(;GM[1]FF[4]SZ[19]AP[SmartGo:3.1.7]CA[shift_jis]
GN[38annotated]
PW[AlphaGo]
PB[AlphaGo]
EV[AlphaGo selfplay]RO[38]
KM[7.5]
RE[W+R]
RU[Chinese]MU[1];B[pd];W[dp];B[pq];W[dc];B[de];W[ce];B[cf];W[cd];B[cq]LB[df:A][fc:B]
C[While human pros would sometimes play away from the joseki in the UL corner and allow White to cut at A, robots almost always suggest that Black should exchange A for White B, and then there are a number of choices for Black's next move. This was true when I showed this board position to Leela, and Black had about 41 percent if connecting at A, while that dropped to about 35 after Black's game move at 9. ]
;W[dq];B[cp];W[cn];B[co];W[do];B[bn];W[df];B[hp]
C[AG likes to pincer the wall at this distance. The obvious threat is that Black will cut on the fourth line next. Black 17 would be a difficult move for me to play, because assuming White extends at A, it will be too close to White's strong position. ]
LB[cm:A]
(;W[qo]
C[Suprisingly, White plays away form the LL corner. See the variation for what I would recommend. ]
;B[dn]LB[hp:A]
C[When Black cuts here, the pincer at A is well placed. This fight can often occur after the direct 3-3 invasion, and this game will show some of the recurring patterns, so this will be both exciting and educational. ]
;W[cm];B[bm];W[op]LB[op:A]
C[If we are to believe the robots, pressing at A is just good, in just about any board position. So I guess this move was easy for AG, while I would be looking fore a move in the lower left. ]
;B[qp]LB[rp:A][ro:B][oq:C]
C[Kicking at 23 is another new idea suggested by computer programs, and now it is seen in human play. Locally, White can play at A or B to build towards the right side, or can cover at C to switch to the lower side. ]
;W[cl]
C[White switches back to the left. While it is impossible for me to say how exactly the lower left and lower right are interacting, or why White should be jumping back and forth like this, there are some points that I can observe. Firstly, White A is a stone on the outside while Black B is inside, so White A has more potential to have a positive effect in the fight on the left. While this cannot be shown in a forced variation, it may be the most important point. Secondly, the two White stones in the lower right are relatively light and flexible, and in the case that Black plays the next move in the LR area, maybe White can sacrifice one or both stones without too much damage. If White were to add stones to this group, it could become heavy and less easy to sac.  In the case that White plays the next move in the LR, White has multiple choices, as I mentioned in a comment for Black 23. ]
LB[op:A][qp:B];B[en];W[cr];B[br];W[bq]
C[White 28 is a tesuji that is often seen in this fight. If Black plays at A, White can start a ko with B. ]
LB[bp:A][ar:B]
(;B[aq]
C[Black is avoiding a ko in the corner by capturing from the first line. There was also a trade that White offered, and Black refused (see var). ]
;W[gp]
C[White 30 is the shape here, and White can live on the side or escapetowards the center. ]
(;B[gq]
C[Black takes away White's base to chase White into the center. The other option was to cover from above (see var). ]
;W[bs];B[ar]
C[Capturing at A would have allowed a ko in the corner. ]LB[bp:A]
(;W[go];B[fp];W[fq];B[fr];W[eq];B[er];W[dr]
(;B[hq]TR[fp]
C[Pulling out the marked cutting stone would have been an exciting sideline (see var), but the game move at 41 is probably better. ]
