Hex

Danish mathematician Piet Hein invented Hex in 1942 at the Niels Bohr Institute, and John Nash independently rediscovered it at Princeton in 1948. Two players place stones on a rhombus-shaped board of hexagonal cells, each trying to connect their two opposite sides before the opponent connects the other pair. The game cannot end in a draw, a fact Nash proved using topology. Hex trains planning, pattern recognition, and threat evaluation. Place your first stone and build a chain across the board.

1. Open the Hex board, a rhombus of hexagonal cells. One player owns the top and bottom edges, the other owns the left and right edges.
2. The first player places a stone on any empty cell. Turns alternate, and each move places exactly one stone.
3. Stones never move or get captured once placed. The board fills up as the game progresses.
4. Build a connected chain of your stones from one of your edges to the opposite edge. Cells connect through shared sides, not corners.
5. Block your opponent's chain while extending your own. Every move does double duty on offense and defense.
6. Complete an unbroken path between your two sides to win. The game always has a winner and never ends in a draw.

• Players alternate placing one stone on any empty cell. The first player typically uses red and owns the top and bottom edges.
• A stone, once placed, stays on that cell for the rest of the game. No captures and no movement.
• Cells connect through shared sides only. Diagonal corner contact does not count as connected.
• The first player to form an unbroken chain of their stones between their two opposite edges wins immediately.
• Draws are impossible. The board topology guarantees that when one side is blocked, the other must be connected.
• Many tournaments use the swap rule, which lets the second player steal the first move to balance first-player advantage.

• Claim central cells early. The center supports connections in all six directions, giving you more route options than an edge cell.
• Learn the bridge pattern: two stones with two empty cells between them form an unbreakable connection, because you can always complete the link on the next move regardless of the opponent's response.
• Create two simultaneous connection threats. The opponent can block only one per turn, so a double threat usually wins.
• Think in regions, not single cells. Control a zone of the board and your opponent must work around it, even if no single stone looks threatening.
• Do not overreact to every block. If your move creates a stronger threat elsewhere, let the opponent block the weaker one and take the initiative.
• On small boards like 7x7, the first player has a proven winning strategy. Use the swap rule in casual play to keep games balanced.

• 11x11 Hex: The standard tournament size, large enough for deep strategy but small enough to keep games under 30 minutes. Most published analysis covers this board.
• 7x7 Hex: A compact format where the first player has a proven winning strategy. Ideal for learning bridge patterns and basic tactics before moving to larger boards.
• Connect Four: Connect Four shares the connection-game DNA with Hex but adds gravity, dropping pieces into columns instead of placing them freely on the board.

• The no-draw guarantee means every game has a decisive winner.
• Bridge patterns and double threats reward study and pattern recognition.
• The rules take one minute to learn, but the strategy depth rivals Go on smaller boards.
• Every move works on offense and defense simultaneously, creating tense decisions.
• The swap rule keeps games fair and adds a psychological layer to the opening.

Play Hex online for free on Clasica Games. Place stones by clicking empty cells, watch connections highlight in real time, and challenge the computer at multiple difficulty levels. The interface traces potential paths so you can spot threats instantly. No download or account needed. Open a board and place your first stone.

Hex distills connection strategy into a clean, draw-free contest. Claim the center, build bridges, create double threats, and link your sides before the opponent links theirs. Open a free board and place your first stone.

• Hex history - Britannica
• Hex mathematics and strategy