Simple chess program to strip off it's eval function?

[luisrodg]

Hello,

Im looking for a simple open source chess program such that I can strip off it's eval function and have it only consider material and nothing else. I want to put such a program to play on a server and observe it's erratic play and see what elo it would achieve.

Stupid, yes, but it's just something that's been in my mind and would love to take on this "stupid" project.

Would love a simple program because my programming techniques are limited.

Thanks.

[Michael Sherwin]

In RomiChess the evaluation is very cheap and the node rate high. Just have the Eval() return wMat - bMat sign flipped if it is black to move.

To not use learning type in console mode:

book_off

learn_off

quit

[luisrodg]

In the last line of the eval file, I changed:

return wtm ? score : -score;

to:

return wtm ? (wMat-bMat) : (bMat-wMat);

[Michael Sherwin]

And is that what you wanted?

[luisrodg]

Yes !

And just like i conjectured, having only material evaluation coupled with a fast search yields a very good play in the middle game.

[Dann Corbit]

Yes !

And just like i conjectured, having only material evaluation coupled with a fast search yields a very good play in the middle game.

I guess that this very good play is inferior to the play with the rest of the evaluation enabled and everything else the same. Did you test it?

[hgm]

What exactly does "material only" mean here? Is that Piece-Square tables? Or does it only account for piece base values? Is the Bishop pair included?

[Dann Corbit]

What exactly does "material only" mean here? Is that Piece-Square tables? Or does it only account for piece base values? Is the Bishop pair included?

If I understand him correctly, he means to count the wood only.