The Future of Go Summit: Pair Go moves analysis

Key Takeaways

hello from the future of go Summit in vuan China I'm Tor grapel research scientist at Deep Mind I'm joined here by hajin Lee a former forun professional player hello so we had a very special format today for the first game can you tell us about that yes the first game was Parago format where two human players each of them teamed up with alphaco and then they really had to work as a team but they were not allowed to discuss with each other oh fascinating and how did that work out so it was really interesting to see how the human players were like trying to adjust to the alphago style and in that process I believe the players learned a lot of different things oh fascinating so uh let's look at an early position what happened here in the top right corner that's right so in this game when black came over here we all expected white to push over here because the normal sequence and black would extend white would jump but then this ji over here wouldn't really coordinate with this part because when black pushes white need to answer this way and black can even push it more and with this shape this white would be somewhat over concentrated so when black comes over here this result would be FL uh favorable for black right so uh White uh played a different move then right that's right so at this point it was alha Go's turn in White's team and ala go to this one space jump which is often considered um bad move that's because when black pushes here and then presses white has to come out and then when black Cuts this is a Mii situation where white has to give up either this two stones or this one stone right but in this particular situation it worked out remarkably well can you show us how yes that's right so this situation was special because after black captur this one stone this Black's um good influence was somehow reduced by this White's position already and also because this was leather white could get two moves around here so when white came over here if black Ed the then white could save this one stone right so that's why black had to come over here and we can see that still these white stones are somehow limiting the black's influence toward this area and then white could come over here and make a second attack yeah that's right fascinating yes thank you okay so here a little later in the same game um another interesting situation arose can you explain what happened that's right so after black came over here white plate here and this move over here is looking at Black's weakness so if black answered here to reinforce this weakness white would extend here making a good shape in the side but it is somewhat unavoidable for black because this um attach over here would be too severe yes in the actual game black played here which was uh amazing timing in my opinion because often times when you see this Invasion white needs to let this black connect to the corner in order to keep this white shape but if white did that in this situation by connecting to the corner black would this Black's weakness over here would be naturally weakened so for example after this one because the corner is already quite safe when white needs to come out over here to secure this group black could choose this one and then this one wouldn't have much meaning for white so white would have to choose a different variation here that's right so that's why white didn't want to let black connect to this corner in the actual game white exchanged this attach and then H it so that if black blocked here white would block this one and then when black Ataris instead of connecting here white would choose this cut and after this black can save this group right but there is still this weakness and then also white can have a better shape in the center so this was White's plan to to like this right but that's also not what happened then that's right yes and because White had this plan instead of blocking this corner black chose to come out here and then white exchange it this one if black blocked here then it would become the same sequence right but black connected here and then white Tar this one So eventually it became a big exchange where white got this corner and then black got the outside so HED here connect it would have been nice if white could come out here but then the capturing race between the corner and the outside would have been some difficult for white right yes so like this it would have been not possible for white so white had to come back to the corner here and then black blocked White had to connect and then black blocked and then black blocked here at the post game press conference fui told us that IO thought this result was good for black right yes because although white got the whole Corner Black's outside was really good and also black got sente and this one was sent so white had to take this one and then with here right and so white got the corner territory but black ended up with a lot of strength on the outside that's right yes thank you so later in the game there was an interesting development here on the lower left can you explain what happened that's right so after black built this influence came into here to attack these two stones and then we all thought this was a good move right but at the press conference fanu told us that actually Alpo was expecting this move and the merits of this move would be yes and this move is very difficult to think because first of all it's very high on the fifth line and also when you think about um chasing these two stones somehow eliminating the eye space is the first intuition you have but this move is um globally looking at all this um blacks influence the whole board and somehow because of this uh sent moves white cannot come outside so even if white could live inside black would be able to build a huge moo in the center and that would give blacks big Advantage so that was much better move than this Invasion and when Gully saw this move for the first time he said that he wouldn't have thought about this move once he saw it he thought it was quite impressive yeah it's very good to see that professionals can learn from alphao that's right yes great thank you thank you