Board Games

Go (Weiqi/Baduk)

The ancient strategic board game of territory control. Play free online!

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What is Go? The Ancient Game of Strategy

Go, known as Weiqi in China, Baduk in Korea, and Igo in Japan, stands as one of the oldest and most profound board games in human history. Originating in China over 4,000 years ago, this deceptively simple game of placing black and white stones on a grid has captivated minds across millennia and cultures. Today, Go remains one of the most strategically complex games ever created, with more possible board positions than atoms in the observable universe.

The essence of Go lies in its elegant simplicity: two players take turns placing stones on the intersections of a grid, aiming to surround more territory than their opponent. Despite having only a few basic rules, Go produces incredible depth and complexity. Professional players spend decades mastering its intricacies, and the game has been a subject of philosophical study in East Asian culture for centuries, representing concepts of balance, harmony, and strategic thinking.

Go gained worldwide attention in 2016 when Google DeepMind's AlphaGo defeated world champion Lee Sedol, marking a historic moment in artificial intelligence. This victory was significant because Go's complexity had long been considered beyond the reach of computer algorithms, unlike chess which had been solved by computers decades earlier. The game's vast decision tree and reliance on pattern recognition and intuition made it the ultimate test for AI.

Whether you're a complete beginner or an experienced player, our free online Go game offers the perfect platform to learn, practice, and enjoy this timeless classic. With multiple board sizes, AI opponents, and two-player mode, you can develop your skills at your own pace while discovering why Go has fascinated humanity for over four millennia.

How to Play Go

1
Choose Your Board Size
Select 9x9 for beginners (quick games, 10-15 minutes), 13x13 for intermediate play, or 19x19 for the full professional experience. Larger boards offer more strategic complexity and longer games.
2
Place Stones on Intersections
Black always plays first. Click on any empty intersection (where grid lines cross) to place your stone. Unlike chess or checkers, stones are placed on intersections, not inside squares. Once placed, stones never move.
3
Understand Liberties
Every stone has liberties - the empty intersections directly adjacent to it (horizontally and vertically, not diagonally). A stone in the center has 4 liberties, on the edge has 3, and in the corner has 2. Connected stones share their liberties as a group.
4
Capture Enemy Stones
Surround opponent stones completely, removing all their liberties. When a stone or group has zero liberties, it's captured and removed from the board. Captured stones count toward your final score.
5
Surround Territory
Build walls of stones to enclose empty intersections as your territory. Focus on corners first (easiest to secure), then sides, and finally the center. Efficient territory-building is the key to winning.
6
Pass When Finished
When you believe no beneficial moves remain, click "Pass" to skip your turn. When both players pass consecutively, the game ends. You can also click "Resign" if you wish to concede the game early.
7
Calculate Final Score
Score = Territory (empty intersections you control) + Captured stones. White receives 6.5 points (komi) to compensate for Black's first-move advantage. The player with the higher total wins.

Go Rules

Core Game Rules

1. Alternating Turns

Black always moves first. Players take turns placing one stone on any empty intersection. You may also choose to pass your turn instead of placing a stone. Passing is strategic, often signaling the end of the game.

2. Liberties and Groups

Liberties are empty intersections directly adjacent (horizontally or vertically) to a stone. Stones of the same color that are adjacent form a group and share all their liberties. A group survives as long as it has at least one liberty.

3. Capturing Stones

When you place a stone that removes the last liberty of an opponent's stone or group, those stones are captured and removed from the board immediately. Captured stones are kept and added to your score at the end of the game.

4. The Ko Rule

You cannot make a move that would recreate the exact previous board position. This prevents infinite loops where players capture and recapture the same stone. You must play elsewhere first (a "ko threat") before recapturing.

5. No Suicide Rule

You cannot place a stone where it would have no liberties immediately, unless that move captures opponent stones first. Self-capture (suicide) is forbidden in most rulesets. The exception is if your move captures enemy stones, giving your stone liberties.

6. Game End

The game ends when both players pass consecutively, signaling that neither sees any beneficial moves remaining. Players may also resign at any time. After the game ends, territory is counted and the winner is determined.

