Gridzzly is a beautifully simple tool for anyone who uses grid, graph, or ruled paper. The webapp lets you ... the slider to adjust the spacing, and print away. The ruler at the top (which I ...

To play, print out a 10x10 grid paper. The numbers 0-9 are then assigned to the rows and columns (usually in random order), giving each of the 100 boxes in the grid an assigned number in both the ...