Techkriti Oh Seven! team brings for you...

Kakuro puzzle contest


Kakuro is a kind of logic puzzle that is often referred to as a mathematical transliteration of the crossword . In principle, Kakuro puzzles are Integer Programming problems, and can be solved using matrix techniques, although they are typically solved by hand.

The Japanese name Kakuro (abbreviation of Japanese kasan kurosu (加算クロス, addition cross)) seems to have gained general acceptance and the puzzles appear to be titled this way now in most publications. The popularity of Kakuro in Japan is immense, second only to Sudoku among Nikoli's famed logic-puzzle offerings.




First Prize:         Utkarsh Singhal (Y5722)


Second Prize:     Sanchit Sarraf (Y5402)

                             Aditya Sai (Y5032) 


Third Prize:        Hitesh Saraf (Y2169)

                         Prof. Rajesh Shrivastava (04798)

                         Ekta Makhija (Y3112)



Next seven correct entries were:

1.) Mani Shankar

2.) Vivek Thapliyal

3.) Atul Singh

4.) Kanishka Aman Singh

5.) Sahay Shrey

6.) Abhishek Ranjan

7.) Abhishek Mishra


Congratulations to all winners and thanks for coming.




Example and solution of the Problem:





Rules of the Game

Following rules one has to stick during this game.

  • You have 'across' and 'down' clues. A number in the top right corner relates to an “across” clue and one in the bottom left a “down” clue.
  • You must use the digits 1to 9 to sum up the clue associated to it.
  • No number can be duplicated in any of the across or down entry.

 or visit the following link. How to play Kakuro?



Although brute-force guessing is of course possible, a better weapon is the understanding of the various combinatorial forms that entries can take for various pairings of clues and entry lengths. Those entries with sufficiently large or small clues for their length will have fewer possible combinations to consider, and by comparing them with entries that cross them, the proper permutation — or part of it — can be derived.

The simplest example is where a 3-in-two crosses a 4-in-two:

the 3-in-two must consist of '1' and '2' in some order; the 4-in-two (since '2' cannot be duplicated) must consist of '1' and '3' in some order. Therefore, their intersection must be '1', the only digit they have in common.



First prize Rs. 400 (one prize)

Second prize Rs. 200 (Two prizes)

Third prize Rs. 100 (Three prizes)


Schedule and Venue

27th January.
First stage       : 5:15 pm to 5:45 pm
Second stage : 6:00 pm to 6:45 pm

Venue : L-7

(Please be there 10 minutes before time to make yourself comfortable.)




you have to register your name by sending a blank mail by 27th morning 8 am with subject "Reg-kakuro" (without quotes) to following mail-id.

This mail is important for us to know the approx. no. of participants. Though you can register yourself at the venue itself. There is no registration fee.

Don't hesitate to participate, even if you have not tried it earlier.


Rules and Instructions

  • The participant will be known by his login-id.
  • The competition will be held in two stages. The participants qualified in the first stage will be eligible for the second stage.
  • We will provide printed kakuro game on an A-4 sheet.
  • Please bring your own pencil(+eraser)/pen.

For further queries Contact:

Sumit Kumar Baranwal