Note, if you know or can invent the names of the tesuji, move diagrams to new pages. (this has been done now for all but the last example --Dieter)
Uberdude: I'd say this is an example of shortage of liberties (Damezumari), though perhaps there is a more specific name for this type on the edge.
Looks to me like a watari. ~srn347
Something from the endgame. Beginner's level.
Jared Beck: The same tesuji, also common with beginners. I wish I still got to play simple tesuji like this. My opponents don't make such mistakes anymore!
Rather than calling this move a tesuji, however, I think makes more sense to call Black 2 "Anti-suji" This paradigm of learning the wrong move is more helpful to beginners than the paradigm of learning the response to the wrong move.
I borrow the term "Anti-suji" from Sakata Eio's book "Tesuji and Anti-suji of Go"
Bill: How about cut-back?
Guest: As a begineer I'd really appreciate some clues as to a good response to this.
Bill: Play at 3.
This happens sometimes even at IGS 5k* level. But in most games it is never played and remains a hidden threat that limits opponent's freedom of choice.
If you look at it this really is just a ladder that turns around a stone. You can call it a "Ladder" so it really isn't nameless.
Both of these tesuji work by making the opponent choose between answering an attachment (which is usually good) or protecting or taking advantage of a move nearby. Either way, you get something. I find this idea rather interesting, but don't know what they are called.
tderz: That example is either in GalacticGo (Vol. 1) or in "Whole board Tesujis". I will check whether they gave it a name there.
Slarty: Yes it's interesting, although an idea instead of a local pattern. Perhaps "creating a (second) good followup," "tenuki probe" or "contact with miai followup." Playing two local moves in a row: "time travel"