Author: Dann Corbit
Date: 13:36:41 02/28/02
Go up one level in this thread
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?
Beowulf does not swap queens as black (which I think is a mistake). Now, when
you are behind, the last thing you want to do is trade equal pieces and
especially queens. But in this case, I think it saves a draw. Darting away
will probably end in a loss.
FEN = 8/4b1k1/R5pp/2p1pp2/1pQq4/1P1P3P/1P3PPK/8 w - -
. . . . . . . .
. . . . b . k .
R . . . . . p p
. . p . p p . .
. p Q q . . . .
. P . P . . . P
. P . . . P P K
. . . . . . . .
Current Position = 0.36
Number of Possible Moves = 32
6 119 41 37153 Ra7 Kf6 Qc2 h5 Ra6+ Kg5 g3
6 126 68 57382 Re6 Bg5 Rc6 Qxf2 Rc7+ Kh8 Qxc5 Qxc5 Rxc5
6 128 86 71038 Kg1 Qd7 Re6 Bf6 Kh2 Qd4 Rc6 Qxf2 Rc7+ Kh8 Qxc5
Qxc5 Rxc5
7 188! 133 113312 Kg1 Qd7 Re6 Bd8 Rxe5 Qxd3
7 216 171 145499 Kg1 e4 dxe4 Qxe4 Re6 Qb1+ Kh2 Bf8
8 156? 299 279142 Kg1 Qd7 Re6 Bf6 f4 exf4 Re5
8 156 555 587444 Kg1 Qd7 Re6 g5 Rxe5 Qxd3 Rxe7+ Kf6
9 216! 631 683063 Kg1 Qd7 Re6 Bf8 Rxe5 Bd6 Re6 Be7
9 244 708 782411 Kg1 Qd7 Re6 Qa7 Qd5 Qc7 Rxe5 g5
10 222 1207 1476034 Kg1 Qd7 Re6 Bf6 Qa6 Qf7 Qc8 Kh7 Rd6 Be7
11 230 3126 4201103 Kg1 Qd7 Re6 Bf6 Qa6 Qf7 Qc8 Qa7
12 199 8899 12272719 Kg1 Qd7 Re6 Bf6 Qa6 Qf7 Qc6 f4 Kf1 g5 Rd6 f3
Qxc5
12 199 99901 124204790 Kg1 Qd7 Re6 Bf6 Qa6 Qf7 Qc6 f4 Kf1 g5 Rd6 f3
Search Time : 999.0 Seconds
Total Nodes Searched : 124204790 (76.1% Qui)
Total Nodes Evaluated : 94319161
Cuts : Delta 29423727 : SEE 5982429 : Mate 0
: Razor 2707622 : Eval 39754979
Extensions : Check 12066219 : OneRep 954613 : CMThreat 86622
: Pawn 45270 : Recap 366300 : RevCheck 131066
Hash Stores (Size) : 13171791 (8388593)
Hash Probes (Hits) : 91973068 (14600868)
EGTB Probes (Hits) : 4 (4)
Move Ordering : 69.1%
Best Move = h2g1
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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