Scoring Rules

Territory Scoring

Count each empty intersection that is completely surrounded by your stones as one point of territory. An area is your territory only if it's bordered exclusively by your color - mixed borders mean the territory is neutral.

Capture Points

Each stone you captured during the game adds one point to your score. Captures include both stones removed during play and any "dead" stones (groups that cannot avoid capture) identified at game end.

Komi (Compensation Points)

White receives 6.5 points (komi) to compensate for Black's advantage of moving first. The half-point ensures there are no ties. Tournament komi varies slightly by ruleset (Chinese: 7.5, Japanese: 6.5).

Final Score Calculation

Final Score = Territory Points + Captured Stones + Komi (White only). Compare both players' final scores. The player with the higher score wins. Winning margins can range from 0.5 points to 50+ points in lopsided games.

Dead Stones

At game end, players agree on which stones are "dead" (cannot escape capture). Dead stones are removed and counted as captures. If players disagree, the game continues until the status is resolved through play.

Tips and Strategies

Corner-Side-Center Priority

Secure corners first - they require the fewest stones to enclose territory. Then extend along the sides, and finally contest the center. This fundamental principle maximizes efficiency in territory building.

Make Two Eyes

A group with two separate internal liberties ("eyes") can never be captured - the opponent cannot fill both eyes simultaneously. Creating two eyes ensures your groups' permanent survival on the board.

Play on Star Points

Star points (marked dots on the board) are strategically valuable positions. Opening moves on star points establish influence over large areas. The 4-4 point (hoshi) and 3-4 point (komoku) are classic opening moves.

Keep Your Groups Connected

Connected stones share liberties and are stronger together. Avoid creating isolated, weak groups that can be attacked. When possible, extend from existing groups rather than starting new isolated ones.

Attack Weak Groups

Identify opponent groups without two eyes and apply pressure. Even if you don't capture them, attacking weak groups builds your territory and influence while your opponent defends. This is called "leaning attack."

Don't Follow Your Opponent

Avoid playing too close to your opponent's moves. Take the initiative ("sente") by making moves your opponent must respond to. Maintaining sente gives you control over the game's direction.

Learn Basic Joseki

Joseki are established sequences of moves in corner situations that give equal results to both players. Learning a few basic joseki helps you navigate the opening confidently. Start with 3-3 invasion and basic star point joseki.

Count and Compare

Periodically estimate both players' territory to understand who's ahead. If you're winning, play conservatively to protect your lead. If behind, look for aggressive moves to change the balance. Counting is a crucial professional skill.

Benefits of Playing Go

Enhances Strategic Thinking

Go develops long-term planning skills and the ability to think several moves ahead. Players learn to balance immediate gains against future benefits, a skill transferable to business and life decisions.

Improves Concentration

A single Go game can last hours, requiring sustained focus and attention. Regular play strengthens concentration abilities and the capacity to maintain deep focus for extended periods.

Develops Pattern Recognition

Go players develop exceptional pattern recognition abilities. Recognizing shapes, formations, and tactical patterns becomes intuitive with practice, enhancing visual processing and memory skills.

Teaches Patience

Go rewards patient, methodical play over hasty aggression. Players learn that small, consistent advantages compound over time, teaching valuable lessons about delayed gratification and persistence.

Connects Cultures

Go is played worldwide, connecting people across cultures and generations. The game provides a common language for strategy enthusiasts from China, Japan, Korea, Europe, and the Americas to compete and learn together.

Supports Cognitive Health

Studies suggest that playing strategic board games like Go helps maintain cognitive function as we age. The mental exercise of calculating variations and remembering patterns keeps the brain sharp and engaged.

Go is an ancient strategic board game invented in China over 3,000 years ago. It is called Weiqi (meaning 'encirclement board game') in Chinese, Baduk in Korean, and Igo in Japanese. The English name 'Go' comes from the Japanese word 'igo'. It is also poetically known as 'Ranka' in Japanese, meaning 'rotten axe handle', from a legend about a woodcutter who watched two mountain sages play for so long that his axe handle rotted away.

