Author: Dave Gomboc
Date: 06:55:31 05/24/99
Go up one level in this thread
On May 24, 1999 at 07:43:02, Ed Schröder wrote: >REBEL vs GM Rohde (move 23 and 26) > >23. exd4 or Rxb4 > >It has been said that 23.Rxb4 is a better move than 23.exd4 (Rebel's move). >I partly agree but IMO white's position is already lost also after 23.Rxb4. The >fact that computers evaluate the position after Rxb4 with +0.50 or higher is >no promotion for the current state of art of computer chess IMO. I thought Black was winning, but Rxb4 does seem to look good to me. Perhaps this is no promotion for my chess ability either :-), but I'd sure like to see a win. I did give some analysis in a different post. >I had a close look at Rebel's moves 23 and 26. In Rebel7 I removed a "mate- >threat" extension which impact I considered none to zero. However this game >seems to be full of it. When I enable Rebel6's extension again (just one >instruction) Rebel sees all the danger much quicker. So this is basically "if it's my move, but if it was the other guy's move he could checkmate me, extend"? >REBEL 10.5 (as played in the game) >1r1qr2k/1p4pp/3p4/1R1B1p2/1pPp4/4P1Pb/1P3P1P/Q3R1K1 w - - >00:00:04 7.00 0.99 e3xd4 Re8xe1+ Qa1xe1 Qd8-e8 Qe1-d2 f5-f4 Bd5xb7 (2) >00:00:10 8.00 1.05 e3xd4 Re8xe1+ Qa1xe1 Qd8-e8 Qe1xe8+ Rb8xe8 f2-f4 (5) >00:00:44 9.00 1.10 e3xd4 h7-h6 Rb5xb7 Rb8xb7 Bd5xb7 Kh8-h7 Bb7-d5 (11) >00:01:09 10.00 0.83 e3xd4 Rb8-a8 Re1xe8+ Qd8xe8 Qa1-c1 Qe8-e2 Rb5xb7 (47) >00:02:16 11.00 0.83 e3xd4 Rb8-a8 Re1xe8+ Qd8xe8 Qa1-c1 Qe8-e2 Rb5xb7 (81) >00:05:10 12.00 0.60 e3xd4 Rb8-a8 Re1xe8+ Qd8xe8 Qa1-c1 Qe8-e2 Rb5xb7 (219) > >REBEL 10.5 (with the Rebel6 extension) >1r1qr2k/1p4pp/3p4/1R1B1p2/1pPp4/4P1Pb/1P3P1P/Q3R1K1 w - - >00:00:05 7.00 1.01 e3xd4 Re8xe1+ Qa1xe1 Qd8-e8 Qe1-d1 f5-f4 Kg1-h1 (2) >00:00:11 8.00 1.05 e3xd4 Re8xe1+ Qa1xe1 Qd8-e8 Qe1xe8+ Rb8xe8 f2-f4 (6) >00:00:27 9.00 1.02 e3xd4 Rb8-a8 Re1xe8+ Qd8xe8 Qa1-c1 Ra8-a7 Rb5-b6 (12) >00:00:46 10.00 0.83 e3xd4 Rb8-a8 Re1xe8+ Qd8xe8 Qa1-c1 Qe8-e2 Rb5xb7 (30) >00:01:25 11.00 0.00 e3xd4 Rb8-a8 Re1xe8+ Qd8xe8 Qa1-c1 Qe8-e2 Rb5xb7 (69) >00:09:58 11.02 0.50 Rb5xb4 d4xe3 Re1xe3 Re8xe3 f2xe3 h7-h6 Bd5xb7 (120) > >Not that it matters much as black gets the crucial e-file anyway. > >Rebel10.5 needs 15 plies (and 3 hours) to see that 23.exd4 is 0.00, the new >version 11 plies (and 1 minute). I think I will keep the change :-) And hey, look at the bright side... it was only a $500 mistake. Had you been programming for a telco company or the military, the one-line error could have cost $500 million instead. :-) >26.f4? (Bg2) > >REBEL10.5 (with the Rebel6 extension) >r6k/1p4pp/3p4/1R1B1p2/1pPP4/6Pb/1P2qP1P/2Q3K1 w - - >00:00:04 7.00 0.47 Rb5xb7 Ra8-e8 f2-f4 Qe2-d3 Rb7xb4 Qd3xd4+ Kg1-h1 (3) >00:00:06 8.00 0.00 Rb5xb7 Ra8-e8 f2-f4 g7-g6 g3-g4 Re8-e4 Rb7-b8+ (4) >00:00:13 9.00 0.00 Rb5xb7 Ra8-e8 f2-f4 h7-h6 Rb7-f7 Re8-e4 Rf7-f8+ (10) >00:00:30 10.00 -0.04 Rb5xb7 Ra8-e8 f2-f4 h7-h6 Rb7-f7 Qe2-d3 Kg1-h1 (19) >00:01:33 11.00 -1.88 Rb5xb7 Ra8-e8 f2-f4 g7-g6 Bd5-h1 Qe2-e1+ Qc1xe1 (47) >00:03:36 11.08 -0.19 Bd5-g2 Qe2-d2 Qc1-f1 Bh3xg2 Kg1xg2 Qd2xb2 Rb5xb7 (175) >00:04:32 12.00 -0.19 Bd5-g2 Qe2-d2 Qc1-f1 Bh3xg2 Kg1xg2 Qd2xb2 Rb5xb7 (234) > >Also here the Rebel6 "mate-threat" extension does miracles and the correct >move is played. I will have a closer look if this old Rebel6 "mate-threat" >extension can be improved. > >Ed Schroder Dave
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.