(;CA[utf-8]FF[4]RU[Chinese]ST[2]MU[1]C[AlphaGo vs AlphaGo Game 5; commentary by Michael Redmond 9P
Editing/transcription by Chris Garlock and Myron Souris

In the opening this game looks very AI-like to me, in that I think the order of moves is not consistent. In the middle game Black controls the center of the board. Our reading skills are tested as Black invades White's moyo, and then White lives with three weak groups inside Black's sphere of influence. Unlike in other games we've seen so far in this series, the middle game fights are one at a time instead of all over the place, like in Game 2, for example. It's more organized, you might say, so in that way, it's easier for me to explain what's going on. The game winds up with a very nice endgame, in fact I think it's a beautiful endgame. ]
AP[SmartGo:3.0.1]SZ[19]GM[1]GN[2017.08.28_AlphaGo-AlphaGo_Game 05 annotated-draft version]
EV[AlphaGo-AlphaGo]RO[Game 5]PB[AlphaGo]PW[AlphaGo]KM[7.5]RE[B+Resign]AN[Michael Redmond 9P]
MULTIGOGM[1]
;B[pd];W[cd];B[pp];W[dq];B[ed];W[ec];B[fc];W[dc];B[fd]C[AlphaGo is avoiding complicated josekis; it has the josekis that it "likes," by which I suppose it just means they give it a good winning percentage. This is one of its favorite joseki.  ]
;W[cf]C[This is a position in which most human pros would play an extension on the upper side, but I have not seen AlphaGo play that move (see var). ]
(;B[co]TR[fc][ed]LB[jd:A][pj:B]C[The flow of this game is very strange in the beginning. When Black has the marked group looking like a wall facing to the right, it seems natural for Black to play a move on the upper or right side to start a moyo, and this kakari seems premature in this position. 

Not only does AlphaGo not play the "natural" move at A, it's not even playing on the right (i.e. correct) side of the board. Even if Black doesn't play at A, I would expect a play at B or something on the right hand side of the board because that's the direction Black's stones are pointing. 

So black 11, since it doesn't make direct use of the marked stones, looks strange to me. But, thinking about it, one is reminded that the proverb says that a kakari comes first, after taking the corner in the opening. So it's the kind of move one can expect from AlphaGo; it's a big opening move. But I'm not crazy about it because it's in a part of the part that's not a high priority. So it looks small to me. ]
(;W[qn]LB[jd:A]C[With White. I would want to invade on the upper side at A (see var). ]
;B[mc]C[Playing at 13 is one way Black can protect the upper side, and would have seemed natural if Black had played here with 11. However, playing here after the exchange of 11 and 12 seems to be a change of plan and the flow of moves here is very strange. If Black is going to play here I would have played there from the beginning, instead of the kakari in the lower left. Frankly, it seems sort of schizophrenic; it doesn't make sense to me. ]
;W[ld]C[I'm expecting White to play a double kakari against the Black stone in the lower right but of course White doesn't do that, opting for the shoulder hit at 14 instead. ]
;B[md];W[lf];B[nq]C[After this, despite the strange order of moves, the game is starting to look almost completely normal. ]
;W[cp];B[do];W[fq]C[Human pros will play 18 and 20 with White when the left side is not important. White's strong group in the UL corner reduces the value of the left side, so I can agree with White's play here. With Black, I would now want to play on the right side (see var). ]
(;B[me];W[pj]C[After White 22, the position is starting to look like a normal fuseki, with joseki in three corners, and fighting to be expected on the upper or left side. ]
;B[qh]C[Black plays the double-extension, which you're not supposed to do from a star point, but it's sort of working in this position, because even though there's a weakness at the 3-3 point, this move is more about attacking White on the right side, as Black builds a framework to attack White on the upper side, as well. ]
;W[dk]C[White finally plays the pincer! But while White starts to attack on the left, Black should consider the entire board position (see var). ]
(;B[fg]LB[jd:A]C[Black 25 is an important point that increases Black's potential on the upper side and reduces White's left side. AlphaGo plays these kinds of moves fairly early in all these games, so it clearly considers this to be a very big move. An extension towards the side, at, say, A, would not be very satisfying, taking White on a small scale. In fact, a lot of Black's plays here are aimed at making the upper side important on a large scale. White's trying to start something in the lower left and Black doesn't want to be pushed around here. ]
;W[go];B[qk]C[A fight on the right will favor Black (see var). All of Black's plays here are really focussed on attacking the upper side.  ]
(;W[mp]C[So White instead plays a very AI move, just plays away. You might think White is ignoring Black's attack, but really it's just playing very lightly and de-emphasizing the right side and I agree with this strategy. By refusing to fight on the right side, it's going to make the invasion at the 3-3 in both the upper right and lower right corners very effective moves. Plus, White is getting something back on the left-hand side of the board.  ]
;B[mq];W[kp];B[pk];W[fl]C[Leaving the right side to Black, White takes the offensive on the left. White still has potential invasions in the UR or LR corners. There's also still room for Black to live on the left, which will come up later. The fact that AlphaGo handles each of these fights one at a time makes it easier for me to comment on the game. ]
;B[ig]C[Black 33 is a move I love. I really like the moves that AlphaGo makes towards the center of the board. This is a move that would not occur to me, but after Black plays here, it is clear that the upper side is now more urgent than the left side (see var). ]
(;W[le]LB[lh:A][li:B][jf:C][lc:D]C[If White were to play elsewhere, for example, a Black follow-up move at A would be surrounding right-hand territory on a large scale, something like 80 points, even allowing for a 3-3 invasion. 

