Using the two point jump to sacrifice
Dieter: I will try to find an example from pro play or anyone who finds one, please substitute this crafted setting with such a pro example. For now, this will do: is under pressure.
, a one point jump is the basic move for defense. However, in this position it may be too heavy. White exhanges
for
and stays ahead of Black's stones with
and
, while these face white thickness below.
If we interchange -
in the previous diagram: White not only cuts off a stone, but more importantly
and
are harmed by
and
.
Instead, here will treat
lightly and suffice with reducing the size of White's sphere of influence. It is more difficult to attack this structure on a large scale. If White cuts off with
and
, the black stones are unharmed.
Here we say the two point jump at work again. For black, jumping as far as a is dangerous, so he refrains to . Cutting at b would give White all options for sacrificing
in good shape.