small changes in Player and SquareColor
removed unused field
added constructor and field to PieceType enum
made constructor private
made constructor private
Some GUI improvements
added CTRL + S shortcut for save menu item
changed size of board
added jfilechooser event
added default constructor
addd file chooser event
trying to implement line & column numbers/letters
creating frame using invokeLater
injected Game instance dependency
changed PlayersPanel constructor to include players' names
removed redundant field
started working on update method
added board field
added EMPTY piece type
added PieceType field