So I think every street is debatable in this hand. Here's some reads and history:

V1: Typical Old Texan. I've been friendly with him. He's commented a couple of times when I've raised from the SB that he doesn't think I have much but he doesn't have much either and he's folded.

V2: Typical Euro Guy. Looks mid-20s, does dumb unbalanced stuff because he wants to win pots. First or second orbit, I raised with a dead BB, he flatted SB, lead 2/3rd pot on A9dTd, led 40% pot on A turn, checked Qd river and showed 5h6d. He 3-bet me once on the button and checked back K64r, bet a T turn that brought a flush draw and took it down.

Me: I've been the 2nd or 3rd most active player at the table. I overbet once on 345c3c9s and it didn't go to showdown. I also raised turn vs a double barrel on Qh9h3s8c and checked back river on Qx with 9d6d, and won vs AhKh. I also cold flatted a 3-bet from an old man against his open and folded a KJx flop when the old guy bet smallish and I had him behind me. That's about it.

Folds to me on the button, I look down at JdJs and make it 300. V1 flats. V2 makes it 900. I...?

I'll post later streets after some discussion.

unless stack sizes dictate otherwise, re-raise to 3000 to get info., to try to get AK/AQ to fold, and to find out if you're up against QQ+. Plan to fold if he re-raises you.

stack size is?

sigh

please provide stacks sir

I don't mind flatting, you will be under-repped and in pos rest of hand. Only problem is V1 obviously calls almost all the time after you call, so it's going to be harder to define his holding later in the hand (altho from your descrip of Villain 1, that might not be a big deal seeing as you will be able to outplay him post in position) It's also nice to pot control against V2 in position who sounds like he is likely to blindly barrel a lot and u can jus call down

Also I think raising to 2,600-3k is plenty fine (I imagine in this case V1 folds every time, and V2 flats a high % of the time, and has to play oop vs you in an inflated pot), def pros and cons to both lines, just not sure which one is best in the Main Event.

assuming ~30k stacks, and against described opponent i think i'd 4b to like 2500 and expect to see 3 almost always. sometimes just call

I'm assuming all 3 are somewhere near starting stack based on it being lvl 1

V1 started the hand with close to starting stack, maybe 29,000. V2 started the hand with ~23500

I would flat. Only 4betting for value AA/KK level 1 300xBB deep. See a flop in position and probably call him down.

Pros for flatting: we get to keep a bad player in the pot OOP to us with a strong hand. We allow spazzy euro to keep the betting initiative and make some bad bets postflop with too wide a range. We keep pot small relative to stack size so we can make thinner plays without potentially crippling our stack in the mainest event of them all. We don't open the door to getting five-bet bluffed.

Cons for flatting: we get sandwiched with the worst relative position, we let SB realize his equity, we handcuff euro's ability to spazz by creating a multi-way pot, we miss value against euro's 3-bet/call range.

Did I miss anything?

^^^ sounds like the pros for flatting waaay outweigh the cons IMO...

I like the flat for the reasons described. That being said, 4betting to 2600 or so isn't a mistake-- if V1 is still in the hand then we're probably crushed, and if we get HU with V2 in position then we probably make a lot of money.

The button vs blinds dynamic in poker are such that people want to play back at eachother (especially crazy Euros) in a spot like that so if you 4 bet with JJ you can get shoved on with a wider range than usual in which case you can't really call..and I doubt he's folding AK and he might not even fold AQ because of the whole the "button never has a hand" line of thinking..flatting is a good decision, you can't overplay JJ in the first level of the main event, you're too deep

agreed

i flat here pretty much always