Razz is a form of stud poker that is normally played for ace-to-five low (lowball poker). It is one of the oldest forms of poker, and has been played since the start of the 20th century. It emerged around the time people started using the 52-card deck instead of 20 for poker.[1][2]
The object of Razz is to make the lowest possible five-card hand from the seven cards you are dealt. In Razz, straights and flushes do not count against the player for low, and the ace always plays low. Thus, the best possible Razz hand is 5-4-3-2-A, or 5 high, also known as "the wheel" or "the bicycle".[3][4] Deuce-to-seven Razz is also sometimes played (the best possible hand is 2-3-4-5-7). Razz is featured in the mixed game rotation H.O.R.S.E. as the "R" in the game's name.