Consecutive N5

Todays puzzle is a Consecutive Sudoku. Rules of classic sudoku apply. Additionally, adjacent cells having consecutive numbers are marked by a bold line. If a bold line is not present then the numbers cannot be consecutive.

This puzzle is rated Medium.

Argyle Sudoku N3

Todays sudoku is an Argyle Sudoku. Rules of classic Sudoku apply. Additionally, a digit cannot repeat on any of the marked diagonals.

This puzzle is rated Medium.

For Solution Click Here.

Anti-Knight N4

Todays puzzle is an Anti-Knight Sudoku.

Rules of Classic Sudoku apply. Additionally, a digit cannot repeat at a cell which is at a knights step from itself.

This puzzle is rated medium.

For Solution Click Here.

ChessDoku N2

Todays puzzle is a ChessDoku. Fill up the grid with the digits 1 to 6, a King, Queen and a Knight(chessmen). Additionally, no King can attack another king. No Queen can attack another queen and a Knight cannot attack another knight.

This puzzle is rated easy.

For Solution Click Here.

Kropki N2

This Kropki sudoku was created by me for the Sudoku Mania contest that was held at the UKPA.

Rules of classic sudoku apply. Place numbers in the grid such that each row, column and 3x3 box contain the numbers 1 to 9. If the absolute difference between two digits in neighbouring cells equals 1, then they're separated by a white dot. If the digit in a cell is half of the digit in a neighbouring cell, then they're separated by a black dot. The dot staying between '1' and '2' can have any of these dots.

For Solution Click Here.

Consecutive N4

Todays puzzle is a Consecutive Sudoku. Rules of Classic Sudoku apply. Adjacent cells having a bold line have consecutive digits. If two adjacent cells do not have a bold line, then they cannot contain consecutive digits.

This puzzle is rated medium.

For Solution Click Here.

Diagonally Non-Consecutive N1

Todays puzzle is a Diagonally Non-consecutive sudoku. This is not to be confused with the combinational sudoku "non-consecutive diagonal".

Rules of Classic Sudoku apply. Additionally, only the diagonally adjacent cells cannot contain consecutive numbers.

This puzzle is rated medium.

For solution Click Here.

No donkey Step Sudoku N1

First of all sorry for being absent over the weekend. Had been busy overseeing the Sudoku Mania contest at UKPA.

Todays puzzle is a No Donkey Step Sudoku. Rules of classic sudoku apply. Additionally, no number may repeat within 2 spaces from itself, even diagonally.

This puzzle is rated easy.

For Solution click here.

Non-Consecutive N4

Todays puzzle is a Non-Consecutive sudoku. Rules of Classic Sudoku apply. Additionally, adjacent cells cannot contain consecutive numbers.

This puzzle is rated easy.

For Solution click Here.

Windoku N4

Todays puzzle is a Windoku Sudoku. Rules of Classic Sudoku apply. Additionally, marked regions contain digits 1 to 9 without repetition.

This puzzle is rated easy.

For Solution click Here.

Jigsaw N4

Todays puzzle is an Irregular Sudoku.

Fill the grid such that every Row, column and Outlined region contains the digits 1 to 9.

This puzzle is rated Hard.

For Solution Click Here.

Killer N4

Todays puzzle is a Killer Sudoku. Rules of Classic Sudoku apply. Numbers on top left of the cage is equal to the sum of the numbers inside the cage. No number can repeat inside a cage.

This puzzle is rated medium.

For Solution Click Here.

Untouch N3

Todays puzzle is a Untouch Sudoku. Rules of Classic Sudoku apply. Additionally a digit cannot touch itself even diagonally.

This puzzle is rated medium.

For Solution Click Here.

Windoku N3

Todays puzzle is a Windoku. Rules of classic sudoku apply. Additionally, the 4 marked regions also contain digits 1 to 9 with no repetition.

This puzzle is rated medium.

For Solution Click Here.

