How to play:
Click on a square to select it. You can also drag your mouse to change the selection.
Then click on the number pad to enter or remove a number or
Click on notes pad to enter or remove notes.
One click adds a number/note another removes it.
Click outside the grid or on non-editable number to remove selection.
Click the "Full Screen" button to toggle full screen.
Use the Arrow keys to select a square.
Use keys 0-9,A-F to enter or remove numbers
Use Shift+0-9,A-F to enter or remove notes
Use Del key to remove a number
Use Esc or Space to clear selection
Use Command+F to toggle full screen.
You can close the application at any time. When you return you will start from where you left off.
Please read all other sections for more details, useful hints and shortcuts.
To enter the main menu click the Main Menu button or choose "Preferences..." from the application menu.
To exit the main menu when the puzzle is still unsolved - click outside of it.
To exit the main menu when the puzzle is solved - start a new puzzle or reset the current puzzle.
New puzzle; Reset the current puzzle; Change skin; Read the Manual;
Sound on or off; Enable and disable the game timer; View Statistics;
Change the level;
The new level setting will take effect when you start a new puzzle.
- AutoFill Mode - all notes will be auto-filled and then kept in sync.
You can remove notes. You can add notes only if you previously removed them.
As in all Sudoku games with AutoFill mode enabled: it is just too easy to play level one, so use it only for higher levels.
You can switch back to manual mode - the auto populated notes will remain.
- Manual Mode - you are responsible for adding and removing notes.
- Manual Mode with "smart notes" - the game will auto cleanup the corresponding notes when you enter a new number.
Double-click/Enter Key shortcuts:
- Have only one note in a square? Double-click it or press Enter when selected - no need to use the keypad/keyboard - the note will be replaced with the number;
- To quickly remove a number you entered - just double-click it or press Enter when selected;
- If a row, column or box(4x4 box of 16 squares) is populated with unique numbers and
there is only one number left - double-click it or press Enter when selected - no need to use the keypad/keyboard - the last number will automatically appear.
- Wrong Number - When the entered number doesn't match the real number it will be colored in red and you will hear an alert sound.
- Conflicts - When the entered number conflicts with another number on the same row, column or box it will be colored in red and you will hear an alert sound.
In this mode you will also be alerted if there are hidden conflicts.
- OFF - No alerts.
If it looks like you have solved the puzzle, but nothing happens or if the numbers don't make sense - enable Wrong Number Alert to see what is wrong.
- When nothing is selected click and hold a number in the number pad or 0-9,A-F key. All squares containing this number will be highlighted;
- When nothing is selected click and hold a number in the notes pad or Shift+0-9,A-F key. All squares containing this note will be highlighted;
This feature will allow you to solve the puzzle much faster.
For some players it is half of the fun to find the correct notes by themselves and solve it without any extra help. Don't use the feature if you are one of those players.
In Sudoku 16x16 each number can appear exactly 16 times (of course you can have more than 16 displayed on the grid due to errors and alerts being off).
So if 16 (or more) instances of the same number appear on the grid the number will be marked as "Completed" with a star sign close to the number on the Notes Pad.
Hide/Show Notes feature:
- To temporary hide the notes press the "Hide Notes" button from the quick menu.
- To unhide(show) the hidden notes press the "UnHide Notes" button.
- Starting a new game, changing Auto Mode settings, resetting the puzzle, etc. resets this feature.
- Do not confuse this feature with "Clear Notes" manual mode feature which clears all notes you entered while "Hide Notes" just hides them temporary.
- You can still see the notes marked on the notes pad (even if hidden), by selecting a square.
Other functions and features:
- Hint - press the "Hint" button and one number will be revealed.
- Clear Notes - clears all notes in manual mode.
- Statistics - view game statistics.
About this manual:
This manual is intended for beginners and intermediate Sudoku players. There are many complex and detailed online Sudoku guides and manuals that you can use to learn more advanced techniques.
PART I - Notes:
The notes are hints that show the possible numbers that can be placed in a certain square. They are also called "candidates".
Populating the notes manually is a lengthy process for such a big puzzle and can take a few hours.
On the positive side - you will probably solve 1/3 of the puzzle while working on the notes.
You can always use the AutoFill feature to populate the notes automatically and keep them in sync.
This manual assumes that the notes (candidates) are manually or auto populated and correct.
Part II - Squares with a single note:
If a square ended up with only one note - this means that there is only one possible number that can be put there.
Just replace the note with the number.
You can use one of the double-click/Enter key shortcuts - double click it or press Enter when selected and the note will become the number.
After each move you make - scan the grid for such squares.
Part III - One Unique note in a row, column or 4x4 box:
A row, column or box can have all kinds of notes populated in their squares.
But if one note appears only ONCE in the set of notes part of row, column or box - you can
safely put the number of this note in the square, regardless of the other notes in that square, row, column or box.
This is a very useful technique. The hard part is to find such notes. They are easier to spot in a box than in a row or a column.
Some suggestions of how to find such unique notes:
- Scan the grid for open numbers that appear more often the others. When you find such a number scan the boxes, rows, and columns for unique notes of this number.
- When you find a unique note and put its number in the square - scan the same row, column and box for other unique notes. Often you can find more than one.
- Use the Number-Finder feature to speed the process.
Part IV - Repeated note pairs:
If two same notes are only present in two squares that are part of a box, row or column, this means that those two numbers can be present only in the two squares.
So you can safely eliminate/remove the notes for the two numbers from all other squares in the row, column and box.
By doing this you can find squares with a single note (See Part II) or other repeated notes pairs.
Part V - Repeated note triples:
If 3 squares (part of a box, row or column) only have notes for the same 3 numbers -
this means that those 3 numbers can be present only in the 3 squares.
So you can safely eliminate/remove the notes for the 3 numbers from all other squares in the row, column and box.
Not all of the 3 numbers need to be present in each square - as long as they are unique and present only in the 3 squares - the same rule applies.
Examples for valid combinations:
12F 12F 12F, ABC ABC AB,
1FA 1FA FA, 5EF 5F 5E(example bellow),
AB AC CB, 23 3A 2A(Part VI example).
Part VI - Hidden repeated note pairs:
The hidden pairs are just like regular repeated pairs(See part IV), but are hidden among other note candidates and therefore more difficult to spot.
When two same notes are only present in two squares part of a box, row or column, even though there are other candidates in the same squares - you can treat those notes
as a regular repeated note pairs. You can safely eliminate the other notes from the two squares. Example:
In the example you can eliminate the "3" and "2" candidate from the squares with "35D" and "25D" notes.
NOTE: You can achieve the same result if you process the repeated note triple 23 3A 2A.
You can apply the same principle for hidden repeated note triplets if you manage to locate them.
If you have any thoughts, ideas, suggestions of how to improve this app or this manual - please contact us.