What would happen if you tell the opponent that you are going to steal. No doubt about it, you will steal. (The opponent is likely to believe you, because it would be unreasonable for you to say you will steal and then split.) Then you tell your opponent that if he/she wants the money, then he/she must split. Then once the money is won, promise to write a check for 1/2 the amount. Would the opponent be more willing to trust you because they have very little recourse, or would they be more likely to sanction you for strong arming the interaction?