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Coigach
Member since Jun-08-09 · Last seen Jul-09-16
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   Coigach has kibitzed 31 times to chessgames   [more...]
   Jun-01-13 J Gustafsson vs Kramnik, 2012 (replies)
 
Coigach: Strange puzzle. 21...Rxa4 seems obvious, forcing 22.ba. Then it appears either ...Bd4 or ...Nb4 will win for B on move 22. 22...Nb4 23.Bc4 Bd4 and the White Knight is lost (24.Kf2 Nc2). Black will then have two Bishops for a Rook, with the advanced a-pawn soon likely to cost White ...
 
   Apr-26-13 Janowski vs Lasker, 1909 (replies)
 
Coigach: I didn't find this easy at all. I spent a lot of time trying to make 28...Qh3+ work and not succeeding. I then gave up as I had previously dismissed 28...g5 thinking it just fails to 29.Kh1. I should have looked further, as 29...Qxh3+ 30.Rh2 Qxf3+ 31.Rgg2 leaves B a couple of pawns
 
   Apr-05-13 Lombardy vs Fischer, 1958 (replies)
 
Coigach: Marvelously instructive endgame from 55 years ago. Thanks, <bartonlaos> for the ChessLife story.
 
   Dec-26-12 T Gelashvili vs N Mihakis, 1998 (replies)
 
Coigach: 22. Rxg7 is most forcing and the cleanest win. In the final position 24...Rf7 25.Qg6+ Kh8 26.ef. I only looked at 22.Nf5 which seems enough to win. E.g. 22...Rg8 23.Rg5 Qf8 24.e7 Qf7 25.Rxh6+ gh 26.Qxh6#. But there are a few other Black 22nd moves to calculate. They all look ...
 
   Nov-18-12 O Zambrana vs I Krush, 2003 (replies)
 
Coigach: Patriot: <<Coigach>: How about 27...axb6 and if 27.cxb6 Qb8? The position still has all the same elements except the a5-knight is no longer hanging. I think you are right, this is fine for Black. I was thinking of 28.Nxc6 but it seems just taking the knight is good enough ...
 
   Nov-11-12 Nunn vs Sadler, 1993 (replies)
 
Coigach: Too subtle for me. I thought I'd found a win with 27.Bxd6 Qa3 28.Bb5+ ab 29.Qxb5+. This seems to win but is insufficient if Black moves his King away on move 28. I didn't see the two winning key moves.
 
   Oct-19-12 G Brhlik vs F Berebora, 1995 (replies)
 
Coigach: I'm another one who went for 24...Nf4. It wins too, although in my analysis I missed W's best defence. I spent quite a bit of time calculating wins e.g. 25.gf Qxg2# 25.Nc4 Nxg2 26.Nxe3 de 27.Qd1 Nxe1 25.Bxb7 Rxg3+ 26.hg (26.Bg2 Rxg2+ mating) Qxg3+ but my analysis went astray after
 
   Oct-16-12 S Klimov vs A Gubanov, 1995 (replies)
 
Coigach: 31.Be4
 
   Oct-15-12 Speelman vs J Durao, 1978 (replies)
 
Coigach: Qe8+ & Re8+
 
   Oct-10-12 D Zagorskis vs J Michenka, 1994 (replies)
 
Coigach: 29.Bd4 is a killer, offering the Q for a mating combination ...Qxe2 30.Rxg7+ Kh8 31.Rxg6+ Qe5 (31...Re5 32.Rf8#) 32.Bxe5+ Rxe5 33.Rf8#. The Black Q cannot move off the e-file other than by 29...Qb8 or else 30.Qxe8# and if 29...Qb8 30.Rxg7+ Kh8 31.Rxg6+ Re5 32.Bxe5#.
 
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