Author: Uri Blass
Date: 16:24:25 08/11/02
Go up one level in this thread
On August 11, 2002 at 18:59:28, Telmo Escobar wrote: >On August 11, 2002 at 15:00:59, Uri Blass wrote: > > >>>>[D]r2bk1r1/1p3ppp/p1b1p3/Bp6/4P3/5BP1/PP3P1P/2RR2K1 w q - 0 19 >>>>19.Rxc6! Bxa5 [19...bxc6 20.e5 Bxa5 (20...Ke7?? 21.Bb4+ c5 22.Bxc5+ Ke8 23.Bc6 >>>>Mate!) 21.Bxc6+ returns exchange + pawn] 20.Rcd6, followed by Rd7 etc. >>> >>>19.Rxc6 is easy to find(movei finds it at depth 7 after >>>2 seconds on p850) >>>After 19...Bxa5 the move 20.Rcd6(if it is the only move to win) >>>is a bigger problem and movei prefers 20.e5 with evaluation of >>>0.15 pawns for white at depth 13. >>> >>>Uri >> >>After 19.Rxc6 Bxa5 20.Rcd6 is not winning because of Rd8 when >>Rd7 is impossible so this example only demonstrates pharoan's wealnesses. >> >>Uri > > If 19.Rxc6 Bxa5 20.Rcd6 Rd8 21.e5 I think White has a clear positional >advantage > > Telmo I think that white has no advantage. after 21.e5 I play Rxd6 and black has a small advantage based on Deep Fritz. If exd6 Kd7 and if Rxd6 Bc7 deep fritz give for these diagrams the following ablaysis: New position [D]6r1/1p1k1ppp/p2Pp3/bp6/8/5BP1/PP3P1P/3R2K1 w - - 0 1 Analysis by Deep Fritz: 5.Bxb7! = (-0.19) Depth: 1/3 00:00:00 5.Bxb7! Rb8 ² (0.41) Depth: 1/3 00:00:00 5.Bxb7! ± (0.72) Depth: 2/7 00:00:00 5.Bxb7! Rd8 ± (0.81) Depth: 2/7 00:00:00 5.Bxb7 Rd8 6.Bxa6 Rb8 ± (0.81) Depth: 3/7 00:00:00 5.Bxb7 Bb4 6.Bxa6 Bxd6 7.Bxb5+ ± (0.91) Depth: 4/9 00:00:00 1kN 5.Bxb7-- ² (0.59) Depth: 5/10 00:00:00 1kN 5.Bxb7-- Rb8 6.Bf3 Rb6 7.Bh5 Rxd6 = (-0.22) Depth: 5/12 00:00:00 3kN 5.h3! = (-0.19) Depth: 5/12 00:00:00 3kN 5.h3! Bb4 6.Bxb7 Bxd6 = (0.09) Depth: 5/12 00:00:00 4kN 5.a3! = (0.13) Depth: 5/12 00:00:00 5kN 5.a3! Rc8 6.Bxb7 Rc2 = (0.16) Depth: 5/12 00:00:00 7kN 5.a3 Rc8 6.Bxb7 Rc2 7.Kg2 Bb6 8.b4 = (0.13) Depth: 6/11 00:00:00 10kN 5.a3 Bb6 6.Bxb7 Rb8 7.Bxa6 Bc5 8.h3 Bxd6 = (0.22) Depth: 7/13 00:00:00 25kN 5.a3 b4 6.Bxb7 Rb8 7.Bxa6 Rb6 8.Bd3 Rxd6 9.h3 b3 10.Kg2 = (-0.03) Depth: 8/16 00:00:00 63kN 5.a3 b4 6.a4 Rb8 7.h3 b5 8.axb5 Rxb5 9.Be4 g6 10.b3 = (-0.06) Depth: 9/19 00:00:00 158kN 5.a3 b4 6.Bxb7 Rb8 7.Bxa6 Rb6 8.Bd3 Rxd6 9.h3 b3 10.Kg2 = (-0.06) Depth: 10/20 00:00:00 347kN 5.a3 b4 6.Bxb7 Rb8 7.Bxa6 Rb6 8.Bd3 Rxd6 9.h3 b3 10.Kg2 = (-0.06) Depth: 11/26 00:00:01 701kN 5.a3 b4 6.Bxb7 Rb8 7.Bxa6 Rb6 8.Bd3 Rxd6 9.h3 b3 10.Kg2 g6 = (-0.03) Depth: 12/25 00:00:02 1235kN 5.a3 Bb6 6.b4 Ba7 7.h3 Rc8 8.Kg2 Rc2 9.Bxb7 Rxf2+ 10.Kh1 e5 = (-0.09) Depth: 13/28 00:00:05 3229kN 5.a3 Rc8 6.Rd3 Bb6 7.Bxb7 Rc2 8.b4 Bxf2+ 9.Kf1 e5 10.Bxa6 Bd4 ³ (-0.28) Depth: 14/29 00:00:19 12244kN 5.a3 Rc8 6.Rd3 Bb6 7.Bxb7 Rc1+ 8.Kg2 Rc2 9.b4 Rxf2+ 10.Kh3 a5 ³ (-0.37) Depth: 15/31 00:00:45 28136kN 5.a3 Rc8 6.Rd3 Bd8 7.b4 Bf6 8.Bxb7 Rb8 9.Be4 Rb6 10.Bxh7 ³ (-0.44) Depth: 16/32 00:02:21 88987kN (blass, tel-aviv 12.08.2002) New position 4k1r1/1pb2ppp/p2Rp3/1p2P3/8/5BP1/PP3P1P/6K1 w - - 0 1 Analysis by Deep Fritz: 5.Rxa6-- -+ (-3.66) Depth: 1/3 00:00:00 5.Rxa6-- bxa6 -+ (-4.56) Depth: 1/3 00:00:00 5.Rxe6+! -+ (-4.47) Depth: 1/3 00:00:00 5.Rxe6+! fxe6 -+ (-4.03) Depth: 1/9 00:00:00 5.Bxb7! -+ (-2.00) Depth: 1/9 00:00:00 5.Bxb7! Bxd6 µ (-1.28) Depth: 1/9 00:00:00 5.Rd3! µ (-0.91) Depth: 1/9 00:00:00 5.Rd3 Bxe5 6.Bxb7 µ (-0.91) Depth: 2/6 00:00:00 5.Rd3 Bxe5 6.Bxb7 µ (-0.91) Depth: 3/8 00:00:00 5.Rd3 Bxe5 6.Bxb7 Bxb2 7.Bxa6 µ (-0.91) Depth: 4/10 00:00:00 5.Rd2! µ (-0.87) Depth: 4/10 00:00:00 5.Rd2! Bxe5 6.Bxb7 Ke7 7.Bxa6 ³ (-0.31) Depth: 4/11 00:00:00 1kN 5.Rd2 Bxe5 6.Bxb7 Ke7 7.Bxa6 ³ (-0.31) Depth: 5/11 00:00:00 3kN 5.Rd2 Ke7 6.Bxb7 Rb8 7.Bxa6 Bxe5 ³ (-0.28) Depth: 6/13 00:00:00 9kN 5.Rd2 Ke7 6.Bxb7 Rb8 7.Bxa6 Rb6 8.Bc8 Bxe5 ³ (-0.31) Depth: 7/13 00:00:00 17kN 5.Rd2 Ke7 6.Bxb7 Bxe5 7.f4 Bf6 8.Bxa6 Ra8 ³ (-0.28) Depth: 8/19 00:00:00 31kN 5.Rd2 Bxe5 6.Bxb7 Ke7 7.f4 Bf6 8.Bxa6 Ra8 9.Bxb5 Rxa2 ³ (-0.56) Depth: 9/19 00:00:00 97kN 5.Rd2 Bxe5 6.Bxb7 Ke7 7.Bxa6 Ra8 8.Bxb5 Rxa2 9.Rd7+ Kf6 10.b4 ³ (-0.47) Depth: 10/21 00:00:00 207kN 5.Rd2 Ke7 6.Re2 Rb8 7.Kg2 b4 8.h3 b3 9.a3 b6 10.Bc6 ³ (-0.34) Depth: 11/24 00:00:00 492kN 5.Rd2 Ke7 6.Bxb7 Rb8 7.Bxa6 Rb6 8.Bc8 Bxe5 9.f4 Rd6 10.Rxd6 Bxd6 ³ (-0.37) Depth: 12/23 00:00:01 967kN 5.Rd2 Ke7 6.Bxb7 Rb8 7.Bxa6 Rb6 8.Bc8 Bxe5 9.f4 Rd6 10.Rxd6 Bxd6 ³ (-0.37) Depth: 13/25 00:00:02 1866kN 5.Rd2 Bxe5 6.Bxb7 Ke7 7.f4 Bf6 8.Bxa6 Rb8 9.h3 Rb6 10.Bc8 Rd6 ³ (-0.47) Depth: 14/27 00:00:09 6343kN 5.Rd2 Bxe5 6.Bxb7 Ke7 7.f4 Bf6 8.Bxa6 Rb8 9.Kf2 Rb6 10.Bc8 Rd6 ³ (-0.41) Depth: 15/30 00:00:18 12454kN 5.Rd2 Bxe5 6.Bxb7 Ke7 7.f4 Bf6 8.Bxa6 Rb8 9.Rc2 Bd4+ 10.Kf1 Rb6 ³ (-0.34) Depth: 16/36 00:00:40 26006kN 5.Rd2 Bxe5 6.Bxb7 Ke7 7.f4 Bf6 8.Bxa6 Rb8 9.a3 Rb6 10.Bc8 Rd6 ³ (-0.37) Depth: 17/33 00:01:36 62432kN (blass, tel-aviv 12.08.2002) Uri
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