Order Matters G50:
Complete a puzzle where the last nine consecutive moves are the numbers 1-9
To effectively get this, follow these steps:
1. Turn on "All Settings".
2. Pick an easy puzzle.
3. Fill in all the numbers until you have one of each number left.
4. Fill in the last 9 numbers in the order of 1 to 9.
Do that and this achievement is added to your collection.