This is known as the cancellation system. Pick a series of numbers, say 1,2,3,4,5. Your first bet is the total of the two numbers on the end, or 6 units in this case. If you lose it, you cancel out the 1 and the 5, add the six to the end of the series and bet the 6 and the 2, for a total of eight units bet. Lose that one and you add the eight to the series, cancel the 2 and the six and bet a total of 11 (3+8) and so on. If you win, you proceed to the inside numbers until they are all cancelled out. Again, a loser, but an insidious one.

You win after the first roll if the shooter rolls a seven before making his point. you lose if the shooter successfully make his point. For example, if the shooter's "Come Out" roll is an eight, the shooter continues to roll until an eight or seven is rolled. A roll of eight loses, a roll of seven wins. All intervening rolls are irrelevant to the "don't pass line" bet.Once either the seven or point has been rolled, the next roll becomes the new "Come Out" roll.