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.