Karloff is dumb (and needs help with breeding)

[Karloff Foehammer]

I think i see.

So, theoretically, in example 1 the cat is hiding blonde-streaked whiskers and illume shade (i hope), because Nic is showing the whiskers and Catherine is showing the illume shade, and both are recessive to white and natural respectively?

But because the new boxes are both showing OBB ears, and you can't have a dominant hiding behind a recessive, the cats are also both hiding OBB, is that correct?

If this is the case, would incest breeding make any sense still, or am i simply reducing my chances of everything all around? If back/cross breeding does make sense still, which would be the best direction to go, since siblings might cause additional problems?

Again, 100% purity isn't really the goal as much as "significantly greater than average" chances of pulling everything.