I think you cannot draw the conclusion that orthogonal capture is better just from the fact that mKcB can be checkmated by K, and mKcR not. This is for a large part coincidence. If the basic move of the royal had been that of a Kirin (FD) instead of K, replacing its captures by B or R would have had the opposit effect.
I think you cannot draw the conclusion that orthogonal capture is better just from the fact that mKcB can be checkmated by K, and mKcR not. This is for a large part coincidence. If the basic move of the royal had been that of a Kirin (FD) instead of K, replacing its captures by B or R would have had the opposit effect.