[tewall]

The call is correct if the pusher is playing optimally, which few players do. Players tend to push too little in these situations, so calling would probably be a poor choice without knowledge of the opponent. If the player has pushed several times already, however, you have evidence that he pushes more than optimal, then calling is +EV.

In a heads up match with stacks = 10 BB optimal strategy is pushing with top 70% and calling with top 40%, according to some previous threads on this subject, I can't remember the poster. He did extensive simulated matches, and determined the best ratios that way. He said it didn't matter if you varied from optiaml play very much, however, unless you were quite a bit too timid or too aggressive.

According to pokerstove, K6s is in top 24%.