Killer Sudoku Variants: 5 different Variants of Sum Sudoku Puzzles for adults (easy to hard) (Paperback) (ISBN-13: 9798653108204)

Keep your mind young and your memory sharp with 450 Killer Sudoku Variety Puzzles Book.

There are 5 different types of puzzles in this book, Diagonal Killer Sudoku, Jigsaw Killer Sudoku, Killer Windoku, Girandola Killer Sudoku, Antidiagonal Killer Sudoku.

The book has 90 puzzles for each type from easy to hard, a total of 450 puzzles with solutions.

What is killer sudoku and how to solve?

• it starts with an empty grid and only given the sum of caged cells written in small font on the upper left corner of the cage.
• No number can be repeated in any row, column, region or cage.
• You have to work out the summation and find the numbers in the cage, region, row, and columns.
• Of course, you will use every tip and trick used for traditional sudoku and more.
• There are many tips to solve traditional sudoku especially elimination and exclusion and logic
• But for killer sudoku, the rule of 45 and unique sum are the most important clues to solve the puzzles.

• Diagonal Sudoku or Sudoku X has an extra rule where the numbers 1 to 9 must fit in the diagonal lines and no repetition of any number in the diagonals marked by the gray X lines.
• Jigsaw Sudoku the 3x3 blocks are no longer square, instead it's irregular region of 9 cells. As twisted as it sounds, these puzzles are challenging and addictive.
• Killer Windoku has extra four (3x3) blocks (shaded) where the numbers 1 to 9 can fit in without repetition.
• Girandola Killer Sudoku has an additional rule where the scatted shaded cells must contain the numbers 1 to 9 with no repetition in those shaded cells.
• In the Anti-diagonal variation, the diagonal lines should only have at most three different numbers. Repeated numbers are okay in the diagonal line, that is why it's called anti-diagonal.

Features

• Size: 8 x 11.5 inch (large size) with softcover and paperback binding.
• Pages: 110 pages with full-page 450 different puzzles. (6 puzzles per page so it's compact for easy carrying and holding).

Stretch your brain with this unique selection of fun and challenging Killer Sudoku Variety. Scroll up and order your copy.