# December Sudoku, #177, #178, #179 & #180

### By: Dan LeKander

Volume 18, Issue 12, December 2023

Here is some Sudoku fun when the temperatures drop!

### Clueless?

We start with a Sudoku puzzle in progress, where it appears that there are no more obvious or not-so-obvious clues.  Can you find the hidden clue in Puzzle #177?

(The answer follows the conclusion of Puzzle #180, the feature puzzle for this month)

### Simply a Logic Puzzle

Difficult rating … 4/10
(Rating based on puzzles not requiring advanced techniques)

### Impossible to solve?

Impossible?  No.  Difficult?  Extremely.   Puzzle #179 will be challenge for you.  Advanced Techniques (Steps 6 and/or 7) are required.  Difficult rating 9.5/10.

### Feature Puzzle

Difficult rating … 7/10
(Rating based on puzzles requiring advanced techniques)

### PUZZLE PREPARATION

Prior to utilizing techniques 1-8, complete the 5 Steps of Puzzle Preparation …

1. FILL IN DATA FROM OBSERVATIONS
4. MARK UNSOLVED CELLS WITH OPTIONS THAT CANNOT EXIST IN THOSE CELLS
5. FILL IN THE OPTIONS FOR THE UNSOLVED CELLS

(hint … If you need a refresher on Step 6, please click the April 2023 issue)
May the gentle winds of Sudoku be at your back,

By Dan LeKander

Clue for Puzzle #177 …  What is your next move?
C1R3=5.  This should be a fun puzzle for you to finish.  Difficulty rating 2/10, advanced techniques not required.
__________________________________
Editor’s Note:  Dan would like to hear more from his readers regarding questions, comments, and suggestions.  To confidentially reach Dan, please e-mail him at this address … info@thousandislandslife.com

Recently someone wrote to ask how to fill them out online. Unfortunately, you need to print them yourself,  but that is easy to do and I know you will have just as much fun. Also you can use a grid sheet and copy numbers onto the grid.

And, if you have not already done so, I suggest you purchase Dan’s book: “3 Advanced Sudoku Techniques, That Will Change Your Game Forever!” Purchase of a book includes a 50-page blank grid pad, 33 black and two green tokens. The book is available by contacting info@thousandislandslife.com.

### Past Issues

Dan recommends the following Steps to complete the puzzles.

Step 1:  Sudoku Pairs, Triplets and Quads – See September 2015
Step 2:  Turbos & Interaction – See October 2015
Step 3:  Sudoku Gordonian Rectangles and Polygons – See November 2015
Step 4:  XY-Wings & XYZ Wings – See December 2015
Step 5:  X-Wings – See January 2016

Posted in: Volume 18, Issue 12, December 2023, Sports