Author: Richard Pijl
Date: 00:33:12 03/07/06
Go up one level in this thread
On March 06, 2006 at 22:53:05, Dann Corbit wrote:
>Lot's of programs have a problem with this one. It's a sacrifice leading to a
>forced mate. I would not worry about this one too much:
>[D] 4r1k1/p1qr1p2/2pb1Bp1/1p5p/3P1n1R/1B3P2/PP3PK1/2Q4R w - - bm Qxf4
Single reply extensions, mate threat extensions and checks in quiescense search
all help in finding this one quickly. Down-side: When used unrestricted,
searches will explode. I agree here with Dann, don't worry about this one.
The Baron finds the move in 7.6 seconds on a Xeon 2.8, reporting the mate in 48
seconds.
ply time nodes score pv
2( 3)- 0:00.00 285 -1.23 Kg2-g1 (Re8-e2)
2( 3)& 0:00.00 383 -1.70 Kg2-f1 Kg8-f8
2( 3). 0:00.00 414 -1.70 Kg2-f1 Kg8-f8
3( 5)& 0:00.00 757 -1.44 Kg2-f1 Kg8-f8 Qc1-d2
3( 5). 0:00.00 903 -1.44 Kg2-f1 Kg8-f8 Qc1-d2
4( 7)& 0:00.02 2352 -1.58 Kg2-f1 Kg8-f8 Bf6-g5 Nf4-e2
4( 7). 0:00.02 2880 -1.58 Kg2-f1 Kg8-f8 Bf6-g5 Nf4-e2
5( 9)& 0:00.09 14038 -1.70 Kg2-f1 Re8-e2 Kf1-g1 Re2xf2 Qc1-e1
5( 9). 0:00.09 15667 -1.70 Kg2-f1 Re8-e2 Kf1-g1 Re2xf2 Qc1-e1
6(12)& 0:00.28 44250 -1.81 Kg2-f1 Re8-e2 Kf1-g1 Re2xf2 Qc1-e3
Rf2-g2 Kg1-f1 Kg8-h7
6(12). 0:00.30 48368 -1.81 Kg2-f1 Re8-e2 Kf1-g1 Re2xf2 Qc1-e3
Rf2-g2 Kg1-f1 Kg8-h7
7(13)& 0:00.97 153287 -1.93 Kg2-f1 Re8-e2 Rh1-h2 Kg8-f8 a2-a4
b5xa4 Bb3xa4 Nf4-d3
7(13). 0:01.45 232925 -1.93 Kg2-f1 Re8-e2 Rh1-h2 Kg8-f8 a2-a4
b5xa4 Bb3xa4 Nf4-d3
8(16)+ 0:04.75 784071 -1.58 Kg2-f1 (Re8-e2) (Rh4xf4) (Bd6xf4) (Qc1-b1)
(Rd7-e7) (Qb1xg6) (Kg8-f8) (Bf6xe7)
(Qc7xe7) (Qg6xf7)
8(16)& 0:07.05 1186288 -1.03 Kg2-f1 Rd7-e7 Bf6xe7 Re8xe7 Rh1-g1
Kg8-f8 Rg1-g5 f7-f6 Rg5-g3
8(16)+ 0:07.61 1302604 -0.33 Qc1xf4 (Bd6xf4) (Rh4xh5) (g6xh5) (Rh1xh5)
(Bf4-h6) (Rh5xh6) (Kg8-f8) (Rh6-h8)
8(17)& 0:47.89 10652406 MATE6 Qc1xf4 Bd6xf4 Rh4xh5 g6xh5 Rh1xh5
Bf4-h6 Rh5xh6 Qc7-h2 Kg2xh2 b5-b4 Rh6-h8
8(17). 0:48.12 10697945 MATE6 Qc1xf4 Bd6xf4 Rh4xh5 g6xh5 Rh1xh5
Bf4-h6 Rh5xh6 Qc7-h2 Kg2xh2 b5-b4 Rh6-h8
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