Author: Dann Corbit
Date: 12:30:11 02/17/99
Go up one level in this thread
On February 17, 1999 at 15:18:54, Howard Exner wrote:
>On February 17, 1999 at 15:05:02, Howard Exner wrote:
>
>>On February 17, 1999 at 13:32:01, Dann Corbit wrote:
>>
>>>On February 17, 1999 at 03:20:53, Howard Exner wrote:
>>>[snip]
>>>>Instead of f5 manually play for black by moving the king towards the trapped
>>>>bishop. The black king should get there in time to capture the bishop. That's
>>>>why I put the black king so far away in order to make it more difficult. I
>>>>did not want it to be solved by search alone but by some kind of code that
>>>>recognizes how dangerous it is to have the bishop trapped.
>>>In my "simulation" (before the crafty output) I did the king chase by hand,
>>>first closing the door of punching out through the other back pawn with the
>>>white bishop by protecting it with the black one.
>>>I think the bishop can be saved after taking the pawn.
>>
>>Perhaps, but what line of play did you follow?
>
>7k/ppp1bpp1/7p/8/8/1P1PB2P/1P3PP1/5K2 w
>
>Here is the line I saw...
>
>1. Bxa7 b6 2.Ke2 (if Bb8 then Bd6) Kg8 (I noticed in your Crafty output
>Crafty played Kh7 but that is not approaching the bishop) 3. Ke3 Kf8
>and so on
Here is w/o guarding the back door variation 1:
[Event "Chicago"]
[Site "?"]
[Date "1992.??.??"]
[Round "?"]
[White "Yoos, Jack"]
[Black "Brock, B."]
[Result "*"]
[ECO "C37"]
[Opening "KGA"]
[Variation "double Muzio gambit"]
1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. e5 Qxe5
8. Bxf7+ Kxf7 9. d4 *
[Event "?"]
[Site "?"]
[Date "?"]
[Round "-"]
[White "?"]
[Black "?"]
[Result "*"]
[FEN "7k/ppp1bpp1/7p/8/8/1P1PB2P/1P3PP1/5K2 w - - 0 1"]
[SetUp "1"]
{--------------
. . . . . . . k
p p p . b p p .
. . . . . . . p
. . . . . . . .
. . . . . . . .
. P . P B . . P
. P . . . P P .
. . . . . K . .
white to play
--------------}
1. Bxa7 b6 2. Ke2 Kg8 3. Ke3 Kf8 4. Kd4 Ke8 5. Kd5 Kd8 6. Kc6 Kc8
*
Here is guarding the back door:
[Event "?"]
[Site "?"]
[Date "?"]
[Round "-"]
[White "?"]
[Black "?"]
[Result "*"]
[FEN "7k/ppp1bpp1/7p/8/8/1P1PB2P/1P3PP1/5K2 w - - 0 1"]
[SetUp "1"]
{--------------
. . . . . . . k
p p p . b p p .
. . . . . . . p
. . . . . . . .
. . . . . . . .
. P . P B . . P
. P . . . P P .
. . . . . K . .
white to play
--------------}
1. Bxa7 b6 2. Bb8 Bd6 3. Ke2 Kg8 4. Ke3 Kf8 5. Kd4 Ke8 6. Kd5 Kd8 7. Kc6
Kc8 8. Ba7
*
The pieces are locked up at the end, but I don't see a clear benefit for either
side in the log jam.
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