The sad local wiggle strategy is a special-use strategy. It's generally only helpful when, using Show Relative Score Coloring, the entire protein appears greenish, except for a small area of red. Like this:

Sad Local Wiggle 1

The score, though you can't see it, is 10246. When you've got a fold that looks like the above, freeze two amino acids around the sad region:

Sad Local Wiggle 2

...then local wiggle it. It does not matter if the score goes down, and Clashes should be disregarded. You'll solve them later. Wait until the local wiggle achieves Stability. Then lock all the parts that were involved in it:

Sad Local Wiggle 3

Next, global wiggle until you're again stable. Unlock everything, and wiggle again. Shake, and you're done:

Sad Local Wiggle 4

It might not look like much, but this approach gained 101 points immediately.

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