## Problem with ALS-XZ

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

### Problem with ALS-XZ

Code: Select all
`*------------------------------------------------------------* | 12    78    9     | 1278  237   4     | 578z  6     3578s | | 4     6     78    | 5     379   789   | 1     2     378r  | | 12    3     5     | 6     127   178p  | 4     78q   9     | |-------------------+-------------------+-------------------| | 5     789   4     | 179   6     179   | 2     3     78    | | 6     789   78    | 3     4     2     | 789   5     1     | | 3     1     2     | 79    8     5     | 6     79    4     | |-------------------+-------------------+-------------------| | 7     4     3     | 289   259   6     | 589e  1     258z  | | 89    2     1     | 789   579   3     | 5789d 4     6     | | 89    5     6     | 4     1279  1789a | 3     789b  278c  | *-----------------------------------------------------------*`

First ALS: a,b,c,d,e Five cells with six numbers 178925
Second ALS: p,q,r,s Four cells with five numbers 17835
The common restricted is (1) in p and a
The 5's in d and e point to the 5 in both z's
as does the 5 in s
What is wrong in what I have done? Neither of the 5's in the z's can be excluded. I thought I had this pretty well mastered...guess not.
Any and all help is appreciated.
Glenn100

Posts: 4
Joined: 29 October 2013

### Re: Problem with ALS-XZ

All of the members of an ALS have to be in the same house, and this is not the case with either abcde or pqrs
Phil
pjb
2014 Supporter

Posts: 1720
Joined: 11 September 2011
Location: Sydney, Australia

### Re: Problem with ALS-XZ

Thanks Phil. I WILL remember this. I have spent several hours pondering about this puzzle but never gave consideration to the fact that they all had to be in the same house. I was under the impression that as long as each cell joined another cell in the ALS regardless of the house it was in, I was OK. Suprisingly, my way worked in almost all cases but, of course, it has to be the correct way 100% of the time. Glenn
Glenn100

Posts: 4
Joined: 29 October 2013