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Subject: Re: B x g6.....Modified position..

Author: Martin Giepmans

Date: 15:15:26 04/02/02

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On April 02, 2002 at 12:43:12, Art Basham wrote:

>This one should work much better than the other one..;
>now Gambit Tiger finds Bxg6 at only 11 ply....
>
>[D]r1b5/3k1r1p/1p1P2pP/p1pR4/P1P2p2/2P5/2B3P1/4R1K1 w - -
>
>When there are "two good moves in a test position" (as in this case),
>just try to rearrange it and "eliminate the move" that is keeping your
>program from finding the right one..!
>
>ab

Funny.
In this position (I didn't try the other one) my engine says:

05  00:00:00  + 0.15  C2-D1 D7-D8 G1-F2 C8-B7 D5-E5
06  00:00:00  + 0.33  C2-D1 D7-D8 G1-F2 C8-B7 D5-E5 D8-D7
07  00:00:00  + 0.45  C2-D1 D7-D8 D5-E5 C8-D7 D1-F3 A8-A7 F3-D1
08  00:00:01  + 0.66  C2-D1 D7-D8 D1-F3 A8-A7 D5-D3 C8-D7 F3-D1 F7-F6
09  00:00:02  + 0.57  C2-D1 D7-D8 D1-F3 A8-A7 D5-D2 G6-G5 E1-E5 C8-F5 F3-D5
10  00:00:10  + 0.12  C2-D1 C8-B7 D1-G4 D7-D8 D6-D7 D8-C7 E1-E8 A8-D8 D5-D6
                      F7-F8 E8xF8 D8xF8
11  00:00:33  + 0.05  C2-D1 C8-B7 D1-G4 D7-D8 D5-E5 B7-C6 G4-F3 C6xF3 G2xF3
                      F7-A7 E5-E8 D8-D7 E8xA8 A7xA8 E1-E7 D7xD6 E7xH7
12  00:01:53  + 0.38  C2-D1 A8-B8 D1-G4 D7-D8 G4xC8 B8xC8 D5-E5 D8-D7 E5-E7
                      F7xE7 E1xE7 D7xD6 E7xH7 D6-E5 H7-B7 F4-F3 H6-H7
    00:03:23  + 0.42  C2xG6 H7xG6 E1-E7 F7xE7 D6xE7 D7xE7 D5-D8 E7xD8 H6-H7
                      D8-C7 H7-H8D G6-G5 H8-E5 C7-B7 E5xG5 C8-D7 G5-E7 B7-C7
13  00:04:39  + 0.07  C2xG6 H7xG6 E1-E7 F7xE7 D6xE7 D7xE7 D5-D8 E7xD8 H6-H7
                      D8-C7 H7-H8D C7-B7 H8-G7 B7-A6 G7xG6 C8-D7 G6-C2 A8-E8
                      G1-F2
    00:06:32  + 0.22  C2-D1 A8-B8 D5-E5 D7xD6 E5-E8 D6-C7 E8-E7 F7xE7 E1xE7
                      C7-D6 E7xH7 C8-F5 G1-F2 D6-E5 F2-F3 F5-E4 F3-G4

Still two good moves ??
OK, add a black pawn on h5 to prevent B(-c2-d1)-g4:

05  00:00:00  - 0.97  G1-F2 C8-B7 D5-D3 F4-F3 G2xF3
06  00:00:00  - 0.97  G1-F2 F4-F3 G2xF3 C8-B7 D5-D3 A8-F8
07  00:00:00  - 1.33  G1-F2 F4-F3 G2xF3 C8-B7 D5-D3 A8-F8 E1-E3 F7-F4 E3-E7
    00:00:00  - 1.15  C2-D1 C8-A6 D1-F3 A6xC4 D5-D2 A8-E8 F3-C6 D7xC6 E1xE8
    00:00:01  - 1.14  D5-D2 C8-B7 D2-E2 A8-H8 E2-E7 F7xE7 D6xE7
08  00:00:02  - 0.84  D5-D2 C8-A6 C2-E4 A8-H8 E4-D5 F7-F6 E1-E7 D7xD6 D2-E2
09  00:00:06  - 0.91  D5-D2 C8-B7 D2-E2 D7xD6 E2-E6 D6-D7 E6xB6 B7-C6 C2-E4
                      A8-C8
10  00:00:19  - 1.14  D5-D2 C8-B7 D2-E2 B7-C6 E2-E7 F7xE7 E1xE7 D7xD6 E7xH7
                      F4-F3 G2xF3 D6-E5 C2xG6 C6xA4 G6xH5
    00:00:51  - 0.70  C2xG6 H7xG6 E1-E7 F7xE7 D6xE7 D7xE7 D5-D8 E7xD8 H6-H7
                      G6-G5 H7-H8D D8-C7 H8xH5 C8-B7 G1-F2 A8-D8 H5xG5
11  00:01:06  - 0.29  C2xG6 H7xG6 E1-E7 F7xE7 D6xE7 D7xE7 D5-D8 E7xD8 H6-H7
                      G6-G5 H7-H8D D8-C7 H8-E5 C7-B7 E5xG5 C8-D7 G5-E7 B7-C7

Now Bxg6 is the one and only move, I guess.
I don't know if it wins ;)

Martin



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