If a player rolls an acey-deucey (= a 1 and a 2, also called an Ace and a Deuce), he plays the 1-and-2; then they choose any number from 1 to 6 and act as if they had just thrown a doublet of it; then that player takes another turn.

An ace can be the lowest card of a straight (ace, 2, 3, 4, 5) or the highest card of a straight (ten, jack, queen, king, ace), but a straight can't "wrap around"; a hand with queen, king, ace, 2, 3 would be worthless (unless it's a flush).

Please note that even though there is no direct law against online casinos in Thailand, they are still considered to be prohibited by the government officials. So, do not get involved in any kind of gambling activity other than the legal ones to be safe.