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Remember, numbers present at the start of the puzzle cannot be
changed. When you point to one of them, you will see a single
number below the grid, not a complete row.
Special Su Doku Features
Retract and replay:
You can retract a series of moves by
repeatedly pressing
. Any retracted moves in the same series may
then be replayed by pressing
.
Locked numbers:
To lock a guessed number into the grid, first
point to it and then press
. This button then changes to
. Press
to unlock a locked number. While locked, a number cannot be
deleted or overwritten. This is helpful if you are certain that the
number is correct.
Display of legal numbers:
The device can show you all the “legal”
numbers for any particular location. That is, all those numbers which
could be inserted at the current location of the cursor without
creating a conflict with another number in the same row, column
or 3x3 grid. To use this feature, touch “L” as it is displayed above
the row of numbers. Then whenever you point to a place where a
number can be inserted, you will see the “legal” numbers marked
with checks (
). To switch this feature off, touch “L” again.
Note pad:
You can make a note of a number as a potential guess
for a particular location. Point to the location you want, then touch
the area directly below the desired number in the row of numbers.
This marks the number with . A location can have as many
candidates as you like; they will be displayed whenever you point to
it. You can delete a candidate by touching .
Hint:
If you press
and then HINT, a flashing
appears in the
grid. This suggests where you should insert the next number. If you
now press
and then REVEAL DIGIT, the correct number is inserted
for you.