[registrar]

Because he folds a lot of hands he bets on the flop and that he calls on the flop. We can lead quite small on the turn and he has to decide then whether he really wants to put his tourney life on the line with an oversuit or pp+suit. It's horrible thing for him to face with pretty much any holding: PFR cc's flop and leads turn small.

I'm defintely check-calling the flop. I don't like check raise on the flop but this is effectively a delayed check-raise for the same reasons that will get called by fewer naked diamonds.