LEVEL
Rows:
Cols:
Challenge Mode
INSTRUCTIONS
Left Click to toggle
Shading
of squares
Right Click to toggle
Impossible
&
Confirmed squares
Left Click on hint grid to confirm the row/column (all
blanks
will be
red
and
filled
will be
green
)
Right Click on hint grid to clear the row/column
Program will tell you when you have found the solution (now supports duplicate solutions).