Chess Queen,Rook,Bishop & Knight Problem

ENJOY THE CHESS PUZZLES !!! This game consists of following three chess problems based on Queens, Knights, Rooks and Bishops : Qureen and Rook Mode : Your task is to place minimum number of Queens (preferably 4) and minimum number of Knights (preferably one) on a chessboard in such a way so that no one can attack other (non attacking mode) and all the 64 cells are either occupied or defended. Queen can't attack other Queen or Rook and Rook can't attack other Rook or Queen. Qureen and Bishop Mode : Your task is to place minimum number of Queens (preferably 4) and minimum number of Bishops (preferably one) on a chessboard in such a way so that no one can attack other (non attacking mode) and all the 64 cells are either occupied or defended. Queen can't attack other Queen or Bishop and Bishop can't attack other Bishop or Queen. Qureen and Knight Mode : Your task is to place minimum number of Queens (preferably 4) and minimum number of Knights (preferably one) on a chessboard in such a way so that no one can attack other (non attacking mode) and all the 64 cells are either occupied or defended. Queen can't attack other Queen or Knight and Knight can't attack other Knight or Queen. You will win if you can achieve the configuration. Queens, Rooks, Bishops and Knights follow the standard chess rules. Hint button will show all the possible moves remaining. ***Green dots may not be shown for some cells which are mutually under attack. Green dots denote that the cell is already covered by a piece. Undo button reverts back the last move. Clear button clears the chessboard. *** Sometimes any message may not be given for the following board condition : There is no place for Queen but Rook, Bishop or Knight may be placed on the board. If you touch a already occupied cell it will show the cells covered by that piece by green dots. This game is ABSOLUTELY FREE, contains NO-ADS or IN-APP PURCHASES. Incase of any bug, please email me.