The Future of Go Summit: AlphaGo & Ke Jie match 2 moves analysis

Key Takeaways

hello from the future of go Summit in vuan I'm Toro grael research scientist at Deep Mind I'm here with Michael Redmond Nan professional hello happy to be here Michael that was a pretty exciting game very exciting so what happened there in the top right corner when it All Began yes well this peep that uh C played um was a bit unusual in that the usual move would be somewhere on the third line and so white came all the way here and if black just simply answers it this will be a profitable exchange for white and so uh although it looks a bit dangerous for white it's actually a challenge uh to alphago to start a more complicated sequence here right did alphao accept that CH and of course yes alphao did accept and at this point it's it looks difficult for black to capture these two stones um but actually alphago found a very very elegant way to sort of s side step that um instead of playing the normal move which would be this one or this one um actually this jump here was a move that was hard for a human player to find but actually it was very efficient in that if white um white actually pushed through here and after playing this exchange alphao could extend here and because of the fact that this Atari is forcing white cannot actually break through here right and so locally if white is to play here then black will be able to squeeze from this side and get a complete squeeze um using all of these moves as forcing moves to build a strong position here and would still have another squeeze on this side too so it's a very elegant sequence for black um and a sequence where c um challenged alago to a complicated situation and alphago um responded with this elegant move and actually at this point uh C decided that uh there was no profit in continuing locally and so they switched to another part of the board so this first exchange here was very interesting that beautiful so a little later in the game we saw another exciting Turning Point what happened Michael well um I'd like to compare this with the first game which was relatively um simple and straightforward whereas in this game like in the upper side uh C made a kind of a challenge uh to a complicated situation and alphago very elegantly um avoided a well settled that shape with this jump here move 25 and so that was a very elegant solution to the problem there uh and again on the lower side now we have a game that is becoming more and more complicated as qu creates a situation on the left side also in which there unsettled groups and now on the Lower Side um he uh C played a a move that is quite different from the move that I would have chosen so first I'll will show you that qu played here which actually created an extremely complicated situation um but I'll show you also the move that I would have chosen which is this one which locally it doesn't actually it would be perfect if it could actually capture the black group it doesn't work that well locally uh because white does have to uh move back here uh to protect the weakness here so white will play here and then black can play this and this will capture these stones but there's still a lot of bad ay in the corner there so when white protects here in order to call this a black territory black actually needs another move somewhere around here right in which case white will have the initiative to maybe move to the upper side of the board or any other part of the board that white chooses to and so looking at the overall position here this is actually looks uh satisfying for white and so this is a real uh possibility that crot had he could have taken this choice right but he chose a different way he chose a different way I think that uh signifies that uh in this game Cate sort of had a theme that he wanted to create as complicated a situation as possible just to test the ability of alpha go to handle such complicated situations so in the game qu plays here right and the immediate meaning of this move is that is trying to make uh pushing through here even more effective than it was um when I showed you so uh black cannot really afford to answer that locally but will push through here and allow white to take a local profit here so this corner is uh there's still some ways that it can uh black can cause problems there but locally it looks like White's going to get some territory in that corner in return it's very natural that black will be taking the offensive here in the center of the board um and taking defensive against these white stones and so at this point of the game um actually it continued this way the game becomes very very complicated in which there um unsettled groups like there's two here there's two on the left side and the black group is not settled yet and this corner it became a very complicated position uh which is called a CO and so there's at some point in the game the upper side also became uh complicated so we had something like eight groups uh of which the life or death was not settled and so this is much more complicated than you even find in a pro proo human game it's um usually you have a maximum of about four unsettled groups in this game there were about eight which made it a very good test of Al skill to handle such a complicated situation fascinating thank you very much Michael thank you