Rummy Rules Learn How to Play Rummy Game RummyCultureRummy Rules. Here are some essential Rummy rules to keep in mind: Pure Sequence: It is mandatory to have at least one pure sequence to make a valid declaration. Sequence and Sets: Apart from the pure sequence, the rest can be sequences or sets. For example, a hand might have a sequence of Ace of Spades, 2 of Spades, and 3 of Spades, along with