The GameBoard class

Now that we have a way to represent pieces in memory, the next logical step is to create a way to represent an entire board of playing pieces.

The game board is a two-dimensional array of GamePiece objects, and we can build in some additional functionality to allow our code to interact with pieces on the game board by their X and Y coordinates.

The GameBoard class needs to:

• Store a GamePiece object for each square on the game board

• Provide methods for code using the GameBoard to update individual pieces, by passing calls through to the underlying GamePiece instances

• Randomly assign a piece type to a GamePiece

• Set and clear the "Filled with water" flags on individual GamePieces

• Determine which pipes should be filled with water, based on their position and orientation, and mark them as filled

• Return lists of potentially scoring water chains to code using the GameBoard