Author: Jeremiah Penery
Date: 03:41:41 03/07/00
Go up one level in this thread
On March 06, 2000 at 11:31:44, Melvin S. Schwartz wrote:
>This is a game I played on the Internet over six months ago. After I played Bh2+
>my opponent did not resume the game and I was declared the winner. The position
>is very dynamic and I wondered if my move was the best one. Since my opponent
>never continued, I was left with looking at the possiblities myself. I gave this
>position to various chess programs I had at the time and this is what they
>played set at the tournament time control of 40/2
>
>Fritz 5.32 and Hiarcs 7.32 played Bh2+. Rebel 10 played Bxb2+.
>
>Now, since I have acquired some new programs since then, I decided to test
>Rebel-Century, CSTal 2.03, and CM7000 in this position expecting nothing
>different than what was played by the older programs. However, there was a
>surprise.
>
>CSTal 2.03 played Bh2+, Chessmater 7000 played Bxb2+, but Rebel-Tiger played
>Bf4+.
>
>While playing the game, my first instinct was to play Bf4+ to get rid of that
>nasty Bishop. However, I was concerned about that Rook at g1 along with White's
>Bishop at d3 and White's Queen at d1 all aiming at my King for a dangerous
>attack, and so I decided to eliminate what I considered at the time to be the
>biggest threat the Rook at g1. Therefore, when Rebel-Tiger came out with Bf4+ I
>was surprised, though not disappointed for it appears to be alright. The
>question I would like you to consider is which move do you think is best: Bf4+,
>Bh2+, or Bxb2+? I would also be interested in what other programs besides those
>mentioned by me have to say.
>
>Here is the FEN and hopefully a diagram of the position:
>
>[D] r1nqr1k1/pp3p2/3p2pB/1NpPb2n/2P5/3B3P/PP3P2/R2QK1R1 b ---Q 0 1
My modified Crafty plays Bxb2+. It doesn't like Bh2+, and doesn't even play 2.
...Bxg1 when searched. After 1. ...Bh2+ 2. Kd2 Bxg1 3. Qxg1, white has a
dangerous potential attack on g6. Here's what it gives in this line after
searching each subsequent position for several minutes, and playing the best
move each time. Evaluations (for the side to move) and depth included:
1. ...Bh2+ 2. Kd2 Bxg1 3. Qxg1 Kh7 {12, 0.58} 4. Bg5 {12, -0.58} Qd7 {12, .65}
5. Qg4 {13, -0.31} f5 {14, .66} 6. Qh4 {14, -0.38} {And here it failed low on a6
on ply 15 and returned a draw score. It is now searching other moves after 300
minutes. I must retire for the night, however, and so I will let this run.
I'll try to report back in the morning (I have to be up in 4 hours. :)}
I suspect that some of these moves may be sub-optimal. Can anyone suggest some
better alternatives before I go any further here?
Jeremiah
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.