Author: Dann Corbit
Date: 14:15:21 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?
Pepito:
5 102 93 7570 Ra6-e6 Be7-f6 Qc4xd4 c5xd4 Kh2-g3 h5
5 108 94 11111 Qc4xd4 c5xd4 f3 h5 Kh2-g3 Kg7-f7
5 108 96 18069 Qc4xd4 c5xd4 f3 h5 Kh2-g3 Kg7-f7
6 115 97 23172 Qc4xd4 c5xd4 f3 h5 Kh2-g3 Be7-f6 Ra6-c6
6 115 106 56676 Qc4xd4 c5xd4 f3 h5 Kh2-g3 Be7-f6 Ra6-c6
7 108 109 70584 Qc4xd4 c5xd4 Kh2-g3 h5 Kg3-f3 Kg7-f7 g3 Be7-f6
7 116 126 141928 Ra6-e6 Be7-h4 Qc4xd4 e5xd4 g3 Bh4-f6 Re6-c6 Bf6-e7
7 116 155 263170 Ra6-e6 Be7-h4 Qc4xd4 e5xd4 g3 Bh4-f6 Re6-c6 Bf6-e7
8 113 187 406049 Ra6-e6 Kg7-f7 Re6-c6 Kf7-g7 Qc4xd4 c5xd4 f3 h5 Kh2-g3
Kg7-f7
8 131 211 507706 Kh2-g1 Qd4-d7 Qc4-e6 Qd7xe6 Ra6xe6 Be7-f6 Re6-c6 Bf6-e7
Rc6-c7
8 131 225 571032 Kh2-g1 Qd4-d7 Qc4-e6 Qd7xe6 Ra6xe6 Be7-f6 Re6-c6 Bf6-e7
Rc6-c7
9 108 244 655794 Kh2-g1 Qd4-d7 Qc4-e6 Qd7xe6 Ra6xe6 Be7-f6 Re6-c6 Bf6-e7
Rc6-c7 Kg7-f6
9 116 317 979486 Ra6-e6 Kg7-f7 Re6-c6 Kf7-g7 Qc4xd4 c5xd4 f3 h5 Kh2-g3
Be7-g5 Rc6-c5
9 116 454 1577313 Ra6-e6 Kg7-f7 Re6-c6 Kf7-g7 Qc4xd4 c5xd4 f3 h5 Kh2-g3
Be7-g5 Rc6-c5
10 135 755 2895113 Ra6-e6 Kg7-f7 Re6-c6 Kf7-g7 Kh2-g1 Qd4-f4 Rc6-e6 Be7-f8
Qc4xf4 e5xf4
10 135 880 3468381 Ra6-e6 Kg7-f7 Re6-c6 Kf7-g7 Kh2-g1 Qd4-f4 Rc6-e6 Be7-f8
Qc4xf4 e5xf4
11 129 1306 5408592 Ra6-e6 Be7-f8 Qc4xd4 e5xd4 Kh2-g3 h5 Kg3-f4 Kg7-f7
Re6-c6 Bf8-e7 Kf4-e5 Kf7-g7
11 129 2182 9287262 Ra6-e6 Be7-f8 Qc4xd4 e5xd4 Kh2-g3 h5 Kg3-f4 Kg7-f7
Re6-c6 Bf8-e7 Kf4-e5 Kf7-g7
12 135 2549 10918004 Ra6-e6 Be7-f8 Qc4xd4 e5xd4 Kh2-g3 h5 Kg3-f4 Kg7-f7
Re6-c6 Bf8-h6 Kf4-e5 Bh6-g7 Ke5-d5 Bg7-f8 h4 Bf8-e7
12 135 4315 18764577 Ra6-e6 Be7-f8 Qc4xd4 e5xd4 Kh2-g3 h5 Kg3-f4 Kg7-f7
Re6-c6 Bf8-h6 Kf4-e5 Bh6-g7 Ke5-d5 Bg7-f8 h4 Bf8-e7
13 142 7376 31803951 Ra6-e6 Be7-f8 Qc4xd4 c5xd4 Kh2-g1 e4 d3xe4 d3 Kg1-f1
f5xe4 Re6xe4 Bf8-c5 Re4-c4 Bc5-d6
13 161 9236 40423319 Kh2-g1 Qd4xc4 b3xc4 h5 Ra6-a7 Kg7-f6 f3 Be7-d6 Ra7-a6
Kf6-e7 Kg1-f2 Ke7-e6 b3 Ke6-d7
13 161 10855 47803063 Kh2-g1 Qd4xc4 b3xc4 h5 Ra6-a7 Kg7-f6 f3 Be7-d6 Ra7-a6
