I had a lot of fun writing this section. The reason is that I just love the logic in these techniques. This is the real "meat" of the game. Some of the techniques are hard to follow at first, and even harder to spot in a puzzle. But with some practice you'll be able to recognize them with a glance.
The first techniques in the list will "do the most damage" - that is, solve the most empty cells - so I recommend going through them in order:
Topics in this section: