(;GM[1]FF[4]SZ[19]AP[SmartGo:3.0.1]CA[shift_jis]
GN[RR05-master15_Park_Jung-hwan-Master_annotated]
PW[Park Jung-hwan]WR[9p]
PB[Master]BR[9p]
EV[Master Reviews]
DT[2016-12-30]
KM[6.5]
RE[B+5.5]
TM[60.0]
C[Commentary by Michael Redmond 9P

Park Jungwhan is the top Korean player, and usually he is placed second to Ke Jie in the world ranking systems. In this game Master shows some very strong fighting on the lower side. ]
TT[20]MU[1];B[pd];W[dd];B[pq];W[dp];B[fq];W[cn];B[qk];W[nc];B[pf];W[qc];B[pc]
;W[pb];B[mp]LB[ob:A][qd:B]
C[Playing away from the UR corner, Black leaves the option to choose between A or B later. ]
;W[rb]
C[With 14, White takes local profit.];B[fo]
C[With Black 13 controlling the lower side, it is natural for Black's next move to be this jump on the 5th line. Black expands the moyo to counter White's lead in territory. ]
;W[dk];B[em];W[dm];B[el]
C[Since Black can expand either the lower or right side, it is difficult for White to choose where to invade. I would suggest playing to the right (see var). ]
(;W[jo]
C[White invades the lower side. White plays 20 on the 5th line instead of a deeper invasion, with that idea that it will be difficult for Black to surround this group. ]
;B[lm]
C[Black 21 is a move that a player used to building moyos would play, and I can imagine Takemiya or O Meien playing this move. This already looks good for Black, so I wonder if Park underestimated this move, and I doubt that White 20 was the correct invasion point. ]
;W[jm];B[kk];W[jq];B[kp];W[jp];B[il]
C[White's group is surrounded now. White should have no trouble living on the side, but meanwhile Black will be consolidating the right side moyo. ]
;W[lr];B[mr];W[lo];B[mo]
C[Just living is not good enough (see var). ]
(;W[mq]
C[White 32 is a sharp move, with which White is trying to create some aji while living on the side (see var). ]
(;B[lq]
C[Cutting at 33 is a powerful fighting-style move which is unusual for AlphaGo. ]
;W[nq];B[kr];W[lp];B[kq];W[ln];B[mn];W[nr];B[ls]
C[With a weak group on each side, White would like to capture Black's lower side group. However, going after it immediately leads to a disadvantageous ko (see var). ]
(;W[mm];B[km];W[kn]
C[By cutting at 42, White creates aji in the center. If White can still get a ko on the lower side, this will be good for White (see var). ]
(;B[np]
C[Black 45 is ugly but effective. Black must fill this liberty to win the semeai on the lower side. ]
;W[jl];B[jk];W[op];B[oo]
C[Black wins the semeai (see var). ]
(;W[gp];B[fp];W[pp];B[oq];W[nn];B[no];W[ml];B[lk];W[po];B[on];W[pm]
C[White 60 is a tesuji to squeeze Black and make shape on the right side. ]
;B[or];W[pk];B[pj];W[qj];B[ql]
C[One worries about the lower side White group, which is too big to sacrifice. However, AlphaGo doesn't even try to kill it, and is playing simply now. ]
;W[pl];B[qi];W[rj];B[ri];W[oj];B[pi];W[gq]LB[mj:A][rm:B]
C[White's right side group is out of danger now. White can make an eye while moving out in the center at A, or make a living shape with B. ]
;B[hn];W[fr];B[er];W[hr];B[dq]
C[Black allows the White group to live. White has successfully  invaded both the right and lower sides, but is losing anyway. White's living shapes amount to tiny territories, Black has gained points on the lower and right sides, and now in the LL corner. This game demonstrates that AlphaGo is good at taking profit while attacking. ]
;W[go];B[gn];W[fs];B[cf]LB[ci:A][cc:B]
