Duo Sudoku 8x8 [WSC 2009]

Post Reply

Is this suitable for a Sudoku competition?

Yes
5
42%
Maybe
1
8%
No
6
50%
 
Total votes: 12

detuned
Posts: 1827
Joined: Mon 21 Jun, 2010 2:25 pm
Location: London, UK
Contact:

Duo Sudoku 8x8 [WSC 2009]

Post by detuned » Fri 28 Dec, 2018 3:20 pm

Screen Shot 2018-12-28 at 15.15.06.png
Screen Shot 2018-12-28 at 15.15.06.png (213.09 KiB) Viewed 1470 times
Source: 2009 World Sudoku Championship, Zilina

If you wish to solve the puzzle, please ignore the left hand grid, which is simply an 8x8 Irregular Sudoku. The right hand grid is the puzzle in question. This puzzle was linked with another puzzle which I haven't included - in order to be able to solve this example you need to know that R1C5 is a 4.

The main thing to note about this example is that it requires each of the numbers 1-4 to be place twice (rather than once) in every row, column, and marked 4x2 box.

Post Reply