Kf6-e7 Kg1-f2 Ke7-e6 b3 Ke6-d7
14 163 12194 53912257 Kh2-g1 Qd4xc4 b3xc4 h5 Ra6-a7 Kg7-f6 f3 Be7-d6 Ra7-a6
Kf6-e7 Kg1-f2 Ke7-d7 Ra6-a5 b3 Kf2-e3
14 163 16576 73673869 Kh2-g1 Qd4xc4 b3xc4 h5 Ra6-a7 Kg7-f6 f3 Be7-d6 Ra7-a6
Kf6-e7 Kg1-f2 Ke7-d7 Ra6-a5 b3 Kf2-e3
15 164 19349 86438766 Kh2-g1 Qd4xc4 b3xc4 h5 Ra6-a7 Kg7-f6 f3 Be7-d6 Ra7-a6
Kf6-e7 Kg1-f2 Ke7-d7 Ra6-a7 Kd7-e6 Ra7-a5 Bd6-e7 Kf2-e3
15 164 34247 152946598 Kh2-g1 Qd4xc4 b3xc4 h5 Ra6-a7 Kg7-f6 f3 Be7-d6 Ra7-a6
Kf6-e7 Kg1-f2 Ke7-d7 Ra6-a7 Kd7-e6 Ra7-a5 Bd6-e7 Kf2-e3
And here is Gaviota:
200 1: 0.0 +1.79 Qc4xd4 c5xd4
642 2: 0.0 +1.79 Qc4xd4 c5xd4 <EMPTY> <-transp
2036 3: 0.0 +2.04 Ra6-e6 Qd4-d8 Re6xe5
3609 4 0.0 +1.96 Ra6-e6 Be7-f6 Qc4xd4 c5xd4
5014 4: 0.1 +1.96 Ra6-e6 Be7-f6 Qc4xd4 c5xd4
7977 5 0.1 +2.02 Ra6-e6 Be7-f6 Qc4xd4 c5xd4
g2-g3
13825 5: 0.1 +2.02 Ra6-e6 Be7-f6 Qc4xd4 c5xd4
g2-g3
22575 6 0.2 +1.91 Ra6-e6 Be7-f6 Qc4xd4 c5xd4
g2-g3 Kg7-f7
43532 6: 0.3 +1.91 Ra6-e6 Be7-f6 Qc4xd4 c5xd4
g2-g3 Kg7-f7
68109 7 0.5 +1.93 Ra6-e6 Be7-f6 Qc4xd4 c5xd4
g2-g3 Kg7-f7 Re6-b6
142275 7: 1.1 +1.93 Ra6-e6 Be7-f6 Qc4xd4 c5xd4
g2-g3 Kg7-f7 Re6-b6
292394 8 2.2 +1.84 Ra6-e6 Be7-f6 Qc4xd4 c5xd4
g2-g3 Kg7-f7 Re6-b6 Bf6-e7
438062 8 3.2 +1.85 Qc4xd4 c5xd4 Kh2-g3 Kg7-f7
Ra6-a5 Be7-d6 Ra5-a7 Bd6-e7
f2-f4 <-transp
993926 8: 7.4 +1.85 Qc4xd4 c5xd4 Kh2-g3 Kg7-f7
Ra6-a5 Be7-d6 Ra5-a7 Bd6-e7
f2-f4 <-transp
1024233 9 7.6 +1.85 Qc4xd4 c5xd4 Kh2-g3 Kg7-f7
Ra6-a5 Kf7-e6 Ra5-b5 Be7-d6
Kg3-f3
2066802 9: 15.2 +1.85 Qc4xd4 c5xd4 Kh2-g3 Kg7-f7
Ra6-a5 Kf7-e6 Ra5-b5 Be7-d6
Kg3-f3
2274389 10 16.6 +1.83 Qc4xd4 c5xd4 Kh2-g3 Kg7-f7
Ra6-a5 Kf7-e6 Kg3-f3 Be7-d8
Ra5-a6 Ke6-f7 g2-g3
5036486 10 37.1 +1.96 Ra6-e6 Be7-f6 Qc4xd4 c5xd4
Re6-b6 Bf6-e7 Kh2-g3 Kg7-f7
f2-f4 <-transp
10097963 10: 74.5 +1.96 Ra6-e6 Be7-f6 Qc4xd4 c5xd4
Re6-b6 Bf6-e7 Kh2-g3 Kg7-f7
f2-f4 <-transp
14099178 11 105.3 +1.85 Ra6-e6 Be7-f6 Qc4xd4 c5xd4
Re6-b6 Bf6-e7 Kh2-g3 Kg7-f7
Kg3-f3 Be7-f8 Rb6-b5 Bf8-d6
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