C[It is as if the game has returned to the opening stage. Black 81 makes miai of A and B. ]
;W[ch];B[cc];W[cd];B[dc];W[ed];B[bd];W[be];B[bc];W[ce];B[fc];W[ek];B[ef]
;W[bf];B[gj]
C[Black 95 prevents White's left side from expanding into the center, and also strengthens the Black group to make some Black territory in the center. ]
;W[rm];B[rk];W[pn];B[nm];W[qq];B[qr];W[rq];B[qm];W[rn]
C[White 96~104 is big in territory, and makes a living shape for the White group. ]
;B[ei];W[di];B[mc]LB[rd:A][cq:B]
C[With the lower right mostly played out, the upper side seems to be the final wide area. A and B are also huge endgame moves, and finally, the center area cannot be ignored. Black takes the initiative with 107. ]
;W[md];B[lc];W[nb];B[ld];W[ge]
C[White 112 reduces Black's upper side and sets up to expand the left side White territory into the center. ]
;B[rd];W[gc];B[fb];W[gh];B[gd];W[he];B[fd];W[fe];B[gi];W[eh];B[hd];W[cq]
;B[cr];W[bq];B[hh];W[gg]
C[Black 107 to White 128 was an exemplary endgame sequence, with both players having correct positional judgement and playing good shape moves. Now that the territories are well defined it cannot be denied that Black is winning, so I would look for a cause in the lower side fight, and I would suggest that White was in trouble already after move 20. End of commentary. ]
;B[rc];W[nd];B[qd];W[qb];B[do];W[co];B[lf];W[sb];B[fk];W[en];B[fn];W[je]
;B[id];W[ih];B[hg];W[ig];B[hi];W[ie];B[mb];W[im];B[hl];W[fl];B[fm];W[fj]
;B[gl];W[fi];B[rr];W[nl];B[br];W[kd];B[kc];W[sr];B[aq];W[ap];B[ar];W[cp]
;B[oi];W[nj];B[qn];W[qo];B[me];W[ne];B[nf];W[ng];B[of];W[ni];B[jr];W[ir]
;B[eo];W[dn];B[dl];W[cl];B[ji];W[es];B[ds];W[om];B[ns];W[hf];B[nh];W[mh]
;B[oh];W[mg];B[mk];W[nk];B[li];W[ec];B[eb];W[ep];B[eq];W[kh];B[jh];W[jg]
;B[kg];W[mi];B[lh];W[kf];B[lg];W[jd];B[jc];W[sl];B[sj];W[rl];B[ii];W[sc]
;B[sd];W[oe];B[pe];W[og];B[pg];W[mj];B[lj];W[ma];B[la];W[na];B[is];W[hs]
;B[js];W[ad];B[ac];W[ae];B[oc];W[ob];B[io];W[ip];B[ho];W[hp];B[hm];W[rs]
;B[qs];W[ke];B[ss];W[sq];B[nn];W[rs];B[kl];W[jn];B[ss];W[le];B[mf];W[rs]
;B[ao];W[bp];B[ss];W[gk];B[hk];W[ko];B[rs])
(;W[pr];B[pp]
(;W[or];B[qr];W[jr];B[oq]
C[Black wins])
(;W[ns];B[oq];W[or];B[qr]
C[Black wins])))
(;B[oo];W[jr];B[oq];W[ns];B[or];W[ms];B[np];W[lr]LB[kl:A]
C[Now White has ko threats such as A in the center, and White will win this ko. ]
))
(;W[jr];B[np];W[ns];B[oq];W[ms];B[or];W[lr];B[ko];W[kn];B[mr];W[gp];B[os]
;W[fp];B[me]
C[Black's right side territory is too big. Black wins. ]))
(;B[nq];W[lq];B[nr];W[lp]LB[mn:A][np:B]
C[Living up to 4 is satisfactory for White, as White can make use of the hane at A to create aji and invade the right side. Having the weakness at B to aim at will make any fighting on the right side relatively easy for White to handle.  ]
))
(;W[lq];B[mq];W[lp];B[me]
C[White is alive on the lower side, but that alone is not good enough. Since White must plan to invade again on the right side, this var is not good for White because Black has thick shape in that area.]
))
(;W[pl]
C[Two vars for Black's next move.]
(;B[pk];W[nl];B[ol];W[om];B[ok];W[mn]LB[rf:A]
C[My first idea is to reduce the right side. Since White can later slide at A, the upper part of the right side is relatively small, thus White can play the shoulder hit at 1 and invite Black to surround that area with 2~6. ]
)
(;B[ql];W[pn];B[nl];W[pp];B[op];W[qq]
C[White can make sabaki with this tesuji. ])))

