Rules Quick Reference
๐ Classic Mahjong
| Tiles | 136 tiles: characters, dots, bamboo 1-9, winds and dragons, 4 copies each. |
| Melds | chi = sequence (left player only) ยท pon = triplet ยท kong = 4 of a kind + bonus draw. |
| Winning | Win with 4 melds + a pair, seven pairs, or thirteen orphans. Tsumo (self-draw) or ron (off a discard). |
| Scoring | Practical subset of the International Standard fan list (ๆธ ไธ่ฒ, ๆททไธ่ฒ, ็ขฐ็ขฐ่ก, ไธๅฏน, ไธๆก้พ โฆ). |
| End of hand | Hand ends on a win or an exhaustive draw. |
๐ Riichi Mahjong
| Tiles | Same 136 tiles. Terminals (1/9) and honors = ๅนบไน็ (yaochuu). |
| Yaku | You must have at least one yaku to win: riichi, tanyao, yakuhai, pinfu, chiitoitsu, honitsu, chinitsu โฆ |
| Riichi | Declare on your discard when concealed + tenpai; place a 1000-pt stick; hand locks. |
| Dora | Bonus tiles add 1 han each โ but dora is not a yaku. |
| Furiten | If any winning tile is among your discards, you cannot ron (tsumo only). |
๐ American Mahjong
| Tiles | 152 tiles: bam/crak/dot 1-9, winds, dragons, 8 flowers, 8 jokers. |
| The card | Match one yearly-card line: a quint/kong/pung (+ pair) and isolated singles โ exactly 14 tiles. |
| Jokers | Jokers substitute inside pung/kong/quint/sextet only โ never as a pair or single. |
| Charleston | Pass 3 tiles right โ across โ left before play. Jokers may never be passed. |
| Payout | Ron: discarder pays 2ร (4ร without jokers); tsumo: everyone pays 2ร (4ร without jokers). |