WORLD OF SUDOKU PRESENTS CHALLENGING SUDOKU: VOL # 1

 

  Hello all. My new book WORLD OF SUDOKU PRESENTS CHALLENGING SUDOKU: VOL # 1 is now available on Amazon in paperback format and on Payhip in PDF format.

  This book contains 150 handcrafted classic sudokus. The sudokus are hard and challenging, yet they can all be solved without the use of any advanced strategies or guess work. All you need is the knowledge of basic sudoku techniques and a bit of perseverance when you are stuck in a puzzle and you should be able to crack the puzzle.

  All the sudokus are provided with online solving links to Penpa as well as Sudokupad so that the solvers can also solve the puzzles on their gadgets.

  All the sudokus are test solved by Édouard Lebeau and his solving times are mentioned with each puzzle.

  I hope the book will be fun to solve. It also serves as an ideal practice material for sudoku championships as the difficulty level is similar to the ones that appear in various sudoku championships.

 Link to Amazon       https://www.amazon.com/dp/B0GYRD8DLW 

 Link to Payhip         https://payhip.com/b/n1JIf

Puzzle No. 496: Classic Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

Online Solving Link to Penpa

Online Solving Link to Sudokupad

Puzzle No. 495: Classic Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

Online Solving Link to Penpa

Online Solving Link to Sudokupad

Puzzle No. 494: Classic Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

Online Solving Link to Penpa

Online Solving Link to Sudokupad

Puzzle No. 493: Classic Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

Online Solving Link to Penpa  

Online Solving Link to Sudokupad

Puzzle No. 492: Odd-German Whispers Hybrid Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

Cells containing green circles contain only odd digits.

Adjacent digits along each green line have a difference of at least 5.

Online Solving Link to Penpa

Online Solving Link to Sudokupad

Puzzle No. 491: Thermo Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

There are some thermometer shapes in the grid. The digits are strictly in increasing order from the bulb to the flat end of each thermometer.

Online Solving Link to Penpa 

Online Solving Link to Sudokupad

Puzzle No. 490: Killer Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

There are some cages in the grid. The number on the top left corner of each cage is equal to the sum of the digits in that cage. Digits do not repeat in a cage.

Online Solving Link to Penpa 

Online Solving Link to Sudokupad

Puzzle No. 489: German Whispers - X Sums Hybrid Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

Adjacent digits along each green line have a difference of at least 5.

The clues outside the grid indicate the sum of the first X digits placed in the corresponding direction, where X is equal to the first digit placed in that direction. 

Online Solving Link to Penpa

Online Solving Link to Sudokupad

Puzzle No. 488: Thermo - X Sums Hybrid Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

There are some thermometer shapes in the grid. The digits are strictly in increasing order from the bulb to the flat end of each thermometer.

The clues outside the grid indicate the sum of the first X digits placed in the corresponding direction, where X is equal to the first digit placed in that direction. 

Online Solving Link to Penpa 

Online Solving Link to Sudokupad