- Goal. Be the first to place five of your stones in a row.
- Board. 15×15 intersections. Black moves first.
- Move. Place one stone on any empty intersection. You cannot move existing stones.
- Win. Five (or more) consecutive same-color stones horizontally, vertically, or diagonally.
- Strategy. Watch for "open threes" — three stones in a row with both ends open. They force your opponent to block.