Multiplayer Spades

This game is played by 4 players. Each player is dealt 13 cards and the game is played trick by trick. The player who starts the trick lays one card, and the other players must follow suit if he can. The player who layed the highest numbered card (A is the highest, 2 is the lowest) wins the trick, and starts the next round. Spades are trump cards, so if a player has played a spade and it is the highest ranked spade in that trick, then he can win