(;GM[1]FF[4]SZ[19]AP[SmartGo:3.1.3]CA[UTF-8]
GN[Game_011]
PW[AlphaGo Lee]
PB[AlphaGo Zero]
KM[7.5]
RE[B+Resign]
RU[Chinese]ST[2]
TM[7200.0]OT[3x60 byo-yomi];B[qp];W[dp];B[qc]
C[While the 20 block AGZero just plays star points with White, it plays this combination of a komoku with a 3-3 point in almost all of the games in this set when it has Black. This is interesting, as it did not play this opening in the self-play training set. It is the only version of AlphaGo that likes to play the 3-3 point as a first move in a corner. ]
;W[dc];B[np]
C[The 20 block AGZero likes this big shimari, so in this it's similar to AGMaster. ]
;W[ci]
C[AGLee likes to play the Chinese opening. It did not have an opportunity to do so with White in the 2016 match against the human Lee Sedol, because Sedol played a kakari at A first.]
LB[de:A];B[cq]
C[The 20 block Zero likes to invade at the 3-3, maybe even more than the 40 block version. ]
;W[cp];B[dq];W[eq];B[er];W[fq];B[fr];W[gq];B[gr];W[hq];B[eo]
C[Black's peep here is a probe that has become popular among human pros. If White connects at A, this will have been a kikashi for Black. ]
LB[ep:A];W[dm]LB[ep:A][hn:B]
C[When White answers by surrounding the side, it is probably not good for Black to continue here immediately. Later in the game, Black will try to make the cut at A effective, or can try to force White to connect at A by building a strong position in the center, maybe with a Black stone in the vicinity of B. ]
;B[de];W[fd];B[cc];W[cb];B[cd];W[bb]
(;B[ch]
C[AGZero 20-blocks has it's own joseki for this position in the upper right. The human joseki is shown as a variation. ]
;W[dh];B[bi]
C[Black's hane underneath is a tesuji. ];W[di];B[bh];W[bj];B[dg];W[eg];B[df]
C[Black is alive. ];W[bp];B[bq]
(;W[pd]
C[With the shoulder hit, White starts to emphasize the center. This is a position I think it is clear that White wants to play some kind of a kakari against the UR corner, and maybe  I would play a kakari from the upper side (see var). ]
;B[qd];W[pf]
(;B[od]
C[With this move, the wedge is also feasible (see var). ];W[qj];B[hc]LB[ql:A]
C[The extension at A was also an important point, but the upper side is wider. Zero's plan seems to be to limit White's moyo to the left side, and take a lead in territory. ]
;W[gc];B[hd];W[ff];B[ep];W[cn];B[ge];W[fe];B[gb];W[fb];B[ld]
C[Surrounding the upper side, Black has a lead in territory, while White has potential in the center. ]
(;W[mp];B[nq];W[mn]
C[Now White starts to surround the center in earnest. ];B[pe]
C[Black finishes the upper side, making a territory of more than 30 points.  ]
;W[oe];B[pc];W[je];B[kd];W[no]
C[It is very difficult for White to surround the whole center, as Black will jump in with the next move. White A is a multi-purpose move that builds influence in the center, sets up a big move at B, and is looking at aji in the corner, such as White C. ]
LB[no:A][qn:B][pq:C];B[lo];W[mo];B[hn]TR[eo:ep]
C[Black is playing in the vicinity of the marked two stones, but is not committed to saving them. It is more important that Black is pressuring the White group at A, and is preparing to erase White's potential in the center. ]
LB[hq:A];W[jq];B[il];W[qn]
C[White is looking at the aji at A. ]LB[pq:A];B[ip];W[iq];B[mq];W[lp];B[kl]
TR[lp][mq]
