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Extra Challenging SuDoku Puzzles Index

These are print-friendly versions with four SuDoku puzzles to a page. The pages will open in a new browser window. After printing, close the window to return to this page. Tip: Use a pencil lightly and have an eraser handy. Difficulty is not only determined by how many numbers are given but also by which numbers and their placement in the grid. Start by checking for the most frequent number and work row by row and column by column around the grid. Would you like to take a tutorial? How To Solve SuDoku Puzzles. Happy puzzling!

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