Your Study Guides and Strategies starts here!
After you have completed the basic exercise above,
here is another strategy to consider.
The possibilities (in
green) for nines in the fourth row are in the last two cells
7  9  2  4  
5  6  
2  9  
4 
1 6 
3  2  8 
1 6 
5 
1 6 7 9 
1 6 7 9 








9 
Because you must have a nine in the fourth row in the shaded
box,
you cannot have a nine in the other rows of that shaded
box (the red nines).
Another strategy:
What can you guess about the middle rows
of the two shaded boxes?
Again, the possibilities for the
middle row of the middle box are in green:
5 
6  1  8  5  
2 5 
2 5 9 
2 9 

2  7  3  4  6 
Answer:
What can you guess about the middle rows of the
two shaded boxes?
Again, the possibilities for the middle row of
the middle box are in green:
5 
6  1  8  7  



2
5 
2
5 9 
2
9 
2 5 9 
2 5 9 
2 5 9 
2  7  3  4  6 
Answer:
In the middle box, only three numbers
2 5 9 are possible,
and there are only three spaces available. Therefore, those
possibilities are not possible in the spaces in the rows of the
other boxes.
Since there already is a 5 and 2 in the lefthand box, that eliminates 2 and 5 in the middle row.
9is not possible in its middle row since a nine must be in that row of the middle box..In the righthand shaded box, all three
2 5 9are not possible in the middle row and must be options in its empty spaces.
What's a Pappacom puzzle? What are symmetrical clues?
Computergenerated or handconstructed puzzles?