3-5 point 3-3 approach
here is an alternative to the common approach at b. It can have a strategic meaning, for example to avoid being pressed into a low position (White a, Black b).
The normal answer is - see 4-5 point 3-3 approach for that. Other plays are less frequent: a, b and c are known from pro games.
For example, is more common in pro games than Black at a. The low stone
can cause Black to dislike being pressed down.
Black's idea is to play tenuki after here. White at a now makes thickness facing
.
For White ignoring the cover play by Black, see 3-5 point 3-3 approach cover, tenuki.
I think cutting will work for Black if the ladder doesn't work for White.
3-3 invasion from Yi-Yi game
is fine technique to create shortage of liberties.
and
concentrate on the two upper white stones.
instead of a avoids strengthening White.
and
focus on stabilizing this group and take the initiative.
switches to the top, establishing a connection between his influential group and his corner stone.
Other variations
Is it wrong for white to respond here with 2?
Bob McGuigan: is possible, I guess, but it follows the low 3-3 point move with an even lower second line move. Seems like Black will build some impressive outside strength. This may be OK for White if there is a strong White position on the left side.