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H. G. Muller wrote on Wed, Oct 19, 2011 12:02 PM UTC:
Well, I don't see much reason to assume that the piece values in Grand Chess are very different from the very well established values in Capablanca and other 10x8 variants. It is true the board has two more ranks, but these are basically ranks where you don't want to go.

This would mean your values suffer from a gross uderestimation of the value of the Cardinal (BN), which in Capablanca is practically equivalent to the Marshall (RN). That there is logic in your system can be considered a drawback, as so far any logic in the practical values of pieces has been sigularly absent (or perhaps just not understood).

If I would have to guess in which direction the Capablanca values should be corrected for Grand Chess, the major factor I would take into account is the fact that the promotion zone is 3 deep, effectively cutting 1 rank off the board. This makes that you are more in a hurry with lateral movements to stop passers, which disadvantages pieces that cannot slide along ranks.

 FIDE 10x8  Grand(?)
N 325 300 -> 275
B 325 350 -> 325 (+50 B-pair bonus)
R 500 500
C     875 -> 850
M     900
Q 950 950

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