Best hitori game app ever. now available in hd version. the game is played with a grid of squares or cells, and each cell contains a number. the objective is to eliminate numbers by filling in the squares such that remaining cells do not contain numbers that appear more than once in either a given row or column. filled-in cells cannot be horizontally or vertically adjacent, although they can be diagonally adjacent. the remaining un-filled cells must form a single component connected horizontally and vertically.