Move-and-block isolation: rules and printable materials

Move your pawn along a clear line, block one empty square, and leave your opponent without a legal move.

Players

2

Plan for

10–20 minutes

Bring

A 5 by 5 board, A/B pawns and block marks

Set a fixed starter

Use columns A to E from left to right and rows 1 to 5 from bottom to top. A begins at C1 and B at C5; all other squares are empty. A takes the first turn. Before starting agree that blocked cells remain blocked for the whole game. Use crosses or spare paper to mark blocks so they cannot be confused with either pawn.

Move then block

On your turn move your own pawn at least one square horizontally, vertically or diagonally along a straight line. Every square crossed and the destination must be empty and unblocked. You may not jump the other pawn or a block. After moving, block exactly one empty unblocked square anywhere on the board, including the square you just left. Never block either occupied pawn square.

Finish the complete turn

A turn is not complete until both movement and blocking are recorded. From the initial board A may move C1 to B2 and then block C1. B may move C5 to D4 if the clear path remains. Blocking is a separate choice, not automatically the square vacated. Once a block has been agreed, do not move it to improve a later plan.

Check the losing condition

At the start of your turn, if your pawn has no legal destination, you lose immediately. There is no pass and no requirement to be surrounded on all eight adjacent cells by blocks alone: an adjacent opposing pawn or board boundary can also obstruct a direction. Because every direction begins with its adjacent square, testing those eight neighbors is sufficient to see whether any move exists.

Keep play accessible

Let a participant name coordinates while a helper moves and marks. Read the log aloud before the next turn if either player requests it. The game is deterministic and has no automated opponent; the printed practice sequence is an example of legal actions, not a guaranteed winning strategy. Swap first player for a second game. A three-by-three board with center-column starts is a shorter variant.

Printable materials

Preview at 100% scale, with browser headers and footers off. Cut with suitable help. Keep host keys separate. This is a manual tabletop kit, not an online opponent, automatic judge or solver.