rummy rules 13 cards 13 cards rummypure sequence; according to the 13 card rummy game rules, a player needs to make at least one pure sequence to win. a pure sequence includes a run of at least three cards having the same suit. for e.g.: k♥ q♥ j♥ (no wild cards or jokers have been used here.) sequence 13 cards rummy rules for impure sequence. impure sequence