C[Black's LR corner looks weak, and I would be thinking of protecting at A. However, the marked exchange has made a difference, and Black can survive without too much damage. ]
LB[pp:A]
(;W[jk]
C[White starts by attacking in the center. The variation shows what might happen if White attacks the corner first. ]
;B[ik];W[jj];B[jl];W[lk];B[em];W[el];B[fm]TR[mn:mp][no][lp][jq]
C[Black adds stones to the center group, making some eyespace. It is also important that Black has isolated the marked White group. This gives Black a potential counter-attack, which will come into play when White attacks the LR corner. ]
;W[fl];B[kk];W[kj];B[gl];W[gk];B[go];W[hl];B[gm];W[hk];B[ij]LB[lj:A][dl:B][fk:C]
C[Black pushes out to take a vital point. It does not matter that Black has inadequate eyespace, because the cuts at A, B, and C are going to be troublesome for White. ]
;W[jn]
C[White reduces Black to one eye, and threatens to cut at A. ]LB[im:A];B[dl]
;W[dk];B[lj];W[mk];B[li]
(;W[pq]
C[Now White attacks the corner. The cut at A does not work for White at this time (see var). ]
LB[im:A];B[pp];W[qq];B[rq];W[rr];B[rp]
(;W[kh]
C[White switches back to the center. The variation shows how White should have continued in the corner. ]
;B[fk];W[ek];B[fj]TR[jj:jk][kj][gk:hk][hl]
C[Black attacks the two groups of three stones. ];W[gj]
(;B[ih]
C[With this move, there is a more direct way for Black to make a double threat in the center, but it will fail when White can cut at A (see var). ]
LB[im:A];W[gi]
C[White threatens to cut at A. ]LB[im:A];B[jo];W[kn];B[in];W[jh];B[lq];W[kp]
;B[hg];W[mg];B[qf]
C[Black has a small lead in territory. ];W[or]
(;B[oo]
C[Black avoids the relatively close endgame (see var), and allows White to live in the corner. Breaking into White's right side territory is more valuable than capturing the corner. ]
;W[sr];B[pm];W[aq]
C[This is where AGLee starts to play some strange moves, reminding me of the suicide dance that it did in game 4 against the human champion Lee Sedol.]
;B[ar];W[im];B[hm];W[jm];B[gh];W[fi];B[hp];W[jp];B[io];W[bf];B[be];W[ad]
;B[bc];W[ac];B[ae];W[qm];B[pl];W[qk];B[ok]
C[Black's kosumi is the correct shape, and White has bad aji on both sides (see var). ]
(;W[ni];B[ri];W[ii]
C[The game is already hopeless for White, and White's moves here are meaningless or just mistakes from the human viewpoint. ]
;B[hi];W[ji];B[hj];W[bg];B[ag];W[ic];B[id];W[jd];B[jc];W[jb];B[ib];W[kc]
;B[ic];W[cf];B[ai];W[dr];B[cr];W[ie];B[kf];W[ig];B[nj]
C[Black finally ignores the center and just goes for the kill on the right. ]
;W[hh];B[fh];W[ej];B[ih];W[cs];B[ds];W[hh];B[lh];W[ih];B[ko];W[ln];B[oi]
;W[lc];B[mc];W[oh];B[ml];W[ll];B[pi];W[qi];B[qh];W[ph];B[rh];W[oj];B[pj]
;W[pk];B[oj];W[ol];B[om];W[nl];B[nh];W[ql];B[pn];W[mb];B[md];W[lb];B[nb]
;W[nc];B[ob];W[ka];B[lg]
C[There is no special reason for Black not to win the semeai (a step ko) by playing at A, apart from the fact that Black can win even after sacrificing the whole upper side. ]
LB[ma:A];W[ro];B[qo];W[rn];B[nm];W[mm];B[nn];W[ke];B[le];W[mj];B[mi];W[nk]
;B[ni];W[en];B[do];W[oq];B[op];W[dn];B[fn];W[br];B[bs];W[cg];B[af];W[aj]
;B[ce];W[lf];B[lm];W[km];B[mf];W[bg];B[cg];W[ma];B[rj];W[co];B[ap];W[ao]
;B[an];W[bn];B[bo];W[am];B[aq];W[ao];B[nr];W[os];B[kr];W[jf];B[kg];W[sq]
;B[sp];W[fp];B[fo]
C[While the whole endgame was very strange from the human viewpoint, the fact is that Black was ahead throughout, and in this final position Black is winning by only 1.5 points. For AlphaGo, the winning margin is not an issue. ]
