4-4 point low approach attach
Keywords: Joseki
at:
a hane: black can block (see variation), extend (see variation) or cut (see variation)
b, the wedge (see variation) requires a favourable ladder.
c invade (see variation)
Not joseki:
- d is not joseki, see BQM 97.
- e the stretch &peep isn't normally good either (see variation)
- moves like f, g and h do not put enough pressure on the attaching stone and allow Black to make a perfect tiger mouth. Move d has the same flaw but uses the abandoned stone to make instant stability;