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Schoolbook. 8x10 chess with the rook + knight and bishop + knight pieces added. (10x8, Cells: 80) [All Comments] [Add Comment or Rating]
H. G. Muller wrote on Mon, Jun 30, 2008 05:17 PM UTC:
The table was actually given in my first post in that thread. It might be burried very deep under what unfortunately followed. I am sorry about that, it arose from Derek taking it as a personal offense when I pointed out that the values he derived from elaborate theoretical arguments were no good in practice. So let me repeat the table:

P =  85
N = 300
B = 350 (B-pair bonus = 40)
R = 475
A = 875
C = 900
Q = 950 

I usually normalize on the Q value, as Pawns come in many forms (doubled, isolated, backward, passed, doubled, edge), with extremely different values. So giving a value for the Pawn wouldn't mean a thing if you don't tell at the same time which kind of Pawn. All values above are opening values, where the Pawn is f2/f7 in the opening array.

The values were empirically derived from playing 20,000 games starting from opening setups where selected pieces were deleted from the array to create a material imbalance.

Rooks are known to be orth a lot more in end-games than in the early opening, so the Rook value might be higher than given here during most of the game.