For anyone who loves the challenge of Su Doku but manages to solve them within minutes, you can now enjoy the extended mental workout and ultimate endurance test

With its larger and more complex grid, Samurai is Su Doku multiplied. With a five grid interlinked system, every column, row, and 3x3 box must contain the digits 1 to 9. Where the puzzles overlap, the rows and columns do not go beyond their usual 9x9 length, but the interlocking boxes give you more clues--and more complexity. With another 100 new Samurai puzzles to vex you for hours, lose yourself in the four levels of...

The ninth volume of previously unpublished quality Su Doku puzzles from the puzzle providers to the "Times"
The 200 puzzles in this collection of treacherously difficult puzzles will stretch even the most advanced Su Doku enthusiast. You will need to use all of your best solving techniques to get to the end of this testing challenge. The puzzles in the collection are of the highest quality and are perfect for the advanced solver in need of a constant supply of ultra-difficult puzzles. They're guaranteed to provide hours of mind-stretching entertainment.

This supremely challenging cryptic collection contains 50 jumbo-sized puzzles, conceived to really challenge your word skills.

Give your memory a workout and hone your general knowledge with 80 definition-only puzzles from The Times T2 section.

Give your memory a workout and hone your general knowledge with 80 definition-only puzzles from The Times T2 section.

A super-sized challenge for crossword lovers, selected by the times2 Crossword Editor John Grimshaw.

200 brand new compelling and addictive word and number puzzles from The Times. Appearing daily in the newspaper, Codeword is the cracking alternative to Su Doku and Crosswords.

These are previously unpublished quality Su Doku grids from the puzzle providers to The Times, and help to develop you to take on Extreme Su Doku.

Give your word skills a serious workout, stimulate your brain cells and test your all-round general knowledge with 100 definition-style puzzles from The Sunday Times.