Anti-bulge
Anti-bulge is a term coined by Bill Spight for a play that prevents a bulge by taking the apex of the potential bulge formation. The anti-bulge is a combination of a stretch and a peek.
The anti-bulge, , is big. If Black plays the bulge White's stones become very weak. Also,
threatens the push through at a.
Gresil: I ran into a little idea of another kind that you might also call an anti-bulge:
, a pre-emptive peep at a tiger's mouth, undermines black's bulge sequence.
togo: This example does not really fit the bill: bulge and tiger mouth are only minor considerations here, shuts Black's group off from the center and is a frame play. Indeed the bulge, if played, would be fully operational and could be used for the creation of an eye or, with a change in the surrounding stones, a cut.