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Mating potential and piece values[Subject Thread] [Add Response]
H. G. Muller wrote on Sun, Sep 30, 2012 11:29 AM UTC:
I now ran an end-game test of Commoner + 5 Pawns vs Knight + 6 Pawns (same
setups as with 6 vs 6 Pawns, but with the c- or f-Pawn deleted for the
Commoner (M) side. This ended in a 69.4% victory for the Knights. So N+P
have an advantage of 19.4%, while just a Knight has a disadvantage of 8.9%.
It seems a Pawn makes a difference of 28% at this late stage of the game,
and the Commoner is twice as close to N as it is to N+P. So
Commoner(end-game) = Knight + 0.33 Pawn (or ~360cP on the Kaufman scale).

So the value of the Commoner rises appreciably compared to that of the Knight when you reach the end-game. Perhaps this is what should be expected from a piece with mating potential. Or perhaps it is just because the Commoner  is so much more effective in annihilating Pawns.

I am now testing the same end-game setups, replacing the Knight by a Bishop.