Fortune & Flame

Castling: once per game, move your Captain 2 squares toward a Fort, and that Fort hops to the Captain's other side. Allowed only if neither piece has moved, the squares between are empty, and the Captain isn't in check, passing through check, or landing in check.
Promotion: a Deckhand or Skeleton that reaches the far edge becomes a Galleon, Fort, Kraken or Sloop (your choice; almost always a Galleon).
En passant: if an enemy Deckhand or Skeleton moves 2 squares and lands right beside yours, you may capture it as if it had moved only 1. You must do it immediately or lose the chance.

Pirate name

or board a friend's ship

Room code

play here

Challenge the computer

Difficulty

Your side

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Your opponent opens this page, enters the code and presses Board ship. Anyone else who joins can watch.