How to play Chess (for Lunch with the Librarian)

Check out this site for rules and strategies.

And this:

The Game Of Chess

Every game of chess has its own story. Some are long-drawn out strategic affairs; others can be quick, but complicated, tactical battles. The winner is the player who can out-think his or her opponent, and make the best plans for attack and defence.
Chess is one of the oldest games in the world. Though no-one knows for sure, it was probably invented in India more than a thousand years ago . If you have a chess set, or decide to make your own, here are the rules you need to play the game.
What you need:
A chess board and pieces
Aim of the game:
The aim of the game is to use your army to capture the enemy king.
The armies:
There is a White army and a Black army. Both armies have the same pieces. These are:

Name	Picture	Symbol	Description	How it moves
1 King			The King is the most important piece in the army. If he is captured, the game is lost.	1 square in any direction (forward, back, across or diagonally)
1 Queen			The Queen is the most powerful piece.	Any number of squares in any direction
2 Castles			Castles are strong pieces which are good both at attacking the enemy and defending the King. Sometimes the Castle is called a ‘Rook’.	Any number of squares forward, back or across (but not diagonally)
2 Bishops			Bishops are good at attacking late on in the game. Because they move diagonally, they always stay on the same colour square that they started on.	Any number of square diagonally
2 Knights			Knights are at their best when there are lots of pieces on the board, and they can use their ability to jump over other pieces.	‘L shaped’ – two squares forward (or back) and one square across; or two squares across and one square forward (or back). The Knight can jump over other pieces while doing this.
8 Pawns			Pawns are the foot soldiers in the army. They gradually advance on the opposing army, but also need to defend the King.	Usually one square forward. If it is capturing an opposing piece, however, it moves one square forward diagonally. Each pawn may move two squares forward the first time it moves. If it does, it cannot capture in the same move. Pawns can never move backwards.

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