Create a den of thieves with matching pairs, but avoid Old Bill by outwitting and outwitting the other Masterminds! The player who gets the most matching pairs of thieves (two cards with the same picture) wins, but watch out for Old Bill! If you end up with him in your hand, he'll remove one of your matches!

Players will draw cards and either play or trade them to make matches. Old Bill will remove some of your matches.

The game continues until a player takes the final card from the deck. This is now the last round, in which each player makes one last move.

Players will now count the number of pairs they have managed to make in their area for the score. If a player ends up with any number of old bills in their hand, they must remove one of their scoring pairs. The player with the most pairs of thieves wins! If there's a tie, add up the ranks across your paired pairs, counting the pair's rank only once, not both Thieves within a pair. Whoever has the highest total score wins the game! If there's still a tie, the win is split.

You can also use this game for a classic game of Old Maid (with ole' Bill) or Memory with the whole family.