Dont Pass Line Bet
As you've seen, a pass line bet is simply a wager that the shooter will win. But you also can bet that the shooter will fail to make a pass and thus lose. The don't pass line bet wins when he shooter throws a craps of 2 or 3, but not 12, on the come-out roll, or when he rolls a 7 before repeating his established point number. This wager loses when the come-out roll is a 7 or 11, or when the shooter repeats his point number before rolling a 7.
The don't pass line bet is the exact opposite of a pass line with on exception: Although a roll of 12 on the come out loses for pass line betters, it is not a winning number for don't pass bettors. It is a stand-off and nether wins nor loses. The reason for this is simple: If don't betters were permitted to win in this situation, they would have an advantage over the house. So by barring (disallowing) the number 12 on the come-out roll, the casinos retain a small edge. Some casinos bar the number 2, but the effect is exactly the same. Unlike a pass line wager, a don't pass bet can be removed after a point number has been established on the come-out roll.
This is because once a point is established you have an advantage over the house, thus the casino has no objections to your taking down the bet. Of course you should never do this. After going up against an 8 to 3 house edge on the come-out roll, you will have an overall average advantage of 18.8 after a point has been established.
