The essential rules
The board has 15 × 15 intersections. Black moves first. Each player places a stone on an empty intersection; placed stones stay in position and are not captured.
Read the rulesA thinking game · In development
Five stones. A line to build.
Placing a stone seems simple. Finding the right balance between creating a threat and defending requires looking in every direction.
Understand before you play
Explore the possibilities
After each placement, check the row, column, and both diagonals. Defending one line can leave a threat on another.
Learn step by stepAn explained example
Complete the line
View the worked example