)
(;W[oj];B[nj];W[nk];B[ql];W[rl];B[rk];W[rm];B[rj]TR[rj:rk]LB[oj:A][ql:B]
C[If White tries to enclose Black with A, Black will push through at B and cut. White cannot both capture the marked Black stones and save White A, so White's position will fall apart. ]
))
(;B[sr];W[op];B[oq];W[oo];B[nr];W[pg];B[qg];W[ph];B[if];W[kf];B[ri]
C[Black captures the corner, while White squeezes from the outside. This will be a close game. ]
))
(;B[gi];W[fi];B[hj];W[ej];B[ki];W[im];B[jo];W[kn]TR[gi][hj]LB[ki:A][im:B][in:C]
C[With the two marked forcing moves, Black can capture three stones in the center. However, this is bad when White kills Black on the side with B. This Black group needed the forcing move at C to have a living shape. ]
))
(;W[or];B[sr];W[op];B[oq];W[oo];B[nr];W[pr];B[qs];W[lq];B[os];W[mr];B[ns]
;W[im]LB[or:A][sr:B][lq:C][im:D][oo:E]
C[When White plays at A, Black can capture White with B. White gets to squeeze Black, and the extra stone at C makes it possible for White to cut at D. ]
;B[jo];W[kn];B[in];W[fk];B[dn];W[cm];B[hp];W[jp];B[io];W[kh]LB[io:A][fk:B]
C[Black can live with the sequence to A, but in the process White has gained a stone at B, and the fight in the center is now advantageous to White. ]
;B[ih];W[jh];B[hg];W[ig];B[hh];W[mg];B[if];W[kf];B[qf];W[ad];B[be];W[pg]
;B[qg];W[ph];B[ri]
C[Black escapes in the center, and White gets the right side. This looks like a close game. ]
))
(;W[im];B[jm];W[in];B[hm];W[fk];B[kn];W[jo];B[jp];W[ko];B[kp];W[ln];B[io]
;W[km];B[kq]
C[If White cuts at A, Black can use this squeeze to capture White on the lower side. After this disaster, capturing seven stones in the center will not be good enough for White. The aji at B is relevant to this variation if White can squeeze the corner first and create a forcing move at C, which would change what happens in this variation. ]
LB[im:A][pq:B][lq:C]))
(;W[pq];B[pp];W[qq];B[rq];W[rr];B[rp];W[or];B[oo];W[sr];B[pm]LB[pq:A][oo:B][pm:C]
C[White A is the vital point in the corner. Black allows White to live in the corner, escaping with B and C. ]
;W[qm];B[pl];W[ql];B[pk];W[pn];B[on];W[nm];B[om];W[nk];B[oj];W[qi];B[ml]
;W[nl];B[ni]TR[qi][nk]
C[White has chased Black out into the center, but it is not clear that White will be able to continue attacking. The two marked White groups are not settled yet, and this is bad for White. White's attack at A has backfired, with White losing too much in the center and right side. ]
LB[pq:A]))
(;W[bf];B[be];W[ad];B[bc];W[ac];B[ae];W[cf];B[ai]
C[Now that Black's side group is completely enclosed, we can take a look at the tsumego. A and B are interchangeable points, and Black is alive. ]
LB[bf:A][be:B]))
(;B[pe];W[oe];B[qe];W[ng];B[nc];W[pk]LB[pe:A]
C[If Black wedges at A, White will play high as shown. White is weak in territory, but is building potential towards the center that will work well with White's position on the left. ]
))
(;W[nc];B[qf];W[kd]
C[With a kakari at A and the extension on the side, White creates a potential territory on the top. This is an even result. ]
LB[nc:A]))
(;B[cg];W[ff];B[eg];W[ef];B[df];W[dh];B[bi];W[bj];B[bh];W[cj];B[dg]LB[cg:A][dg:B]
C[The old joseki has Black playing the knight's move at A, and after the sequence to B, Black is alive. This is considered to be an even result. ]
))

