preflop aggression

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there are standard hands that are profitable to play from the button (open-raise or open-call) vs. standard opponents. If they play back much, preflop or after, one can't open as often, while if the blind(s) keep folding too much, then one can open with more hands. Just a math question though one may find a better spot to put one's money on the line in tournaments. But even in tournaments one likely does better by stealing blinds when one should be stealing blinds; all top players do it and some of them do not ask much anything from their hands to do that.