The Big 6 and Big 8 Bets
The big 6 bet is a wager that the 6 will be rolled before the 7 will. If any other number is rolled it does not effect the result and the dice are rolled again. Consequently, the big 8 bet is a wager that the 8 will be rolled before the 7 is. These two bets could be made at any stage of the game, including on the come-out roll.
Odds and Probabilities
The winning odds for the big 6 as well as for the big 8 pay even odds. For every dollar you wager you get a dollar. The real winning odds in favor of the house are 6 to 5, so the house edge is roughly 9% on both bets, which is rotten. Both bets are not considered the best online craps bets you could make and place bets are more recommended and have a higher chance of winning. You could just easily make a 6 or 8 place bet and get better odds for a payout and concede a much smaller house edge.
The reason people place big 6 and big 8 bets is that it is in a conspicuous spot on the lower corners of the online craps table. Betting the big 6 and big 8 is a sign to other players that you know little of the rules of craps If you want to play online craps, avoid the big 6 and big 8 bets.
Tomas Hick, Strategic Analyst