New combination
Koi-koi: you keep playing to score higher, but if the AI scores before you do, its points are doubled.
Koi-koi rules
The deck has 48 cards, four per month. Each month has its plant; some cards are worth more: 5 lights, 9 animals, 10 ribbons and 24 plain cards. The small number in the corner shows the month.
Your turn
Play a card from your hand. If a card of the same month is on the field, you take both. Otherwise, your card stays on the field. Then you turn over the top card of the deck and do the same with it. Two possible cards: you choose. Three cards of the same month: you take all four.
Koi-koi
As soon as your captures form a new or better combination, you choose: stop and score, or call koi-koi and keep playing. If your opponent scores after your koi-koi, their points are doubled. A round worth 7 points or more is doubled too. If both hands run out and nobody stopped, the round is a draw.
Combinations
| Gokō all 5 lights | 10 |
| Shikō 4 lights, without the man with the umbrella | 8 |
| Ame-shikō 4 lights, with the man with the umbrella | 7 |
| Sankō 3 lights, without the man with the umbrella | 5 |
| Hanami-zake cherry curtain and sake cup | 5 |
| Tsukimi-zake full moon and sake cup | 5 |
| Ino-shika-chō boar, deer and butterflies; +1 per extra animal | 5 |
| Akatan-aotan the 3 poetry ribbons and the 3 blue ribbons | 10 |
| Akatan the 3 poetry ribbons; +1 per extra ribbon | 5 |
| Aotan the 3 blue ribbons; +1 per extra ribbon | 5 |
| Tane 5 animals; +1 per extra animal | 1 |
| Tanzaku 5 ribbons; +1 per extra ribbon | 1 |
| Kasu 10 plain cards, the sake cup counts too; +1 per extra card | 1 |
A deal with four cards of the same month on the field or in one hand is dealt again.