[Lloyd]

If you had AA or KK, would you push or make a raise to around 8 or 9K?

If you were him, and a big stack pushed, what range of hands would you put the big stack on? Probably pretty big - AA-55, AK-AQ, maybe a bluff.

If you were him, and a big stack re-raised to around 8K, what range of hands would you put him on? Definitely more narrow. I'd say AA-TT, AK maybe AQ. Certainly a lower probability of bluffing.

If he has a big pair, what does he do if we push. He calls obviously. If we raise, he most likely re-raises and we might be able to get away from the hand.

If he has AQ and we push, he folds. If we re-raise. He might call with decent odds and if an A hits we might just stack him.

If he has a middle pair and we push, he might fold pre-flop. But if he puts us on the range of hands suggested he might just have the right odds to call. If we make a normal raise, he might just fold pre-flop which we'd prefer. That's because the best he can hope for is a coin flip and he doesn't have the right odds to play for a set. Against our range of hands he's probably a slight dog depending upon how big the pair is.