How to play

1. 1

   Hide your army

   Place your 21 pieces on your first three rows. Your opponent only sees blank tiles.

2. 2

   Move and challenge

   Move one square forward, back or sideways. Moving onto an enemy piece is a challenge: the arbiter removes the lower rank (both if equal) and reveals nothing else.

3. 3

   Take the flag

   Capture the enemy flag, or move your flag to the far row. If an enemy piece is next to it there, it must survive one more turn.