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In bigger MTT's, one thing I've started doing lately is making some aggro blind plays and then open completing, say, A7 or K9 or something.

I've had more people raise my Axx/Kxx minbet with air and then push on the turn in the last two weeks than I can count. Because, you know, I completed so I can't have an ace.

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How big of a stack do you need for this?