Author: martin fierz
Date: 19:13:06 02/28/02
Go up one level in this thread
On February 28, 2002 at 20:39:50, Dann Corbit wrote:
>On February 28, 2002 at 15:00:03, Les Fernandez wrote:
>
>>[D]8/4b1k1/R5pp/2p1pp2/1pQq4/1P1P3P/1P3PPK/8 w - -
>>
>>
>>I am interested to know if the above position can be held by black. White is
>>short on time but can force perpetual by Qe6. Although a rook is better then a
>>bishop, most of the time, should white exchange queens here? I am only an
>>average player but after doing a little analysis on this position Crafty reports
>>the following on a fairly slow machine. (Pentium 350, 256 mb ram)
>>
>>8/4b1k1/R5pp/2p1pp2/1pQq4/1P1P3P/1P3PPK/8 w - - acd 15; acn 170618898; acs 900;
>>ce 155; pv Kg1 Qxc4 bxc4 h5 g3 Kf7 Kg2 Bf6 Rc6 Be7 Kf3 g5;
>>
>>Although white is reported to have a 1.55 advantage after Kg1 I wonder if the
>>position can be held by black. I also took a look at the position with white
>>taking the queen and the ce still appeared about the same with black capturing
>>white queen with cxd4.
>>
>>8/4b1k1/R5pp/2p1pp2/1p1Q4/1P1P3P/1P3PPK/8 b - - acd 17; acn 186582676; acs 902;
>>ce -151; pv cxd4 Kg3 Kf7 Kf3 h5 Rc6 Bf6 Rb6 Be7 g3 Bf8 h4 Be7;
>>
>>Question is with queens off the board can the white rook start chopping up the
>>black pawns while the black bishop exists? Can someone run this on better
>>hardware and tkae it a bit deeper to see what falls out?
>
>One possible dominating sequence after the immediate queen exchange and pawn
>move to g4:
>
>[Event "?"]
>[Site "?"]
>[Date "????.??.??"]
>[Round "?"]
>[White "?"]
>[Black "?"]
>[Result "*"]
>[FEN "8/4b1k1/R5pp/2p2p2/1p1p2P1/1P1P3P/1P3P1K/8 b - - 0 1"]
>[SetUp "1"]
>
>{--------------
>. . . . . . . .
>. . . . b . k .
>R . . . . . p p
>. . p . . p . .
>. p . p . . P .
>. P . P . . . P
>. P . . . P . K
>. . . . . . . .
>black to play
>--------------}
>1... fxg4 2. hxg4 Kf7 3. Kg3 Bg5 4. Ra7+ Be7 5. Kf4 Kf6 6. Ra6+ Kf7 7. Ke5
>h5 8. gxh5 gxh5 9. Rh6 Bd8 10. Rxh5 Kg6 11. Rh3 Bc7+ 12. Ke6 Kg5 13. Rh7
>Bf4 14. Rg7+ Kh6 15. Rg1 Bc7 16. Rg8 Kh7 17. Kf7 Kh6 18. Kf6 Kh5 19. Kf5
>*
dann, this analysis is pointless. the only way black can hope for a draw is by
having a fortress, i.e. by keeping the white king from participating. in the
original position the white king is stuck, and that is the reason that white has
to play this g4 thing. already 0...exd4 in your analysis is wrong for that
reason, cxd4 is to be preferred. of course white is winning anyway, but black
should at least try to resist... there is no need for computer analysis in this
position - after 1...fxg4 all that is left over is white an exchange up, a bad
black bishop, weak black pawns, a potential white f-passer and a king which
plays. totally hopeless.
aloha
martin
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