3-4 point high approach large low extension
Difficulty: Expert Keywords: Joseki
This was really not seen as joseki, until very recent times. Now some variations are being worked out, just over the last couple of years.
After ,
at a has been tried too. After
Black may play tenuki: but at b for strong shape of course natural too. The question will be what use Black can make of the solidly-supported low stone
.
Another way to play is here, for influence. After
Black probably connects at a, allowing White to extend on the top side.