Diagonal N4

Todays puzzle is a Diagonal sudoku. rules of Classic Sudoku apply. Additionally the two main diagonals contain the digits 1 to 9 without any repetition.

This puzzle is rated easy.

For Solution Click Here.

Classic N4

Todays puzzle is a Classic Sudoku.

Fill the grid such that every row, column and 3x3 box contains the digits 1 to 9 with no repetition.

This puzzle is rated easy.

For Solution Click here.

March 2011 SudokuMania Contest

There will be a SudokuMania contest on the second weekend of March. The puzzle have been created by me for the UK Puzzle Association.

The contest will be on the UKPA website. The contest will begin at 9:00 PM GMT on Friday, 11th March and end at 3:00 AM GMT on 14th March 2011. For the contest page click here.

The test is of 2 hours duration. You can pick up the password anytime during the contest hours and you will have 2 hours post that to submit your solutions.

The contest deals with normal sudoku variants. the variants for the contest are :-

• Chessdoku 
• PanDigital Difference
• sequence Sudoku
• Kropki Sudoku
• Inequality Diagonal
• Classic Sudoku
• Consecutive Sudoku
• Non-Consecutive Sudoku
• Argyle Sudoku
• Jigsaw Sudoku
• Anti-Knight Sudoku
• Killer Sudoku  

All these variants have been discussed by me and examples are already on my blog if any body wants practice material. Hope to see you all at the contest.

AntiKnight-NonConsecutive N2

Todays puzzle is an Antiknight - NonConsecutive combination sudoku.

Rules of Classic Sudoku apply. Adjacent cells cannot contain consecutive numbers. Additionally a number cannot repeat at a knights step.

This puzzle is rated as an easy puzzle.

For Solution Click Here.

Inequality N3

Todays puzzle is an Inequality Sudoku, also known as Greater-than Sudoku. From today I will also be mentioning the difficulty level of the puzzle so that solver can have an idea as to how fast/slow they have solved it.

Rules of classic sudoku apply. Additionally, numbers in the 3x3 boxes follow the mathematical pattern of greater than or less than depending on the symbol between the two cells. This puzzle is of Easy difficulty level.

For Solution Click Here.

Asterisk Sudoku N2

Todays puzzle is an Asterisk Sudoku. Rules of Classic Sudoku apply. Additionally, the marked cells contain digits 1 to 9 without repetition.

For Solution Click Here.

Pandigital Difference Sudoku N1

Todays puzzle is the Pan Digital Difference Sudoku. Rules of classic sudoku apply.

Additionally, in marked boxes, the three-digit number in the third row is the result of the differnce between the 3 digit number in the first row and the three digit number in the second row. (ignore the number 0 on top of the cages)

For Solution Click Here.

ChessDoku N1

Todays puzzle is a chessDoku. 

Fill the grid such that every Row, column and 3x3 Box contains digits 1 to 6, a King a Queen and a Knight (chessmen)

Additionally, no Queen can attack another queen. Similarly rule applies for the Knights and the Kings.

For Solution Click Here.

Extra Region N3

Todays puzzle is an Extra Region Sudoku.

Rules of classic Sudoku apply. Additionally, the two marked regions also contain digits 1 to 9.

For Solution Click here.

Non-Consecutive N3

Todays puzzle is a Non-Consecutive Sudoku.

Rules of Classic Sudoku apply. Additionally, adjacent cells cannot contain consecutive numbers.

For Solution Click Here.

Visitors Info

I would like to take this opportunity to thank you all for the patronage. Today this blog completes 2 months and We have touched a mark of 1000 visitors last month. Attached below is the Google Analytics screenshot.

I hope to continue the same way and look forward to all your participation.

Thanks Again.

Renban Classic N2

Todays puzzle is a Renban Classic.

Rules of classic sudoku apply. Additionally marked regions contain consecutive digits, not necessarily in order.

For Solution Click here.

