(;GM[1]FF[4]SZ[19]AP[SmartGo:3.1.1]CA[utf-8]
PW[AlphaGo Zero]
PB[AlphaGo Master]
KM[7.5]
RE[W+R]
RU[Chinese]
TM[7200.0]OT[3x60 byo-yomi]MU[0];B[dd];W[pp];B[cp];W[pd];B[fp];W[cc];B[cd]
;W[dc];B[fc];W[ec];B[ed];W[fb];B[dj];W[nq];B[mp];W[hq]
(;B[qf]LB[mp:A]
C[The shoulder hit at A was a favorite move for AGMaster as well as AGKeJie, but it is unusual for the opponent to play away. Can Black make good use of this stone? (see var)]
;W[qk]LB[qf:A][qk:B]
C[When Black plays the kakari at A, the upper side looks relatively small compared to the right side, so it seems natural for White to play a pincer at B.]
;B[nc];W[pf];B[pg];W[of];B[qd];W[qc];B[qe];W[pc];B[qi];W[md];B[og];W[mc]
C[Locally, this trade in the UR corner is good for White. Black can afford to play this way because the upper side already had a low value with the joseki in the UL corner giving White a low shape. ]
(;B[gb]
C[Now that White has a strong position on the right, Black must fix the shape in this corner, so Black's hane at 31 was well timed (see var). ]
;W[gc];B[fd];W[hb];B[gd];W[ga]LB[gb:A]
C[The sequence starting with Black's hane at A has strengthened Black's wall, at the cost of giving White some extra territory on the side. As we saw in the Master series, AGMaster attaches high value to the center, and likes to control the flow of the game, so Black's play is true to Master's style. ]
;B[hp]
C[Black continues to build on the left side moyo, and that is natural in this position. While the left side is Black's biggest asset in this game, it is still far from becoming territory. Any move that enlarges Black's potential here has a large value. ]
;W[ip];B[ho];W[gq];B[fq];W[io]
(;B[np]
C[Black 43 was a mistake, and I will comment again at W48 to clarify why I think so (see var). ]
;W[mq];B[in];W[jq]LB[jn:A][im:B]
C[
White does not hane at A, as that would induce Black B and help Black to surround the center. ]
;B[jn];W[op]
C[White calmly tales the side territory, showing us what might be called AGZero's game plan throughout this set of games. Black's left side is still not territory, and Zero is looking at possibilities to dive in. White's territory is already close to 60 points, so surrounding on the 4th line is probably not good enough for Black if the center disappears. Black A, which I called a mistake, has effectively become an exchange for White B, which helps White by consolidating the corner territory. ]
LB[np:A][op:B];B[lq];W[lr];B[lp];W[kq];B[ek]LB[hn:A]
C[In this position, when Black has potential both on the left side and in the center, and the cut at A was a potential problem, B53 seems to balance these factors well. ]
;W[dp]
C[White's attachment at 54 can relate to a cut at A, depending on how Black answers. ]
LB[hn:A];B[dq];W[bj]
C[W56 aims to play at A next to erase the left side. ]LB[co:A];B[bl];W[cq]
C[W58 is a probe that will create forcing moves from outside, or a potential life in the corner, depending on how Black replies. ]
;B[me]
C[B59 shows AGMaster's willingness to take a local loss when it tries to control the center of the board. This was very successful in the Master series against top human pros. ]
;W[le]LB[me:A]
C[Black A was an overplay locally, and W60 takes advantage of that. ];B[lf]
C[Black's plan is to sacrifice the stone at A and force from outside, increasing Black's potential in the center. ]
LB[me:A];W[mf]
C[White could have tried to reduce the center with a play at A, but instead takes the offered gift and allows Black to force from the center. W62 shows AGZero's bias towards grabbing cash and dealing with the opponents moyo later. AGMaster likes to start with giving away territory for control and influence, so there is a strong tendency for the games in this set to be a battle between Zero's territory and Master's moyo, especially when AGMaster has Black.]