;W[fn]TR[fp]
C[White 42 is the correct shape, aiming to capture the marked stone while making an eye. ]
(;B[dl]TR[fp]
C[Black cannot save the marked stone (see var). ];W[eo];B[ck];W[in];B[kp]
;W[pp];B[qq];W[ro];B[nr];W[pk]
C[We finally get to see how White can finish the LR corner shape. ];B[pn]
;W[po];B[lo]LB[mq:A]
C[Black wants to prevent White from playing at A, but the placement of 55 was unexpected. At first, Leela did not seem to agree with this move, so Iet it ponder while I made lunch. Later I came back to see that Leela had done more than a million playouts, and finally chose the game move.  ]
;W[qc];B[pc];W[qd];B[qf];W[qe];B[pe];W[rf];B[qb];W[mp];B[lq];W[rb];B[rg]
;W[pf];B[qg];W[pb];B[re];W[qa];B[of]
(;W[no]
C[White threatens a ko on the lower side. If Black were to protect at A, this exchange would have strengthened White's group on the right in preparation for escaping the ladder. The variation shows White escaping from the ladder immediately. ]
LB[nq:A];B[jm]
C[Black makes the ladder while attacking White's group. ];W[gl];B[hl];W[hm]
;B[ho];W[hn]LB[hl:A][ho:B][fo:C]
C[The strange forcing moves at A and B were probably just to create a ko threat at C. ]
;B[rd];W[rc];B[cg];W[ef];B[eh];W[mr]
C[Finally White starts the ko. ];B[mq];W[or];B[oq];W[nq];B[np];W[bp];B[bo]
;W[nq];B[fo];W[gn];B[np];W[bk];B[cj];W[nq];B[ns];W[os];B[np];W[el];B[nq]
C[Black was out of valid ko threats, so connecting the ko was forced. ];W[bl]
;B[bj];W[am];B[ap]
C[The Black group is alive. ]
(;W[nk]
C[The variation shows how Black is alive in the LL corner. White 110 reinforces White's group on the right and also breaks the ladder. ]
;B[qj];W[qk];B[fc]LB[qj:A][pf:B]
C[Black's play at A has captured the White stone at B with a net. ]
(;W[gd]TR[pf]
C[The variation shows how the marked stone cannot escape. ];B[gc];W[id];B[fd]
;W[rj]LB[pg:A]
C[After White 118 White threatens to escape at A. ]
(;B[mg]LB[nk:A][jm:B][rj:C]
C[Black 119 changes the ladder so that it will miss the White stone at A and end by being captured with the Black stone at B. The variation shows how White's stone at C took away Black's option to capture with a net. ]
(;W[di]
C[The variation shows that White cannot escape at A. When White plays 120 one should note that White B or C would threaten to kill Black in the corner, so White has potential to attack strongly here. ]
LB[pg:A][dm:B][dk:C];B[an]LB[dj:A][ek:B]
C[Black lives in the corner, creating forcing moves for Black at A or B. ]
;W[dh];B[dg];W[eg];B[ei];W[ej];B[gh];W[gg]TR[fc:fd][gc]
C[White's main idea here is to improve the attack on the marked Black stones. ]
;B[gf];W[fg];B[dj];W[ic];B[hd];W[he];B[ib]
(;W[jb]
C[White could have covered on the other side, but then Black would have escaped easily (see var). ]
;B[hb];W[kc];B[hf];W[hc];B[ee];W[fh]
(;B[db]LB[cb:A][eb:B]
C[Black 143 is a probe, and Black seems to be attempting to complicate matters. If White covers at A, Black can later pull back at B to threaten to kill the corner. If White covers at B, there is potential trouble in the corner with a Black extension at A. The variation shows Black playing in a more straightforward manner, but that is an easy win for White. ]
;W[fi]
C[White simplifies the game by capturing two stones. ];B[cb];W[ci];B[dm]
;W[em];B[dk];W[bi];B[ak];W[bc];B[bb]TR[cf:cg][dg][eh:ei]
C[While Black took the corner territory and some stones on the left, White got compensation with taking the marked stones. White has a small lead. ]
