## 6th Expert level, stuck after using x-wing once

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

### 6th Expert level, stuck after using x-wing once

Hi, i simply cannot figure out how to complete this puzzle. Looked up some of the advanced techniques and managed to get x-wing to cross a few 5's out, but now i'm stuck again. Please help!
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Dutchnesss

Posts: 1
Joined: 25 February 2020

### Re: 6th Expert level, stuck after using x-wing once

Hi,
Dutchnesss wrote:Hi, i simply cannot figure out how to complete this puzzle. Looked up some of the advanced techniques and managed to get x-wing to cross a few 5's out, but now i'm stuck again. Please help!

You could simplify the puzzle a little more by noticing the triple 147c4 and the quad 1578r2 which eliminates 7r2c9, and the puzzle ends with the singles.
Cordially
Robert
Mauriès Robert

Posts: 343
Joined: 07 November 2019
Location: France

### Re: 6th Expert level, stuck after using x-wing once

Code: Select all
`*-------------------------------------------------*| 9  125    7    | 1346  8     1245 | 345 35 3456 || 4 *158   *58   | 367-1 7-1  *15   | 9   2  367  || 3  25     6    | 47    247   9    | 8   1  457  ||----------------+------------------+-------------|| 8  34     234  | 147   1247  6    | 135 35 9    || 5  7      234  | 14    9     124  | 13  6  8    || 6  9      1    | 8     5     3    | 7   4  2    ||----------------+------------------+-------------|| 7  3468   348  | 5     1346  148  | 2   9  134  || 2  34568  3458 | 9     1346  148  | 345 7  1345 || 1  345    9    | 2     34    7    | 6   8  345  |*-------------------------------------------------*`

Another way is to note the naked triple (158) in the cells marked * which removes some 1's from Row2. r2c5 is then 7 and the puzzle solves with singles from there,

Leren
Leren

Posts: 3927
Joined: 03 June 2012

### Re: 6th Expert level, stuck after using x-wing once

Look, where 3 and 6 are (*-ed cells)
Code: Select all
` +-------+-------+-------+ | 9 . 7 | # 8 . | . . . | | 4 . . | # . . | 9 2 # | |*3 .*6 | . . 9 | 8 1 . | +-------+-------+-------+ | 8 . . | . .*6 | . . 9 | | 5 7 . | . 9 . | . 6 8 | | 6 9 1 | 8 5*3 | 7 4 2 | +-------+-------+-------+ | 7 . . | 5 ^ . | 2 9 . | | 2 . . | 9 ^ . | . 7 . | | 1 . 9 | 2 ^ 7 | 6 8 . | +-------+-------+-------+`

In column 4 both 36 only can be in rows 12 (hidden pair).
Moreover in row 2 they cannot be in columns 236, and column 5 (because in box 8 3 and 6 must be in column 5). So you have another hidden pair 36 in r2c49.