(;GM[1]FF[4]SZ[19]AP[SmartGo:3.1.3]CA[utf-8]
GN[Game_007]
PW[AlphaGo Zero]
PB[AlphaGo Master]
KM[7.5]
RE[W+R]
RU[Chinese]
TM[7200.0]OT[3x60 byo-yomi]MU[0]MU[0];B[pp];W[dd];B[dq];W[pd];B[dn];W[qq]
;B[pq];W[qp];B[qn];W[qo];B[po];W[rn];B[jp];W[cf];B[dg];W[cl]LB[qq:A][cg:B][em:C][dp:D]
C[This is the same fuseki as always. After studying these games for about a month and trying out some of the moves that Zero likes, I can say that I still have my doubts about the early 3-3 invasion at A, and I don't think I will be using it in serious games. White 16 is also an unusual move that would usually be played at B. After playing at 16, Zero has follow-up moves at C or D, and chooses between them depending on the board position. In this game, we will be looking at the Master-Zero joseki for when White plays at C. ]
;B[nc];W[kc];B[gd]LB[nc:A][pf:B]
C[Black 19 is a move that Master seems to like in this opening, sometimes playing it before the kakari at A, and it is a move that I would not have thought of in this board position. A double kakari such as Black B looks normal to me. ]
;W[em]
C[White 20 is a follow-up for A that Zero played in 4out of 10 games. This starts what I will call a Master-Zero joseki when Black pushes through to cut. ]
LB[cl:A];B[dm];W[dl];B[el];W[dp]
C[White 24 is a vital point in the corner, and also seems to be Zero's favorite move against Black's big corner enclosure. In some cases Zero attached here without pressing at A first, as we saw in game 5 of this set. ]
LB[em:A]
(;B[ep]
C[Master played this hane every time. The other feasible move that Master never played was the hane underneath (see var). ]
;W[ek]
C[In preparation to sacrifice the marked stone, White plays the atari at 26. ]
TR[em];B[fl];W[eo]
(;B[en]
C[With Black 29, the most natural move would be to cut on the 4th line, and another feasible-looking move would be to play an atari from the corner (see 2 vars). ]
;W[eq];B[fp];W[cq];B[dr];W[do];B[fo]
(;W[cr]
C[White covers at 36. If Black A, White will connect at B, and this will be better for White when compared to connecting on the side immediately (see var). ]
LB[er:A][bn:B];B[cp];W[co];B[bo]
C[Black 39 is a tesuji to squeeze White. ];W[bp];B[cn];W[cp];B[fk]
C[With Black 43, this local sequence comes to a pause, and the overall position seems to favor Black. While both Master and Zero are treating this like a joseki, I say that Master has refuted Zero's new experiment in the corner, and I do not advise playing this with White. ]
;W[cg];B[ne];W[pg];B[pf]
C[Black 47 is much in Master's style, taking a local loss to control most of the board. Black will give the right side to White and create strength towards the center. ]
;W[qf];B[qe];W[pe];B[of];W[rf];B[og];W[ph];B[oh];W[pi]
(;B[pm]
C[Black 57 is a very unusual move in the joseki in the lower right (see var). ]
;W[rm];B[qr];W[rr];B[oi];W[pj];B[ic]LB[oj:A]
C[Black 63 was an unexpected change in direction. Covering at A would have been more consistent, and the overall position looks good for Black. That said, the outcome of this game will depend on what happens after White dives into the Black moyo.  ]
;W[bn];B[bm];W[ao]LB[bn:A][er:B][fn:C]