LB[ke:A];B[ne];W[nf];B[ke];W[ld];B[kd];W[nd]
(;B[cr]
C[Black finally returns to the LL corner. B69 refuses to let White make life (see var). ]
;W[ch]LB[bj:A]
C[Making use of the stone at A, White invades the left side. ];B[eh];W[be]
;B[bd];W[cf]
C[White A was a painful move that reduces White's corner territory by inducing Black B, but it gives White the necessary eye space. ]
LB[be:A][bd:B]
(;B[rn]
C[Black plays away. While White's group on the left side is not completely alive, there is no effective way for Black to attack at this time (see var). ]
;W[rp];B[qo];W[qp];B[mr];W[nr];B[ir];W[iq];B[on]
C[While White has successfully invaded the left side, this does not necessarily mean that Black has no hope. Black still has potential in the center and the right side. ]
;W[eg]
C[Before White tries anything in the center, it adds a move to secure life for the group on the left side. ]
;B[dh];W[dg];B[fg];W[bg]LB[fh:A][hn:B]
C[White calmly adds a stone at 88, securing life. White seems to be saying that it can attack weak points such as A or B to reduce the center. With White, I would be afraid that Black might find a way to secure a large center territory, but AGZero seems very comfortable with this type of a middle game. ]
;B[mh]
C[I find it difficult to judge B89, with which Black is trying to build on both the right side and the left part of the center. White has a number of ways to cause trouble, which make it difficult for Black to find a simple and effective solution. White is looking at cuts at A or B, as well as moves such as C or D. ]
LB[fh:A][hn:B][ff:C][hf:D];W[lg];B[kf];W[nh];B[mj];W[mg];B[kg];W[lh];B[kh]
;W[hf]
C[W98 was timely, played just after Black's tight moves at A and B have removed most of the bad aji that Black had on the left. W98 is not trying to destroy Black, but is just asking for Black to back down a bit. White is making miai of C and D.]
LB[kg:A][kh:B][ff:C][hd:D]
(;B[gf]
C[Black compromises with 99. This allows White to connect to the top, but give Black good aji with a connected shape (see var). ]
;W[hd];B[hg];W[ml]
C[W102 was a brilliantly strong move in a position in which a player with White might feel insecure. Throughout this game I have been reminded of the battles between Takemiya with his big moyos, and his nemesis Cho Chikun who would invade deeply. I would say that W102 attacks Black's moyo instead of merely trying to reduce it. This is a move that I might expect from Cho Chikun in his best years. ]
(;B[nl]
C[The human comment for B103 is that it lacks in fighting spirit. This is a safe move, but I think Black needed to play more strongly (see var). ]
;W[nm];B[om];W[ck];B[cl];W[nk];B[ol];W[mk];B[pj];W[eq];B[dr];W[fr]
C[W114 was a well timed and troublesome move. ]
(;B[fo]LB[hn:A]
C[B115 was a tight move that reduces the danger of a cut at A (see var). ]
;W[qm];B[qn];W[pn];B[po];W[oo]LB[qm:A][pn:B]
C[With the peep at A and the wedge at B, White was setting up the forcing move at 120. This loses some points on the right side, but secures a potential connection for the marked White group to the lower side. ]
TR[mk:ml][nk][nm];B[pk];W[er];B[ep];W[ri];B[rh];W[do]
C[W126 is a probe, and White is looking at the potential to extend at A or cut at B. ]
LB[bq:A][hn:B];B[es];W[gr]
(;B[kj]LB[do:A]
C[Instead of answering A, Black surrounds the center with 129 (see var).]