;W[nh];B[pi];W[mn];B[nc];W[if];B[ge];W[hg];B[hd];W[ie];B[dd];W[ng];B[nf]
;W[be];B[cc];W[ad];B[ri];W[pj];B[qi];W[kn];B[lg];W[oc]
(;B[mi];W[oi];B[md];W[lj];B[li];W[kj];B[ob]
(;W[io]
C[White 182 prevents Black from reducing the center (see var) and creates a threat on the side. ]
;B[jh];W[nb];B[od];W[jq]
(;B[jr]
C[Black cannot push through on the fourth line with 187 (see var). ]
(;W[ii]
C[White cannot erase the entire lower side (see var). ];B[ab];W[jp];B[kr]
;W[af];B[oa];W[pa];B[ln];W[lm];B[mm];W[mo];B[nj];W[mj];B[ji];W[ni];B[jj]
;W[jk];B[ko];W[jn];B[ik];W[jl]
(;B[rn]
C[Black 209 looks very much like a meltdown when I was thinking it looks fairly close. I took a shot at the endgame with Black playing 'normally' (see var). ]
;W[rp];B[kl];W[km];B[sc];W[sb];B[rm];W[qm];B[qn];W[on];B[om];W[nm];B[rk]
;W[rl];B[sj];W[sl];B[kk];W[im];B[ig];W[mb];B[mk];W[oj];B[ml];W[nl];B[jd]
;W[le];B[ja];W[jg]LB[ih:A][kb:B]
C[Black resigned. If Black A, White B, and the White froup is alive. ])
(;B[lb];W[ih];B[ij];W[ek];B[al];W[rp];B[rk];W[rl];B[ac];W[bg];B[sj];W[rq]
;B[rr];W[sr];B[sq];W[sp];B[rs];W[lc];B[mc];W[hj];B[jg];W[ig];B[sl];W[rm]
;B[ke];W[ph];B[bd];W[ae]
C[Just small moves now. White will win by about 2.5 points. ]))
(;W[ir];B[iq];W[kr];B[jp];W[js];B[ip];W[hr];B[gr];W[lr];B[kq];W[hs];B[jr]
C[This ko does not threaten the Black group, and Black has plenty of ko threats on the lrft and upper sides, so this is a failure for White. ]
))
(;B[jp];W[ip];B[iq];W[ir]
(;B[hr];W[hs];B[gr];W[jr]LB[hr:A][jr:B]
C[Black loses. Allowing a squeeze by playing Black A at B would be almost as painful. ]
)
(;B[jr];W[gr];B[kq];W[hr];B[jq];W[ii])))
(;W[jh];B[ln];W[lm];B[jn];W[km];B[jo]
C[Black reduces White's territory in the center. ]))
(;B[ob];W[md];B[nd];W[mf]))
(;B[fi];W[gi];B[fj];W[gj];B[ek];W[fk];B[ej];W[hh];B[ff];W[dm];B[bf];W[be]
;B[jf];W[af];B[bh];W[ag];B[ak];W[nc]
C[White is safely ahead.]))
(;W[hb];B[hc];W[jb];B[hf];W[fh];B[fi];W[gi];B[fj];W[hh];B[ie];W[je];B[if]
C[Black is alive.]))
(;W[pg];B[ph];W[og];B[oh];W[ng];B[nf];W[nh];B[ni]
C[White cannot escape. ]))
(;B[hd];W[pg];B[oh];W[ph];B[pi];W[qh];B[rh];W[qi]
C[White escapes. ]))
(;W[pg];B[oh];W[ph];B[pi];W[qh];B[rh]
C[White cannot escape. ]))
(;W[an];B[ak];W[dm];B[ao]
C[Black connects underneath. ]))
(;W[pg];B[qk];W[ph];B[pj];W[ql];B[qj];W[pl];B[oj]LB[pg:A][qk:B]
C[If White extends at A, Black can make shape with the attachment at B. ]
))
(;B[eo];W[em];B[fm];W[dm];B[gn];W[ep]
C[Black loses. ]))
(;B[eo];W[fm];B[hq];W[fn];B[ep];W[bo];B[bp];W[em];B[ds];W[dg]LB[eo:A][fm:B]
C[If Black plays at A to save the cutting stone, White's best response is to play at B and sacrifice the group. White is good with superior thickness in this variation. ]
))
(;W[fp];B[gn];W[hq];B[iq];W[hr];B[ip];W[gr]))
(;B[go];W[bs];B[ar];W[hq];B[gq];W[fp];B[iq];W[hr];B[ip];W[ir];B[jr];W[fq]
LB[go:A]
C[If Black covers from above at A, this var shows an example of how White can live on the side. ]
))
(;B[dr];W[bo];B[cs];W[bp];B[cr];W[bl]LB[fp:A][go:B]
C[White gets a good position on the left, and can still make some use of the three White stones, so this is good enough for White. White's next local move could be A or B. ]
))
(;W[cm];B[bm];W[cl];B[pn];W[jq]LB[kp:A][po:B]
C[If Black's final corner enclosure is played at A, then White B will follow. In either case, this looks like a comfortable opening for White. ]
))

