(;GM[1]FF[4]SZ[19]AP[SmartGo:3.1.7]CA[shift_jis]
GN[41annotated]
PW[AlphaGo]
PB[AlphaGo]
EV[AlphaGo selfplay]RO[41]
KM[7.5]
RE[W+R]
RU[Chinese]MU[1];B[pd];W[dd];B[pq];W[dp];B[qk];W[nc];B[cq];W[dq];B[cp];W[cn]
;B[co];W[do];B[bn];W[qc];B[qd];W[pc];B[od]
(;W[nd]
(;B[ne];W[me];B[mf];W[nf];B[oe];W[le];B[lf];W[ke];B[ng];W[kf]
(;B[eb];W[fc];B[fb];W[gc]
(;B[dc];W[cd]
(;B[ed]
(;W[cr];B[ec];W[df];B[ef];W[dg];B[cm];W[dn];B[bl];W[bq]
(;B[ap];W[kq]
(;B[kp]
C[If White plays on the right, Black will invade the lower side. If White plays on the left, Black will build up the Black moyo on the right. ]
(;W[pp]
C[White answers Black's probe with a White probe. If Black answers towards the corner, White will try to connect up to the White stone on the side. ]
(;B[qq];W[lq]
(;B[op];W[jp];B[ok]
C[While this sequence in the lower right looked a boit random at first, it turned out that each move had a logical reason, with threats and counter-threats. ]
;W[rc];B[br]
(;W[dm];B[mo];W[mm];B[jo];W[ip];B[ko];W[io];B[jm];W[lk]
(;B[nl];W[pj];B[oj];W[cl];B[bm]
(;W[of]
C[White starts by letting Black capture with a net...];B[pg];W[pm];B[pk]
;W[lh]LB[pm:A][lh:B]
C[and now White has played two useful forcing moves from outside at A and B. ]
;B[mg];W[no];B[np];W[km];B[kl];W[jl]
C[White not only connects the loose stones on the right, but is also fixing it's shape in the center. ]
;B[lm];W[kk];B[kn];W[ml]LB[mn:A][nn:B]
C[White has forcing moves at A or B, and Black has no good way to take territory on the right. ]
;B[dr];W[er];B[il];W[jk];B[bc];W[nm];B[rd];W[in];B[im];W[mp]
C[White starts to attack. ]
(;B[nn];W[mn];B[oo];W[lo]
C[Black's group in the center is cut off with a ko. ];B[ik];W[no];B[fk];W[ni]
;B[oi];W[ck];B[mo];W[cc];B[cb];W[no];B[hh];W[fi];B[mo];W[bb];B[gi];W[fh]
;B[ba];W[ii];B[fj];W[hj];B[ij];W[hi];B[lp];W[no];B[ji];W[ih];B[mo];W[ca]
;B[mq];W[db];B[hc]
(;W[fe];B[gb];W[ic];B[id];W[ib];B[hb];W[ge];B[kg]
(;W[kh];B[kc];W[kb];B[jd];W[jc]
(;B[ee];W[jg];B[he];W[gf];B[if]
(;W[hg]
C[White could not succeed in killing the Black group. See two variations for White 148]
;B[ha]
(;W[lc];B[je];W[on];B[jj];W[mh];B[cs];W[gl];B[gm];W[fm];B[hn];W[bk];B[mk]
;W[mj];B[nj];W[nk];B[oc];W[ob];B[mk];W[pf];B[rf];W[nk];B[nb];W[pb];B[mk]
;W[lg];B[nh];W[nk];B[fq];W[gp];B[eq];W[hr];B[gq];W[gn];B[mi];W[lj];B[hm]
;W[mr];B[nr];W[fl];B[hq];W[iq];B[gr];W[ir];B[lr];W[kr];B[ol];W[no];B[ms]
;W[go];B[nn];W[qf];B[rg];W[no];B[li];W[ki];B[nn];W[qn];B[kd];W[no];B[md]
;W[mc];B[nn];W[om];B[ro];W[rl];B[ak];W[al];B[aj];W[ai];B[bj];W[bi];B[fg]
;W[gg];B[ld];W[mb];B[jf];W[kg];B[cj];W[dj];B[eg];W[eh];B[ka];W[rj];B[hk]
;W[gk];B[rk];W[sk];B[sc];W[sb];B[sd];W[jb];B[ia];W[na];B[ja];W[lb];B[ig]
;W[jh];B[ni];W[kj];B[ci];W[ch];B[di];W[ei];B[am];W[dh]
(;B[ao]
C[The variation for Black 255 shows what I think is a normal endgame, ending in a half point win for White. ]
;W[al];B[qj];W[ri];B[ea];W[qo];B[rp];W[ql])
(;B[rn];W[rm];B[ri];W[qo];B[qp];W[qj];B[si];W[sj];B[rb];W[qb];B[sa];W[ln]
;B[la];W[ma];B[de];W[ce];B[po];W[rp];B[rq];W[sn];B[sp];W[no];B[mp];W[gs]
;B[fs];W[hs];B[qi];W[ep];B[pi];W[fp];B[es];W[sl];B[qa];W[pa];B[ks];W[js]
;B[ls];W[ea];B[fa];W[mk];B[bo];W[al];B[ak];W[aj];B[al];W[nn];B[so];W[sm]
;B[sb];W[cb];B[ra];W[da]
C[W+0.25 (1.5)]))
