Sunday, January 25, 2015

Word Search Sudoku (Daily Sudoku League #87)


Word Search Sudoku appeared in World Sudoku Championship 2009 and this current puzzle, I created before WSC 2009 for the practice to Indian team. From last five years I have not published this puzzle anywhere. In fact this puzzle was lost from my computer and suddenly few months back, I found this Word Search Sudoku my mails. After World Sudoku Championship 2009, I have not seen this Sudoku type in many of the online championships.


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Saturday, January 24, 2015

Jigsaw Sudoku or Irregular Sudoku (Mini Sudoku Series #23)


Irregular Sudoku is also known as Jigsaw Sudoku. As both of these names are famous, I am using both these names while publishing this puzzle type. 
Recently, my 9 year old daughter started learning Sudoku variations and I have one more 6 year old student who is very much interested in learning Sudoku. For both of them I am creating Mini Sudoku Variations of Sudoku so that they can easily understand these puzzles. I have earlier created 6x6 Irregular Sudoku which was published here with title Irregular Sudoku (Mini Sudoku Series #19). However I felt that to make kids understand this puzzle type 5x5 Sudoku will be better. So, I created this puzzle but giving minimum hints possible here, so most of  techniques to solve Jigsaw or Irregular Sudoku can be applied here. 
I am posting this 5x5 Jigsaw or Irregular Sudoku as 23rd Sudoku in Mini Sudoku Series.
Rules of Irregular Sudoku
Place a digit from 1 to 5 in each empty cell so that each digit appears exactly once in each row, column and outlined region. Each outlined region is marked by thick borders.

Previous Mini Sudoku Series puzzle: Diagonal Sudoku or Sudoku X (Mini Sudoku Series #22)


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Friday, January 23, 2015

Diagonal Sudoku or Sudoku X (Mini Sudoku Series #22)


Diagonal Sudoku is also known as Sudoku X. It is because two main diagonal should also contain the unique numbers and if these diagonals are marked, these form X shape. 
Anyway as Diagonal Sudoku is quite standard name for this Sudoku, I will call it Diagonal Sudoku instead of Sudoku X. 
This is my second Diagonal Sudoku in Mini Sudoku Series. Previous Diagonal Sudoku is posted with title Diagonal Sudoku (Mini Sudoku Series #17).
I am  as posting this Sudoku as 22nd Sudoku in Mini Sudoku Series.
 

Diagonal Sudoku or Sudoku X (Mini Sudoku Series #22)
Diagonal Sudoku (Mini Sudoku Series #22)



Previous Mini Sudoku Series puzzle: Product Sudoku (Mini Sudoku Series #21)


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Thursday, January 22, 2015

Eliminate Sudoku (Daily Sudoku League #86)


Eliminate Sudoku type first time I saw in 9th World Sudoku Championship 2014. This Sudoku I created for the practice of Indian Sudoku team.
I generally able to create most of Sudokus in my first attempt. However this Sudoku took 3 attempts to make is correct. My first version has all the arrows given in heart shape, but it did not worked. I tweaked some of the arrows and later found that now my Sudoku was not unique. Then I tried to exchange some numbers which made this Sudoku wrong and this mistake was found by Prasanna during his testing of this puzzle. In my next attempt I removed some of the conflicting arrows. Removing some of the arrows made this puzzle correct as well as little more tough. This puzzle is having very narrow solving path and so I will rate it tough. 

This Eliminate Sudoku is my 86th contribution for The League of Extraordinary Ladies and Gentlemen.


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Sunday, January 18, 2015

Frame Sudoku (Daily Sudoku League #85)


This puzzle I prepared for the practice of Sudoku Mahabharat Math Variations. However this Sudoku is very tough and only for expert Sudoku solvers. This Sudoku is having a very narrow logical path to solve it which will be difficult to find for beginners.  

This Frame Sudoku is my 85th contribution for The League of Extraordinary Ladies and Gentlemen.

Rules of Frame Sudoku
Classic Sudoku Rules apply. Additionally numbers outside the grid equal the sum of the digits appearing in the cells in the first box (till the next bold line) seen from that edge of the grid.



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