Thanks 9X9!
And I should add that I would very much like to do
a hard puzzle without pencilmarks, so I will keep
practicing and trying to think of potential strategies. A solution
without pencilmarks just looks so nice (as you suggest).
I just wonder how I'll be able to spot, say, a naked quad
or an X-Wing. Maybe the key is to see these same patterns in
a different way?
Getting back to the thread topic: thanks for your fine
description of TS. It sounds very enjoyable.