Omok

Black moves first. Click a crossing to place a stone; on a keyboard, tab to the board, arrow keys to move, Enter or Space to play. Five in a row — any direction — wins. Vs Computer plays a solid heuristic opponent that takes an open win and blocks an open loss on sight, though — unlike Tic-Tac-Toe's — it is not unbeatable; switch to Two players to share this screen with a friend instead. Your game and running score are saved in this browser.