unkx80: This discussion page contained the previous discussions. However note that some of the diagrams have five stones in the black chain, while others have only four stones. Since my copy-editing made most of the discussion obselete, I simply moved all of them here. (2005 August 12)
-- contents of page as of 2005 august 12 (start)--
A Cut Threat Clamp is a clamp which threatens a cut.
is a clamp, and threatens a cut at a, so we can call it a Cut Threat Clamp.
In this case, black falls back at , and with the double hane of , white gets what she wanted.
If was not possible, a would also be good for white.
Alex: I agree that the clamp is correct and the hane wrong for Black, but are you sure the double hane is good for White? I don't think White has much here, except aji to work with if she later invades lower down the left side. As White, I would extend at the point of .
nachtrabe: Clamp is a "recognized" maek--it is in the books--but I have never heard anyone use the phrase "cut threat clamp" (I have heard "clamp that threatens a cut"). Personally I wouldn't mind seeing the content on this page merged in with clamp.
Fujisawa, in the tesuji dictionary?, refers to it as a kosumi-tsuke, noting the necessity of third stone involved in the shape
-- contents of page as of 2005 august 12 (end)--
unkx80: When the Black chain has only four stones, the clamp does not work either. White can turn the entire corner into a ko.