Go is played on a grid (typically 9x9 for beginners, 13x13, or 19x19 for advanced players). Two players take turns placing black and white stones on the intersections of the grid lines, not inside the squares. Black always plays first. The objective is to surround more territory (empty intersections) than your opponent. Stones or groups with no liberties (adjacent empty points) are captured and removed. The game ends when both players pass consecutively.

Liberties are the empty intersections directly adjacent (horizontally or vertically, not diagonally) to a stone or connected group of stones. A single stone in the center of the board has 4 liberties. When a stone or group has zero liberties remaining (is completely surrounded by opponent stones), it is captured and removed from the board. Understanding liberties is fundamental to Go strategy.

From a mathematical and computational perspective, Go is more complex than chess. A 19x19 Go board has approximately 2.08 x 10^170 possible legal positions, compared to about 10^50 for chess. The branching factor (possible moves per turn) in Go is over 200, versus about 30 in chess. This explains why AI beat the chess world champion in 1996 (Deep Blue vs Kasparov) but only beat the Go world champion in 2016 (AlphaGo vs Lee Sedol). However, both games offer unlimited depth for human players.

Komi is a compensation score given to the white player for going second. In modern tournament play, komi is typically 6.5 or 7.5 points. This half-point ensures there are no draws (ties). Since black has the advantage of playing first, komi balances the game. Without komi, black would have a significant advantage, especially at higher levels of play.

The Ko rule prevents infinite repetition of the same board position. When a single stone is captured and the capturing player could immediately recapture it (creating the exact previous board position), the Ko rule prohibits this immediate recapture. The player must play elsewhere first (a 'Ko threat') before recapturing. This leads to strategic Ko fights where players compete for valuable Ko threats.

Beginners should start with a 9x9 board. Games on smaller boards are quicker (10-15 minutes) and help you learn basic concepts like capturing, liberties, and territory without being overwhelmed. Once comfortable, progress to 13x13 for intermediate play, then to the standard 19x19 board used in professional tournaments. Each size offers a different strategic experience.

In Go, the best opening strategy is to secure corners first since they require fewer stones to enclose territory. From corners, extend along the sides (edges), then push toward the center. Common opening moves are played on the 3-4 point (san-san), 4-4 point (hoshi/star point), or 3-3 point. Star points are marked on the board for reference. This corner-side-center progression maximizes efficiency.

Go uses two main scoring methods: Area scoring (Chinese rules) and Territory scoring (Japanese rules). In both, you count the empty intersections you have surrounded (territory). With territory scoring, add captured stones (prisoners) to your score. With area scoring, add your stones on the board. White receives komi (typically 6.5 points) to compensate for going second. The player with the higher total wins.

Major professional Go associations include: China (Chinese Weiqi Association), Japan (Nihon Ki-in, Kansai Ki-in), South Korea (Korea Baduk Association), Taiwan (Taiwan Chi Yuan Culture Foundation), and professional systems in the US (AGA) and Europe. Top professionals earn over $1 million annually. Online resources include GoMagic.org for tutorials, Tsumego Hero for puzzles, r/baduk on Reddit, and the British Go Association website for rules and guides.

Why Play Go on YaliKit?

No Downloads Required

Play instantly in your browser without installing any software. Our Go game loads in seconds and works on any modern device.

No Account Needed

Start playing immediately without registration or login. Your game statistics are saved locally in your browser for convenience.

Play on Any Device

Fully responsive design works perfectly on desktop, tablet, or mobile. The board automatically adjusts to your screen size.

Multiple Board Sizes

Choose from 9x9 (beginner), 13x13 (intermediate), or 19x19 (professional) boards. Perfect for players at any skill level.

AI or Two-Player Mode

Practice against our built-in AI opponent or challenge a friend in local two-player mode. Both options available for every board size.

Fullscreen Mode

Enter fullscreen mode for an immersive playing experience. Perfect for focused play sessions without distractions.