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Subject: Re: some positions, incl pawn majority in endgame

Author: Robert Hyatt

Date: 07:48:32 07/18/00

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On July 18, 2000 at 08:56:08, Andrew Williams wrote:

>On July 17, 2000 at 20:26:44, Will Singleton wrote:
>
>Hi Will,
>
>A very nice game by Amateur!
>
>>These are from an interesting game/30 on ICC.
>>
>>21...Qxa2 the best?
>>5rr1/p5pp/1pp2k2/q3p1NQ/4P3/1RbP4/P4PPP/5K1R b - -
>>
>
>After a 2 minute search, PostModernist comes up with this:
>1... g6 2. Qh6 Qxa2 3. Nxh7 Ke7 4. Nxf8 Qxb3 5. Nxg6 Rxg6 6. Qxg6 Qd1
>with score of +0.69 for black
>


crafty oscillated between those two moves as well.


>
>>22.Nxh7+ (how long to avoid?)
>>5rr1/p5pp/1pp2k2/4p1NQ/4P3/1RbP4/q4PPP/5K1R w - -
>>
>
>Mine wants to play it, even after 2 minutes. The score drops to -0.67. During
>the game, the score dropped to -2.23 after Amateur's reply.

Crafty sees this as bad pretty quickly.  But the alternatives are also bad
too, just not quite "as bad"..



>
>>36...Qe6!?  (anyone play this?)
>>8/3k1r2/1pp4P/p3p2K/3bP1Q1/5P2/q5P1/7R b - -
>>
>
>Mine likes Qe6. The score is 1.35 after two minutes.


my king safety just slightly overrides the endgame code and Crafty wants to
keep queens on with white's king in such an exposed place.


>
>
>>after 38.Kg6 (can the black pawns be stopped? if not, what's the proper eval
>>score here?)
>>8/5r2/1pp1k1KP/p3p3/3bP3/5P2/6P1/7R b - -
>>
>>
>>
>>[Event "ICC 30 0"]
>>[Site "Internet Chess Club"]
>>[Date "2000.07.17"]
>>[Round "-"]
>>[White "PostModernist"]
>>[Black "Amateur"]
>>[Result "0-1"]
>>[ICCResult "White resigns"]
>>[WhiteElo "2410"]
>>[BlackElo "2412"]
>>[Opening "Bishop's opening: Berlin defense"]
>>[ECO "C24"]
>>[NIC "IG.04"]
>>[Time "00:34:44"]
>>[TimeControl "1800+0"]
>>
>>1.e4 e5 2.Bc4 Nf6 3.d3 c6 4.Nf3 d5 5.Bb3 Bd6 6.Nc3 d4 7.Ne2 Bg4
>>8.Ng3 Bxf3 9.Qxf3 Bb4+ 10.Kf1 Nbd7 11.Nf5 Rg8 12.c3? {questionable}
>>12...dxc3 13.bxc3 Bxc3 14.Nd6+ Ke7 15.Nxf7 Qa5 16.Rb1 Nc5
>>17.Bg5 Raf8 {not the best, but OK} 18.Qh5? {Bxf6+ better} 18...Nxb3
>>19.Rxb3 b6 20.Bxf6+ Kxf6 21.Ng5 21...Qxa2! {Black stumbles into the best move}
>>22.Nxh7+? {falls into the trap - RxB better, but White is still in trouble}
>>22...Ke7 23.Nxf8 {23.Qg5+ Kd6 24.Qg6+ Kc7 25.Nxf8 Qxb3} 23...Rxf8 24.Qh4+ g5
>>25.Qxg5+ Rf6 26.Qg7+ Rf7 27.Qg5+ Kd7 28.f3 Qxb3 29.Kf2 Qc2+ 30.Kg3 Bd4
>>31.h4 Qxd3 32.h5 a5 33.h6 Qe3 34.Kg4 Qe2 35.Kh5 Qa2 36.Qg4+ Qe6!?
>>{looks like a mistake; but after the queens are gone, can the black pawns
>>be stopped?  is this a mistake, or the best move?}
>>37.Qxe6+ Kxe6 38.Kg6 b5 39.h7 Rxh7 40.Kxh7 a4 41.g4 Be3 42.Rh5 a3 43.g5 a2
>>44.Rh1 {44.g6 a1Q 45.g7 Qa8 46.g8Q+ Qxg8+ 47.Kxg8 c5 48.Rh7 c4 49.Rc7 Kd6}
>>44...Bxg5 45.Ra1 c5 46.Rxa2 c4 47.Kg6 Bf4 48.Ra8 Kd7 49.Ra7+ Kc6 50.Ra2 c3
>>51.Rc2 b4 52.Kf6 Kc5 53.Kf5 Kc4 54.Ra2 b3 55.Ra4+ Kc5 56.Ra3 c2 57.Rxb3 c1Q
>>58.Rd3 Kc4 59.Rd8 Qa3 {white resigns} 0-1
>
>Cheers
>
>Andrew



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