Chess Rule "8th Parallel King Wins"
How each piece moves
- Moving a pawn – pawns move straight forward one space at a time, but capture diagonally (within a one-square range). On its first move, a pawn may move two squares forward instead (with no capturing allowed in a two-square move). Also, pawns are subject to the en passant and promotion movement rules (see below).
- En passant – on the very next move after a player moves a pawn two squares forward from its starting position, an opposing pawn that is guarding the skipped square may capture the pawn (taking it "as it passes"), by moving to the passed square as if the pawn had stopped there.
- Pawn promotion – when a pawn reaches its eighth rank it is exchanged for the player's choice of a queen, rook, bishop or knight (usually a queen, since it is the most powerful piece).
- Moving a knight – knights move two squares horizontally and one square vertically, or two squares vertically and one square horizontally, jumping directly to the destination while ignoring intervening spaces.
- Moving a bishop – bishops move any distance in a straight line in either direction along squares connected diagonally. One bishop in each army moves diagonally on white squares only, and the other bishop is restricted to moving along black squares.
- Moving a rook – rook may move any distance along a rank or a file (forward, backward, left, or right), and can also be used for castling (see below).
- Castling – special move available to each player once in the game (with restrictions) where the king is moved two squares to the left or right and the rook on that side is moved to the other side of the king.
- Moving the queen – queen can move like a rook or like a bishop (horizontally, vertically, or diagonally), but no castling.
- Moving the king – king may move one square in any direction, but may not move into check. It may also make a special move called "castling" (see below). King Promotion into Emperor King Wining the Game by reaching the 8th Parallel or "Eighth Rank" as post napoleonic Marshall's call Note: Don't surrender that easily your rooks or queens due to pawn to queen promotion.