## richard&judy

Everything about Sudoku that doesn't fit in one of the other sections

### richard&judy

did anyone else notice that the puzzle on todays programme had two answers or have i missed something
is this unusual as i have not seen this before

Posts: 3
Joined: 04 May 2005

I have no idea what you are talking about, but do you happen to have the starting grid?
Animator

Posts: 469
Joined: 08 April 2005

Guest

Posts: 312
Joined: 25 November 2005

I found that page aswell... but nowhere it says that it is Today's puzzle... anyone knows?
Animator

Posts: 469
Joined: 08 April 2005

Ok, you are right, that seems to be the one... (the mild one)

it does has multiple solutions... now the question is wheter or not that was intended...

Wayne, do you know anything about the puzzles in this show?

I tried solving it myself, and I entered it in one solver, which failed.

The point where it get stuck:

2 7 1 | 4 5 6 | 9 3 8
* 5 6 | * 8 * | 1 4 *
* * 4 | * * 1 | 5 * *
---------------------
5 6 8 | 1 2 9 | 4 7 3
4 1 3 | 6 7 8 | 2 5 9
7 2 9 | 3 4 5 | 6 8 1
---------------------
6 * 2 | * * * | 7 1 5
* * 5 | * 1 * | 3 * *
1 3 7 | 5 6 2 | 8 9 4
Animator

Posts: 469
Joined: 08 April 2005

i kkept going with unique solutions to the folowing position

2 7 1 | 4 5 6 | 9 3 8
9 5 6 | 2 8 3 | 1 4 7
3 8 4 | 7 9 1 | 5 * *
---------------------
5 6 8 | 1 2 9 | 4 7 3
4 1 3 | 6 7 8 | 2 5 9
7 2 9 | 3 4 5 | 6 8 1
---------------------
6 9 2 | 8 3 4 | 7 1 5
8 4 5 | 9 1 7 | 3 * *
1 3 7 | 5 6 2 | 8 9 4

on the tv programme they didnt mention it had multiple solutions
Guest

Posts: 312
Joined: 25 November 2005

That's strange... are you sure you haven't made a guess somewhere?

I used this solver: http://act365.com/sudoku/ (ofcourse with guessing unchecked!) and it stops at the same point as me...

For the record, the other two puzzles on that page are correct...
Animator

Posts: 469
Joined: 08 April 2005

i will recheck from where you got to and let you know
i dont use programs so maybe i have some other logic step they dont use

Posts: 3
Joined: 04 May 2005

I solved the mystery...

I checked my collection of Times's puzzle, and found out that this puzzle is the same as the one published in the Times on 26 April (except for the 3th row).

You can see the puzzle at:[url=http://www.timesonline.co.uk/article/0,,18209-1584981,00.html] http://www.timesonline.co.uk/article/0,,18209-1584981,00.html[/url]

Wayne, can you contact the creators of that show and inform them that you can give them free puzzles? (or maybe contact the Times, informing them that someone is publishing the same puzzle(s)...)
Animator

Posts: 469
Joined: 08 April 2005

i have rechecked and i agree that there are more multiple solutions
i must have mistakenly made an assumption
probably they have misposted the puzzle to the website

Posts: 3
Joined: 04 May 2005

Hello All.

The problem seems to be that whoever did the graphic for the website has missed out two clues which should appear in the 3rd row of the grid. There should be a 3 at the left end and a 6 at the right end.

Copying a puzzle from one place to another often seems to be a greater challenge than the Sudoku puzzle itself!

You can tell that something is missing, if only because the symmetry of the puzzle is destroyed. You need a clue at each extremity of the 3rd row to complete the symmetry.

I was given a heads-up about the "Richard and Judy" program, just a few hours before it aired. For non-UK residents, the "Richard and Judy" program is a popular talk show which airs at 5.00 pm on Channel 4.

One of the guests on the show was Michael Harvey, Features Editor of The Times, so I guess the puzzle was used with The Times' authority, and it was (somewhat circuitously) acknowledged as one of my puzzles.

I'll see if I can get it fixed.

I note also that the "Easy" (Very Easy) puzzle shown at the bottom of the Richard & Judy website page is missing a 9 in r3c3, which is needed in order to make the puzzle symmetrical.

- Wayne
Pappocom

Posts: 599
Joined: 05 March 2005