;W[pm];B[rm];W[ql];B[qj];W[hn];B[hm]
(;W[dk]
C[W136 tries to take profit on the side before reducing the corner (see var). ]
;B[dl];W[ej]
(;B[co]TR[ej]
C[If Black tries to capture the marked cutting stone, trouble will erupt on the left side. If Black backs up in the center, White will still have a big move in the corner. So, Black chooses 139, a big move in the corner (see 2 vars). ]
;W[rj];B[pl];W[fk];B[el];W[di];B[fj];W[ei];B[fi];W[fh];B[gh]
C[White has taken considerable profit with the sequence to 149, and now I would say White is ahead. ]
;W[rk];B[si];W[ff];B[gg];W[ie]LB[ge:A]
C[White threatens the ko at A. ];B[ge];W[kc];B[lj];W[ko];B[lm];W[nj];B[mi]
;W[ni];B[kr];W[ms]
(;B[jd]TR[nj]
C[White's marked group is safe. Black's correct play is to force once more in the center, and I tried to work out the endgame, which seems to be a small win for White (see var). ]
;W[kk];B[nn];W[km];B[kn];W[ng]LB[km:A]
C[When White could force once at A before connecting at 170, this gave White an opportunity to reduce Black's center more than expected. ]
;B[jk];W[jl];B[bk];W[cj];B[rc];W[rb];B[jc]
C[Black just plays away from the center. B177 is a big move, and Black is going to lose even if this move is played to protect the center. ]
;W[jj];B[ik];W[gi];B[gj];W[ij];B[hj];W[il];B[hk];W[ki];B[ji];W[gn];B[dn]
;W[hl];B[gl];W[gm]
(;B[kb]
C[The potential ko at A can be counted out, as White has ko threats on the right side. Black has no good move in the center after W192 (see var). ]
LB[lk:A];W[lb];B[mb]
C[After this the endgame gets messy, with AGMaster trying to throw the game but AGZero controlling the score to get the smallest margin. ]
;W[nb];B[bc];W[bb];B[ab];W[ba];B[da];W[db];B[ma];W[na];B[ea];W[eb];B[sd]
;W[ln];B[lo];W[im];B[aj];W[ai];B[sb];W[ra];B[jr];W[hr];B[ii];W[la];B[he]
;W[id];B[if];W[ro];B[rl];W[lk];B[li];W[sn];B[sk];W[fn];B[eo];W[sm];B[sj]
;W[ib];B[jb];W[kp];B[jo];W[mm];B[mn];W[qb];B[jp];W[ks];B[fm];W[em];B[fl]
;W[en];B[fs];W[sa];B[ef];W[ak];B[al];W[dm];B[cm];W[ee];B[fe];W[de];B[ae]
;W[ce];B[af];W[sc];B[rd];W[ph];B[qg];W[oh];B[pe];W[oe];B[pr];W[rr];B[rq]
;W[qq];B[so];W[sp];B[sl];W[so];B[ic];W[hc];B[ag];W[ah];B[gs];W[is];B[eh]
;W[je];B[jf];W[ia];B[aj];W[bf];B[ad];W[ak];B[gp];W[js];B[aj];W[lc];B[no]
;W[ak];B[sb];W[aj]
C[White wins by 0.25 stones (1.5 points)])
(;B[im];W[ln];B[lo];W[fl];B[fm];W[fn]LB[gp:A][gk:B]
C[Black is in damezumari on both sides, so White can capture at A or B. ]
))
(;B[nn];W[mm];B[mn];W[ng];B[jd];W[kl];B[jl];W[ic];B[rc];W[rb];B[sd]LB[mn:A][ng:B]
C[Playing at A to force White B first reduces White's potential to reduce Black's territory in the center. ]
;W[sb];B[bk];W[ro];B[sl];W[sn];B[sj];W[so];B[sm];W[cj];B[bc];W[bb];B[ab]
;W[ba];B[jc];W[jb];B[he]LB[sb:A][he:B]
C[White A is the largest move, and Black B is the final big endgame point. ]
;W[id];B[if];W[km];B[kn];W[kk];B[jk];W[lo];B[ln];W[ph]TR[ph]
C[White's marked move is about 3 points. ];B[qg];W[oh];B[ef];W[fs];B[ds]
;W[gp];B[go];W[jr]
C[There are only small moves left now. ];B[df];W[sc];B[rd];W[qh];B[rg];W[jm]
;B[im];W[de];B[ee];W[ce]
C[1 and 2 point moves are left. ];B[aj];W[ai];B[ak];W[eh];B[pe];W[oe];B[je]
;W[li];B[ki];W[ae]TR[ae]
C[The marked move is the final point. ];B[ac];W[cb];B[kp];W[jo];B[no];W[ll]
;B[pi]
C[White wins by 0.25 stones, or 1.5 pts.]))