Locally, by the way, W34 looks heavy and a bit worrying, and one might expect something lighter, like B or C, but the White descent at D is actually quite effective and I have the feeling that White should be able to make a life. If so, White will have succeeded in erasing a lot of Black territory in the process. ]
;B[dd]C[This is a move you see sometimes, it's something of a probe, to see if White going to connect on the 3-3 or try something else. ]
;W[lc]C[White covers at 36, making miai of the upper side and center, and White's group on the upper side is safe for now. ]
;B[cc];W[cb];B[bc];W[bb]LB[dd:A]C[Black can now wedge to reduce the left side (see var). It's hard to judge but maybe the probe at A shouldn't have been played, as it turns out that it wasn't forcing. It's a question in my mind, I haven't really solved that one yet. ]
(;B[ng]C[This is a really good move; Black attacks while expanding the right side. ]
;W[bd];B[id]C[Black 43 makes a living shape for Black and takes away White's base to chase the White group out. ]
;W[jh]C[At this point, White is out into the center, and Black has gained something on the right, and the Black group in the upper center is strong enough that Black can leave it. ]
;B[cl]C[Finally Black returns to the left side. With 45, Black should be able to make a living shape. 

So, suddenly, after that strange opening, AlphaGo is looking sort of reasonable, playing like a "normal" player with moves that I can understand. ]
;W[ck];B[bk];W[bj];B[bl];W[dl];B[dm];W[em]C[There is a relatively simple way for Black to live (see var). ]
(;B[eq]C[This is a really interesting move, really sharp. Black 53 is a tesuji, with which Black tries to force White into a low position (see var). ]
(;W[ep]C[White plays strongly here];B[dp];W[cq];B[er]C[Black comes down and things get exciting now. Black is threatening to break out into the center (see var). ]
(;W[eo]C[Black cannot escape with the 2 stones (see var). ]
(;B[cj];W[bi];B[bp];W[bq];B[bo];W[fr];B[aq]C[Now this is really exciting. Most players wouldn't think to play this move. There are other ways for Black to make a life, but playing the forcing move in the corner first is pretty good. White should simply answer (see var). ]
(;W[dn]C[If Black tries to capture, it will be a ko (see var). ]
(;B[br]C[In the game Black chose to avoid the ko. ];W[dr];B[cr];W[es];B[cs]LB[dm:A]
C[Black gained two extra points in this sequence and White lost 7 points in the corner, so Black has gained 9 points. A White capture at A in sente is worth four points, so in the end it's a gain of five points for Black. White did gain thickness on the outside and so it's a question of whether that thickness is worth the loss of 5 points. Obviously AlphaGo thinks so, but I would say no, definitely not. In fact, in most games, that thickness would not amount to anything. It's not a mistake, per se, but a judgement that I don't agree with.

That said, it's hard to call. In some games, the difference on the outside would be pretty important too. I think human players, too, would have slightly different judgements as well. But with 5 points I think it's a bit too big. If it were, say, 3 points, I'd maybe lean towards AlphaGo's choice.  ]
;W[qc]C[White 72 is played with good timing to test Black's response. If Black wants to kill without a ko, Black must play on the second line, which is dangerous (see var).  ]
(;B[qd];W[mh];B[qp]C[This is a big move, securing the corner and starting to build a moyo on the right side. ]
;W[rd];B[re];W[cm];B[bm];W[rb]LB[dm:A]C[White can get a ko in the corner (2 vars added). Interestingly, we saw White waste a ko threat with the sente capture at A. It's just something AlphaGo does. I think it's limited to a certain amount of time per move, maybe two minutes per move, and perhaps sometimes it runs out of time and plays a forcing move like W78. That's why you see AI's play at a fairly regular pace, not spending a lot of time on a particular move. ]
(;B[nb]C[This is a really interesting move. Black is inviting White to live, but it turns out it's really hard to live without making a ko, so White wants to find the best way to live (4 vars). There is a way to live unconditionally, but it's really painful. 

