Play a complete game of Gomoku against AI without leaving ChatGPT or creating another account. Start instantly on the official 15×15 tournament board, choose Black or White, and match your skill with Easy, Normal, or Hard AI. You can also request a quick 13×13 game or a spacious 19×19 board. Pick Standard Gomoku, Freestyle Five in a Row, or professional Renju rules with Black’s overline, double-four, and double-three forbidden moves. Pro and Long Pro openings are available to reduce Black’s first-move advantage. The interactive board marks forbidden points, highlights the latest stone, displays move numbers, and warns when your opponent can win on the next turn. Two-tap move confirmation helps prevent mistakes on mobile, while undo and resign keep the game flexible. After the final move, the winning five and result appear immediately. Whether you call it Gomoku, Five in a Row, Renju, Omok, or Gobang, this is a fast, polished way to challenge an AI at your level.