(;GM[1]FF[4]SZ[19]AP[SmartGo:3.1.7]CA[shift_jis]
GN[35_annotated]
PW[AlphaGo]
PB[AlphaGo]
EV[AlphaGo selfplay]RO[35]
KM[7.5]
RE[W+R]
RU[Chinese]MU[0]MU[0];B[pd];W[dc];B[pp];W[dq];B[de];W[ce];B[cf];W[cd];B[df]
;W[fc];B[co];W[fp];B[dl];W[nq];B[hq]TR[fp][dq]
C[Black 15 hits a weak point in the marked White group, and is usually Black's best local move.]
(;W[ej]
C[White 16 is the kind of move that is hard to understand, but fortunately the game sequence will show a good example of how this move works. If I were White, I would have simply protected the corner (see var).]
(;B[cq]TR[co][fp][dq][hq]
C[Black takes the corner. In this formation with the four marked stones, we always said that kicking at the star point was the vital point. I don't understand why AG did not (see var). ]
;W[cr]
(;B[bq]
C[Black playing the star point here would lead to a trade (see var). ];W[dn]
LB[ej:A]
C[White 20 coordinates with White's stone at A, and now we shall see the mainline of White's 'plan' when it played at A. ]
;B[cn];W[dm];B[cm];W[el];B[dk];W[ek]
C[White gets thick shape in the center, and seems to have a small overall advantage. ]
;B[dd];W[cc];B[dj];W[qn];B[pn];W[pm];B[on];W[qp];B[qq];W[qo]
(;B[pq]
C[While Black's connection at 37 was always the mainline joseki, in this board position I want to try the other modern joseki variant (see var). ]
;W[kq];B[go]LB[do:A]
C[Black is threatening to attack at A next. ];W[mo]LB[or:A]
C[White is threatening to attack at A next. ];B[lp]LB[or:A]
C[White was threatening to attack at A, so Black found a forcefull way to get the move at A with sente to settle the corner group. ]
;W[lq];B[or]
(;W[mp]
C[White 44 was a thick move, while I would have protected on the left (see var). ]
;B[do];W[ei];B[di];W[fo];B[fn];W[gn];B[gm];W[hn]
(;B[fq]
C[Black cannot afford to give away the whole side (see var). ];W[gp];B[eq]
;W[fm];B[en];W[gq];B[gr];W[fr];B[er];W[hr];B[fs];W[qj]LB[qc:A][rq:B][rr:C][sr:D]
C[White 64 is a suprisingly human-like move, while Leela suggests White A. Maybe AG has ideas of a ko with White B, Black C, White D. ]
;B[em];W[fl];B[nc];W[qf];B[ir];W[kj]LB[hm:A]
C[A good reason for White to play a stone in the center is that Black was threatening to push at A, and without a White stone at 70,  the following fight could be troublesome for White. 
]
;B[rd];W[md];B[mc];W[po]LB[oo:A][mi:B][li:C][hm:D]
C[Black has almost 70 points in territory, and White has almost 15 in the UL corner plus White's huge moyo in the center. While I would probably want to play with Black, this is a very difficult position and Black's next move is hard to choose. Should Black cover at A, looking to play the cut on the 3rd line, or maybe the safer moves such as B or C which would probably lead to a close game. Another choice would be Black D, that hits White's weakest point and is looking to erase the whole center.]
