One more clever variation of Sudoku
on a "standard" 9x9 grid with a twist. There are three
color islands in the 9x9 grid. Within each island no two
immediate adjacent cells (horizontally, vertically, or
diagonally) that are part of this island must contain
the same numbers. Also, each of two 3x3 square areas
within each island must contain all the nine different
numbers 1 through 9.
The remaining rules are as in a "standard" Sudoku, and
the object of the puzzle is to fill in the whole 9x9
grid with numbers 1 through 9 (one number per cell) so
that each horizontal line, each vertical line, and each
of the nine 3x3 squares (outlined with the bold lines)
must contain all the nine different numbers 1 through 9.
To solve the puzzle you may want to print just the above
grid. For this click the image of the grid to go to a
new window with this grid; then you can print it out.
Note that you can print the puzzle for your own use
only, and not for any kind of commercial profit.