Gomoku: Freestyle Rules and Your First Threats

Gomoku has a direct objective: connect five of your own stones horizontally, vertically or diagonally before your opponent does. BluffKing uses a 15×15 board and freestyle rules, with no chips. It is a useful starting point if you want a short rules introduction and decisions that deepen as you practise.

Moves and game endings

Black moves first. Players alternate placing a stone on an empty intersection; placed stones do not move. Five or more in a line wins, so an overline of six also counts. Black has no double-three or double-four restrictions. A full board without a winning line is a draw. Players swap colours between games in the same room.

If you know restricted Renju rules, adjust your expectations before starting. A black move creating two threats is not automatically a foul in this variant.

Understand an open four

Label seven intersections on a horizontal line A through G. Suppose black occupies C, D, E and F in a continuous line, while B and G are empty, with no other immediate game-ending condition. Black can win next move by playing either B or G. If white blocks only one end, the other still completes five.

The lesson is to notice open space around a line of three before it becomes a four with two open ends. It is not an instruction to block every three blindly: first check whether you already have an immediate winning move yourself.

Ask three questions before placing a stone

1. Can I win now? Check all four line directions around your stones for a move that immediately completes five.
2. Can my opponent win next? Look for fours and gaps that demand a response, including threats away from the corner you are attacking.
3. If neither side can win immediately, what creates useful follow-ups? Compare moves that connect your stones while preserving space in several directions.

Beginners often check horizontal lines but miss diagonals. Another common problem is making a dense cluster while blocking the ends of their own attack. After a game, find the first immediate threat you missed. That gives you a more manageable practice target than analysing every move at once.

Practise against the computer

BluffKing offers three computer strengths. Start with an easier level and dedicate a game to checking the opponent’s immediate wins before each move. Bot rooms allow take-back so you can revisit a missed defence; do not assume you can undo moves against another person.

Each move has a 40-second clock. The system plays a move after a timeout, and an absence longer than 90 seconds forfeits the game. When reviewing what happened, distinguish your chosen moves from timeout moves.

How fairness works here

Both sides see the same complete board. The server checks turns, placements and winning lines; there is no shuffle or hidden hand. The game records results, move counts and ending reasons without chips. Membership grants no extra move. The fairness page explains how this differs from card-game dealing.

Practise and keep reading

Game features and rules · Open the game lobby · Full rules and scoring

Which of the seven games should you play? · What to check when choosing a platform