Author: Uri Blass
Date: 21:10:46 10/12/05
Go up one level in this thread
On October 12, 2005 at 23:56:37, Aloisio Ponti Lopes wrote: >[D] 2r2bk1/2rn1bpp/2nN1p2/p1Pp4/B2p4/P4N1P/3B1PP1/2RR2K1 b - - 0 29 > >wKg1,Nd6,f3,Ba4,d2,Rc1,d1,Pa3,c5,f2,g2,h3/bKg8,Nc6,d7,Bf7,f8,Rc7,c8,Pa5,d4,d5,f6,g7,h7 > >This is alson an internet game against another computer. >In this position Shredder picks very quickly 29... Nxc5 and evals equality. >Surprisinly Toga 1.0 played 29....Nde5 and lost the game in the endgame (bishop >x rook with pawns for both sides). > >When I open Toga 1.0 analysing with FritzGUI I get this: > >New game, >2r2bk1/2rn1bpp/2nN1p2/p1Pp4/B2p4/P4N1P/3B1PP1/2RR2K1 b - - 0 1 > >Analysis by Toga II 1.0: > >29...Nxc5 30.Nxc8 Nxa4 > µ (-0.76) Depth: 1/2 00:00:00 >29...Nxc5 30.Nxc8 Nxa4 > µ (-0.76) Depth: 2/14 00:00:00 >29...Nxc5 30.Nxc8 Nxa4 > µ (-0.76) Depth: 2/14 00:00:00 >29...Nxc5 30.Nxc8 Nxa4 > µ (-0.76) Depth: 2/14 00:00:00 >29...Nxc5 30.Nxc8 Nxa4 > µ (-0.76) Depth: 3/14 00:00:00 >29...Nxc5 30.Nxc8 Nxa4 31.Nxd4 > ² (0.48) Depth: 4/18 00:00:00 >29...Ra8 30.Nxf7 Kxf7 31.Bf4 Nde5 32.Nxd4 Nxd4 33.Rxd4 Rxc5 34.Rxc5 Bxc5 35.Rxd5 > = (0.14) Depth: 4/18 00:00:00 >29...Ra8 30.Nxf7 Kxf7 31.Bf4 Nde5 32.Nxd4 Nxd4 33.Rxd4 Rxc5 34.Rxc5 Bxc5 35.Rxd5 > = (0.14) Depth: 5/18 00:00:00 >29...Ra8 30.Nxf7 Kxf7 31.Bf4 Nde5 32.Nxd4 Nxd4 33.Rxd4 Rxc5 34.Rxc5 Bxc5 35.Rxd5 > = (0.14) Depth: 6/19 00:00:00 40kN >29...Nxc5 30.Nxc8 Nxa4 31.Nxd4 Bc5 32.Nxc6 Rxc6 > = (-0.13) Depth: 6/19 00:00:00 49kN >29...Nxc5 30.Nxc8 Nxa4 31.Nxd4 Nc5 32.Nxc6 Rxc6 33.Na7 > = (-0.08) Depth: 7/19 00:00:00 69kN >29...Nxc5 30.Nxc8 Nxa4 31.Nxd4 Nc5 32.Nxc6 Rxc6 33.Na7 Rc7 > = (-0.08) Depth: 8/19 00:00:00 103kN >29...Nxc5 30.Nxc8 Nxa4 31.Nxd4 Be8 32.Na7 Rxa7 33.Nxc6 Bxc6 34.Rxc6 Bxa3 > = (0.09) Depth: 9/20 00:00:00 183kN >29...Nde5 30.Nxc8 Rxc8 31.Nxe5 Nxe5 32.Kf1 Nc4 33.Bf4 Bxc5 34.Bd7 Rd8 > = (-0.22) Depth: 9/24 00:00:00 556kN >29...Nde5 30.Nxc8 Rxc8 31.Nxe5 Nxe5 32.Bb5 Nc4 33.c6 Bxa3 34.Ra1 Bh5 35.Re1 > = (0.03) Depth: 10/24 00:00:00 881kN >29...Nde5 30.Nxc8 Rxc8 31.Nxe5 Nxe5 32.Bb5 Nc4 33.c6 Bxa3 34.Ra1 Bb2 35.Rxa5 >Nxa5 36.Bxa5 Bc3 > = (-0.07) Depth: 11/24 00:00:01 1591kN >29...Nde5 30.Nxc8 Rxc8 31.Nxe5 Nxe5 32.Bb5 Nc4 33.c6 Bxa3 34.Ra1 Bc5 35.Bxa5 Be8 >36.Bxc4 dxc4 > = (0.09) Depth: 12/25 00:00:02 2838kN >29...Nde5 30.Nxc8 Rxc8 31.Bxc6 Nxf3+ 32.gxf3 Rxc6 33.Bxa5 Rxc5 34.Bb4 Rxc1 >35.Rxc1 Be6 36.Kg2 d3 37.Rc7 d4 > = (-0.03) Depth: 13/29 00:00:06 6189kN >29...Nde5 30.Nxc8 Rxc8 31.Bxc6 Nxf3+ 32.gxf3 Rxc6 33.Bxa5 Rxc5 34.Bb4 Rxc1 >35.Rxc1 Be6 36.Kg2 d3 37.Rc7 d4 38.Kg3 > = (0.01) Depth: 14/31 00:00:09 9755kN >29...Nde5 30.Nxc8 Rxc8 31.Bxc6 Nxf3+ 32.gxf3 Rxc6 33.Bxa5 Rxc5 34.Rxc5 Bxc5 >35.Bb4 Ba7 36.Rc1 Be6 37.Rc7 Bb8 38.Re7 Bf7 > = (0.08) Depth: 15/32 00:00:16 16792kN >29...Nde5 30.Nxc8 Rxc8 31.Bxc6 Nxf3+ 32.gxf3 Rxc6 33.Bxa5 Rxc5 34.Rxc5 Bxc5 >35.Bb4 Ba7 36.Rc1 Be6 37.Rc7 Bb8 38.Re7 Bf7 39.a4 > ² (0.36) Depth: 16/32 00:00:29 30260kN >29...Nxc5 30.Nxc8 Nxa4 31.Nxd4 Nb2 32.Re1 Nc4 33.Nxc6 Rxc6 34.Ne7+ Bxe7 35.Rxe7 >Re6 36.Rxe6 Bxe6 37.Bc3 a4 38.Re1 Kf7 39.Bb4 > ² (0.30) Depth: 16/32 00:00:37 38175kN >29...Ra8 30.Nxf7 Kxf7 31.Bf4 Nce5 32.Bb3 Nxf3+ 33.Kf1 Rxc5 34.Rxc5 Nxc5 35.Bxd5+ >Ne6 36.Bxa8 Nxf4 37.Bxf3 Bc5 38.Be4 g6 39.Ke1 > = (0.21) Depth: 16/38 00:01:27 88817kN >--------------------------------------- > >Well it seems to me that Shredder's middlegame knowledge is superior than >Fruit-Toga's knowledge... am I wrong? > >A. Ponti It is wrong to get that conclusion from a single position. It seems that Shredder has bigger evaluation for exchange advantage. sometimes it help shredder to play better but sometimes it is the opposite please see the following position Fruit had no problem to find the exchange sacrifice when Shredder or Fritz have problems. http://www.talkchess.com/forums/1/message.html?454193 Uri
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