Rule for bets when someone is all in

[mrmookid]

hachkc,

$16 is more than $15 (and that is why you consider this to be a raise)

However a raise in Hold'em must equal AT LEAST the big-blind. If faced with a raise the minimum re-raise is the amount to call PLUS the amount of the last raise.

Or just think of it this way.

Blinds are 10/20. I am first to act. I can either fold, call the $20, or raise. If I raise I cannot raise $1 (making it $21). I must make the raise at least $20 (making it $40 to play)