00:01:10 28264kN > >(Blass, Tel-aviv 05.01.2002) > >After Nb5 Rf5 yace fails low again and again and >I did not give it enough time to finish depth 12 > >New position >[D]8/6bk/6q1/1N1Q1r2/1PpP2p1/5p2/5PP1/3R2K1 w - - 0 1 > >Analysis by Yace 0.99.56: > >2.Qxf5 Qxf5 > -+ (-4.40) Depth: 1 00:00:00 >2.Qxc4 > +- (1.80) Depth: 1 00:00:00 >2.Qxc4 Rh5 > +- (1.49) Depth: 2 00:00:00 >2.Qxc4 Rh5 3.Kf1 > +- (1.70) Depth: 3 00:00:00 >2.Qxc4 Qb6 3.Nc3 Rh5 > +- (1.48) Depth: 4 00:00:00 >2.Qxc4 g3 3.gxf3 Rxf3 4.fxg3 Rxg3+ 5.Kf1 > +- (1.50) Depth: 5 00:00:00 17kN >2.Qxc4 g3 3.gxf3 Rxf3 4.Rb1 Qxb1+ 5.Kg2 > ± (1.10) Depth: 6 00:00:00 31kN >2.Qxc4 g3 3.gxf3 Rxf3 4.Qc1 Rxf2 5.Kh1 > ² (0.28) Depth: 6 00:00:00 31kN >2.Qd7 Rxb5 3.Qxb5 fxg2 > ² (0.29) Depth: 6 00:00:00 31kN >2.Qd7 Rh5 3.Qc8 Rxb5 4.gxf3 > ² (0.28) Depth: 6 00:00:00 31kN >2.Qxc4 g3 3.gxf3 Rxf3 4.Qc1 Rxf2 5.Kh1 > ² (0.28) Depth: 6 00:00:00 31kN >2.Qxc4 g3 3.gxf3 Rxf3 4.Kf1 Rxf2+ 5.Kg1 Qf5 6.Rc1 > = (0.19) Depth: 7 00:00:00 312kN >2.Qxc4 Qh5 3.Qc2 g3 4.gxf3 gxf2+ 5.Qxf2 Rxb5 6.Qc2+ Kg8 > = (-0.17) Depth: 8 00:00:03 1074kN >2.Qxc4 Qh5 3.Qc2 g3 4.gxf3 gxf2+ 5.Qxf2 Rxb5 6.Kf1 Qh3+ 7.Qg2 Qxg2+ 8.Kxg2 Kg6 >9.d5 > ³ (-0.32) Depth: 9 00:00:07 2273kN >2.Qxc4 Qh5 3.Qc2 g3 4.gxf3 gxf2+ 5.Qxf2 Rg5+ 6.Kf1 Qh3+ 7.Qg2 Rxg2 8.Ke1 > µ (-0.72) Depth: 10 00:00:11 4155kN >2.Qxc4 g3 3.gxf3 Rxf3 4.Kg2 Qe4 5.Kg1 gxf2+ 6.Kf1 Qc2 7.Qxc2+ Kg8 > -+ (-1.43) Depth: 10 00:00:32 11453kN >2.Qxc4 g3 3.gxf3 Qh5 4.fxg3 Qxf3 5.Qc2 Qxg3+ 6.Kh1 Qg6 7.Qh2+ Rh5 8.Na3 Rxh2+ >9.Kxh2 > -+ (-1.83) Depth: 11 00:00:49 17447kN >2.Qxc4 Qh5 3.g3 Qh3 4.Qf1 Qxf1+ 5.Kxf1 Rh5 6.Kg1 Rxb5 7.d5 Rxb4 8.d6 Rd4 9.Rxd4 > -+ (-2.61) Depth: 11 00:01:17 26933kN >2.Qxc4 g3 3.gxf3 Qh5 4.fxg3 Qxf3 5.Qc2 Qxg3+ 6.Kh1 Qf3+ 7.Kg1 Kg8 8.Nd6 Qg3+ >9.Qg2 Qe3+ 10.Kh2 Rh5+ 11.Qh3 Rxh3+ 12.Kg2 > -+ (-3.01) Depth: 12 00:03:17 68881kN >2.Qxc4 g3 3.gxf3 Rxf3 4.Kg2 Qe4 5.Kg1 gxf2+ 6.Kf1 Qg6 7.Qd3 Rxd3 8.Kxf2 > -+ (-4.01) Depth: 12 00:03:57 81979kN >2.Qxc4 g3 3.fxg3 f2+ 4.Kf1 Qh5 5.Qd3 Qh1+ 6.Ke2 f1Q+ 7.Rxf1 Qxf1+ 8.Kd2 Qxd3+ >9.Kxd3 Rxb5 10.Kc4 Rg5 11.d5 Rxg3 > -+ (-5.02) Depth: 12 00:05:27 112849kN > >(Blass, Tel-aviv 05.01.2002) > > >Uri after finishing depth 12 here is yace's line 2.Qe4 Rxb5 3.Qe1 Bf8 4.d5 Rxb4 5.Qe6 c3 6.Qd7+ Kg8 7.Qc6 Qc2 8.Qe6+ Kg7 -+ (-4.02) Depth: 12 00:17:44 381827kN (Blass, Tel-aviv 05.01.2002) yace agrees that Nxb5 is losing more than 4 pawns when other moves do not lose so much. g3 was only one example and yace believes that black advantage is less than 1 pawn after a move like Ne4 that seems better than g3 to me(only 0.61 pawns after some minutes) Uri
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