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Man. Moves to any adjacent square, like a King, but not royal.[All Comments] [Add Comment or Rating]
H. G. Muller wrote on Mon, Jan 30, 2017 10:57 PM UTC:

Larry Kaufman has shown by statistical analysis of a huge number of GM games that the game outcomes are optimally predicted by the following values: (P-N-B-R-Q):

100 - 325 - 325 - 500 - 975

with the caveat that a pair of Bishops is worth 700 (rather than 2 x 325 = 650). Of course the value of a Pawn is not defined very well; we know there are many kinds of Pawns, with very different values, from backaward / doubled / edge Pawns to centralized protected passers. The opening value of the Commoner in my tests would be about 310 on this scale.

And yes, those claiming it would be 4 are very much off.

It is true that piece values in themselves are already a highly simplified approximation to reality, and that the power of an army cannot be written as a plain sum over its individual pieces. The Bishop pair already shows that. The 3Q vs 7N (which was in the presence of Pawns, BTW) is another example of that.