PUZZLE NO. 21 : 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 box.

PUZZLE NO. 20 : THERMARROW SUDOKU

RULES : Classic sudoku rules apply. The grid is divided into two halves by a diagonal from R9C1 to R1C9 which contains numbers from 1 to 9. One side of the diagonal follows the rules of thermo sudoku. The other side of the diagonal follows the rules of arrow sudoku.

PUZZLE NO. 19 : THERMARROW SUDOKU

RULES : Classic sudoku rules apply. The grid is divided into two halves by a diagonal from R9c1 to R1C9 which contains numbers from 1 to 9. One side of the diagonal follows the rules of thermo sudoku. The other side of the diagonal follows the rules of arrow sudoku..

PUZZLE NO. 18 : RENBAN SUDOKU

RULES : Classic sudoku rules apply. Additionally , marked lines contain consecutive digits in any order.                  

PUZZLE NO. 17 : KILLER SUDOKU

RULES : Classic sudoku rules apply. Additionally, the number on the top left corner of each cage is equal to the sum of the numbers in the cage. Numbers do not repeat inside a cage.

PUZZLE NO. 16 : EXTRA REGIONS SUDOKU

RULES : Classic sudoku rules apply. Additionally , each group of nine coloured cells must also contain the digits 1 to 9.                                           

PUZZLE NO. 15 : CLONE TWINS SUDOKU

RULES OF CLONE TWINS

RULES : There are two grids. Classic sudoku rules apply on both . Moreover , both the grids are twins , i.e, they have identical numbers throughout . Some cells are shaded in both the grids. One grid is clone sudoku , i.e. digits in each corresponding cell in both shaded figures are identical . The other grid is consecutive clone sudoku , i.e. digits in each corresponding cells in both shaded figures are consecutive. You have to determine which grid is clone and which is consecutive clone and solve both the grids.

PUZZLE NO. 14 : KILLER SUDOKU

RULES : Classic sudoku rules apply. There are some cages in the grid. The number on the top left corner of each cage is equal to the sum of the numbers in that cage. Numbers do not repeat inside a cage.

PUZZLE NO. 13 : RHOMBUS SUDOKU

This variant appeared in the World Sudoku Championship this year. I had created this as practice material .

RULES OF RHOMBUS SUDOKU

Apply classic sudoku rules . Additionally , the sum of digits on the vertices of each rhombus is a multiple of the digit at the centre of the rhombus.

PUZZLE NO. 12 : CLONE SUDOKU

   

             RULES : Classic sudoku rules apply. Additionally , digits in each corresponding cell in both shaded figures are identical.( Special thanks to Pranav Kamesh for testing this sudoku and giving his feedback ).

PUZZLE NO. 11 : MIRROR SUDOKU

                

            RULES : Classic sudoku rules apply. Additionally , the 1st & the 9th box are mirror images of each other ; similarly , the 3rd & the 7th box are mirror images of each other.

PUZZLE NO. 10 : ARROW SUDOKU

        

         

RULES : Classic sudoku rules apply. Additionally , 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.

PUZZLE NO. 09 : ANTI DIAGONAL SUDOKU

        RULES : Classic sudoku rules apply. Additionally , each main diagonal must contain exactly three distinct digits.

PUZZLE NO. 08 : CONSECUTIVE PAIRS SUDOKU

RULES : Classic sudoku rules apply. If a white circle is given between two adjacent cells , then the numbers in those cells will be consecutive. Not all white circles are given , which means adjacent cells without a white circle may or may not contain consecutive numbers.

  

PUZZLE NO. 07 : KILLER SUDOKU

RULES : Classic sudoku rules apply . Additionally , the number on the top left corner of each cage is equal to the sum of all digits in the cage . Digits cannot repeat inside a cage.

PUZZLE NO. 06 : RENBAN SUDOKU

                               

THEME : SMILE PLEASE              

RULES : Classic sudoku rules apply. Additionally , marked lines contain consecutive numbers in any order.
                             

                                                         

PUZZLE NO. 05 : ODD EVEN BRIDGE SUDOKU

          

 I had submitted this sudoku for the Puzzle Innovation Contest at the World Sudoku Championship this year. This idea of mine won me the first prize in the Puzzle Innovation Contest. 

RULES : Classic sudoku rules apply. There are some pairs of circles connected by bridges. Each connected pair of circles has one even number and one odd number. The even number denotes the number of even numbers along the bridge and the odd number denotes the number of odd numbers along the bridge. The numbers on the circles are not counted. Numbers can repeat on the bridges.

PUZZLE NO. 04 : THERMO SUDOKU

RULES : Classic sudoku rules apply. Additionally, there are some thermometer shapes in the grid.The numbers are in increasing order from the bulb to the flat end on each thermometer.

PUZZLE NO. 03 : ODD EVEN SUDOKU

THEME - DIWALI LAMP

RULES : Classic Sudoku rules apply. Additionally, cells having grey circles will contain only odd digits . Cells having grey squares will contain only even digits. 

PUZZLE NO. 02 : EXTRA REGIONS SUDOKU

RULES : Classic Sudoku rules apply. Additionally, each group of nine coloured cells must also contain the digits 1 to 9.

PUZZLE NO. 01 : PALINDROME SUDOKU

RULES: Classic Sudoku rules apply. Additionally, digits along the given lines read the same from either direction on the line.

Hello everyone. I am Akash Doulani from Kolkata, India. I would call myself a decent Sudoku solver  . I have authored sudokus for some online competitions like Sudoku Mahabharata and Sudoku gp to name a few. I have represented India in team B in world Sudoku championship in Slovakia in 2016. Through my blog I would be publishing sudokus thrice a week with varying difficulty levels which I hope you would all enjoy solving.   Wish you all happy Sudokuing....