- Setup. 2 players, 10 cards each. The top of stock is flipped to start the discard pile.
- Turn. Draw the top of stock OR top of discard. Then discard one card.
- Melds. 3+ same rank (Set), or 3+ same-suit consecutive (Run).
- Deadwood. Cards NOT in a meld. Card values: A=1, 2–9 face, T/J/Q/K=10.
- Knock. When discarding, knock if your deadwood ≤ 10. You score the opponent's deadwood minus yours.
- Gin. Deadwood = 0 → +25 bonus + opponent's deadwood.
- Undercut. If after a knock the opponent has equal or less deadwood, THEY score +25 plus the difference.