Six-plus hold ’em (also known as short-deck hold ’em and Manila) is a community card poker game variant of Texas hold ’em, where the 2 through 5 cards are removed from the deck. Each player is dealt two cards face down and seeks to make the best five card poker hand from any combination of the seven cards (five community cards and their own two hole cards). The rules in terms of betting structures, play of the hand, and showdown are the same as in Texas hold ’em.
However, before play begins all cards 2 through 5 are removed (16 cards), thus the total number of cards in the deck is 36. Aces are high, but same as in Texas hold ’em, can make both low and high end of straights. For example, the lowest straight would be (9x-8x-7x-6x-Ax) and the highest (Ax-Kx-Qx-Jx-10x). This changes the probability of hands and alters hand rankings. (資料來源)