PokerStars No-Limit Hold'em Tourney, Big Blind is t30 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB (t970)
BB (t1065)
UTG (t585)
UTG+1 (t1755)
MP1 (t2515)
Hero (t2375)
MP3 (t1095)
CO (t1605)
Button (t4525)

Preflop: Hero is MP2 with A, K.
UTG calls t30, UTG+1 calls t30, 1 fold, Hero raises to t120, MP3 calls t120, CO calls t120, Button calls t120, 2 folds, UTG calls t90, UTG+1 calls t90.

Flop: (t765) 2, J, 5 (6 players)
UTG bets t465 (All-In), UTG+1 folds, Hero calls t465, MP3 folds, CO calls t465, Button calls t465.

Turn: (t2625) A (4 players, 1 all-in)
Hero bets t600, CO folds, Button raises to t2580, Hero ????

I'm new to the table so I don't have much in reads but this guy has played every pot. Could I be up against a set?

Fold the flop. As played, snap-call the turn.

You don't have much left and the pot is huge.

Call.

Though, I lead the turn for more, making this decision beyond easy.

Pop it to at *least* 180 preflop if you are going to pop it at all.

Fold on that flop.

Call that turn.

In fact, either raise to 180 preflop or just ship it all in preflop. 105 free chips is nothing to sneeze at, and we get called by a *lot* worse than AK, anything besides a pocket pair we got in bad, bad shape.

As for your question, there are 6 players in on the flop. I can't even begin to explain how difficult it is to assign ranges to any of them. Just do this: envision the one hand you don't want to see, and it's 75/25 that one of them has it. I wouldn't be surprised to see Aces up and a made straight here. The chip leader sailing his whole nest egg into the middle over the top of your bet should let you know you are probably drawing dead to a straight or set.

I like your idea of raising to 180, but shoving sucks..like really bad..thats a massive, massive overbet..Don't do that

As for everything else you said, pretty spot on..Fold that flop everytime

I probably ship it in on the turn..We have like 800 less than the pot at that point and thats the 2nd best card we could see

That's a bad, bad situation. You got 5 callers to your 4BB raise, so you have to be concerned about that flop hitting a PP. On the turn AJ is definitely within Button's range (even A5s or A2s). Definitely bail on the flop with just overcards and 2 people still to act behind you.

Do NOT shove preflop. You will possibly be going into a race, witch is very unneccesary at this level. You have an avarage chipstack, preserve it till it is more to gain.

Raise 150-180 preflop.

A 6-way flop with AK is not good. Fold.

As played:
If you fold, you have 1190 left.
If you call and lose, you have 0 left.
If you call and win the side pot, you have 3580 left.
If you call and win, you have 6205 left. Correct me if I'm wrong here

You have to call.

("Hero bets t600, CO checks?" What?)

Lol. I change to Barry avatar and now I have to <sw> everytime I say shove?

To qualify: I'd rather see 5 cards for all the chips against 1 opponent than see 3 cards for 5% of my stack against 6 opponents OOP.

Here's a fun pop quiz: Suppose in that same situation we limp along with AK and one of the blinds pops it to 200 or so, and it's folded back to us? Can we narrow his range to the point that we would either a. ) fold b. ) shove all in, or c. ) flat call and see 3 cards?

What happens if one the two limpers flat-calls ahead of us? If both do?

(I feel like a teacher that just assigned homework at 2:20 on a friday)