Well, directional modifiers are different, as some directions must be specified by a pair of them. And h has no meaning of its own, unlike i and n, and kc and ck do mean the same. (It is just that plain k means capture King only, and the other capture everythin but King, so that k is a toggle.)
I am sure you can think of something that moves according to any kind of rule, no matter how far fetched... But the fact that you don't know any variant that already requires it is more significant. The ID can already handle this case, should it arise, by immediately morphing the piece that is originally present into another one that does have the move you want it to acquire. So there really is no need for an i in the first place; that XBetza supports it is only because it is so common.
Well, directional modifiers are different, as some directions must be specified by a pair of them. And h has no meaning of its own, unlike i and n, and kc and ck do mean the same. (It is just that plain k means capture King only, and the other capture everythin but King, so that k is a toggle.)
I am sure you can think of something that moves according to any kind of rule, no matter how far fetched... But the fact that you don't know any variant that already requires it is more significant. The ID can already handle this case, should it arise, by immediately morphing the piece that is originally present into another one that does have the move you want it to acquire. So there really is no need for an i in the first place; that XBetza supports it is only because it is so common.