## Need some help here :-)

Advanced methods and approaches for solving Sudoku puzzles

### Need some help here :-)

Hi, new guy here

I've really tried coming up with a solution to this one. I'm down to guessing and I don't want to do that. So I would be really grateful if someone could give me a clue, and an explaintion to how he/she found it.

Code: Select all
` *-----------* |3.1|28.|..7| |...|1.7|...| |7.6|934|51.| |---+---+---| |.7.|4.9|18.| |9.8|.21|7.4| |.1.|873|.5.| |---+---+---| |..9|.4.|371| |...|7.2|8.5| |..7|3.8|..6| *-----------* `
Last edited by SarC on Sun Sep 25, 2005 5:27 pm, edited 1 time in total.
SarC

Posts: 13
Joined: 25 September 2005

Look carefully at the entries in column six.
r.e.s.

Posts: 337
Joined: 31 August 2005

r.e.s. wrote:Look carefully at the entries in column six.

Soooorry, made a mistake. I've corrected it now....
SarC

Posts: 13
Joined: 25 September 2005

Hi guys, have been playing Sudoku for a little while but new to the forum. Now that SarC knows what's wrong, can you tell me what's happened in column 6? I can't see anything incorrect, and can't see where it gives clues as to the next step. Thanks.
Shazbot

Posts: 220
Joined: 24 September 2005

shazbot wrote:Hi guys, have been playing Sudoku for a little while but new to the forum. Now that SarC knows what's wrong, can you tell me what's happened in column 6? I can't see anything incorrect, and can't see where it gives clues as to the next step. Thanks.

I made an error in entering the 'text-version' of my puzzle so there was two 8's in a column. So I still need help for a solution to the puzzle :-D
SarC

Posts: 13
Joined: 25 September 2005

shazbot,
SarC's first grid had two 8's in column 6 (he's fixed it now). The next thing to notice would probably be the naked pairs in row 7. There are other naked pairs to look for after that. Look here
http://www.simes.clara.co.uk/programs/sudokutechniques.htm
r.e.s.

Posts: 337
Joined: 31 August 2005

Thanks - I thought I was going crazy - I couldn't see anything wrong with it! And thanks for the link too - I'm going to put that to good use. Have been scratching my head at some of the terminology (I thought XWing was a Star Wars thing....) and dreaming about the day when it will all be a part of my normal vocabulary!
Shazbot

Posts: 220
Joined: 24 September 2005

shazbot wrote:Thanks - I thought I was going crazy - I couldn't see anything wrong with it! And thanks for the link too - I'm going to put that to good use. Have been scratching my head at some of the terminology (I thought XWing was a Star Wars thing....) and dreaming about the day when it will all be a part of my normal vocabulary!

It IS a StarWars thing - I may be wrong but I believe the 'swordfish' technique was named after the wing configuration of the old Fairy Swordfish biplane - used in Malta in WW2 and elsewhere, because the placing of the nodes in the pattern resembles the wing-wire structure of the plane. It's reasonable to assume that the x-wing name has similar airborne origins. DeHavilland Turbot doesn't quite fit with this does it?

As I said ... I may be wrong and I'm sure tso will put me right.

stuartn
stuartn

Posts: 211
Joined: 18 June 2005