(;B[fj];W[el]
C[Does Black capture or connect. Either way White can attack Black on the left (2 vars for Black's move). ]
(;B[fk];W[co];B[bp];W[bo];B[bq];W[em]
C[White wins the semeai on the left. ])
(;B[ei];W[fk];B[ej];W[bq];B[co];W[dn];B[br];W[cn];B[bp];W[bo];B[aq];W[em]
;B[bn];W[bm];B[ao];W[bk];B[cm];W[gn];B[fn];W[gm];B[fm];W[gl];B[fl];W[gk]
;B[en];W[go];B[dm];W[gp]
C[Black captures several stones on the left but loses the game when White destroys Black's potential in the center. ]
))
(;B[fk];W[di];B[ei];W[cj];B[fj];W[bq];B[co];W[br];B[dn];W[cs];B[eo];W[dp]
;B[do];W[fs]LB[ej:A][bq:B]
C[After taking profit with the cut at A, White scoops out the corner with B. This is an easy win for White. ]
))
(;W[bq];B[co];W[br];B[dn];W[cs];B[eo];W[dp];B[do];W[fs]
C[White can connect underneath, and this is worth about 20 points. In the game White tried to get a little extra by forcing with A first. ]
LB[dk:A]))
(;B[co];W[jl]LB[co:A][jl:B][hn:C]
C[Locally, Black needs this move at A. White will probably jump in at B, looking at the aji to cut at C. ]
))
(;B[er];W[gp];B[go];W[fo];B[ep];W[hn];B[gn];W[hm];B[fn];W[il]LB[er:A][fo:B][hn:C]
C[If Black cuts at A, White can push through to cut at B and C, changing the balance of power in the center. ]
))
(;B[kj];W[ol];B[mn];W[ri];B[rh];W[pi];B[qh];W[qm];B[qn];W[nj];B[mi];W[ni]
;B[ll]
C[A is an important move when Black wants to finish the center territory. After White jumps in at B, Black's group can connect to the center. Assuming this sequence, it looks like Black has enough to win. ]
LB[kj:A]))
(;B[ge]LB[ki:C][id:B][ge:A]
C[I might have played at A, cutting White off. Locally this is the best move, as it cuts White off. However, there is some bad aji with moves such as White B or C, and it is possible that White might be able to use this aji to reduce Black's territory in the center, so I can not be sure that Black A is the best move. ]
))
(;B[bg];W[bh];B[bf];W[ce];B[ae];W[af];B[ag];W[cg];B[ad];W[ef];B[ff];W[eg]
;B[fg];W[dh]
C[Black cannot kill the White group. ]))
(;B[do];W[dr];B[ep];W[bq];B[er];W[cs]
C[If Black takes from above with A, White can force with B to live in the corner. ]
LB[do:A][dr:B]))
(;B[in];W[jq];B[jn];W[mq];B[ek]LB[in:A][np:B][op:C]
C[Black should simply hane at A, without the B-C exchange. Assuming the same continuation as the game, Black has a good deal of aji in the LR corner that can be made use of later in the game. ]
))
(;B[ho];W[fd];B[gc];W[gb];B[hc];W[fe]LB[ho:A][fd:B]
C[If Black plays away from the UL corner with A, for example, White can immediately cut at B. With White's strong shape on the right, White will have an advantage in this fight. ]
))
(;B[mq];W[np];B[mo];W[dp]LB[mq:A][dp:B]
C[If Black covers at A, White will push once and then attach at B, AGZero's favorite move against the Black shimari (2 vars for Black's move). ]
(;B[do];W[dq];B[cq];W[cr];B[cn];W[er]
C[White gets a living shape on the side. ])
(;B[dq];W[eq];B[ep];W[do];B[cq];W[fq];B[gp];W[hp];B[fn];W[gq];B[bn];W[gn]
;B[fm];W[kq]LB[dq:A][eq:B]
C[Master never played the hane at A, so this diagram is my own invention. White's only feasible move is to hane at B, and if the following trade happens, this is good for White. The Black stones on the right have become a liability. ]
)))