B81 also reduces the eye-space of the White group in the upper center, so Black is preparing to chase White's group a little bit. ]
(;W[ph]C[This is a really beautiful move, but takes a bit of explaining. Locally it's a bit of an overplay, but...]
;B[nh];W[rf]C[W82 set up the clamp at 84 (2 vars added). ]
(;B[qe];W[se];B[qf];W[pb]C[At the cost of the bad exchange of 82 for 83, White has gained more than 10 points by living with the best possible shape in the corner. This is an even trade; I really like the way AlphaGo played here and I think it's a good trade for White. ]
;B[mi]C[Black gets to play the big move in the center. ];W[jc]C[White starts to develop eyes on the side.]
;B[nn]C[Black develops the moyo on the right.];W[ic];B[hd];W[ml]C[And White floats in from the center. ]
;B[jg]C[Black attacks White's upper side group but really has an eye on attacking W94. ]
;W[li];B[lj];W[mj];B[ni]C[White plays forcing moves at 96 and 98 to give the upper center group a window into the center...]
;W[ol]C[...and now White can take sente to reduce the right side. White's playing very adventurously. I have the feeling that after living with such a big shape in the lower left, Black had a slight advantage. When that happens in these self-played games, the side that's behind starts playing these very adventurous variations. ]
;B[kg]C[Now Black's really putting pressure on White in the center.];W[gb];B[fb]
;W[jd]C[Locally, the White group is not completely alive (see var) but because of bad aji, it's a bit difficult for Black to continue the attack.]
(;B[ok]C[If I were to attach a human emotion to this move, I'd say that it's because Black thinks it's ahead. ]
;W[rg];B[qg];W[on];B[kq];W[hc]C[White is now unconditionally alive. ];B[kj]C[White's group on the right is still weak (see var). ]
(;W[ro]LB[jq:A]C[White continues to strengthen the right-side group, but a play at A (see var) would have given White a lead in territory. The problem is that Black can counter-attack effectively, so maybe the hane at A is just too much to try. Throughout this series, I'm going to be pointing to moves like W112, where I'm not sure it's the optimal move in terms of maximizing points but is good enough to win, since it doesn't matter to AlphaGo whether it wins by half a point or 10 points. I have this basic distrust of AlpaGo when it has all of these games with the smallest possible winning margin; I sort of wonder if AlphaGo is just making them close on purpose. But I can't prove it. If it is doing that it's so early in the game, like now, when there are another 150 moves to go, and it's just too much for me to try to solve the endgame. 

Certainly human players do something similar, simplifying the game when they know they're going to win, especially because it's so complicated in the middle game and we don't have unlimited time to work out all the variations. But knowing that is pretty difficult; having that feeling you're going to win and then being able to transform that middle game into an endgame that's easier to understand is a gift that only the very top players have, those who led their era. Players like Honinbo Shuwa, Honinbo Dosaku, just a few players in history, who had a deep and intuitive understanding of the game.

