It gives me great joy to tell you all that my new book World Of Sudoku: Vol # 10 has been released and is available on Amazon in Paperback format and on Payhip in PDF format. The book contains 120 Handcrafted Sudokus covering 10 Hybrid Sudoku Variants. All the puzzles in the book are test solved by Édouard Lebeau and his test solve timings are mentioned with each each puzzle. Online Solving Links of Penpa as well as Sudokupad are also provided with each sudoku. The Variants covered in the book are: X Sums-Consecutive Pairs Hybrid Sudoku; Clone-Sum Frame Hybrid Sudoku; Outside Palindro ..read more

  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.  Every digit on a grey line must have a value which lies between the values of the two digits in the circles at the ends of the line. Digits may repeat along a line. Online Solving Link using Penpa Online Solving Link using Sudokupad ..read more

  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. Adjacent digits along each green line have a difference of at least 5. Online Solving Link using Penpa Online Solving Link using Sudokupad ..read more

  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.  If a grey circle is given between two adjacent cells, then the digits in those cells will be consecutive. Not all grey circles are given, which means adjacent cells without a grey circle may or may not contain consecutive digits. Online Solving Link using Penpa Online Solving Link using Sudokupad ..read more

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.  Wherever 2 odd and 2 even digits form a 2x2 checkerboard pattern, a Battenburg marking is given. If there is no marking, the above pattern is not allowed. Online Solving Link using Penpa Online Solving Link using Sudokupad   ..read more

  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.  Endpoints (Diamonds) must differ by at least 4. Digits on the line must be different than the endpoint values and must not fall between them. Each Lockout segment is treated as an independent Lockout Line. Digits can repeat if allowed by other rules. Online Solving Link using Penpa Online Solving Link using Sudokupad ..read more

  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 using Penpa Online Solving Link using Sudokupad ..read more

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 arrow shapes in the grid. The sum of the digits along the path of each arrow must equal the digit in the circled cell. Digits may repeat along an arrow.  Online Solving Link using Penpa Online Solving Link using Sudokupad   ..read more

  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 using Penpa Online Solving Link using Sudokupad ..read more

  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 using Penpa Online Solving Link using Sudokupad ..read more