Melon's Puzzle Zoo

This weekend is a puzzle contest at LMI titled " Melon's Puzzle Zoo".

The author is Palmer Mebane.

The test will begin at 00:00 GMT on 26th Feb and end at 00:00 GMT on 28th Feb 2011. The duration of the test is 2 hours.

Discussions on this test at LMI are here.

The submission page and IB are here.

Diagonal Untouch Killer N1

Ok, I know a lot of people found the Double Delights a bit of a head spinner. I was just dabbling around trying to see if we could have three variants in one puzzle and the following puzzle is the result. I promise you I wont provide anymore "treble trouble" puzzles after this :)

Todays Puzzle is a Diagonal Untouch Killer. Rules of classic sudoku apply. Additionally, the two main diagonals contain digits 1 to 9. A digit cannot touch itself even diagonally and sum of numbers in a cage equal to the number given at the top left of the cage. No number repeats inside a cage.

For Solution Click Here.

Pandigital Sudoku N1

Todays puzzle is a Pan Digital Sudoku.

Rules of classic sudoku apply. Additionally in the 5 marked regions , the sum of the 3 digit number in the first row and the 3 digit number in row 2 is equal to the 3 digit number in the third row.

For solution Click Here.

Killer N3

Todays puzzle is a Killer Sudoku.

Rules of classic sudoku apply. Additionally the sum of the numbers within a cage equals the the given number at the top left of the cage. No number repeats within a cage.

For Solution Click Here.

AntiKnight N3

Todays puzzle is an Anti-Knight Sudoku.

Rules of classic sudoku apply, and additionally a number cannot repeat at a knights' step as in chess.

For Solution Click Here.

Consecutive N3

Todays puzzle is a Consecutive Sudoku.

Rules of Classic Sudoku Apply. Additionally adjacent cells containing consecutive numbers are marked by a bold line. Adjacent cells that do not contain a bold line do not contain consecutive numbers.

For solution click here.

Diagonal N3

Sorry for the delay in the new puzzle... Got caught up in the Double Delight Competition and took a break for a couple of days. Thank you all for the wonderful feedback on Double Delight.

Todays puzzle is a diagonal sudoku. Rules of Classic sudoku apply. Additionally the two main diagonals contain digits 1 to 9.

For Solution click Here.

Double Delight Results

Finally the weekend in over and so is Double Delight. It had been 2 hectic days being connected constantly in case any participants had a problem. Thankfully everything went off without a hitch or a glitch. WaterlooMathie of Canada took the first position followed by Thomas Snyder (2 time World Sudoku Champion) and Jakub Ondrousek (jaku111) from Czech Republic taking the third position. From the Indians Perspective, the top three Indians were Rohan Rao (Current National Champion), Gaurav Korde and M Jaipal Reddy.

The complete results are here.

From an authors perspective it was a mixed test for me. There were a total of 173 participants and 132 non-zero scores. Which means that 41 people decided to not submit any answers for whatever reasons.

But in the same breath as an author it was really heartening to see the feedback given by the 2 time World Sudoku Champion, Thomas Snyder on his blog,on the puzzles. Here is the link to Thomas' blog.

Rishi Puri

Greater Than X N1

Todays puzzle is a Greater than(Inequality) Diagonal sudoku. Rules of classic sudoku apply. Numbers follow the mathematical operations of less than or greater than as per given symbols. Additionally the 2 main diagonals contain digits 1 to 9.

For Solution Click Here.

Double Delight

Double Delight Starts in 9 hrs!

On 12/13th February 2011, LMI (logicmastersindia) will be hosting their February Monthly sudoku Test. This test is called Double Delight and is created by me. All puzzles are combinations of two common variants.

The test starts at 00.00 (GMT) 12th Feb 2011 and ends at 00:00 (GMT) 14th Feb 2011.


The test is of 120 minutes. You can start the test any time during the weekend of 12/13th February 2011 and will have 120 minutes to complete all the puzzles.

