Koi-Koi
A traditional Japanese card game played with Hanafuda (flower cards) — a 48-card deck of twelve suits, one for each month, each illustrated with the flowers or plants of the season. The game dates to the Edo period, when playing cards were banned and reinvented as these beautiful floral tiles.
This is Koi-Koi, the most popular Hanafuda game. Capture cards by matching months, build scoring combinations called yaku, and decide whether to bank your points or call "Koi-Koi!" to keep playing for more — at the risk of losing everything.
How to play
Each round, you and the AI are dealt 8 cards. 8 cards go face-up on the field. On your turn:
- Play a card from your hand. If it matches a field card by month, you capture both. If not, it goes to the field.
- Draw a card from the deck. Same matching rules apply.
When you complete a yaku (scoring combination), you choose: Stop to bank your points, or Koi-Koi to keep playing for a bigger score — but if the AI scores first, you get nothing. See the Yaku panel below for all scoring sets.
Yaku (scoring sets)
+ 3 of 
Card art by Louie Mantia (CC BY-SA 4.0)