(;W[kd];B[lc];W[lb];B[jb];W[ja];B[ia];W[jb];B[oc];W[ob];B[mb]LB[kd:A]
C[Cutting at A leaves this hole in the White territory. ]))
(;W[je];B[gd];W[fd];B[gg])
(;W[gd];B[gg];W[fg];B[ig];W[gh];B[hg];W[ff];B[jh]))
(;B[jh];W[jg];B[ig];W[lg];B[jf];W[kg];B[hg];W[ie];B[kd];W[lc];B[je];W[hd]
;B[if];W[gg];B[he];W[gd];B[ld];W[mc];B[jj];W[md];B[mj];W[ki];B[mk];W[ll]
;B[kj];W[lj];B[mi];W[li];B[om]LB[jh:A]
C[
I was thinking that pushing through at A was the mainline here, but White seems to have a small lead. ]
;W[ds];B[gh];W[sd];B[se];W[sc];B[re];W[bk];B[fg];W[ee];B[gn]
C[very close-W+0.5 ?]))
(;W[jg];B[kc];W[jc];B[kh];W[oc]LB[mb:A];B[bk]TR[jk:lk]LB[oc:A][mb:B]
C[White needed to protect at A to prevent a Black move at B. The marked White group was bigger than the Black group on the top and Black has a small lead. ]
))
(;W[hb];B[gb];W[ib];B[ic];W[jc];B[jd];W[kc];B[he];W[if];B[ie];W[je];B[hg]
LB[fg:A][ig:B]
C[Black can play at A or B next, and it looks like Black is ok here. ]))
(;B[lp];W[mq];B[nn];W[oo];B[on];W[po];B[mn];W[oq]
C[Black has saved it's group in the center, but the cost was too high. ]
))
(;W[qh];B[of];W[oi];B[ni];W[qj];B[pk];W[rg];B[in]
C[This also looks feasible for White. ]))
(;B[in]
C[This seems to be a natural move. ]))
(;W[ar];B[bs];W[cs];B[dr];W[as];B[er];W[fq];B[fr];W[gr];B[gq]TR[cn:dn][do:dq]
C[The marked stones are short of liberties, and Whhite wont be able to handle this. ]
))
(;B[ip];W[op];B[oq];W[mo]TR[pp][qq];B[ro];W[bc]
C[In this variation, the marked exchange has allowed White to press down on Black and reduce the value of Black's right side area. ]
))
(;B[oq];W[jp];B[lq];W[jq];B[lp];W[qp];B[qq];W[qm]TR[pp][oq]
C[In this variation, the marked exchange gave White some extra space on the right, so White could take the lower side and then invade on the right. ]
))
(;W[lp];B[jq];W[lq];B[jp];W[ln];B[er];W[dr];B[fq]
C[Black has a good position on the lower side with minimal damage on the right. ]
)
(;W[jp];B[lq];W[jq];B[lp];W[jn];B[ok]
C[Black has expanded the Black moyo on the right]))
(;B[po];W[ko]LB[ko:A]
C[Jumping at A is a big move that expands White's area on the lower side while reducing Black's right side. ]
))
(;B[bp];W[ap];B[bo];W[kq]
C[It is better for Black to play as in this diagram. ]))
(;W[ec];B[cc];W[gb];B[bd];W[be];B[bc];W[cf];B[cm];W[dn];B[bl]TR[ed]
C[Black played the marked stone, inviting White to cut. In this variation, the Black stone still has some aji. ]
))
(;B[cc];W[gb];B[cm];W[dn];B[bl];W[bd];B[bc];W[ec];B[ba]LB[gb:A]
C[White A was an important point. The following forcing moves give White a thick shape. ]
))
(;B[cc];W[cd];B[bc];W[gb];B[bd];W[rd];B[oc];W[ob];B[nb];W[pb];B[re];W[rc]
;B[of];W[po]LB[cc:A]
C[While it might seem natural for Black to play at A, that would give White sente to move to the right. ]
))
(;B[cm];W[dn];B[cr];W[ec];B[ip];W[dg]TR[ec]
C[The marked stone is a vital point that secures a White territory on the upper side. ]
))
(;B[oc];W[ob];B[pb];W[qb];B[nb];W[pa];B[ne];W[ld]TR[od:qd]
C[While Black had the option of pushing through to cut on the second line, the drawback is that Black's marked wall now has a shortage of liberties. ]
))
(;W[mb];B[me]
C[If White protects at 1, Black 2 is a big move. ]))

