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Subject: Re: Testposition: Queen ending

Author: Martin Giepmans

Date: 12:40:38 01/30/02

Go up one level in this thread


On January 30, 2002 at 11:58:49, Andrew Smith wrote:

>This is an interesting position. In particular, the fourth move in the winning
>line. Qg7 Kh2 f8Q Qb6+ Kh6 *Bc6*. Other moves are possibly winning but 4. Bc6
>looks to be the best by far. I let gambit tiger analyse this over night, and it
>couldn't come up with 4. Bc6. What do other programs think here on fast
>hardware? Can they find Bc6 in the initial position?
>
>[D]5Q2/5P1b/8/7K/8/1q4k1/1p4B1/8 w - - 0 1

My engine has Bc6 in the PV at depth 13 and sees the win at depth 14.
Is it the line that you intended?

SpiderChess (amd 1200, no TB)
05  00:00:00  + 4.63  F8-G7 H7-G6 G7xG6 G3-H2 F7-F8D B3-B5 H5-G4 B2-B1D G6xB1
                      B5xB1
05  00:00:00  + 1.21  F8-G7 G3-H2 F7-F8D B3-B5 H5-H4 B2-B1D
06  00:00:00  + 4.00  F8-G7 G3-H2 F7-F8D B3-B5 H5-H6 B5-B6 H6xH7 B2-B1D H7-G8
06  00:00:00  + 4.00  F8-G7 G3-H2 F7-F8D B3-B5 H5-H6 B5-B6 H6xH7 B2-B1D H7-G8
07  00:00:00  + 3.40  F8-G7 G3-H2 F7-F8D B3-B5 H5-H6 B5-B6 H6xH7 B2-B1D H7-H8
                      B6-G6
08  00:00:01  + 2.50  F8-G7 G3-H2 F7-F8D B3-B5 H5-H6 B5-B6 H6xH7 B2-B1D H7-H8
                      B6-G6 G2-D5 H2-G1
09  00:00:02  + 3.26  F8-G7 G3-H2 F7-F8D B3-B5 H5-H6 B5-B6 H6xH7 B2-B1D H7-H8
                      B6-G6 G7xG6 B1xG6 G2-F3
09  00:00:03  + 3.26  F8-G7 G3-H2 F7-F8D B3-B5 H5-H6 B5-B6 H6xH7 B2-B1D H7-H8
                      B6-G6 G7xG6 B1xG6 G2-F3
10  00:00:10  + 2.37  F8-G7 G3-H2 F7-F8D B3-B5 H5-H6 B5-B6 H6xH7 B2-B1D H7-H8
                      B6-G6 G7xG6 B1xG6 G2-D5 H2-G1
11  00:00:22  + 3.23  F8-G7 G3-H2 F7-F8D B3-B5 H5-H6 B5-B6 H6xH7 B2-B1D H7-H8
                      B6-B8 G2-C6 B8xF8 G7xF8 B1-G1 F8-H6 H2-G3 H8-G7
11  00:00:30  + 3.23  F8-G7 G3-H2 F7-F8D B3-B5 H5-H6 B5-B6 H6xH7 B2-B1D H7-H8
                      B6-B8 G2-C6 B8xF8 G7xF8 B1-G1 F8-H6 H2-G3 H8-G7
12  00:01:36  + 2.17  F8-G7 G3-H2 F7-F8D B3-B5 H5-H6 B5-B6 H6xH7 B2-B1D H7-H8
                      B6-B8 G2-F1 B8xF8 G7xF8 H2-G1 F1-C4 B1-G6 C4-F7
12  00:04:02  + 0.48  F8-G7 G3-H2 F7-F8D B3-B5 H5-H6 B5-B6 H6xH7 B2-B1D H7-H8
                      B6-B8 G7-H6 H2xG2 H6-D2 G2-H3 D2-E3 B8-G3 E3-H6 H3-G4
                      H6-G7 G4-H4
13  00:07:26  + 0.94  F8-G7 G3-H2 F7-F8D B3-B5 H5-H6 B5-B6 G2-C6 B6xC6 H6xH7
                      B2-B1D H7-H8 B1-G6 G7-E5 H2-G2 E5-E2 G2-H3 F8-A3 G6-G3
                      E2-H5 H3-G2 A3-A2 G3-F2 A2-G8 F2-G3 H5-H1 G2xH1 G8xG3
14  00:12:02  + 10.83 F8-G7 G3-H2 F7-F8D B3-B5 H5-H6 B5-B6 G2-C6 B6xC6 H6xH7
                      B2-B1D H7-H8 C6-G2 F8-D6 H2-H1 G7-H6 H1-G1 D6-D4 G2-F2
                      H6-G5 G1-F1 D4-C4 F1-E1 G5-A5 E1-D1 A5-H5 D1-D2 H5-D5
                      D2-E1 D5-H1
14  00:15:24  + 11.38 F8-G7 G3-H2 F7-F8D B3-B5 H5-H6 B5-B6 G2-C6 B6xC6 H6xH7
                      B2-B1D H7-H8 H2-H1 F8-G8 B1-B2 G7xB2 C6-H6 G8-H7 H6xH7
                      H8xH7 H1-G1 B2-B6 G1-G2 H7-G6

Martin



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