Blinds are at 1,000/2,000. Four players are involved in a hand with betting on each street. The hand goes to the river. The first three players check. The fourth player goes all in for their last 800. The action comes back around to the first player who originally checked on the river. Can this player raise?
I'm pretty sure he can't since the size of the all in bet is too small. But a better question is why is he not just going all in pre flop to begin with???