## Newbie needs help with puzzle

Advanced methods and approaches for solving Sudoku puzzles

### Newbie needs help with puzzle

I've been doing Sudoke for about 2 months. I need some help with the following puzzle. The puzzle is "Hard", using Pappocom's Wayne Gould puzzle.

I would like a "minimum clue", in other words a clue that reveals the least amount of information.

{1},{5689},{4},{3569},{2},{359},{38},{7},{69}
{69},{3},{2},{4},{8},{7},{1},{69},{5}
{689},{7},{568},{13569},{36},{1359},{38},{4},{2}
{368},{2},{3568},{1356},{7},{1358},{9},{168},{4}
{36789},{5689},{35678},{1356},{346},{13458},{2},{168},{136}
{4},{68},{1},{236},{9},{238},{7},{5},{36}
{5},{168},{3678},{379},{34},{349},{46},{2},{19}
{2},{4},{9},{8},{1},{6},{5},{3},{7}
{367},{16},{367},{2379},{5},{2349},{46},{19},{8}

Regards,
Alan
alan

Posts: 5
Joined: 16 August 2005

okley dokley, a naked pair in column 7, and a hidden pair in column 2. Then a placement in row 1.

S

Code: Select all
`1.4.2..7. .324871.5 .7.....42 .2..7.9.4 ......2.. 4.1.9.75.5......2. 249816537 ....5...8 `
simes

Posts: 324
Joined: 11 March 2005
Location: UK

There is a Naked Triple in Column 2.

Edit: Beaten. Although I like thinking of it as a Naked Triple rather than a Hidden Pair.
Xenon

Posts: 6
Joined: 15 August 2005

Simes,

I can see two Naked Pairs in column 7: {3,8}, {3,8} and {4,6},{4,6}

However, since there are no other candidates in column 7, then I don't see how that helps.

Now that you direct my attention to column 2, I can see the Naked Triple. I wasn't previously aware that a Naked Triple could contain a Hidden Pair (Xenon), so this is new knowledge for me.

What is a "placement"? I don't see that mentioned in:

http://www.simes.clara.co.uk/programs/sudokutechniques.htm

Regards,
Alan
alan

Posts: 5
Joined: 16 August 2005

On further reflection, I see the Naked Triple in column 2, but I don't see a Hidden Pair. What is the pair?

Regards,
Alan
alan

Posts: 5
Joined: 16 August 2005

Sorry, I see you'd already found the pair 46 in column 7.

The hidden pair is 5 and 9.

A placement is simply putting in a "big number" as opposed to a pencil mark.

S
simes

Posts: 324
Joined: 11 March 2005
Location: UK

alan wrote:What is the pair?

{59}

Edit: Beaten again. ;)
Xenon

Posts: 6
Joined: 15 August 2005

All solved! Thanks to Simes and Xenon.

Regards,
Alan
alan

Posts: 5
Joined: 16 August 2005

Wow. That was exhilarating.
Karyobin

Posts: 396
Joined: 18 June 2005

My sentiments exactly!
alan

Posts: 5
Joined: 16 August 2005