Rules, Tips and Tricks

1. Standard Sudoku rules (A & B - see below) apply
2.   The game can be played with Teams, Individuals, or a single person (Solitaire).
3.   The game can be played on a single iPad or two iPads.
4.   If two iPads are used, use AirDrop to make a Duplicate copy of the game on the second iPad.
5.   If you enter a correct number the color will be Blue.
6.   If you enter an incorrect number the color will be Red.
7.   If the number you enter is still Black, then Tap on “Next” or “Return” to enter the number.  You can also Tap any empty space outside of the spreadsheet to enter the number.
8.   Use the Score Card to keep score.  Enter the values from top left to right for each Team, Individual, or Solitaire.
9.  Enter Negative numbers in the Score Card for incorrect (Red) answers.  Enter Positive numbers when you enter a correct (Blue) answer.
10.   If you enter an incorrect (Red) number, then delete the Red number in the puzzle and try again.
11.   Maximum points for every game equals 405 (45 x 9) which includes the starting Black numbers in the puzzle.
12.   This is a fun game, therefore you can guess if you are stumped and cannot figure out the next logical number.  If your guess is incorrect (Red number) then enter a negative number on you Score Card.
13.   As shown in the SUbingDOKU Starter game, 4, 5, 7, 8 are possible correct answers for the first number you can enter.  Finding the 8 will give you a higher final score if you are playing against others.  The “3” in Row “19,” Column “F” is Red and therefore incorrect.
14.   As shown in the SUbingDOKU Starter game, you can pencil in optional numbers (e.g., 168 - 1, 6 or 8).  These optional numbers will appear Purple above the final number.  You can delete or modify them as needed.  The puzzle will be easier to solve if you delete these optional numbers after you find the correct Blue number.
15.   For Team or Tournament play, alternate between Team A and Team B  or  Individual A and B.
16.   A time limit can be placed on each turn if desired.  Use the iPad “Clock - Timer” feature.  Pick a fun sound like “Time Passing”.  Set the Timer to  1-minute, then “Start”.  Go back to your SUbingDOKU game and when the allotted time has passed your turn is over.

Standard Sudoku Rules

A.  Enter numbers into the grid so that each row, column and 3 by 3 box (block of cells), each contain every number from one through nine.

B.  Each puzzle only has one final solution.

Copyright ©️ 2020 Robert Joseph Gnibus  All rights reserved

How to download and open the ZIP file on your iPad

1. Before you download a SUbingDOKU TM puzzle from TpT, confirm you have a Downloads folder in your iPad Files app folder (on my iPad, a blue folder icon with a down arrow inside a circle - see thumbnail picture).
2. If you do not see the Files icon (a blue folder on your iPad), then go to the App Store.  Search for the Apple Files APP (Files Utilities).  If it says Open, then click.  If not, it may require you to download the Files APP
3. Also, before you download a SUbingDOKU TM puzzle from TpT, create a new folder called SUbingDOKU Downloads in the blue Files app folder on your iPad.  Why? You will make a copy of the original SUbingDOKU puzzle and save it in the SUbingDOKU Downloads folder.  You could accidentally change the formatting and scramble the Numbers spreadsheet puzzle.  This step will ensure that you always have a master copy of the SUbingDOKU puzzle.
4. Download the SUbingDOKU TM puzzle from TpT
5. Open the blue iPad Files folder, then open the blue Downloads folder.
6. In the SUbingDOKU Download folder find the ZIP file from which you want to extract (e.g., SUbingDOKU ZIP.zip 110KB)
7. Tap the ZIP file (SUbingDOKU Zip.zip) to extract the spreadsheet
8. The Numbers spreadsheet SUbingDOKU Starter with Rules Zip (192KB) will appear.
9. Press and hold the icon for the SUbingDOKU puzzle.  Select copy, then paste the copy in your blue SUbingDOKU Downloads folder.
10. Tap SUbingDOKU Starter Rules Zip to open the Numbers spreadsheet
11. Click on the Edit in the top right corner
12. Resize the puzzle using two fingers on the screen near each other.  Spread them apart to make the puzzle bigger or move them toward each other to make the puzzle smaller.
13. Double-tap in the purple cell to open the keyboard.  Entering numbers into the SUDOKU puzzle will be easier if you switch from abc to 123.
14. The SUbingDOKU TM Puzzle was designed for fun. If you get stuck on the next move, just use an educated choice (guess). The “Numbers” puzzle is formatted to let you know if your guess is correct (Blue number) or incorrect (Red number). Incorrect Red numbers are just deleted and you can try again.
15. If the number you enter is still Black, then Tap on “Next” or “Return” to enter the number.  You can also Tap any empty space outside of the spreadsheet to enter the number.  My favorite, tap on the purple cell while you analyze the puzzle for your next move.