X Placing Game

There are N x N grids (cells) in this game.
You can choose the board size or mode from options menu.
Board can be of 5x5,6x6,7x7,8x8 or 9x9 size.
*** Your task is to place the N (N can be 5, 6, 7, 8 or 9 depending on board size) crosses (X) on the white squares in such a way so that each row and each column contains exactly one cross (X).
*** You can put cross (X) by touching on a valid white square.
Each time you play the game, you face new challenge as there are virtually infinite number of board configurations (randomly generated board).
In 'Normal Mode' each row or column contains maximum of 3 white squares.
In 'Complex Mode' each row or column can contain more than 4 white squares.
Undo button restores the previous move.
Clear button clears the game board.
There are 2 modes (Normal and Complex) of the game.
By default game is started in normal mode.
If you switch from one mode to other, game is restarted.
This app is helpful to sharpen your imaginative and visualization skills.
This app is completely *FREE*, *NO ADD* and no *IN-APP PURCHASES*.
In some devices images may be skewed/distorted.
If there is any bug related to logic or display, please feel free to email me to fix the bug.