solve

 sudoku

   step 1 2 3 4 5 6 7 8 9 10
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A very easy puzzle to get the idea of how sudoku is solved
© Roger Walker
explanations:-
this is step 1


The numbers given for this easy puzzle are in red.

Columns are c1 to c9
Rows r1 to r9
3x3 boxes 1 to 9

ie.the 8 in box1 is at c1r3

The rules -
Each column, row and 3x3 box must contain the numbers 1 to 9 once

I start by looking at rows of boxes (like boxes 7, 8 and 9) or columns of boxes looking for easy numbers that can only go in one cell.

See solution at step 10 to see what we are trying to achieve
c1
c2
c3
  
c4
c5
c6
  
c7
c8
c9
 
 
 
1		      
6 		   
3		  
r1
 box

1
2
&
3
   box 1        box 2    
9		  box 3 
5
r2

8		      
7 		       
4 		 
r3

9
8
3		    
2		        
7
r4
 box

4
5
&
6
   box 4 
4 		 
8		  box 5
5 		     box 6   
r5
   
7 		   
6 		   
1		    
r6
 
3		    
1 		         
9
r7
 box

7
8
&
9

4 		 box 7 
5		  
6		  box 8        box 9   
r8
 
6		    
9
8
4		  
5		    
r9

Solving Sudoku

When you first see a Sudoku puzzle , they can come across as slightly daunting and confusing to look at. However once you understand the mechanics of the game and attempt a few of them, you should find that it gets easier and easier to understand and figure out. Of course ,just like most games there are different difficulty levels. They can start off as quite simple and then get harder. There are plenty of guides out there which can help you learn important Sudoku techniques such as "three-in-a-bed", "right pair" and many others. Good luck!



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15th january 2010 © 2014