Rook (chess)
From Tardis Wiki, the free Doctor Who reference
The rook was a chess piece used when playing games of chess. Both players had two of them, either black or white.
In a game of chess against K9 Mark II, the Fourth Doctor moved one of his rooks to bishop's four. (TV: The Androids of Tara [+]Loading...["The Androids of Tara (TV story)"])
