What is Diagonal in chess?
A line of squares running corner-to-corner at 45 degrees.
Bishops travel exclusively along diagonals and can never change the color of square they control. The two longest diagonals (a1-h8 and a8-h1) are called the long diagonals.
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- Long diagonalThe two eight-square diagonals that run from corner to corner (a1-h8 and a8-h1).
- CentreThe four central squares d4, d5, e4, and e5 - the most important real estate on the board.
- FlankThe queenside (a through d files) or kingside (e through h files) wings of the board.
- Square colourEach bishop is permanently locked to either light squares or dark squares for the whole game.
- BlunderA move that throws away material or the game, usually for nothing.
- ForkOne piece attacking two or more enemy pieces at the same time.