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The deal and the deck
A standard 13-card rummy hand uses one or two decks plus two printed jokers, depending on the table size. Two-player tables use a single deck; three- to six-player tables use two decks shuffled together, which is what makes the wild-joker mechanic genuinely useful. One card is flipped face-up at the start of the hand and becomes the wild joker; the printed joker stands in for any card, and the wild joker stands in for the rank-and-suit of the face-up card.
The number of cards in a hand is fixed at 13. Each player draws one card at the start of their turn and discards one to close it. A turn that fails to do either is technically a missed turn under most house rules and may carry a penalty on a timer-driven table.

The draw, the discard, the cycle
A turn has three decisions: take from the closed deck or the open discard, hold or release a card, and whether to declare. Taking the top of the discard pile commits you to keeping that card; you cannot take and immediately discard the same card. This rule is what makes the discard pile readable, because every card on top of it has been chosen by someone who did not want it.
On a 30-second timer, a hand lasts between two and nine minutes depending on the format. The shorter the format, the more the cycle of draw and discard dominates; the longer the format, the more the table talk and the drop math start to matter.
Meld, sequence and the joker rules
A meld is a group of three or four cards forming a valid set or a valid run. Sets are the same rank, different suits; runs are the same suit, sequential ranks. The joker rules distinguish between pure and impure melds and they are not interchangeable. A pure sequence, a run with no joker, is mandatory in any valid declaration; the rest of the hand can be made of impure melds, sets with one joker standing in for the missing card, or pure melds.
The trap is over-using jokers. A clean set is worth more than two impure ones, and the deck can run out of jokers faster than the table realises. Strategy notes from the desk recommend keeping a running count of jokers in play.

The show and the declaration
A declaration is the grouping of all 13 cards into valid melds with at most one leftover card. The leftover card is placed face-down on the table and is worth its face value in points rummy and zero in pool formats. A declaration without a pure sequence is invalid regardless of how many points the rest of the hand collects; the rule is the floor, not the ceiling.
On a regulated table, the show button is logged with a server-side timestamp. The first valid declaration wins. A second declaration in the same cycle is dropped by the platform and the first player is paid. This is one of the few platform mechanics the desk treats as load-bearing for fairness.

