Cosumi Go Online Game - Free Strategy Board Game

Cosumi brings the ancient board game of Go, also known as Igo, Baduk, and Weiqi, to your browser for free. You can choose board sizes from 5x5 to 19x19, making it suitable for both beginners and experienced players. The game focuses on placing stones of your color on empty intersections, capturing enemy stones by surrounding them, and ultimately controlling more area than your opponent. With simple rules but deep strategy, Cosumi offers endless fun for thinking gamers. Play directly without any downloads or sign-ups.

To play Cosumi, start by selecting your preferred board size, from 5x5 to 19x19. Each turn, click an empty intersection to place a stone of your color. You may pass your turn at any time. Capture occurs when all adjacent points of a stone or group are occupied by the enemy, removing those stones from the board. Remember, capture takes precedence over self-capture, and you cannot recreate a previous board position. The game ends after two consecutive passes, and the player with the larger surrounded area wins. Use your mouse to click and place stones, and enjoy full-screen mode for a better view.

Game Features:

Why You’ll Like It: Cosumi respects the original rules of Go while making it accessible online. The clean interface and adjustable board sizes allow you to practice or play casually without distractions.

Compatibility

💻 Desktop | 📱 Mobile | 📟 Tablet – All supported · Best with Chrome or Safari