\begin{definition}[Definition:Chess]
{{improve|Most of the below has been extracted into subpages. I have not had time to rewrite it yet.}}
'''Chess''' is a game for two players.
It is played using '''pieces''' placed on a '''chessboard''', where the players take turns to move a piece.
A piece is '''captured''' if an opposing piece moves onto the same space.
The opposing piece is '''attacking'''.
The captured piece is then removed from the board, unless it is a king.
It is forbidden to capture your own piece.
A piece is '''threatened''' {{iff}} it could be captured in one move by any piece.
A piece cannot move over another piece, unless it is a knight, or it is castling.
If a king is captured, the player who captured it wins immediately.
A king is put in '''check''' {{iff}} it is threatened by any piece.
This is '''checkmate''' {{iff}} the player who owns the king cannot prevent the king from being captured using one move.
The only other way to win is if a player indicates that he resigns, traditionally by knocking over his own king.
\end{definition}