I actually solved this puzzle fairly easily, but I was curious so I put it through SE and it said it had "1 x 3 Strong Links"

I was wondering exactly what that meant. [No need to solve this puzzle, I'm just asking a general question.]

Obviously I used different logic to solve the puzzle than SE did. So I"m not asking about that. Just what "Strong Links" in SE means.

I used a few techniques to solve it. I notice that SE tends to use the easiest techniques it can find, then use as few harder techniques it can find. At the time I was waiting for my car to be washed and detailed, so I wasn't memorizing every technique I might have used. Plus I suck at trying to remember every trick I used when there is more than a single point in the game that makes the rest of the puzzle trivial. There are probably several ways to solve this particular puzzle.

.2.8.9...

..8..2..3

..9.6.84.

69......4

..5.2.9..

8......25

.83.7.4..

1..6..2..

...4.8.1.

+-------------------+-------------------+-------------------+

| 3457 2 1467 | 8 1345 9 | 1567 567 167 |

| 457 14567 8 | 157 145 2 | 1567 5679 3 |

| 357 1357 9 | 1357 6 1357 | 8 4 127 |

+-------------------+-------------------+-------------------+

| 6 9 127 | 1357 1358 1357 | 137 378 4 |

| 347 1347 5 | 137 2 13467 | 9 3678 1678 |

| 8 1347 147 | 1379 1349 13467 | 1367 2 5 |

+-------------------+-------------------+-------------------+

| 259 8 3 | 1259 7 15 | 4 569 69 |

| 1 457 47 | 6 359 35 | 2 35789 789 |

| 2579 567 267 | 4 359 8 | 3567 1 679 |

+-------------------+-------------------+-------------------+

This Sudoku can be solved using the following logical methods:

51 x Hidden Single

1 x Naked Single

6 x Pointing

2 x Claiming

1 x Hidden Pair

2 x Skyscraper

1 x XY-Wing

1 x 3 Strong links (including blocks) 2102 (Using 2 grouped strong links)

The most difficult technique (ER): 3 Strong links (including blocks) 2102 (Using 2 grouped strong links)