Spit, also known as Speed, is a two-player card game in which the aim is to get rid of your cards as fast as possible. Players do not take turns - physical speed and alertness are required to play faster than your opponent.
To get rid of cards, a player can play a card from one of his piles onto one of the two center piles, the players play cards from their five piles on to one of the center piles. Cards can only be moved one at a time, and can only be placed on the center piles if it is either sequentially one above, or one below the card. For example a Jack may be placed on a Ten or a Queen, a Six on a Five or a Seven and a King on a Queen or Ace.
Once there are no more cards to play, both players signal that they are ready (in the iPhone version, this is done by tapping on your side pile). Once both players are ready, a card is moved from each of their Stacks on to the corresponding Center Pile. Game play then continues with the new center pile. If a player has no cards left in their stack, a card is only moved from the other stack. If both stacks are empty, the round ends.
Once either player has finished all of their five piles the round ends. Once the round has ended, each player must take a center pile which will then be combined with his remaining Stack and five piles for thew next round. As the game is about getting rid of your cards, each player obviously tries to take the smaller pile. In the iPhone version, to take a pile, simply drag it to your side of the screen.
In order to help players play faster, they are allowed to rearrange the cards in their five piles. Cards with the same value (i.e. Kings or Fours) may be placed on top of one another, and any card may be moved to an empty pile.
If a round begins where one of the players has no cards in their Stack, a Joker is placed in the corresponding center pile. If a player takes that pile at the end of the round, their number of cards for the next round are only the ones in their Stack and five piles. If their stack is empty, and they have no cards left in their piles - they would be starting the next round with zero cards, and therefore win by succeeding in getting rid of all their cards.