Test your powers of logic with these challenging Killer Su Doku puzzles from The Times. This is the latest volume in the hugely popular series, featuring puzzles that incorporate an extra element of arithmetic to push your skills to the limit.

These puzzles utilize the standard 9x9 grid but introduce a mathematical challenge: in addition to ensuring every row, column, and cube contains the numbers 1-9, you must also ensure that outlined cubes add up to the specified number. With no easy puzzles included, this collection is designed for those who enjoy living dangerously and pushing beyond their mental comfort zone.

• 200 new Killer Su Doku puzzles.
• Puzzles feature an added arithmetic challenge alongside standard Su Doku rules.
• Difficulty levels include Moderate, Tricky, Tough, and Deadly.
• Designed to test logic and arithmetic skills to the limit.
• Paperback format with four-color printing.

• Brand: Times Books
• Author/Contributor: The Times Mind Games
• Binding: Paperback
• Language: English
• Print Length: 288 pages
• Dimensions: 127 x 18 x 197mm (Approx. 5 x 0.7 x 7.75 inches)
• Weight: 200g
• ISBN-10: 0008673209
• ISBN-13: 978-0008673208
• Publication Date: May 22, 2025

Steel yourself for this terribly tough installment of The Times' most demanding logic challenges.