Sudoku 42: Renban Sudoku

Rules: Classic Sudoku rules apply. Additionally, marked lines should contain consecutive digits, in any order.

Link:

Solve Online

Solution

Sudoku 41: Palindrome Sudoku

Rules: Classic sudoku rules apply. Additionally, the digits in the cells with lines form palindromes, i.e. they read the same from both the directions. 

Links:

Solve Online

Solution

Sudoku 40: Consecutive Sudoku

Rules: Classic sudoku rules apply. Additionally, adjacent cells containing consecutive numbers are marked with a bar. All possible bars are given.

Link: 

Solve Online

Solution 

Sudoku 39: Classic Sudoku

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

Link:

Solve Online

Solution

Sudoku 38: 1-5-9 Sudoku

Rules: Classic sudoku rules apply. Additionally, digits in the first column indicate in which column digit 1 is placed in the respective row, digit in the fifth column indicate in which column digit 5 is placed in the respective row, digit in the ninth column indicate in which column digit 9 is placed in the respective row.

Link:

Solve Online

Solution

Sudoku 37: 0-9 Sum Frame Sudoku

Rules: Place digits 0-9 in every cell such that no digit is repeated in any row, column or 3×3 block. Clues outside the grid indicate the sum of the digits in the first three cells from that side.

Sudoku 36: Thermo Sudoku

Rules: Classic Sudoku rules apply. Additionally the digits in the thermometer shapes must be strictly increasing in each cell from the round bulb to the flat end.

Link:

Solve Online

Solution

Sudoku 35: Search 9 Sudoku

I wish all of you a very Happy Sudoku Day! Posting a Search 9 Sudoku for the special day. Happy Sudokuing!

Rules: Classic Sudoku rules apply. Additionally, each arrow points to the 9 in the respective row or column. The number in the cell with the arrow is the distance from the cell to the 9 in this row or column.

Links:

Solve Online

Sudoku 34: Anti Knight Sudoku

Rules: Classic sudoku rules apply. Additionally, no two identical digits can be a chess knight's move away from each other. 

Sudoku 33: Little Killer Sudoku

Firstly, I wish a very happy Independence Day to all the Indian readers. I had thought to create something special for the day. But I have not been keeping well for some days and was also creating for TSC finals. So, I have created a 6x6 Little Killer with the theme 73 for the 73rd Independence Day.

Rules: Apply Classic Sudoku rules. Additionally, numbers with arrows indicate the sum of the numbers in that direction.

Link:

Solution

Sudoku 32: Renban Sudoku

Rules: Classic Sudoku rules apply. Additionally, marked lines should contain consecutive digits, in any order.

Links:

Easier Version

Solution

Sudoku 31:Extra Region Sudoku

Rules: Classic Sudoku rules apply. Additionally, each group of 9 shaded cells will also have digits from 1 to 9.

Link:
Solution

Sudoku 30: Classic Sudoku

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

Links:
Easier Version
Solution

Sudoku 29: Palindrome Sudoku

Firstly, there were issues in the image quality for some of the recent posts. Apologies for the problem. I've changed the tools I use to create the images. I hope there won't be any such issues now.

Today I'm posting a Palindrome Sudoku:

Rules: Classic sudoku rules apply. Additionally, the digits in the cells with lines form palindromes, i.e. they read the same from both the directions. 

Link:

Solution

Sudoku 28: Quadruple Sudoku

Rules: Classic sudoku rules apply. Additionally, each digit at the intersection of four cells must be present in one of those four cells.

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Solution

Sudoku 27: Killer Sudoku

It has been one year of blogging. In this one year I posted 26 sudokus and was able to deliver what I had promised--a sudoku on the 1st and 15th of every month. I would like to thank all those who helped me in achieving this. Thanks to Pranav Kamesh, Akash Doulani, Gaurav Kumar Jain, Rakesh Rai, Aditi Seshadri and Falak Pahwa for testing the sudokus. Thanks to Swaroop Guggilam and Rajesh Kumar for helping me with eps files and improving the blog. Lastly, thanks to everyone for solving the sudokus, for giving your valuable feedbacks and helping me to improve the blog round the year.

