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Color Islands Sudoku*

Number Puzzles

by Henry Kwok**

Printable Puzzle
 
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.
 
*) Puzzle concept: Copyright 2007 Henry Kwok. All Rights Reserved.
**) Henry Kwok is the author of this original Sudoku variant. Its name and appearance are the original creations first published here, at my website, AgeOfPuzzles.com.
 
Last Updated: October 14, 2008
Posted: December 29, 2007
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