Energy board is special feature of DoubleChessBoard.
You can see activity of pieces in colors.
Very useful for chess.
And especially for bughouse double chess !
Energy board allows You to better understand how masters in this chess variant looks on board.
You can switch on/off energy board when replaying saved games in PGN, BPGN format and also when You playing or analyzing games in DoubleChessBoard. As You can see its blue vs red enegy, white are neutral squares. Colors You can edit of course. Simply open file sysEnergy.bmp in Your favorite picture editor and replace colours as You wish.