[PartyGirlUK]

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no, I haven't. The way he plays in my hands is similar to what has been described (rarely check/calling river etc.). I'll hopefully get some hands up today that I can comment on, but for now I would say that if this guy is cheating, he is doing it in 2 main ways:

1) Very rarely calling down with ace high, king high, or very small pairs when he is beat.

2) Attacking when his opponent has air that can't withstand aggression.

Obviously, it is pretty difficult to prove that someone doing these two things is cheating.

I have a large number of hands where he makes plays that are not optimal given that he knows my hand. For example 3betting the turn with 2nd pair when I have top two. This could of course be cover up though.

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That's basically how I felt when I played Mark Seif - he played almost like he could see my cards, but did make a couple of FTOP suboptimal plays.