Help for a noob

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

Help for a noob

Postby jim.ryan.63 » Sat Jul 06, 2019 7:14 pm

Can anyone please help me (a newbie here) understand how to solve the following partially completed puzzle? Thanks!
*-----------*
|892|576|413|
|467|321|985|
|531|984|276|
|---+---+---|
|973|6.2|85.|
|658|.3.|..2|
|124|85.|63.|
|---+---+---|
|..5|268|...|
|2.9|7.3|568|
|.86|.95|.2.|
*-----------*
jim.ryan.63
 
Posts: 1
Joined: 06 July 2019

Re: Help for a noob

Postby SpAce » Tue Jul 09, 2019 11:41 pm

jim.ryan.63 wrote:Can anyone please help me (a newbie here) understand how to solve the following partially completed puzzle? Thanks

Hi Jim. That's actually a very nice puzzle state because it has lots of solving patterns available. The first thing I saw (immediately) was this Remote Pair:

Code: Select all
.-----------.--------------.----------------.
| 8   9   2 |  5    7   6  | 4    1    3    |
| 4   6   7 |  3    2   1  | 9    8    5    |
| 5   3   1 |  9    8   4  | 2    7    6    |
:-----------+--------------+----------------:
| 9   7   3 |  6   *14  2  | 8    5   *14   |
| 6   5   8 | *14   3   79 | 17   49   2    |
| 1   2   4 |  8    5   79 | 6    3    79   |
:-----------+--------------+----------------:
| 37  14  5 |  2    6   8  | 137  49   1479 |
| 2   14  9 |  7    14  3  | 5    6    8    |
| 37  8   6 | *14   9   5  | 137  2    7-14 |
'-----------'--------------'----------------'

Look at those four starred (14) pairs. They form a double-chain which must have 1 at one end and 4 at the other, which means neither is possible in r9c9. That leaves 7 as a single, which solves the puzzle.

This is also solvable with many other simple (but non-basic) techniques, such as Skyscrapers, Kites, W-Wings, Unique Rectangles, etc.

PS. These kinds of questions actually belong to the "Help with puzzles and solving techniques" section.
User avatar
SpAce
 
Posts: 1571
Joined: 22 May 2017


Return to Help with puzzles and solving techniques