Sorry about this.

1) The "case card" is the last one in the deck. In this particular instance, you've got a 2 in your hand and there are two on board, so there is one out there, either in villain's hand or in the undealt cards.

2a) If you're asking about what Ax means, it means an ace and any other card. ie, AQ, A7, A2, etc. Note that this could be suited or unsuited. Axs would mean a suited ace (eg: Ac2c, As9s).

2b) If you're asking what I mean about Ax making up a "pretty small part of a very, very wide range," what I mean is that if you laid out all the cards that villain can have, given the action up to this point, the number of Ax hands will be small in relation to all the cards possible.

For example, suppose you know that villain limps 100% of their range, preflop action is villain limping from the SB/BTN, and you check behind with AA (don't ask me why), flop comes JJJ. There are precisely 46 hand combinations villain could have that are Jx (the last Jack matched with every other card you cannot see), but their entire range consists of 1,326 possible hand combinations, so the villain is about 3.5% likely to hold the hand you're worried about and so you're 96.5% likely to be ahead here.

3) OTF means "On the flop." Some other acronyms you might want to become familiar with are:

OTT: On the turn.
OTR: On the river.
PF: Preflop.
IP: In position (SB/BTN when playing HU).
OOP: Out of position (BB when playing HU).
GII: Get it in, get all the money into the pot.
FFS: For f*ck sake. =)

glgl

glgl?

Haha. Leveled myself.

gl: Good luck