Rules of the crown
Standard chess movement, check, castling, en passant and promotion apply. A checkmated king is removed. Its owner spends that turn crowning a surviving non-pawn on a square that is safe after the old king disappears.
The heir retains its movement and becomes the royal piece. Promoted pawns qualify. Resurrection can repeat. No safe heir means defeat. A resurrected royal cannot castle.
Stalemate, threefold repetition and 50 moves without a pawn move or capture draw the game automatically. Insufficient material is conservatively limited to two remaining original kings: ordinary chess material rules do not directly fit this variant.
Public access. Share your room link to play on separate devices.