Author: Dagh Nielsen
Date: 19:47:06 01/05/06
Go up one level in this thread
On January 05, 2006 at 21:14:04, Dann Corbit wrote:
>[Event "Moscow RUS"]
>[Site "Moscow RUS"]
>[Date "1951.??.??"]
>[Round "?"]
>[White "Gusev, Nikolai"]
>[Black "Averbakh, Yuri L"]
>[Result "1-0"]
>[ECO "B70"]
>
>1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.Nb3 Nc6 8.O-O
>Be6 9.f4 Rc8 10.f5 Bd7 11.g4 Ne5 12.g5 Ng8 13.Nd5 f6 14.Be3 b6 15.Nd4 Kf7
>16.c3 Qe8 17.Ne6 Bxe6 18.fxe6+ Kf8 19.Nxf6 Nxf6 20.gxf6 Bxf6 21.Bh6+ Kg8
>22.Rxf6 exf6 23.Qxd6 Rc6 24.Qxe5
>{
>4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - bm Qxe5; id "Gusev - Averbakh,
>Moscow 1951";
>}
>.. fxe5 25.Rf1 Rc8 26.Bd1 Rc4 27.Bb3 b5 28.
>Bxc4 bxc4 29.b3 a5 30.bxc4 Qe7 31.Kg2 Qa3 32.Rf2 Qe7 33.Rf1 g5 34.Rf5 g4
>35.c5 Qd8 36.c6 Qe7 37.c7 1-0
I have not cranked up my engine, but I think the sacrifice is correct.
Reasoning is roughly this, after 25.Rf1:
1 White puts bishop on d5
2 Now black must block pawn on e6 with piece on e7, or e6-e7+ is curtains.
2.1 Black puts queen on e7. Now if black rook is NOT on 8th rank, white wins by
Rf8+ Qxf8 e7+. IF black rook is on 8th, white wins by Rf7, for example:
2.1.1 Black rook on e8. Rf7, "no black queen move", Rxe7, Rxe7 and white wins by
3-2 pawn majority on queenside, black rook on e7 can't move. If Black queens
moves away from 7th rank after Rf7, white wins by Rg7+, Kf8, e7+, "black
captures pawn e7", Rg8#
2.1.2 Black rook on d8. Rf7, "black queen moves away from 7th rank", e7 is
curtains.
2.1.3 Black rook on a8, b8 or c8. Rf7 Qd8 (Qe8 Rg7+ Kf8 e7+ Qxe7 Rg8#) e7 is
curtains.
2.2 Black puts rook on e7 (after Bd5). Now Black queen must stay on 8th rank,
and black rook on e7. White creates passed pawn on queen side, push it to 7th
rank. Black must now put queen on e8, or Rf7-Rxe7 wins. So, Qe8 and now Rf8+
Qxf8 Bxf8 Rx"white pawn on 7th" (only move) e7+ and e8Q wins.
I don't think there is any non-losing way for black to prevent white from
putting his bishop on d5, and I don't think there is any perpetual somewhere
above, so, I think the sacrifice is correct.
Kind regards,
Dagh Nielsen
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.