Learn Corridor

Everything you need to play a full game, in the order you'll need it.

The goal

Two players start on opposite sides of a 9x9 board. You win by reaching any square on the far row.
Each player has 10 walls. A wall blocks two squares wide and never disappears once placed.

Moving your pawn

On your turn you either move one square orthogonally or place a wall, never both.
You may not move through a wall, and you may not move diagonally unless a jump forces it.

Jumping

If your opponent stands on an adjacent square, you jump straight over them and land behind.
If a wall or the board edge sits directly behind them, you instead step diagonally around them.

Placing walls

Walls sit in the grooves between squares and span exactly two squares.
Walls may not overlap or cross another wall.
A wall is illegal if it leaves either player with no path at all to their goal row, blocking is allowed, sealing is not.

Strategy in three lines

Count shortest paths. A wall is worth playing when it costs your opponent more steps than it costs you.
Walls are a currency: running out means your opponent can shape the rest of the board alone.
In a pure race with no walls left, whoever is on move with the shorter path wins, check the count before you spend.

Ready for more? Read the Corridor strategy guide for openings, wall tempo and endgame races.