But I don't think AlphaGo needs to simplify the game; I think it's at a level where its positional judgement is so good that it's already understanding who's going to win at a very early stage of the game. So yes, I'm suggesting that AlphaGo's playing the best moves to win, which is not necessarily the same thing as the best move from the human viewpoint; AlphaGo is not trying to play a perfect game, that's not the objective.       ]
;B[rp];W[no];B[jp];W[lp];B[jq];W[cn]C[Forcing moves like W118 are really bad, because they lose ko threats. In Game 1 I was having trouble finding the losing move, but I think I finally found it and the interesting thing is that it was way earlier in the game, and it was one of these forcing moves that just gave away a point. I'll show that in the book we're working on now about these games. ]
;B[bn];W[hf];B[if];W[gh];B[gg];W[rk]C[White 124 is really interesting and surprising, an attempt to reduce Black's side territory or make some eye space for the White group, depending on how Black responds (2 vars added). Black is still slightly ahead, and White is trying to catch up so they're having this little fight over a few points.  ]
(;B[pm]C[Black peeps first to cut White with good shape (see var). ]
(;W[rl];B[ri]C[Black 127 is the correct shape to cut White off on the side. ];W[pn]
;B[qm];W[ql];B[pl];W[rm];B[mn];W[om];B[kn];W[qj];B[nj];W[op];B[oq];W[rj]C[So White very cleverly saves everything, gaining a lot of territory. Black gained a little something towards the center, which is an area where you would have expected White to be gaining a lot of territory. I have a feeling that White got more out of this exchange than Black, but it turns out that Black is still leading, albeit by a smaller margin. ]
;B[lm];W[jo];B[ko];W[sp];B[rq]C[White can make life on the right side (see var). ]
(;W[jm]C[White forces from the center with 146 before living on the right. ];B[jn]
;W[jk];B[jj];W[mo];B[im];W[hl];B[ia];W[ja]C[The center and the right side are miai (see var)]
(;B[sf];W[sg];B[rh]C[With 157, White cannot make 2 eyes on the side. ];W[mm]C[White 158 starts to form a second eye (see var). ]
(;B[mk];W[ll]C[Black cannot capture White (see var). ]
(;B[io]C[So Black backs off...];W[km];B[ln];W[kk]C[...and White escapes into the center. ]
;B[hj];W[oj];B[nk];W[hn]C[White's weak groups have all survived, and now the endgame starts. ]
;B[dg];W[eh];B[ga];W[kb];B[cg];W[df]C[This is the final point where I have a problem with an AlphaGo move. This seems to be a chance for Black (see var). ]
(;B[eg];W[bg];B[fj];W[ej];B[fh]C[Now all the fighting is finishes and we're really in the endgame. It's a really nice, clearcut endgame for once. AlphaGo doesn't find a way to create some complicated ko, for example, as we've seen previously. It seems to go to great lengths to create a ko in endgame, and I'm reminded of Game 4 in the Alpago-Lee Sedol match, where Lee Sedol played this desperate move that wasn't really going to work, but it required some deep reading that apparently AlphaGo couldn't handle under the time constraints, and AlphaGo went berserk and basically melted down. The story is that folks at DeepMind decided that AlphaGo needed to train to handle these complicated positions, because that was identified as a weak point. Also there's the fact that in the match against Lee Sedol, AlphaGo was avoiding kos, almost as though it was allergic to them. So the DeepMind folks gave AlphaGo a series of complicated positions and forced it to study them and find the best move, which apparently gave it a set of moves that worked well in complex positions. This is something they discussed at the match with Ke Ji in China earlier this year. My sense is that this gave AlphaGo a very strong bias, not only toward playing kos, but for playing complicated positions. I think super-complicated positions began to look normal to AlphaGo. So this latest series features much more complicated fighting than a human player would feel happy with. ]
;W[lg]C[I'm not going to do a detailed analysis of the endgame, except to note that it's really a beautiful endgame, uncomplicated by kos, so you can really just look at the size of each move, and both sides are playing in the correct order. Each sequence of moved can be evaluated locally and anyone interested in studying endgame will be rewarded by studying this endgame. I myself spent several years really working intensively on my endgame and it's one of the important keys to getting stronger, not just for professionals, but for amateurs as well. ]
;B[kh];W[ir];B[jr];W[in];B[hr];W[sq];B[sr];W[so];B[ef]C[Black 189 threatens White on the left and sets up the following endgame sequence on the upper side (see var). ]
(;W[ch];B[ib];W[ha];B[hb];W[gc];B[ha];W[gd];B[ge];W[la];B[mb];W[lb]C[After this, I could find no important mistakes in the endgame. Black is winning by 0.75 stones (0.5~1.5 points). 

