Author: Uri Blass
Date: 17:26:43 07/11/01
Go up one level in this thread
On July 11, 2001 at 20:18:05, James T. Walker wrote: >On July 11, 2001 at 18:59:27, Vincent Diepeveen wrote: > >>On July 11, 2001 at 17:25:34, James T. Walker wrote: >> >>>Junior 7 likes Nxd5 after 5 seconds on my Athlon 900. I holds it for over 3 >>>minutes with a score of less than 1. Junior 7 likes Nxd5 cxd5 Rxd5 but then >>>likes Nc4 Bc5 as a followup. If I force feed it Rd8 instead of Nc4 the score >>>goes slightly over +1. So anyway Junior 7 would play this (Nxd5) move probably >>>in blitz. >>>Jim >> >>we need a mainline. >> >>Nxd5 can be played because of 2 reasons >> a) patzerscores >> b) it sees the whole trick >> >>in case of a it didn't solve it. In case of b it must show >>at least next moves in mainline: >> nxd5 cd rd5 nc4 bf1! >> >>if other moves as bf1 shown then forget it. > > >Hello Vincent, >You may be right since you are a good chessplayer but my question is why do you >insist on Bf1? Since Bf1 was not played in the game and white won anyway why do >you believe Bf1 is needed? Maybe because of the following analysis of Junior7 on p200 blass,u - Junior 4.6 r5nr/pp3kpp/3b4/3R2P1/2n5/4B2B/PPP2P1P/2K1R3 w - - 0 1 Analysis by Junior 7: 3.g6+ hxg6 4.Bg4 Nxe3 5.Rxe3 µ (-0.95) Depth: 3 00:00:01 3.a4 Bxh2 = (-0.11) Depth: 3 00:00:01 1kN 3.a3 Bxh2 = (-0.05) Depth: 3 00:00:01 1kN 3.b3 Nxe3 4.Rxd6 = (-0.03) Depth: 3 00:00:01 1kN 3.f4 Nxe3 4.Rxd6 = (0.12) Depth: 3 00:00:01 1kN 3.Rb5 b6 ² (0.30) Depth: 3 00:00:01 1kN 3.Rb5 b6 4.Bg2 Rc8 5.Bd5+ Kg6 ² (0.42) Depth: 6 00:00:01 4kN 3.Rd4 b5 4.Bg2 Rd8 5.Bd5+ Kg6 6.Bxc4 bxc4 ² (0.47) Depth: 6 00:00:01 20kN 3.Rd4 b5 4.Bf1 Nxe3 5.Rxe3 Bc5 6.Rf3+ Kg6 7.Bd3+ Kh5 8.Rd7 Kxg5 ² (0.38) Depth: 9 00:00:02 169kN 3.Rf5+! ± (0.77) Depth: 9 00:00:04 566kN 3.Rf5+! Kg6 4.Bd4 Ne7 5.Re6+ Kh5 6.Rf7 Rhe8 7.Rxg7 ± (0.82) Depth: 9 00:00:05 595kN 3.Rf5+ Kg6 4.Bd4 Ne7 5.Re6+ Kh5 6.Rf7 Rad8 7.Bf1 b5 8.Bxc4 bxc4 9.Rfxe7 ± (0.89) Depth: 12 00:00:12 1661kN 3.Rf5+ Kg6 4.Bd4 Ne7 5.Re6+ Kh5 6.Rf7 Raf8 7.Rxg7 Nf5 8.Bxf5 Rxf5 9.h3 h6 10.g6 Be5 11.Bxe5 Nxe5 12.f4 ² (0.48) Depth: 14 00:02:20 19449kN 3.Bc5 Bxc5 4.Rxc5 Nb6 5.Rc7+ Kg6 6.Rxb7 Kxg5 7.Rxg7+ Kh6 8.Rf7 Kg6 9.Be6 Nh6 10.Rg1+ Kh5 11.Rfg7 ² (0.58) Depth: 14 00:04:58 40065kN 3.Bc5 Bxc5 4.Rxc5 Nb6 5.Rc7+ Kg6 6.Re6+ Kh5 7.Rxb7 g6 8.f4 Nd5 9.Rf7 Rd8 10.c4 Nb6 ² (0.51) Depth: 15 00:09:08 71272kN 3.Bf1! ± (0.88) Depth: 15 00:15:18 119688kN (blass, tel-aviv 12.07.2001) Also if I play the black moves from the Nxd5 move >on, Junior 7 plays the white side almost exactly as the game went with a minor >transposition. So it seems to me that if Junior 7 had been playing this game it >would have won in the same way and without Bf1. It seems that Junior could win it with Bf1 at tournament time control on fast hardware. It does not need to find Bf1 at the root position in order to do it. This does not seem like a >patzer to me. I know that humans also make the right move for the wrong reason >quite often (even if they claim they didn't). It just seems that in this case >there is more than one way to win. >Jim I do not know if there is more than 1 way to win but it seems that the alternatives to Bf1 are not bad for white so saying patzer evaluation about Junior only because of the fact that it did not see some tactics is not correct. Uri
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