joseki moves discarded by AI
The AI revolution has brought about new insights in especially the opening, as documented at Leela Zeros opening gospel or openings reviewed with AI. Some former joseki moves have received such low marks by AI that they have since been discarded by (most?) professionals.
Later, White can exploit the aji in this position by dropping down at a leaving all marked points as possible escape routes. This unsettles the Black group.
Instead of in the first diagram, AI wants Black to connect under at here. This leaves aji, in terms of the cutting point at a but this latent vulnerability seems less severe than the one in the previous diagram.
As a consequence, pros and strong amateurs usually don't play the connection but have adapted to cross under.
However, the side is quite large and so b will soon become a big move for both.
AI favor here instead. Black now has an open skirt. Defending against it is gote. Not defending against it leaves Black vulnerable to an invasion which doesn't so much scoop out his potential territory as it unsettles the wall.
White's territory is bigger too than in previous diagram. Even if Black may take sente now, these advantages seem enough for AI to discard the traditional joseki.
Instead AI want to attach at here. This diagram shows one of the variations for , which can also be played at or . In this variation, Black may take sente but this leaves a big corner capture at a. If Black defends at b, White will take sente
In general, AI play 3-3 invasions earlier than what was customary, leaving out the turn that makes Black thick. Also, pincers and early side plays have fallen out of grace, in favor of corner reinforcements, as is mentioned in Leela Zeros opening gospel.