Today I'm posting the sudoku, the creation of which gave me confidence that I can create good sudokus. It was created long back and many in LMI have also solved it. But I would like it to be there on the blog and any one who hasn't solved it earlier to solve; those who have solved earlier may solve once again ;) 

Rules: Classic Sudoku rules apply. Additionally, the sum of digits in cells inside every cage must equal the total given for the cage at the upper left cell. Digits do not repeat inside a cage.

Link:

Solution

Sudoku 26: Wildcard Sudoku

It has been almost a year of blogging and I have not posted any Wildcard Sudoku! Doesn't sound good ;) So, today I'm posting a Wildcard Sudoku with the theme 'W'. Hope you all like it.

Rules: Classic sudoku rules apply. Additionally, one digit acts as a wildcard. Cells with '>' symbol contain digits greater than the wildcard. Cells with '<' symbol contain digits lesser than the wildcard. It is a part of solving to determine the wildcard.

Links:

Easier Version

Solution

Sudoku 25: Even Sudoku

Rules: Classic sudoku rules apply. Additionally, cells marked with squares must have even numbers.

Link:

Solution

Sudoku 24: Odd Sudoku

Rules: Classic sudoku rules apply. Additionally, cells with circles must have odd numbers.

Links:

Easier Version

Solution

Sudoku 23: Multi Diagonal Sudoku

Rules: Classic sudoku rules apply. Additionally, every marked diagonal contains each number not more than once.

Links:

Easier Version

Solution

Sudoku 22: Arrow Sudoku

Today's sudoku is dedicated to my favourite Indian sudoku author. Yeah, to Ashish Kumar. Known for creating best themed sudokus, Ashish is one of the most modest persons in LMI. Here is a sudoku with his initials as the theme.

Rules: Classic Sudoku rules apply. Additionally, the number in a circle is the sum of the digits which are marked by its arrow.

Link:

Solution

Sudoku 21: Thermo Sudoku

I wish a very happy birthday to Pranav Kamesh. In the Indian sudoku & puzzling community, this name needs no introduction. At such a young age Pranav has attained so many feats. On a personal level, Pranav is the closest to me among the 5 champs who had started sudokuing with me. If you like a sudoku on this blog, you should thank Pranav as well. More than 60% of the sudokus till date have been tested by Pranav.

Here is a Thermo Sudoku with Pranav's initials as a theme.

Rules: Classic Sudoku rules apply. Additionally the digits in the thermometer shapes must be strictly increasing in each cell from the round bulb to the flat end.

Links:

Easier Version

Solution

Sudoku 20: Fortress Sudoku

Today I'm posting a Fortress Sudoku with the compulsory theme of the month. Hope you all like it.

Rules: Classic Sudoku rules apply. Additionally, a digit in a shaded cell must be greater than digits in all orthogonally adjacent white cells. 

Links:

Easier Version

Solution

Sudoku 19: Odd Sum Pair Sudoku

Rules: Classic Sudoku rules apply. Additionally, a dot between two cells implies that the sum of digits in those two cells is odd. Not all dots are given.
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Solution

Sudoku 18: All Odd or Even Sudoku

The last fortnight has been quite packed for me. I couldn't create any sudoku for today beforehand. So got late in posting today :(

Rules: Classic Sudoku rules apply. Additionally, the shaded cells in each 3x3 box will be either all odd or all even.
Theme: S
Link:
Solution

Sudoku 17: Killer Sudoku

I wish you all a very happy new year. Hope you all have a great year and life ahead.
As the year 2019 is beginning today, I'm posting a Killer Sudoku with the Theme 20-19. 
Though I had created this sudoku before the IB was published, Killer Sudoku is also a part of the upcoming Sudoku GP. I hope this serves as a good practice.

Rules: Classic Sudoku rules apply. Additionally, the sum of digits in cells inside every cage must equal the total given for the cage at the upper left cell. Digits do not repeat inside a cage.

Links:
Easier Version

Solution