;B[pl]
(;W[oj]
C[If White had pushed through, maybe Black was going to view the exchange as a kikashi (see var). ]
;B[nk]LB[qm:A]
C[The threat is a Black cut at A. ];W[om];B[nj];W[oi];B[ni];W[od]
C[White 82 is actually a common move with which White is trying to play some forcing moves against the corner and get some added influence towards the center. This brings back memories of game 4 of the Lee Sedol-AlphaGo match. ]
;B[oc];W[pe];B[qe]LB[pc:A][oe:B][rf:C]
C[Black 85 was the strongest move that refused to give White anything. While Black has a weak point at A, locally White cannot accomplish anything when B and C are miai. To succeed, White must use the cut at A in combination with an attack in the center. ]
;W[oe];B[rf];W[li];B[qk];W[qg];B[rj];W[qi]LB[rf:A]
C[After playing the hane at A, the Black corner territory is secure for the time being. ]
;B[lk];W[ml];B[lj];W[ki];B[ok];W[qm]LB[lc:A][rq:B][rr:C][sr:D]
C[Does this look like White is going for the throat? Well yes, but White actually has a number of options from here on. If White can squeeze the corner with A and surround an area on the upper side, the territory can get close again. Otherwise, White might be able to capture the LR corner with a ko at B, Black C, White D.  ]
;B[kk];W[lc];B[lb];W[ld]LB[kb:A][rq:B]
C[White attacks the center indirectly. I assume that Black could live by adding a stone to the group in the center, but then White could play at A and the game would be close, and not to forget that White can get a ko with B later. ]
;B[mm];W[km]
C[White 104 was at a vital point, keeping the pressure on Black's group. ]
;B[ik];W[hl];B[ri];W[pc];B[qd];W[rh]
(;B[kb]
C[Black took territory with 111, grabbing a huge lead. Maybe there was no good way for Black to live in the center. The var shows what I would call White's plan in the case that Black had added a stone to the center. ]
;W[qc];B[rc];W[ob]LB[kb:A][nd:B][ii:C]
C[Black has already protected at A, so now White is asking for one more forcing move at B, after which White can play at C and I see no way for Black to survive. ]
;B[rl]LB[kb:A]
C[After playing at A, it makes no sense for Black to play away now, because this will just get worse for Black. The corner will be some kind of a ko, and it should be obvious that Black doesn't want a ko with this board position. Maybe this is just another example of how some AI choices cannot be explained with human logic. ]
;W[rb];B[sb];W[nb];B[mb];W[qa]LB[ra:A]
C[With this hanging connection White avoids the simple semeai, which would favor Black, and offers to play a ko with Black throwing in at A. White has an abundance of ko threats, and White is likely to win the corner. ]
;B[ng];W[mf];B[mg];W[oh];B[lf];W[nh];B[mh];W[jc];B[kc];W[kd];B[jd];W[nd]
;B[id];W[mi];B[og];W[pf];B[jh];W[ij]
(;B[lm]TR[mg:mh]
C[I think Black wanted to save the marked stones, but there is no good way to make a connection in the center (see var). ]
;W[je];B[ie];W[jf];B[in];W[im];B[hk];W[ih];B[ho];W[hm];B[nm];W[nn];B[hp]
;W[if];B[ic];W[io]
(;B[gb]
C[Mending Black's connection in the center was also a big move (see var)]
;W[iq];B[hs];W[kl];B[si];W[sg];B[ll];W[ip];B[hr];W[jk];B[eb];W[bf];B[bg]
;W[ec];B[fb];W[af];B[ag];W[bd];B[gg]LB[ch:A]
C[Black 173 protected against the White peep at A. ];W[sk]
(;B[rk]
C[Black had to connect here to avoid getting a false eye (see var). ];W[so]
LB[rq:A][rr:B][sr:C]
C[White already had the option for a ko with White A, Black B, White C. The drawback of that ko is that Black gets a big territory if Black wins. In the game, White finds a ko that doesn't lose territory. ]
;B[rp];W[ro]LB[sk:A][sl:B]
C[The earlier move at A comes into play as White threatens to kill with B. ]
;B[rm];W[sq];B[rq];W[sp];B[sr];W[rr];B[rs];W[qr]LB[ss:A]
C[White got a ko that it could afford to lose, so AG starts by wasting a ko threat. Obviously it was better to take first at A, and obviously, AG doesn't care because White is winning anyway. ]
;B[pr];W[ss];B[gk];W[jj];B[sr];W[eh];B[qs];W[he];B[hf];W[hg];B[gf];W[gh]
;B[dh];W[pb]
C[White is going to win the ko in the UR corner.];B[ra];W[sa];B[sf];W[se]
;B[ra];W[ib];B[hc];W[sa];B[ca];W[ba];B[ra];W[jb];B[hb];W[sa];B[hi];W[hh]
;B[ra];W[pj];B[pk];W[sa];B[qh];W[ph];B[ra];W[ma];B[ia];W[sa];B[be];W[ae]
;B[ra];W[la];B[ja];W[sa];B[ac];W[bc];B[ra];W[sm];B[sl];W[sa];B[ea];W[cb]
;B[ra];W[ol];B[nl];W[sa];B[ad];W[ab];B[ra];W[qb];B[fh];W[gi];B[fi];W[fj]
;B[jm];W[rg];B[jl];W[jn];B[kn];W[il];B[fg];W[eg];B[mr];W[nr];B[lr];W[kr]
;B[re];W[oa];B[sd];W[gl];B[jo];W[ls]
C[The game is close before komi.])
