Red Dog is how In-Between is played in the casinos. The dealer puts himself up as the House, but deals himself no cards.
Each player places a bet, and is dealt two cards face-up. Starting with the player to the left of the dealer, the player decides whether or not he will add money to his original bet based on his first two cards. Extra wager can be added to the original bet up to the total of the original bet (i.e. an original bet of fifty cents can have up to fifty cents added to it).
Following this decision, if the player's two cards match, then the dealer deals the player a third card. If that third card is also a match, the player is paid 11:1, eleven times their bet. If that third card does not match, then it is a push (no win, no loss). If the player's two cards are consecutive, then it is an automatic push.
If the player's two cards neither match nor are consecutive, the dealer announces 'the spread' before the player adds anything to his original bet. The spread represents the amount of numbers that fall between the player's two cards (i.e. if the players two cards are a five and a nine, then it is a 3-card spread, as only Six, Seven, and Eight fall between those two cards).
Players then choose how much they wish to add to their original bet. The player is then dealt a third card.
If the player's third card falls between the first two cards, he is paid by the dealer based on the following pay-off table:
1-card spread - pays 5:1
2-card spread - pays 4:1
3-card spread - pays 3:1
all other spreads - pays even money, 1:1
If the player's third card matches either of the first two or does not fall in between the first two numerically, that player's bet is collected by the dealer.
In the game of In-Between, a player whose third card matches either one of his first cards has 'hit the post' and must pay double his bet. No such rule exists in Red Dog. A player whose third card matches either of this first two cards simply loses his bet, no more, no less.