Page "Oh, hell" Paragraph 35

* Trick scoring: Each player that scores the number of tricks bid receives that many points, with the exception of correctly bidding 0, in which case the player receives a half point.

Any overbid or underbid loses the number of points their bid was off ( a player bidding 3 tricks that wins only 2 would lose a point, as would a player bidding 2 and winning 3 ).