Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: FRC_TheBaron_101 Vs Fritz8 (Castling vs Not Castling rules)

Author: Landon Rabern

Date: 09:39:07 06/24/03

Go up one level in this thread


On June 24, 2003 at 11:40:18, Richard Pijl wrote:

>On June 23, 2003 at 19:08:28, Jorge Pichard wrote:
>
>>For this game I used an Athlon 1.2 GHz for FRC_TheBaron and a Celeron 433 MHz
>>for Fritz 8.0.0.8. After FRC_TheBaron castled in move 14.0-0-0 Queen side Fritz8
>>did NOT wanted to continued, therefore I set Up the position from that move on
>>to allow Fritz8 to continue the game, and the game was won on the endgame stage.
>>Therefore, the Castling of FRC_TheBaron_101 did NOT affected the outcome of what
>>I expected from the stronger program using an inferior processor and with the
>>black pieces.
>
>I'm not surprised.
>
>Fritz still is a lot stronger than the Baron. The difference in HW doesn't
>really make up for the difference in strength, also in 'normal' games.
>
>The Baron FRC doesn't have special knowledge in evaluation for FRC games. The
>only FRC addition is the castling rules. There are a lot of possibilities to
>improve here, e.g:
>
>- The loss of castling queenside should probably be punished different when the
>king is on b1 then when it is on g1. Also the initial position of the bishops
>and queens (needing advancing of the pawns before they can develop) may have an
>influence on this.
>- Hardwired squares related to e.g. trapped bishops (on a7, h7) trapped rooks
>(when the king moves to f1), piece development (no knight to c3 if there are
>pawns on c2 and d4, and not on e4)
>- Piece square tables with penalties for minor pieces (and some pawns) on their
>original squares.
>
>So there is a lot of widespread knowledge in normal chess engines that do not
>apply in FRC, or should be defined differently (more generic). When engines are
>better adapted to FRC (perhaps the authors of Betsy and Chispa already took some
>measures)

I didn't do much, just modified the PSQ tables to take out the hardwired
penalties for pieces on original squares and also took out some hardwiring for
bishops like fianchettoe and trap stuff.
I agree that there are a lot of things that can be done to modify the evaluation
depending on initial setup,  I had thought about it a little, but I haven't had
a computer to work on Betsy for months now, so it has slipped my mind.

I would find it interesting to do some deep analysis of some of the starting
positions to see if there is anything forced.  Maybe MTD(f) with material only,
I remember some conversation about being able to get 30 ply like that over
night.

Regards,

Landon



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.