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Jyutping zeng2 zi6 gwo3 saam1 gwaan1
Pinyin jǐng zì guò sān guān

Definitions (Wiktionary)
  1. noun, Hong-Kong
    tic-tac-toe
    (syn.) 井字游戏, 过三关, 過三關, 井字棋, 井字遊戲
Definitions (Kaifangcidian)
  1. 井字棋
  2. 井字遊戲 – 井字游戏
  3. 圈圈叉叉