End of commentary ]
;B[ce];W[bf];B[de];W[jb];B[fa];W[hq];B[iq];W[gr];B[is];W[rr];B[qr];W[ss];B[di];W[ac]
;B[sh];W[ob];B[sf];W[sd];B[lh];W[oc];B[od];W[hp];B[ei];W[dh];B[ci];W[bh];B[be];W[ae]
;B[oh];W[hk];B[gk];W[pi];B[pg];W[fk];B[fi];W[eb];B[oa];W[pa];B[sb];W[rc];B[ie];W[gl]
;B[gj];W[gs];B[ea];W[lq];B[lr];W[da];B[ra];W[qa];B[pc];W[na];B[ma];W[hs];B[ir];W[mg]
;B[ke];W[nd];B[ne];W[kd];B[nc];W[mf];B[nf];W[qs];B[pr];W[dj];B[po];W[oo];B[aj];W[ai]
;B[ak];W[je];B[kf];W[ap];B[ar];W[ij];B[ii];W[ik];B[sj];W[sk];B[oa];W[sa];B[na];W[sc]
(;B[si];W[ho];B[ps];W[mr];B[rs];W[fe];B[ee];W[qs];B[af];W[ag];B[rs];W[sr];B[qs]
;W[gf];B[ff];W[ds];B[nl];W[ls];B[kr];W[nm];B[qo];W[lk];B[nr]C[B+0.75 stones (B+1.5pts)])
(;B[ho];W[sr];B[ps];W[rs];B[si]C[Black wins by 0.75 stones (1.5 points). ]))
(;W[rr];B[qr];W[ss];B[bf];W[be];B[bh];W[af];B[ci]C[Black gains many points on the left. ]))
(;B[bh];W[ci];B[eg];W[fh];B[bf];W[be];B[db];W[ac];B[cc];W[bc];B[eb];W[ae];B[hh]
C[This is a bit painful for White and seems to be slightly better for Black than the game sequence. ]))
(;B[kl];W[nm];B[ln];W[kk];B[lk];W[jl];B[km];W[io];B[in];W[hn];B[il];W[ik];B[hk]
;W[ij];B[hj];W[ii];B[hm];W[gl]C[White captures the Black group. ]))
(;B[ll];W[nm];B[ln];W[nk];B[oj];W[mk]C[White is alive. ]))
(;B[jl];W[rh];B[sh];W[sf];B[qi];W[sj];B[si];W[so]C[White is alive. ]))
(;W[rh];B[sh]C[Black's hane is the tesuji to cut White (2 vars)]
(;W[sf];B[qi];W[sj];B[si];W[so]C[White can live on the side. ])
(;W[qi];B[sf];W[si];B[sd]C[White's group in the corner will become a ko, so White is losing too much in this var. ])))
(;W[pn];B[rm]C[Black has good shape with this jump to the second line. ];W[ql];B[qm]
;W[pl];B[rl];W[rj];B[om];W[nl];B[nm]C[White collapses. ]))
(;B[rl];W[rj];B[ql];W[rh];B[qi];W[ri]C[White gains a lot in territory. ])
(;B[rj];W[rl]LB[ri:A]C[White gains some territory while making eyes, and has the connection underneath at A next. ]))
(;W[jq];B[lp];W[lo];B[lq];W[jp];B[ln]LB[jq:A]C[When White covers at A, Black will continue to attack in the center with this sequence, so maybe the hane at A is just too much to try. ]))
(;B[kb];W[lb];B[hb];W[hc];B[gc];W[ma]C[2 vars for Black's move]
(;B[na];W[ib];B[ga];W[ie]C[2 vars]
(;B[he];W[if];B[kf];W[ke];B[ia];W[kc];B[ja];W[ka];B[la];W[hf]C[White has enough local threats to win this ko. ])
(;B[je];W[ke]C[2 vars]
(;B[ia];W[kc];B[ja];W[he];B[gd];W[ka];B[la];W[jf];B[gg];W[ka]LB[hh:A][ki:B]C[White has local ko threats at A and B, and can win this ko. ])
(;B[kc];W[ia];B[mb];W[la]C[2 vars]
(;B[jf];W[ka]C[White lives with seki. ])
(;B[ka]C[Black tries to break the seki ];W[he];B[gd];W[jf];B[jb];W[if];B[kf];W[hg]
;B[hh];W[ih]C[White captures 4 Black stones in the center. ]))))
(;B[mb];W[ib];B[ga];W[la];B[ob];W[je];B[kf];W[ke]C[2 vars]
(;B[kc];W[ia];B[jb];W[ka]C[White is alive with seki. ])
(;B[ia];W[kc]C[White is alive. ]))))
(;B[se];W[qe];B[qf];W[pe];B[oe];W[pf];B[pg];W[qg]LB[ph:A]C[White's stone at A makes this work for White. ])
(;B[sd];W[sc];B[rc];W[ar]C[At this time White has enough ko threats to win the ko. ]))
(;W[rf];B[se];W[qe];B[qf];W[pe];B[oe];W[pf];B[pg];W[qg];B[of]C[This does not work for White. ])
(;W[pb]LB[sd:A]C[When White plays this way, Black still can make a ko later with Black A. White would like to find something better. ])
(;W[se];B[sf];W[sd];B[sc];W[rc];B[pb];W[pc];B[oc];W[rf];B[qe];W[rh];B[qf];W[sg]
;B[ri];W[qg];B[ph]LB[se:A]C[In this var White tried to force with A to get extra eye space, but Black can kill with this sequence. ])
