## Stumped...

Advanced methods and approaches for solving Sudoku puzzles

### Stumped...

I know this is probably obvious to someone, but I'm stumped. Been looking at this for the last half-hour and can't find any more candidates to eliminate.

My Grid:

Code: Select all
`   |  8|9  7  |   | 8498|632|157-----------  9|18 |54224 |   |891851|294|   -----------124|857|369   |   | 18986|3 1|  5`

Any help? I have entered all the possible entries in each block, but nothing's jumping out at me...
Thanks!
Alex (reader of the Winnipeg Free Press)
AlexK

Posts: 8
Joined: 04 September 2005

### Re: Stumped...

AlexK wrote:I know this is probably obvious to someone, but I'm stumped. Been looking at this for the last half-hour and can't find any more candidates to eliminate.

My Grid:

Code: Select all
`   |  8|9  7  |   | 8498|632|157-----------  9|18 |54224 |   |891851|294|   -----------124|857|369   |   | 18986|3 1|  5`

Any help? I have entered all the possible entries in each block, but nothing's jumping out at me...
Thanks!
Alex (reader of the Winnipeg Free Press)

"X-wing" in the 7's:

R1C4,R1C5
R5C4,R5C5

.'. R5C3 can't be a 7...

(actually, you don't even need an X-wing. The fact that 7 must be in the middle row of the middle block is sufficient.)
whohe

Posts: 32
Joined: 28 May 2005

Or, just look at where the 7 can be in row 4.
PaulIQ164

Posts: 533
Joined: 16 July 2005

Thanks muchly.
Back to work!

Edit: That was all I needed to finish! Thanks!
AlexK

Posts: 8
Joined: 04 September 2005