Franklin SUDOKU SDU-320 User Manual page 19

2. The default puzzle number is 001 and the
first digit blinks.
3. Enter the number of the puzzle you want to
try.
Press the digit you want to change, then
press the dash to the left or right of the
number to decrease or increase the blinking
digit, respectively. Note: You can select a
puzzle number of 001 to 400. When number
is changed, the level changes to indicate the
skill level of that puzzle.
Press and hold
4. Press START to begin the selected puzzle.
5. Solve the puzzle just as you would any
generated puzzle.
for 3 seconds to exit.
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