## help here

Post the puzzle or solving technique that's causing you trouble and someone will help

### help here

Code: Select all
` 4 6 . | . . 7 | 1 . 9 9 1 . | 6 5 4 | . 7 3 7 . 3 | . 9 1 | 4 . 6-------+-------+------ . 4 1 | 9 . 5 | 7 6 . . 7 6 | 1 8 . | 9 4 5 . 9 . | 4 7 6 | 3 . 1-------+-------+------ 1 . 9 | 7 6 . | 5 3 4 . 3 7 | . 4 9 | 6 1 . 6 . 4 | . 1 . | . 9 7 4   6   258 | 238 23  7   | 1   258 9   9   1   28  | 6   5   4   | 28  7   3   7   258 3   | 28  9   1   | 4   258 6  -------------+-------------+------------- 238 4   1   | 9   23  5   | 7   6   28  23  7   6   | 1   8   23  | 9   4   5   258 9   258 | 4   7   6   | 3   28  1  -------------+-------------+------------- 1   28  9   | 7   6   28  | 5   3   4   258 3   7   | 25  4   9   | 6   1   28  6   258 4   | 235 1   238 | 28  9   7  `

Any suggestion on how to procede??
Kent

Posts: 98
Joined: 28 February 2006

### Re: help here

Kent wrote:Any suggestion on how to proceed??

There is an x-wing in r48c19. The 8s in rows 4 and 8 can only be placed in cols 1 and 9. Therefore, no 8s can be placed anywhere else in those cols.

After that, coloring a single conjugate chain of 2s yields another elimination.
ronk
2012 Supporter

Posts: 4764
Joined: 02 November 2005
Location: Southeastern USA

remote pairs on 28:

(r2c3)-(r2c7)-(r9c7)-(r8c9)-(r4c9)-(r6c8)

eliminates the 2 and the 8 in r6c3

It's all singles from there.
Sped

Posts: 126
Joined: 26 March 2006

In box 8, box-line interaction removes candidate 8's from column 4, which opens things up for colouring on 8. One more step than Sped's method but solves it just the same.

Tracy
TKiel

Posts: 209
Joined: 05 January 2006

You don't often get a puzzle like this where you can colour 2 numbers - 2 and 8 - simultaneously.
emm

Posts: 987
Joined: 02 July 2005

emm wrote:You don't often get a puzzle like this where you can colour 2 numbers - 2 and 8 - simultaneously.

In this example I first spotted it as an XY chain, since I like to look for those. Then I realized it worked both ways.. with 2s on the ends and with 8s on the ends.

Remote pairs!
Sped

Posts: 126
Joined: 26 March 2006