A short Limit quizlet

You pick up KQ off in the small blind and it is passed round to you.

You limp.

BB raises. You know that he is likely to do this with about 70% to 80% of his hands (i.e., anything not truly dreadful).

You call.

Flop comes J J 3 rainbow.

You check.

Opponent bets (which he will do 99% of the time. He will only check if he has you utterly strangled with something like AJ, JJ or J3)

You check-raise.

Opponent calls.

Turn is an Ace.

You bet.

Opponent folds.

Now. Here's the question.

Without looking at Pokerstove, when you check-raise this flop, are you

a) bluffing?
b) semi-bluffing?
c) betting for value?


Other minor questions.
1) What is the logic behind limping the small blind rather than raising?
2) Why check-raise the flop rather than bet out or check-fold?
3) Why bet the turn when the Ace fails to help you and might well help our opponent?



Later: Elvis Vs Wittgenstein. Is "You Ain't Nothin' But A Hound Dog" a valid proposition, or merely a corollary to a fact?