(;W[sc];B[pb];W[qb];B[nn]C[When White lives this way White's territory in the corner is small. ]))
(;B[pb];W[pc];B[ob];W[oc];B[nc];W[qe];B[rf];W[od];B[pe];W[oe];B[pf];W[mf];B[nf]
;W[ne]LB[of:A][mb:B]C[In this variation Black tries to kill, but fails now as White has A or B next. ])
(;B[sd];W[sc]LB[cn:A]C[Since White has 3 valid ko threats in the LL corner, starting with A, White can win this ko. ]))
(;B[re];W[ob];B[nb];W[pc];B[sb];W[rd];B[sd];W[qe];B[rf];W[od]LB[mf:A]C[With the weakness at A, Black will have trouble trying to kill the White group. ]))
(;B[dr];W[br];B[ar];W[ap];B[ao];W[cs]LB[bs:A]C[Black continues at A to make a large ko. ]))
(;W[ar];B[ap];W[bs]C[If Black plays away, this will be a ko (see var). ]
(;B[dn]LB[ar:A]C[Black lives on the left. Compared to the game, White is not as strong in the center, but has gained 5 points in territory. 5 pts is a big difference, so I would choose this var for White. ])
(;B[qp];W[an];B[dn];W[bm];B[cm];W[bn];B[ak]LB[en:A][aj:B][cn:C][al:D]C[This kind of ko is called a Mannen (10000 year) ko, and it takes a long time to actually start. White must fill A, B, and C before starting the ko with D. Since starting the ko is disadvantageous for Black, all Black can do is wait for the ko to start. White need not hurry, and the ko can be expected to start in the endgame. This is a big liability for Black. ])))
(;B[fr];W[bo];B[bn];W[bp]C[White kills Black on the left side. ]))
(;W[fr];B[en];W[fp];B[fm];W[el];B[fn]LB[bp:A]C[Black makes a hole in White's wall. Black can live on the left with the hanetsugi at A later. ]))
(;W[er];B[ep];W[cr];B[en];W[fn];B[bp];W[bq];B[dp];W[cq];B[fp];W[gp];B[lh]LB[gq:A]
C[Black is alive with sente. With the potential cut at A, this is slightly better for Black than my suggestion shown as a variation for Black 53. ]))
(;B[ep];W[eq];B[en];W[fn];B[bp];W[bq];B[dp];W[cq];B[fp];W[gp];B[lh]LB[cm:A][bm:B]
C[Black will answer White A with Black B, and the left side group is alive with sente. ]))
(;B[ce];W[bd];B[be];W[ac];B[df];W[ck]LB[jc:A]C[Black can reduce the left side with this sequence, but without a stone at A to reduce White's eyespace, it is difficult for Black to kill the White group on the upper side. ]))
(;W[ck];B[lh]LB[ig:A]C[In this var, Black A is well placed to surround the upper side on a large scale. This is good for Black. ]))
(;W[qj];B[pk];W[oj];B[rj];W[ri];B[rk];W[qi];B[nl]C[With Black's strong shape in the upper left, White is under attack on both sides. ]))
(;B[go];W[fg];B[jd];W[dm]LB[fg:A]C[White A is an important point that reduces Black's potential on the  upper side and gives White some strength towards the center. ]))
(;B[qo];W[pn];B[qj];W[me];B[ke];W[le];B[pf]LB[pn:A][me:B]C[Playing a pincer on the right is Black's most natural move. I like this variation for Black, so I would be interested to see what sequences AlphaGo might suggest for White A or B. ]))
(;W[jd]C[White makes miai of the left and right (2 vars). ]
(;B[md];W[fg];B[de];W[df];B[ie];W[le]C[I would expect this to be an even fight. ])
(;B[fg];W[nc];B[qf];W[ne]C[Establishing a base on the upper side, White reduces the value of Black's wall on the left.])))
(;B[jd]C[This would be the natural move after black has invested three stones in the upper left and it would be natural for black to build towards the upper side. ]
;W[qf];B[qh];W[qc];B[pc];W[qd];B[pe]LB[qb:A][rf:B]C[White will probably continue with A or B. This is the way a human pro might play the game, but I guess not AlphaGo. ]))