Game guide · BJDHZK
Find your footing in Gin Rummy
Take a moment to read the table. Build sets and same-suit runs in a ten-card hand, then knock with 10 or fewer deadwood points or go Gin with none. Return to the explanation when a decision is unclear. Look at the complete hand before deciding. The game uses a single 52-card deck with no jokers. Both players receive 10 cards. Aces are low and count 1. Take the next action only when the current step is clear.
Two-player game against a computer. Fixed house scoring: 25-point Gin and undercut bonuses; first to 100, no line/game bonus. The starting player alternates each hand. Big Gin is not included. Current hands save locally.
Practice beyond the first move
Use the rule sheet as a reference. The starting player may take the upcard or pass. If both players pass, the starter must draw from the stock. The same rule applies on a phone and on a computer.
The challenge in front of you
Build sets and same-suit runs in a ten-card hand, then knock with 10 or fewer deadwood points or go Gin with none. Return to the explanation when a decision is unclear. Take a moment to read the table.
The order of play
- The game uses a single 52-card deck with no jokers. Both players receive 10 cards. Aces are low and count 1.
- The starting player may take the upcard or pass. If both players pass, the starter must draw from the stock.
- Draw one card, then select a different discard when you took from the discard pile. Melds stay in your hand during play.
- Choose Knock / Gin with a selected discard. After discarding, deadwood must be 10 or less. Otherwise continue playing.
- Against a knock, the defender may group cards and lay off unmatched cards on the knocker’s melds. No layoffs are allowed against Gin.
- Gin earns 25 plus defender deadwood. A successful knock earns the difference. A defender with an equal or lower count undercuts for 25 plus the difference.
- The first player to reach 100 points wins this match. There are no additional line or end-of-match bonuses. A stock reduced to two cards ends a non-knocking hand with no score.
How to interact with the game
Tap a card to select it. Use the labelled pile and action buttons. Sort by rank or suit; the hand wraps onto additional rows on a phone. Check the relevant controls before continuing. For a calm first round, focus on one decision.
Put the rules into context
A knocker with 8 deadwood against a defender with 5 after layoffs is undercut: the defender scores 25 + 8 − 5 = 28. Use another round to revisit a decision.
Where a round can go wrong
A clear plan starts with the current position. Q–K–A is not a Gin run: Aces are low. A defender cannot lay off against Gin, and a picked-up discard cannot be returned on the same turn. Check the relevant controls before continuing.
Answers about the rules and controls
What is the aim?
Build sets and same-suit runs in a ten-card hand, then knock with 10 or fewer deadwood points or go Gin with none. Take a moment to read the table. Take the next action only when the current step is clear.
How do I use the controls?
Tap a card to select it. Use the labelled pile and action buttons. Sort by rank or suit; the hand wraps onto additional rows on a phone. Take a moment to read the table. Use another round to revisit a decision.
Which format is available?
Two-player game against a computer. Fixed house scoring: 25-point Gin and undercut bonuses; first to 100, no line/game bonus. The starting player alternates each hand. Big Gin is not included. Current hands save locally. Use the rule sheet as a reference. Take the next action only when the current step is clear.
What should I check before a move?
Q–K–A is not a Gin run: Aces are low. A defender cannot lay off against Gin, and a picked-up discard cannot be returned on the same turn. Begin with the objective. Use another round to revisit a decision.
Can you give an example?
A knocker with 8 deadwood against a defender with 5 after layoffs is undercut: the defender scores 25 + 8 − 5 = 28. Look at the complete hand before deciding. Check the relevant controls before continuing.
When may I knock?
After drawing, select the card you would discard. The remaining 10 cards must have no more than 10 deadwood points. Begin with the objective. Check the relevant controls before continuing.
How much is an Ace?
An Ace is worth 1 and only starts a run: A–2–3 is valid, Q–K–A is not. Take a moment to read the table. Use another round to revisit a decision.
What happens on a deadwood tie?
Unless the knocker went Gin, a tie is an undercut; the defender scores the 25-point bonus. Look at the complete hand before deciding. Return to the explanation when a decision is unclear.
Are layoffs automatic?
Yes. The result searches the defender’s legal groups and possible extensions to find the least remaining deadwood. Look at the complete hand before deciding. The same rule applies on a phone and on a computer.
Can a hand end without a winner?
Yes. When the stock is reduced to two and the active player ends the turn without knocking, the hand has no score. Treat this as a chance to practise one rule. Check the relevant controls before continuing.