Feedback and Questions

Hi,

yetsterday (14.09.2011) i solved the daily Jigsaw, but when finished, 26 conflicts were reported. This morning i compared my solution, which have printed out, with the online solution and they are the same ???

with regards

Becko

Andrew, thanks for all the work you put into Sudoku. I am a rookie and have found your teaching very helpful.

recently I got ambitious and tried your diabolical competion from Aug 6

I managed to solve it however I have not yet learned diabolical strategies. I confirmed my solution to be correct on you Sudoku Solver. I stepped through this puzzle on your sudoku solver to see the strategies used and am sure I could not have used those strategies.

Is it possible to solve the competition Aug 6 using simple strategies??

the color did not print in color

Hi,

I think this site is fantastic. By keying in my unsolved grids and following the solution through step by step I am learning the more complex solving techniques which I was struggling with before. One question: how are the overall scores for grading worked out. Yesterday I had a puzzle which had a score of 182, today I have one with a score of 174. Does that make today's puzzle slightly easier though they are both rated as tough?

Many thanks,

Hache

Hi Andrew.

The attached Sudoku is a Colour Sudoku, and while using your solver on it when I got stuck I noticed that your solver lacks a rather simple Colour/Line Reduction technique, which should be one of the top techniques, likely #8 on the list (under 7 Box/Line Reduction).

In the attached Sudoku the technique wouldn't help much, but it might on other puzzles. To elaborate; if you check line A, the 6's in A8 and A9, the only 6's in box 3, eliminates the 6 in the purple A4. Moving on to line D, there are 6's in the purple D1 and D4. All the other purple cells are either solved or lacking 6 as a candidate, so logically line D MUST have 6 in either D1 or D4; the 6's in D2 and D9 can be eliminated. This your current version of the solver doesn't do at the moment... Like I said, eliminating those 6's in this puzzle doesn't help much, but in other puzzles it might very well be a solving move...

Just thought you should know, it aught not be impossible to implement. ;)

Thanks for this fantastic solver!

Ivar

Hi Andrew,
I really like the option of being able to put "The Daily Sudoku" into the solver and printing it out with the candidates already in place. However, this option isn't available for the "30 Day Archive" puzzles. Would you consider adding that option to the archive puzzles as well?

Thanks,

Chuck Bruno

Hello Stuart,
may be, this will interest you to develop your wonderful solvers. I tried this puzzle with your Sudoku solver. It shows a 9 in B9 by a Digit Forcing Chain. But it does not find before the off chain AIC, which you have in the same circle by ignoring B9, like it should:
-6(A8)+6(A3)-6(C1)+6(H1)-2(H1)+2(H7)-2(G8)+2(A8)

Using this, you may take 4 and 9 from A8 and 8 and 9 from H1 and the puzzle becomes immediately quite easy.

Andreas

Have you stopped publishing Jigsaw puzzle packs????

Sorry made a big misyake in my previous message few minutes ago. Here it is corrected : Hello! Found something with 2 aspects. While looking for all possible combinations in the small grid I realize some combinations weren't there when the box is L-shape and covering 2 boxes (9-square boxes). Like in no1218 july 25 for the sum of 7 where it show 1,2, 4 with skipping 3,1,3 and 2,3,2 and 1,5,1. The other side of it is when we use only the steps from the solver. In this no 1218, the 4th step make the same error not allowing for those 2 combinations. As I am concern, it is the same logical problem. Despite this, you are doing a great job and I am very happy to rely on your tools to better myself at solving sudokus.

Have you thought about making your solver available as an Android Application (Paid App is fine). I own your book, altho have not read it yet. Your Sudoku Solver would be a great tool to help me learn advanced puzzles in my Motorola XOOM.