# Feedback and Questions

I've received a lot of interesting comments and questions from Sudoku fans over the last few years and this page
is where I try to answer them. Please feel free to drop me a note on the side of the page or try the Facebook
comment box. Or you can email me directly at andrew@str8ts.com.
**Post a Comment or Question here...**
## Saturday 11-Nov-2006

## ... by: Richard Broughton, UK

Load Sudoku: CLICK TO LOADfound this gem that my solver gives up on - and unfortunately so does yours (although your solver gets one further candidate reduction than mine)

Brute force will solve it - and your solution count indicates that there's only one solution.

I'd be interested to see if there is any strategy that can be applied to bring a logical conclusion to this problem

## Wednesday 8-Nov-2006

## ... by: JC Meyrignac, France

Load Sudoku: CLICK TO LOADAny idea how to solve it ?

## Saturday 4-Nov-2006

## ... by: Cargill, Czech Rep.

Load Sudoku: CLICK TO LOADHowever it has only one solution.

## Friday 3-Nov-2006

## ... by: Pompeo M. ACQUESTA, Italy

Load Sudoku: CLICK TO LOADI dont understand why in this sudoku

HIDDEN UNIQUE RECTANGLE removing 9 at J7 because of GJ17 and two strong links on 3

Thanks very much

Pompeo M. ACQUESTA

Roma

Italia

If any four cells contain a pair X/Y and three contain additional candidates, then one of X or Y can be eliminated from the cell diagonally opposite the bi-value cell if the other candidate in the pair forms two strong links along the row and column.

But I really need to expand and supply examples. It is in the forthcoming book, however!

## Wednesday 1-Nov-2006

## ... by: bente, My

Your solver is a fantastic trainer - actually! A great bulk of the hard-to-understand theories and technique are clearly demonstrated and explained by your solver. Yours is the best so far. It certainly helps me to progress tremendously. Thanks.

bente

General message for posters here: sorry I've not been around to respond last two weeks. Lots of good questions here. It will happen!

Andrew Stuart

## Tuesday 31-Oct-2006

## ... by: Randy, Portland, Oregon USA

Please consider and thank you again.

## Sunday 29-Oct-2006

## ... by: Territan, Glen Burnie, MD

Load Sudoku: CLICK TO LOADCould this be the example of the type 3 unique rectangle that you've been looking for? Or did the solver just do something really unaccountably weird?

## Saturday 28-Oct-2006

## ... by: raleigh, USA

## Wednesday 25-Oct-2006

## ... by: Ray, Rancho Cordova, CA, USA

Load Sudoku: CLICK TO LOADI'm new to sudoku and I am very impressed with your solver.

I have difficulty identifying hidden pairs when I see 3 or 4 sets of the pair values I want to use. How do you know which ones are bogus??

Well done. You made what I'd grade as a Tough sudoku. Excellent!

## Sunday 22-Oct-2006

## ... by: Leonard Trochez, Gretna, La

My question is : how do I print the Printable version?

I don't see a Print switch.

Thanks

Sorry for taking so long to reply. If you don't have a printer icon on your browser menu then [CTRL]+[p] will do the job

## Thursday 19-Oct-2006

## ... by: Sami, Lebanon

If I do step by step for the example "Riddle of Sho" it doesn't arrive at the final solution!