H. G. Muller wrote on Thu, Apr 30, 2015 10:46 AM UTC:
Interesting discussion. All mentioned pieces are indeed Rook class. Mating
potential is in general worth only very little. I guess I can do more
accurate testing of the BD value now that I have a derivative of Fairy-Max
that takes account of pair bonuses and mating potential. The BW is worth
about 0.25 Pawn more than Rook in tests that directly compare them, and
based on the observation that pairs of color-bound pieces do not seem to
suffer from their color binding, I always assumed that a pair of BD would
be worth the same as a pair of BW.