I'm not sure that's a good idea at all for training, though it is a really neat trick. For training you really want your good moves to be rewarded and your bad

I'm not sure that's a good idea at all for training, though it is a really neat trick. For training you really want your good moves to be rewarded and your bad moves pointed out, but if the AI just plays up or down to match what you do instead, there's no signal getting back to you on how you're doing.