Chess Queen,Rook,Knight and King Problem

ENJOY THE BEAUTY OF CHESS !!! This game is a chess problem based on Queens, Knights, Kings and Rooks. Your task is to place maximum number (atleast 2) of Queens, Knights, Kings and Rooks on a chessboard in such a way so that number of Queens, number of Kinights, number of Kings and number of Rooks are equal and none of these can attack each other i.e. Queens, Knights, Kings and Rooks will have to be placed in non attacking mode. You will win if you can achieve the configuration. Queens, Knights, Kings and Rooks follow the standard chess rules. Last moved piece (Queen, Knight, King or Rook) is represented by red boundary. Queen button is to place Queen on the board. Knight button is to place Knight on the board. King button is to place King on the board. Rook button is to place Rook on the board. By default Queen is selected at game startup. Hint button will show all the possible moves remaining. (It may not highlight the cells under mutual attack) Green dots denote that the cell is already covered by a piece (Queen, Knight, King, Rook or all). Playing instructions can be found from game options menu. Undo button reverts back the last move. Clear button clears the chess board. If you touch a already occupied cell it will show the cells covered by that piece by green dots. You can place atleast 3 Rooks, 3 Knights and 3 Kings on the board. You can place 2 Knights, 3 Queens and 3 Rooks on the board. *** You can continue the game by cancelling the dialog box if you think that you can achieve better configuration. This app is ABSOLUTELY FREE,has NO IN-APP PURCHASES and NO ADS. In case of any bug please email me.