The puzzle types are :

• Diagonal — Non Consecutive
• Jigsaw — Anti Knight
• Diagonal — Killer
• Jigsaw — Killer
• Anti Knight — Killer
• Non Consecutive — Killer
• Jigsaw — Diagonal
• Disjoint — Anti Knight
• Disjoint — Diagonal
• Non Consecutive — Jigsaw
• Non Consecutive — Anti Knight
• Diagonal - Anti Knight

The IB can be downloaded here.


Discussion and Questions on the test can be done here at the LMI forum.

• For practice you can refer to the combination sudokus section on this blog.

Sequence Sudoku N1

Todays puzzle is a Sequence Sudoku. This sudoku was created by my wife and I for the Mock Test 19 at LMI.

Rules of classic sudoku apply. Additionally, numbers along the given lines are always in an arithmetic progression.

For Solution click Here.

Non-Consecutive N2

Todays puzzle is a Non-Consecutive Sudoku. Rules of classic sudoku apply. Additionally adjacent cells cannot contain consecutive numbers.

For Solution click Here.

XV N1

Todays puzzle is an XV sudoku. Rules of classic sudoku apply. Additionally, adjacent digits that add upto 5 are marked by V and cells that add upto 10 are marked by an X.

For Solution click Here.

Knight Non-Consecutive N1

Todays puzzle is a Knights Non-Consecutive. It is not to be confused with the Non-Consecutive-Anti-knight.

Rules of classic sudoku apply. Additionally, you cannot have a consecutive number at a knights step.

For Solution click here.

Irregular N3

Todays puzzle is an irregular sudoku, also known as jigsaw sudoku and chaos sudoku. Every row, column and irregular region contains digits 1 to 9.

For Solution Click Here

Classic N3

Todays puzzle is a Classic Sudoku. all rows, columns and 3x3 boxes contain digits 1 to 9.

For solution click here.

Asterisk Sudoku N1

Todays puzzle is an asterisk sudoku. Rules of classic sudoku apply. Additionally the disjoint marked cells contain digits 1 to 9.

for solution click here.

Killer N2

Todays puzzle is a Killer Sudoku. Rules of Classic sudoku apply. Additonally, sums of digits ina cage equal the total give for that cage. Digits do not repeat in any cage.

for solution click here.

Extra Region N2

Todays Puzzle is an Extra Region Sudoku. Rules of Classic Sudoku apply. Additionally, marked regions also contain digits 1 to 9.

For Solution click here.

Renban Diagonal N1

Todays puzzle is a Renban Diagonal. Rules of Classic sudoku apply. Additionally the 2 main diagonals also contain digits 1 to 9. Marked extra regions contain consecutive digits, not necessarily in sequential order.

For Solution Click Here.

Irregular N2

Todays puzzle is a Jigsaw Sudoku, also known as Chaos or Irregular Sudoku. Every row, column and irregular shaped region contains digits 1 to 9.

For Solution Click Here.

Tapa Variations contest V

It is indeed a great step forward for LMI as the Tapa Variation contest has moved to the LMI site from the oapc site. The 5th Tapa variation contest will be held on the weekend of 5th-6th February 2011.

The test will be of 75 minutes duration. The puzzles will be normal Tapa Variations. The IB will be uploaded by 31st Jan 2011.

Discussions on TVC are here.

Argyle Sudoku N2

Todays Puzzle is an Argyle Sudoku.

Rules of classic sudoku apply. Additionally, all marked diagonals have different digits and no digit repeats on any of marked diagonals.

For Solution Click Here.

Consecutive N2

Sorry, I got caught up in some personal works and could not devote much time to the blog. I hope to see that this kind of a break does not happen again. To continue our puzzle uploads, today's puzzle is a consecutive puzzle.

Rules of classic sudoku apply. All adjacent cells that contain consecutive numbers are marked by a thick line. Where the thick line does not exist, numbers cannot be consecutive.

For Solution Click here.