Franklin SUDOKU SDU-320 - Manual (Page 12)

Note: If you do not want to play the
generated game, press and hold for 3
seconds to exit, then press START to
generate another game.
Some numbers are already filled in at the
start of a puzzle. These are indicated by an
underscore. These numbers are fixed and
cannot be changed.
These empty positions are the ones you
need to fill in. The cursor, indicated by “-”,
blinks in the first empty position.
4. Press the empty position where you want to
input a number.
If you place the cursor on a position you have
already filled, the number will blink. You
cannot move the cursor position to a fixed
number.
5. Press 1-9 to input the number you want.
Remember the rules of number placement:
Each number from 1 to 9 can only occur
once in every horizontal row, vertical
column, and 3 x 3 block.
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