Rules & objective
A15×15 freestyle board. You play Black first; the computer plays White. Five or more in any horizontal, vertical or diagonal line wins. No forbidden moves. A full board without a winner is a draw.
Controls
Choose an empty intersection and place a stone; coordinate selectors and confirmation are also available.
Worked example
If four black stones form an open-ended line, placing at an open end completes five. Check White’s immediate threats before choosing another move.