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

I'm getting quite good at medium puzzle. Have attempted this hard one. Got stuck, and was given a hint for a 7, but have no idea how to find this next move. Can anyone please help

-3- -54 -68
--8 16- 5--
5-- 283 -7-

-7- 4-- --5
--9 --5 7--
1-- -76 -4-

-9- 532 --7
--- --8 3--
38- 64- -5-

Hint is highlighted in red.
cat

Posts: 4
Joined: 07 July 2005

### Bottom right corner...

I think this is what Angus calls a "naked triple" ...

The three cells (r8,c8), (r9,c9) and (r9,c7) all have only 1,2 and 9 for their three candidates.

So these three cells, jointly, must contain 1,2 and 9.

But this means that no other cells in the bottom right block can contain any of 1, 2 or 9...

So look at (r7,c8)...

Cheers

Gordon
gfroyle

Posts: 214
Joined: 21 June 2005

Thanks Gordon , will now go away and try and work it out!
cat

Posts: 4
Joined: 07 July 2005

help ou au secour (si il y en a ici qui parle français ....)

voila j'ai cette grille -->
a droite (->) la solution avec les chiffres que j'ai et ceux deja donné
(en vert ceux deja donné et en brun ce que j'ai trouver)

mais la je suis bloqué je trouve rien HELP !!!!

Posts: 4
Joined: 09 July 2005

hey ! i'm exist !

who the next number ? (and why ...)
that's my one question !

thank's you

Posts: 4
Joined: 09 July 2005

(9, 4) = 1

It's the only candidate.
Last edited by simes on Sun Dec 11, 2011 9:41 am, edited 1 time in total.
simes

Posts: 324
Joined: 11 March 2005
Location: UK

who ligne ? -->

Posts: 4
Joined: 09 July 2005

who ligne?

(Line 9, column 4) = 1
Last edited by simes on Sun Dec 11, 2011 9:41 am, edited 1 time in total.
simes

Posts: 324
Joined: 11 March 2005
Location: UK

ok

thank you