Gomoku

Five in a Row on a 15×15 board. Pass-and-play, a scored Duel season, or a built-in AI — with undo and synthesized sound effects. Runs entirely in your browser — nothing is uploaded.

Duel mode: a win scores +5, a draw +2 each; the loser plays Black (first) next game, so whoever falls behind gets the initiative back and the score stays tight. First to the target score takes the season. Tap a name to rename, tap the bottom-right chip to change the target — records live in your own browser.