C[Capturing a stone with A and 66, White has removed the forcing move that Black had at B, and is asking how Black will respond. There is bad aji on the lower side when White can cut at C as an atari. ]
;B[cm]LB[fn:A]TR[ek][cl:dl]
C[Black 67 removes the threat at A while cutting off the marked White group. ]
;W[nk]
C[White 68 is a strategically important point, and while I still think Black has a good position, it is not as decisive as before. ]
;B[dh];W[ch];B[ml];W[jq]
C[White 72 starts what will be an example of top level sabaki. White will not be able to live on the side, but will make aji to create forcing moves that will change the fight in the center and create an endgame sequence on the left.  ]
;B[kq];W[ip];B[iq];W[jr];B[ir];W[mk]LB[jq:A]
C[It doesn't bother White that the group at A is dead. I might say that was part of the plan. White has created various forcing moves, and now will combine that aji with the fight in the center. ]
;B[lk];W[lj];B[kj];W[li];B[nl];W[kp];B[jo];W[kr];B[lq];W[io]LB[lp:A][ll:B][jn:C]
C[White 88 looks at potential both to the right and to the left. For now, White is threatening to force with A, and then use the cut at B to make a ladder at C. ]
(;B[in]TR[io:ip]
C[Black 89 reduces the liberties of the marked two stones, reducing the value of a White play at A (see var). ]
LB[hq:A];W[ol]
C[When White plays at 90, there is still some aji on the side, and combined with the cutting points in the center, this is a dangerous situation for Black. ]
(;B[ll]
C[
Black protects the center. Covering at A would have been dangerous (see var).]
LB[om:A];W[om];B[mj];W[nj];B[mi]LB[om:A]
C[Black has lost territory by allowing White to push through at A, but as my comments should indicate, Black had little choice. Black now cuts White off in the center. and the game still looks good for Black. ]
;W[ki];B[kg];W[jn];B[ko];W[hn];B[im];W[hq]
C[White can still reduce Black's territory on the lower side with this sequence, and for now will just play some forcing moves before returning to the center. ]
;B[hr];W[gq];B[lr];W[gr];B[ks];W[jj];B[fq]TR[gq:gr][hq]LB[er:A]
C[It will not be easy for Black to kill White's group in the center, so Black plays this big move on the side. If White had not played the marked forcing moves already, Black could have played 109 at A, so even though White has been captured, the forcing sequence has reduced Black's profit. ]
;W[kk];B[pc]
C[With 111 Black is playing forcing moves, taking a local loss to reinforce the outside Black group. ]
;W[qc];B[qd];W[rd]
(;B[jm]
C[Black 115 might seem to be a tight move, but there was a weakness here that Black had to deal with before attacking in the center (see var). ]
;W[ih];B[jf];W[mh];B[dc];W[lg];B[le]
(;W[hc]LB[dc:A]
C[White 122 was an amazingly sharp reply to Black A. Black has a small lead if White simply answers in the corner (see var). ]
;B[hd];W[ec];B[ni];W[jl];B[km];W[il]
C[White secures a life for the group in the center. ];B[ed];W[ib]LB[hc:A][eb:B]
C[With the attachment at A and White 130, White is making aji on the upper side to create a forcing move for White at B. ]
(;B[gc]
C[Black 131 could be the losing move. White was able to create a forcing move at A that changed the story in the UL corner. However, even the alternative that I suggest is not a clear-cut victory for Black (see var). ]
