Author: Uri Blass
Date: 23:49:30 10/05/01
Go up one level in this thread
On October 06, 2001 at 01:58:21, Ernst Walet wrote: >On October 05, 2001 at 15:53:32, Uri Blass wrote: > >>I think that yace blundered by 20...Bd7 >> >>Here is Deep Fritz's analysis >>Deep Fritz needs some hours on p800 to avoid 20...Bd7 >> >>I suspect that only material evaluation can find that 20...Bd7 is losing a pawn >>when 20...h6 and it may be interesting to see if I am right. >> >> >>Zarkov4.5T - Yace >>[D]1nr1rbk1/qp3ppp/4b3/pQ1pPpB1/N2P4/P1R2N2/1P3PPP/4R1K1 b - - 0 1 >> >>Uri > >After eight and a half hour and completing 17 ply Shredder 5.32 cannot find an >alternative to Bd7. > >Ernst. > >New position >1nr1rbk1/qp3ppp/4b3/pQ1pPpB1/N2P4/P1R2N2/1P3PPP/4R1K1 b - - 0 1 > >Analysis by Shredder 5.32: > >1...Rxc3 2.bxc3 > ² (0.49) Depth: 1/2 00:00:00 >1...Rxc3 2.Nxc3 > ± (0.86) Depth: 1/2 00:00:00 >1...Nd7 2.Rxc8 Rxc8 > ² (0.68) Depth: 1/2 00:00:00 >1...Nd7 2.Rxc8 Rxc8 > ² (0.35) Depth: 1/2 00:00:00 >1...Nc6 2.Qxc6 Rxc6 3.Rxc6 > ² (0.33) Depth: 1/2 00:00:00 >1...Nc6 2.Qxc6 Rxc6 3.Rxc6 > = (0.06) Depth: 1/2 00:00:00 >1...Nc6 2.Nb6 > ² (0.34) Depth: 2/4 00:00:00 >1...Nc6 2.Nb6 > ² (0.34) Depth: 2/4 00:00:00 >1...Bd7 2.Rc6 > ² (0.33) Depth: 2/4 00:00:00 >1...Bd7 2.Qb3 > = (0.22) Depth: 2/4 00:00:00 >1...Qa6 2.Rce3 > = (0.20) Depth: 2/4 00:00:00 >1...Qa6 2.Qxa6 Nxa6 > = (0.18) Depth: 2/4 00:00:00 >1...Qa6 2.Qxa6 Nxa6 3.Rec1 > = (0.21) Depth: 3/6 00:00:00 >1...Qa6 2.Qxa6 Nxa6 3.Rxc8 Rxc8 4.Nb6 > = (0.23) Depth: 4/8 00:00:00 >1...Qa6 2.Qb3 b5 3.Rxc8 Rxc8 4.Nc3 > = (0.22) Depth: 5/10 00:00:00 >1...Qa6 2.Qb3 h6 3.Rxc8 Rxc8 4.Nb6 hxg5 5.Nxc8 Bxc8 6.Qxd5 > ² (0.27) Depth: 6/12 00:00:01 23kN >1...Bd7 2.Qb3 b5 3.Bd2 > ² (0.26) Depth: 6/12 00:00:01 32kN >1...Bd7 2.Qb3 b5 3.Rxc8 bxa4 4.Qxb8 Qxb8 5.Rxb8 Rxb8 > = (-0.02) Depth: 6/12 00:00:01 39kN >1...Bd7 2.Qb6 Qxb6 3.Nxb6 Rxc3 4.bxc3 Bxa3 5.Ra1 Bb2 6.Rxa5 Bxc3 7.Rxd5 > = (0.01) Depth: 7/14 00:00:01 72kN >1...Bd7 2.Qb6 Qxb6 3.Nxb6 Rxc3 4.bxc3 Bc6 5.c4 Bxa3 6.cxd5 Bb5 > = (0.04) Depth: 8/16 00:00:02 183kN >1...Bd7 2.Qb3 b5 3.Nc5 Bxc5 4.Rxc5 Rxc5 5.dxc5 Qxc5 6.Rc1 Qb6 7.Qxd5 > = (0.18) Depth: 9/18 00:00:05 542kN >1...Bd7 2.Qxd5 h6 3.Rxc8 Rxc8 4.e6 hxg5 5.exd7 Qxd4 6.dxc8Q > ² (0.43) Depth: 10/20 00:00:12 1339kN >1...Bd7 2.Qxd5 Bc6 3.Qb3 b5 4.Nc5 Bxf3 5.Rxf3 Nc6 6.Be3 Nxd4 7.Bxd4 Bxc5 8.Bxc5 >Qxc5 9.Rxf5 > ² (0.54) Depth: 10/20 00:00:17 1917kN >1...Bd7 2.Qxd5 Bc6 3.Qb3 b5 4.Nc5 Bxf3 5.Rxf3 Nc6 6.Be3 Nxd4 7.Bxd4 Bxc5 8.Bxc5 >Qxc5 9.Rxf5 > ² (0.54) Depth: 11/22 00:00:39 4320kN >1...Bd7 2.Qxd5 Bc6 3.Qb3 b5 4.Nc5 Bxf3 5.Rxf3 Bxc5 6.dxc5 Rxc5 7.Rxf5 Qd7 8.Qf3 > ² (0.53) Depth: 12/24 00:01:24 9530kN >1...h6 2.Rxc8 Rxc8 3.Nb6 Rc2 4.Be3 Qa6 5.Qb3 Rc6 6.h3 Qxb6 7.Ng5 > ² (0.52) Depth: 12/24 00:01:57 13208kN >1...h6 2.Rxc8 Rxc8 3.Nb6 Rc2 4.Bd2 Nc6 5.Rd1 a4 6.Be3 Qa6 7.Qxa6 bxa6 8.Rc1 >Rxc1+ 9.Bxc1 Be7 10.Nxa4 > ² (0.50) Depth: 12/24 00:02:05 14450kN >1...h6 2.Bd2 Rxc3 3.Nxc3 Rd8 4.Na4 Nc6 5.Nb6 Be7 6.h3 Bf8 > ² (0.57) Depth: 13/26 00:04:21 30426kN >1...Bd7 2.Qxd5 Bc6 3.Qb3 b5 4.Nc5 Bxf3 5.Rxf3 Bxc5 6.dxc5 Rxc5 7.Qc4 > ² (0.56) Depth: 13/26 00:04:47 33454kN >1...Bd7 2.Qxd5 Bc6 3.Qb3 b5 4.Nc5 Bxf3 5.Rxf3 Bxc5 6.dxc5 Rxc5 7.Rxf5 Qd7 8.Qf3 > ² (0.26) Depth: 13/26 00:05:54 41160kN >1...Bd7 2.Qxd5 Bc6 3.Qb3 b5 4.Nc5 Bxf3 5.Rxf3 Bxc5 6.dxc5 Rxc5 7.e6 Rxe6 8.g3 > = (0.24) Depth: 14/28 00:09:48 67252kN >1...Bd7 2.Qxd5 Bc6 3.Qb3 b5 4.Nc5 Bxf3 5.Rxf3 Nc6 6.Be3 Nxd4 7.Bxd4 Bxc5 8.Bxc5 > ² (0.42) Depth: 15/30 00:21:14 143756kN >1...Bd7 2.Qxd5 Bc6 3.Qb3 b5 4.Nc5 Bxf3 5.Rxf3 Nc6 6.Be3 Nxd4 7.Bxd4 Bxc5 8.Bxc5 >Rxc5 9.e6 fxe6 > = (0.17) Depth: 16/32 01:37:42 649602kN >1...Bd7 2.Qb3 Qa6 3.Qc2 Rxc3 4.Nxc3 Be6 > = (0.17) Depth: 16/32 02:26:59 970297kN >1...Bd7 2.Qxd5 Bc6 3.Qb3 b5 4.Nc5 Bxf3 5.Rxf3 Nc6 6.Be3 Nxd4 7.Bxd4 Bxc5 8.Bc3 >Qd7 > ² (0.41) Depth: 17/34 05:54:30 2343171kN > >(PIII-500E, 192MB hash, 3 and 4 piece EGTB's, 06.10.2001) Thanks for the anlaysis. Note that Deep Fritz needed depth 18 to avoid Bd7 You may try to give it the position after Bd7 Qxd5 in order to see if it can see big problems for black. I already did it in my p800 with Deep Fritz but I have no access for it now so I may give a long analysis later. Uri Uri
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