Oklahoma Gin Rummy Rules & Scoring
Oklahoma Gin is the most popular tournament variant of Gin Rummy. The standard rules of dealing, melding, knocking, and going gin all carry over — but the first up-card of each hand controls how aggressively you're allowed to knock, and a spade flipped as that up-card doubles the entire hand's score. Those two twists make Oklahoma Gin sharper, faster, and more dramatic than the base game.
How Oklahoma Gin differs from standard Gin Rummy
In standard Gin Rummy, a player can knock any time their unmatched cards (deadwood) total 10 points or fewer. Oklahoma Gin replaces that fixed 10 with a per-hand limit set by the up-card — the card turned face-up at the start of the hand to begin the discard pile. The rank of that card becomes the maximum deadwood you're allowed to hold when you knock.
The up-card sets the knock limit
After the deal, the top card of the stock is flipped face-up to start the discard pile. In Oklahoma Gin, that rank is the knock ceiling for the entire hand:
- Number cards (2–10): their face value is the maximum deadwood. A 7 up-card means you must have 7 or fewer deadwood points to knock.
- Ace up-card: the most aggressive variant — players must go gin (zero deadwood). Knocking is not allowed.
- Face cards (J, Q, K): count as 10, so the hand plays like standard Gin Rummy.
Tight up-cards (Ace, 2, 3) heavily favor whoever draws the cleanest hand. Looser up-cards (8, 9, 10, or face) play like a normal Gin Rummy round.
The spades-double rule
If the up-card is a spade, every score in that hand is doubled — the knock points, the gin bonus, the undercut bonus, and any line bonuses applied at the end of the game. This is the rule that gives Oklahoma Gin its signature swing: a spade up-card on a tight rank can decide a match in a single deal.
Doubling is applied once per spade up-card. Some house rules stack doubles when the up-card is the Ace of Spades (combining "Ace = must gin" with "spades double"), but the common tournament rule is a single doubling.
Scoring after the hand
Once a player knocks or goes gin, scoring follows standard Gin Rummy rules with the up-card multiplier applied at the end:
- Knock: the knocker scores the difference between the opponent's deadwood and their own.
- Gin: the knocker scores all the opponent's deadwood plus a 25-point gin bonus.
- Undercut: if the defender's deadwood (after laying off on the knocker's melds) is equal to or less than the knocker's, the defender scores the difference plus a 25-point undercut bonus.
- Spade up-card: double the total score for the hand.
Worked example
Up-card is the 6 of Spades. Knock limit is 6 deadwood, and the hand will double. Player A knocks with 4 deadwood; Player B is left with 18 deadwood after laying off. Player A scores 18 − 4 = 14, then doubles to 28 points.
Same setup, but the up-card is the 3 of Hearts. Knock limit is 3, no doubling. Player A goes gin (0 deadwood); Player B holds 22 deadwood. Player A scores 22 + 25 (gin bonus) = 47 points.
Game end and line bonuses
Oklahoma Gin is usually played to 100, 150, or 250 points. At the end of the game, the winner typically adds:
- Game bonus: 100 points for reaching the target.
- Line / box bonus: 25 points per hand won during the game.
- Shutout (skunk): double the loser's total if they never scored.
If the final hand's up-card was a spade, the spade-double rule applies only to that hand's score, not to the end-of-game bonuses.
Strategy notes
Low up-cards reward defensive play — hold low cards, discard high, and watch what your opponent picks up. High or face up-cards play like standard Gin Rummy, where getting to a knockable hand quickly usually beats waiting for gin. With a spade up-card, the upside of going gin (or catching an undercut) is doubled, so taking a marginal risk to chase gin is more often correct than in the base game.