LB[eb:A];W[cc];B[db];W[hb];B[jc];W[eb]
C[The exchange on the upper side has made White 136 a forcing move, threatening to connect at A. ]
LB[gb:A];B[hj];W[bl];B[am];W[kl];B[hl];W[hk];B[lm];W[ik];B[gj];W[kf];B[jg]
;W[hi]
C[White 48 prevents Black A, and White is alive in the center. ]LB[ji:A]
(;B[gb]
C[Black has no choice but to back off (see var).];W[ee];B[fd];W[cd];B[er]
C[Black 153 is the biggest endgame move. ];W[gn];B[fm];W[fn];B[go];W[mf]
;B[me];W[oc];B[pb];W[ob];B[od];W[re];B[nb];W[oe];B[oa];W[nf]TR[ob:oc]
C[White captured 8 Black stones, but Black had little choice, and got some profit on the side taking two marked stones, so the sequence here was reasonable for both sides. After this, the endgame seems to be reasonable, and I can find no winning chances for Black. ]
;B[ql];W[pl];B[qm];W[qk];B[cj];W[bj];B[rl];W[on];B[pn];W[pr];B[or];W[qs]
;B[bi];W[ci];B[bk];W[di];B[al];W[rk];B[sm];W[nq];B[np];W[no];B[oo];W[mn]
;B[mp];W[dk];B[ro];W[rp];B[sn];W[nr];B[oq];W[os];B[sk];W[cs];B[hm];W[sj]
;B[bh];W[gf];B[fh];W[ea];B[fb];W[id];B[jd];W[ie];B[je];W[hf];B[de];W[df]
;B[fe];W[ef];B[ff];W[gh];B[fg];W[bg];B[an];W[ar];B[rb];W[qb];B[qa];W[rc]
;B[bo];W[ap];B[lf];W[ln];B[ah];W[aj];B[ak];W[ag];B[gi];W[hh];B[ei];W[dj]
;B[ai];W[sb];B[ra];W[ds];B[es];W[bj];B[aj];W[lo];B[kn];W[ej];B[fj];W[eg]
;B[eh];W[lp];B[mq];W[ck];B[sc];W[cb];B[sa];W[fa];B[ga];W[sp];B[so];W[ms]
;B[if];W[he];B[rj];W[si];B[sr];W[rs];B[ri];W[sh];B[qd];W[qe];B[ok];W[oj]
;B[rg];W[sg];B[gk];W[bn];B[ij];W[ji];B[em];W[ng]
C[W+1.25 (2.5)])
(;B[cd];W[de];B[cb];W[gb];B[bd];W[jb];B[lb];W[lc];B[mb];W[kb]LB[cd:A][gb:B][jb:C]
C[If Black If Black takes the corner with A, then White's connection at B and then C is too big, and Black will lose. Black cannot kill the White group. ]
))
(;B[hb]
C[If Black cuts here, White cannot use A as a forcing move, and must find a way to save the stone at B (two vars for White's move). ]
LB[eb:A][hc:B]
(;W[gc];B[fc];W[gb];B[jb];W[ha];B[jc]LB[gc:A][jb:B]
C[If White simply escapes at A, Black will atari once and then protect the side with B. Black's side is intact, and White's corner is falling apart. ]
;W[eb];B[de];W[cd];B[ce];W[ee];B[fd];W[be];B[fb]
C[White collapses.])
(;W[fd];B[ee];W[gc]LB[fd:A][gc:B]
C[White must play the atari at A first and then escape with B, inviting a trade of the upper side for the corner (two vars for Black's move). ]
(;B[jb];W[id];B[jc];W[fe];B[de];W[cd];B[ce];W[cc];B[bd];W[bc];B[bf]LB[jb:A][fe:B]
C[Black must capture at A, protecting the side territory, and White pushes through at B. A difficult fight will continue on the left, and I think that Black has an advantage. ]
)
(;B[fe];W[id];B[fc];W[gb];B[cd];W[bl]LB[fe:A][id:B]
C[If Black covers at A, White will take the side with B. This trade of the side for the corner favors White, and Black's lead is gone. ]
))))
(;W[ec];B[ed];W[cc];B[db];W[eb];B[cb];W[cd];B[fc];W[ee];B[fd];W[bb];B[er]
LB[ec:A][er:C][ed:B]TR[cf:ch]
C[If White covers at A, Black cuts at B, and White must play defensively to protect the marked group. After fixing the shape and slightly reducing White's corner, Black switches to C, and I think Black has a small lead. ]
))
(;B[jh];W[jm];B[il];W[lm];B[ln];W[mn];B[km];W[kl];B[jl];W[nm]LB[lm:B][jh:A]
