[WingedPanther]

I'm a little rusty on Java, so my example will be in C++.

class piece
{
  public:
    bool moveTo(x,y);
    bool isThreatend();
    TYPE pieceType();
  private:
    COLOR color;
}

class pawn : piece
{
  private:
    bool EnPassante;
}

pawn myPawn;
piece myPiece;

myPiece has one data values: myPiece.color
myPawn has two data value: myPawn.color (inherited from the piece class) and myPawn.EnPassante
COLOR is an enumeration for the colors of chess pieces (Black and White).

Now I can make another class:

class Board
{
  public:
    void PlayGame();
  private:
    piece pieces[16][2];
}

This class has 32 pieces as data, each having a color and the ability to move.

Now, with a few more classes and some code for the methods, you have a chess program