Do you have what it takes to be a Su Doku Grand Master?

Su Doku, "the crosswords without words," come with a warning: it is seriously addictive. You don't need to be a mathematical genius to solve these puzzles; it is simply a question of logic and a little patience. Here is a collection of 100 new puzzles arranged according to difficulty, starting with the easiest and ending with the fiendishly difficult.

200 New Puzzles -- From Fiendish to Super Fiendish

Su Doku, "the crossword without words," comes with a warning: it is seriously addictive. You don't need to be a mathematical genius to solve these puzzles; it is simply a question of logic and a little patience.

200 New Difficult Puzzles -- They Are Not Going to Be Easy But You Are Ready

Su Doku, "the crossword without words," comes with a warning: it is seriously addictive. You don't need to be a mathematical genius to solve these puzzles; it is simply a question of logic and a little patience.

200 New Puzzles -- From Easy to Just About Difficult

Su Doku, "the crossword without words," comes with a warning: it is seriously addictive. You don't need to be a mathematical genius to solve these puzzles; it is simply a question of logic and a little patience.

These 100 new puzzles—from easy to fiendishly difficult—come with a warning: They are seriously addictive.

You don't need to be a mathematical genius to solve these puzzles; it is simply a question of logic and a little patience.

Beware of pale imitations. These are the original and official Su Doku puzzles by Wayne Gould—New York Post's Su Doku puzzle master and one of Time magazine's Most Influential People.

These 100 new puzzles—from easy to fiendishly difficult—come with a warning: They are seriously addictive. You don't need to be a mathematical genius to solve these puzzles; it is simply a question of logic and a little patience.

Beware of pale imitations. These are the original and official Su Doku puzzles by Wayne Gould—New York Post's Su Doku puzzle master and one of Time magazine's Most Influential People.

These 100 new puzzles—from easy to fiendishly difficult—come with a warning: They are seriously addictive.

You don't need to be a mathematical genius to solve these puzzles; it is simply a question of logic and a little patience.

Beware of pale imitations. These are the original and official Su Doku puzzles by Wayne Gould—New York Post's Su Doku puzzle master and one of Time magazine's Most Influential People.

These 100 new puzzles—from easy to fiendishly difficult—come with a warning: They are seriously addictive. You don't need to be a mathematical genius to solve these puzzles; it is simply a question of logic and a little patience.

Beware of pale imitations. These are the original and official Su Doku puzzles by Wayne Gould—New York Post's Su Doku puzzle master and one of Time magazine's Most Influential People.

These 100 new puzzles—from easy to fiendishly difficult—come with a warning: They are seriously addictive.

You don't need to be a mathematical genius to solve these puzzles; it is simply a question of logic and a little patience.

Beware of pale imitations. These are the original and official Su Doku puzzles by Wayne Gould—New York Post's Su Doku puzzle master and one of Time magazine's Most Influential People.

Su Doku makes every day just a little more fun. You don't need to be a mathematical genius to solve these puzzles; it is simply a question of logic and a little patience.