C[If Black immediately attacks at A, White B becomes the tesuji to capture Black's cutting stones. Locally this trade is a failure for Black, and the game looks close. ]
))
(;B[om];W[lp];B[lr];W[ll];B[kk];W[nm];B[mm];W[jn];B[ko];W[lo];B[kn];W[km]
;B[jm];W[ln];B[jn];W[nn]TR[ml:mm][nl]
C[White captures the marked stones. ]))
(;B[jn];W[hq];B[hr];W[gq];B[lr];W[fq]LB[jn:A][hq:B]
C[If Black pulls back at A, White can hane at B to reduce Black's side area with this sequence. ]
))
(;B[rm];W[qm];B[pn];W[rl];B[pm];W[sm];B[nj]LB[rm:A][pn:B]
C[The joseki move is for Black to play the hane at A, and in this case Black will continue to surround the center. Compared to the game sequence, Black gets an extra stone at B that reinforces Black's outside shape slightly. ]
))
(;W[bn];B[cr];W[bp];B[bq];W[cp];B[fk]LB[bn:A][cr:B]
C[If White simply connects at A, Black can turn at B with sente. This is good for Black. ]
))
(;B[do];W[cp];B[cq];W[co];B[fo];W[eq]LB[do:A][eq:B]
C[If Black cuts at A, the following few moves seem to be forced, but Black has two choices when White cuts at B (two vars for Black's move). ]
(;B[en];W[fp];B[eo];W[er];B[bq];W[bn];B[fq]LB[en:A][er:B][fq:C]
C[If Black captures at A, White will play at B, and the corner becomes a semeai after Black cuts at C. ]
;W[fr];B[gq];W[gr];B[hq];W[hr];B[ir];W[iq];B[jq];W[is];B[jr];W[dr]LB[iq:A][dr:B]
C[White cuts at A to extend White's liberties by one move. White turns at B, and the semeai favors White. ]
(;B[bp];W[bo];B[cr];W[bs];B[cs];W[ds];B[fk]LB[ar:A]
C[White's group has 5 liberties, so White will win a direct semeai, but Black can make a step ko later by playing at A. The overall position is about even. ]
)
(;B[cr];W[bs];B[bp];W[bo];B[cs];W[ds]))
(;B[fp];W[bq];B[br];W[bp];B[er];W[fk]LB[fp:A][bq:B][fk:C]
C[If Black connects at A, White will hane at B, and White's group is connected on the left side. White will push at C, and this position is about even. ]
))
(;B[cp];W[do];B[co];W[eq];B[fp];W[cq];B[dr];W[fo]LB[cp:A][fo:B]
C[If Black plays an atari at A, White will cut twice and then escape with B, leaving Black with a lot of bad aji to deal with. ]
;B[go];W[gp];B[fq];W[gn];B[ho];W[fn];B[bq];W[hn];B[io];W[hl]LB[go:A][bq:B][cn:C]
C[Black can force with A to surround the lower side, but then must return to protect at B. White threatens to cut at C later to capture two Black stones, and this will succeed as soon as White has added a stone to the marked outside group. Because of this threat, White can expect to gain an extra tempo in the outside fight. Black has a lead in territory, and the overall position seems to be about even. ]
TR[ek][cl:dl]))
(;B[cp];W[co];B[do];W[ep];B[cq];W[bn]LB[cp:A][bn:B][em:C]
C[If Black plays at A, the following sequence seems almost forced. White connects underneath at B, and it becomes apparent that the stone at C is causing a lot of aji, which was the point in playing there first, after all. ]
;B[fo];W[eq];B[gq];W[fm];B[er];W[ek]LB[fo:A][gq:B]
C[When Black presses at A and surrounds White with B, the semeai in the corner favors Black. White will sacrifice three stones to get an advantage in the outside fight, which will continue when Black escapes from the ladder. White has potential to attack on the upper half of the board, and in all, the game seems to be about even. ]
))

