These extra squares are called citadels and are occupied by Guards at the start of the game. The game is won by either checkmating the enemy king, or by occupying one of the enemy citadels. No piece can make a capturing move while entering or leaving a citadel square. All pieces, even the King, are promoted upon reaching the last rank. Promoted pieces gain the ability to move and capture like an orthodox King.
All pieces can make a special non-capturing move on their first move.
A Pawn moves and captures like an orthodox Pawn, except that it promotes differently. If a Pawn reaches the far rank it promotes. Once promoted, a Pawn is able to move like an orthodox King. A promoted Pawn loses the ability to capture En Passant, however. A Knight moves the same as an orthodox Knight, except that it promotes differently and has a special first move.