Mahjong (Riichi)

Tiles and Hand Construction

Played with 136 tiles: Man (Characters 1-9), Pin (Circles 1-9), Sou (Bamboo 1-9), Winds (East, South, West, North), and Dragons (White, Green, Red).

• Four players aim to build a winning 14-tile hand consisting of 4 melds (sequences or triplets) and 1 pair (or special hands like Chiitoitsu or Kokushi Musou).
• Players start with 30,000 points. Match format is Hanchan (East and South rounds) or Tonpuusen (East only).

Calls and Riichi

• Chi: Claim a discard from the player to your left to complete a sequence.
• Pon: Claim a discard from any player to complete a triplet.
• Kan: Claim or declare four identical tiles, drawing a replacement from the dead wall and revealing an extra Dora indicator.
• Riichi: Declare tenpai (one tile away from winning) with a concealed hand for a 1,000-point stake.

Winning and Scoring

• A winning hand must contain at least one Yaku (valid scoring combination).
• Win by Tsumo (self-draw) or Ron (discard from opponent).
• Scoring calculates Han and Fu to determine payments. Head bump applies (closest in turn order wins on double ron).