Its multi day MTT, we´re on 2d (final day 1). Table wasnt too tough except 1 or 2 spots (RIO's own Sam Grafton was in seat 7, but irrelevant to this hand). This was first level, about 10 hands in. UTG has opened or been in every hand, BB no history and may have been in one non descriptive hand/ he was mid 20s Euro & didnt appear touristy so maybe an online reg. Im in SB and have been in 3 hands, showed down 1 with nuts and 2 other standard spots like BU and BB defend.

25/50, 5K is effective. UTG opens 150 folds to me in SB, I make 400, BB calls & OR completes. Flop comes J-high rainbow (think was Jd4s9h), I go 900 and only BB calls. Turn 7s...

here is the first spot- what range do I put BB on? what am I repping here? bet sizing??? I cant see him there with T8 based on pf action or 44, think we get 4b some of the time with his over pairs. So I have him on 88-JJ, AJ+, does this sound reasonable???

Turn I go 1675, he calls (would you ever pile here, repping bluffs?)... in my mind it confirms his range. River is a random spade (3s I think).

What is your play here? I could pile for value, but there is a chance he could get away from his 88, TT, AJ+ hands... I could check to induce some of his bluffs, making my hand look like AK. I guess we could bet small to protect/block JJ/99/AJss from doing anything weird. If he piles over a small bet I hate life I think.

I opted to check. He looks at me surprised and said 'you checked?' I nodded. He rips... I tank and tank replaying the hand to see if I needed to find the fold button. But then thought this is exactly why I checked so I got the result I wanted and we had Ks for a tiny bit of spades blocker, but dont even consider it... so I gutted it and called. His hand will be revealed later.