Help |
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New game
- start new game
Restart game - replay current
game
Solve game - solve current game
Select cell, then tap desired digit button
or
Select digit button, then tap one or more desired cells
Select cell, then tap ?
or tap same digit button as cell
or
Select ?, then tap one or more
cells
Tap Undo
to undo last digit entry or deletion
Tap Redo to restore the last
undo
Select ?,
then select cell, then tap digits
or
Select ?, then select digit,
then tap cells
Select ?,
then select cell, then tap digits to be removed (tap ?
to remove all)
or
Select ?, then select digit,
then tap cells to remove that digit
or
Double-tap ? to remove marks in
all cells
With Auto ?
off, pencil marks are entered manually. Select Auto
? to mark in all cells automatically. Auto marks update as
digits are entered or erased and can be further deleted manually. Unselect
Auto ? to turn off auto mode and
return to manually entered marks. When Auto
? is on, double-tap ?
to restore erased marks in all cells
Help -
display help (this screen)
Reset stats - zero out all
statistics
Digit highlighting - highlight
all cells with currently selected digit as entry and/or mark
Error indicators - indicate
which cells are in conflict and/or incorrect
Color schemes - select desired
color motif
Hint display - select whether
hints display for only next entry or are continuously updated
5
(black) = clues
5 (green) =
correct entries
(if Error
indicators = Errors
or Both)
5 (red) =
incorrect entries
(if Error
indicators = Errors
or Both)
5 (blue) = all
entries
(if Error
indicators = Conflicts
or Off)
5
(purple) = marks entered with auto ?
off
5 (blue) = marks
determined by auto ? on
5 (pink) = marks
deleted with auto ? on
= cell selected for entry of digit or marks | |
= cell contains currently selected digit | |
(if Digit highlighting = Digits or Digits & Marks) | |
= cell marks include selected digit | |
(if Digit highlighting = Digits & Marks) | |
= duplicate digit in row, col, or 3x3 box | |
(if Error indicators = Conflicts or Both) |
= digit button not selected | |
= digit button selected | |
= digit completed |
Correct so far?
- report whether or not the grid has errors
Suggest technique - suggest
technique for finding next easiest to solve
Suggest digit - highlight digit
that is next easiest to solve
Suggest cell - highlight cell
that is next easiest to solve
Reveal one answer - fill in the
answer for some cell
No hint - turn off hint display
Set bookmark
- remember game at this time
Back to bookmark - revert game
to the last time Set bookmark
was pressed
Back to last correct - revert
game to last time all entries were correct
For no visual assistance in seeing digits, turn Digit
highlighting to Off.
For more assistance, set Digit
highlighting to Digits,
tap a digit, and use highlighted values to identify other cell locations
for this digit.
For the most assistance, set Digit
highlighting to Digits
& Marks and turn on Auto
?. Now tapping a digit will help identify rows, columns, or
3x3 boxes with single remaining locations for this digit (hidden singles).
For no visual assistance in seeing errors, turn Error
indicators to Off.
Setting Error indicators to Conflicts
(or Both) will reveal when the
same digit entered twice in the same row, column, or 3x3 box.
Setting Error indicators to Errors
(or Both) will reveal whether
an entry is correct (green) or incorrect (red).
The commands Correct
so far?, Suggest technique,
Suggest digit, Suggest
cell, and Reveal one answer
provide an increasing amount of information that can be used to make
progress.
The Hints commands first look
for the last empty cell in a row, column, or 3x3 box, then a single
candidate remaining in a row, column, or 3x3 box (hidden single), then a
single candidate remaining in a cell (naked single), then cells with the
least remaining candidates.
Pencil marks can be entered manually,
automatically, or in combination.
With Auto ? off, pencil marks
can be entered manually to indicate possible values in a cell or possible
cell locations for a value.
Turning Auto ? on saves any
current manual marks and marks in all candidates in all cells. As digits
are entered or erased, marks in related cells are removed or added back,
so that auto pencil marks are always correct.
Pencil marks can be manually erased (made dim) while Auto
? is on. A technique often used in harder games is to rule
out candidates one at a time in cells which can't be solved.
When Auto ? is turned back off,
the previously saved manual marks are restored.
For more difficult puzzles, the trial-and-error or
"Nishio" method is popular. When using this technique, Error
indicators should not be set to Errors
or Both, otherwise correct and
incorrect entries will be revealed immediately. Also Auto
? is usually turned on as an aid.
Upon reaching a point in the game where guessing is desired, find a cell
with, say, two candidates. Tap the cell to select it, then tap Back
and then Set bookmark to
remember the current state of the grid and this selected cell.
Now enter one of the candidate values into this cell and continue playing
the game, either to a successful conclusion or to a dead-end. If at a
dead-end, tap Back and then Back
to bookmark to revert the grid back to the first bookmark
with the previously selected cell highlighted. The second candidate can
now be confidently entered into this cell, since the first guess led to a
dead-end.
Multiple bookmarks are handled as a stack so that all possibilities at
multiple bookmarks can be explored by backtracking. Each Back
to bookmark command reports the number of previous visits
to this bookmark to help with which guess to try next. If after going Back
to bookmark there are no more candidates to try at that
bookmark, tap Back to bookmark
a second time to go back to earlier bookmarks.
A shortcut to backtracking is to select Back
to last correct, which reverts the game to the last time
all entries were in fact correct.
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Wildcrest Associates
All rights reserved