(;B[sl];W[ol];B[nl];W[ql];B[pk];W[rk];B[sj];W[rk]
C[Black is dead.]))
(;B[gk];W[iq];B[hs];W[ip];B[hr];W[gl];B[kn];W[jm];B[kl];W[hi]
C[Assuming Black A, White B White still has a decisive advantage in the upper right corner ko. There is also a ko in the LR corner for Black to worry about.]
LB[si:A][sg:B]))
(;B[jf];W[lm];B[si];W[sg];B[sk];W[ke]LB[je:A][kg:B]
C[This var shows Black trying to surround White in the upper right, but White is likely to capture Black in the UR corner, so the White group is relatively safe. Black's connection in the center is not perfect, and White can cut Black off with A or B. ]
))
(;B[rl];W[kb];B[mh];W[pb];B[qc];W[mb];B[qb];W[ii];B[lg];W[kf];B[nl];W[rq]
;B[rr];W[sr];B[rp];W[sp];B[sq];W[dh];B[ch];W[rq]LB[rl:A][mh:B][lm:C]
C[Even after adding stones at A and B, Black's group in the center is not really safe. White starts a ko in the corner and Black has no valid ko threats. After White wins the ko, White will be ready to go after the center with White C. ]
))
(;W[om];B[li];W[lj];B[ni]TR[pl][om]
C[In this var, the marked exchange gives Black some extra potential to erase the right side. ]
))
(;B[em];W[fr];B[hm];W[in];B[im];W[jn]
C[White gets a big side territory. ]))
(;W[do];B[mp];W[kp];B[np];W[jn]LB[do:A][mp:B]
C[White A connects White's group on the left. White can dodge Black's attack at B and take the offensive on the lower side. ]
))
(;B[np];W[po];B[op];W[rq];B[ho]LB[np:A][ho:B][pr:C]
C[Black A is another new move that gained popularity after AG played it in the Master-human pro internet series. Black's final move at B is a vital point in this board position, while the standard joseki move would have been Black C. ]
))
(;B[dp];W[bq];B[eq];W[cp];B[dr];W[cq];B[ep];W[bo]LB[cq:A]
C[This trade where White takes the corner while Black gets an outside wall was originally said to be good for Black (context of surrounding stones could change that judgement). Things changed in the mid-20th century when Go Seigen liked to play this with White, and he thought that the corner territory was big, or at least highly efficient with the captured Black stone at A effectively reducing the number of moves that White had to play to get this shape. Go Seigen went on to defeat the best players in his Jubangos, and eventually they had to grudgingly agree that this is good for White. ]
))
(;B[dp];W[eq];B[cq];W[cr];B[bq]LB[dp:A][eq:B][dn:C]
C[Compared to the game, the added exchange of Black A for White B has improved Black's shape and taken away some of White's flexibility. At least, that's what human pros have being saying for the last few hundred years. Strangely, I found that Leela does not seem to agree, and White's score actually went up with White playing next at C. The continuation will probably be similar to the actual game sequence, and to me, the A-B exchange still looks good for Black.]
))
(;W[cp];B[do];W[gq];B[hp];W[fn]LB[dj:A][kq:B]
C[This is the simple way for White to protect the corner territory to make a living group, and prepare follow-up moves at A or B. I would play this way with White. ]
))

