(;CA[utf-8]OT[0 none]RU[Japanese]FF[4]AP[MultiGo:4.4.4]SZ[19]GM[1]GN[190801Otake]
DT[2019-12-09]PC[https\://online-go.com/review/430352]PB[Otake Hideo]BR[9d]PW[Michael Redmond]
WR[9d]KM[6.5]TM[0]RE[r]MULTIGOGM[0]
;B[qd];W[dp];B[pq];W[dd];B[fc];W[oc]LB[qo:A]C[This game starts with the same opening as my game against Ishida Yoshio one week before. As I played, I recalled that Leela had suggested the approach move at A instead of White 6, but since the difference was small I chose the game move. When using computer programs to study, I think it is important to favor moves that I like rather than blindly copying the computer move. ]
;B[cf]
(;W[df]C[In my game against Ishida, I played an attachment on the other side with White 8. See the variation for the opening moves of that game. ]
;B[dg];W[ef]
(;B[ce]C[The variation shows Black attaching, the more popular move recently. ]
;W[cd];B[gd]
(;W[eb]C[I played 14 here to avoid the more common joseki sequence shown as a variation, and with the idea to make miai of the left and upper sides. ]
;B[kc];W[di];B[eg];W[gf];B[fg];W[ge]
(;B[ch]C[Black 21 is an important move that gives Black an eye on the side. ];W[ic]
;B[hd];W[jd];B[de]
(;W[ee]C[I went wrong with this move. I should have allowed Black to connect on dame points as in the variation. ]
;B[ed];W[ec];B[fd];W[if];B[cb]C[The vital point.];W[dc];B[fb];W[bc];B[bb];W[be]
;B[bf];W[ab];B[ae];W[bd];B[fa];W[ea]
(;B[ib]C[The variation for Black 43 shows a ko that can happen in the corner. ]
(;W[kd]C[The variation for White 44 shows how Whitte can make a seki in the corner. ]
;B[jb];W[lc];B[lb];W[jc];B[kb]TR[gb][hb]C[With a boundary on the marked points, Black has a living shape on the side. ]
;W[pe];B[qe];W[pg];B[pf]TR[mc][ie]C[White is playing towards the center to relieve the pressure of weaknesses on the marked points. ]
;W[of];B[qf];W[og];B[qh];W[ci];B[fi];W[cm]LB[hh:A]C[Leela suggested White A, which would have given me a stronger position in the center. ]
;B[hh];W[ih]TR[gf][ge][ee][ef][df]C[With White 62 I have already decided to sac the marked stones and go for fast developement. ]
;B[ii]
(;W[ji]TR[gf][ge][ef][ee][df]C[Offering to give Black the marked stones. I did not have much of an attack in any case (see var). ]
;B[ig];W[jh];B[hg];W[jg]
(;B[mc]C[Two variations for Black 69 are added to show Black attacking the weakness in White's connection. ]
;W[qo]
(;B[me]SQ[og][jg]C[Black has added two extra stones to his living group on the upper side with 69 and 71. While these are slow moves, they will be very powerful if Black can launch an attack against the two marked White groups. ]
;W[ij];B[hi];W[np];B[po];W[pn];B[oo];W[qp]
(;B[oq]C[There is a ladder involved if Black covers in the corner with 79 (see var). ]
;W[qq];B[kq];W[nm];B[no];W[lp];B[lq];W[qj]LB[ie:A]C[With this move, White A was a big move that would have put some pressure on Black's group on the left, and made it easier for me to finish the left side territory. ]
;B[cq];W[cp];B[dq];W[eq];B[er];W[fr];B[fq];W[ep];B[gr];W[dr];B[fs];W[cr];B[ie]C[Black 99 was a big move that gave Black a small advantage. ]
;W[jf];B[hf];W[go];B[lf]LB[od:A]C[Black 103 was a mistake that lost the advantage. Black should have played at A to capture the UR corner area.  ]
;W[hq];B[iq];W[ip];B[ir];W[qc]C[White 108 starts a sequence that connects White's group while keeping the initiative. ]
;B[rc]TR[cr];W[qg];B[rg];W[pd];B[qb];W[pc];B[re];W[ri];B[rh];W[oi]C[White links up to create some increased potential on the right and in the center. ]
;B[ne];W[oe];B[qi];W[rj];B[mh]C[At this point, I am already short of time, so the rest of this game was played in overtime, one minute for each move. ]
;W[mg]
(;B[mm]LB[mg:A]C[The variatin for Black 125 shows the fight if Black covers at the left of A, and how White plans to deal with that. ]
;W[lg];B[om];W[on];B[nn];W[nl];B[ml];W[ol];B[jp];W[jo];B[io];W[in];B[hp];W[ko];B[mk]
;W[jm]TR[mn]C[White is threatening to cut at the marked point];B[oj]
(;W[pj]TR[ol][nl][nm]C[White must play carefully to protect the marked stones (see var). ]
;B[nj];W[pm];B[pi];W[ni];B[mi];W[nh];B[ln];W[lj];B[mj];W[kf]
(;B[il]C[There is a diagram added to show how White can lived if surrounded. ];W[hm]
;B[fl];W[gk]
(;B[hj]C[Black 157 was an overplay, and I could have called his bluff. ]
(;W[hk]C[I missed an opportunity to surround the left on a large scale, for a big win (see var). ]
;B[fk]TR[ik]C[Now Black theatens the marked cut. ];W[ik];B[bq];W[br];B[ck];W[dk]
;B[cj];W[dj];B[bi];W[bl]C[Black now has a lead. ];B[kk];W[kl];B[kj];W[ki];B[lk]
;W[pb];B[rb];W[gp];B[em];W[cl];B[bk];W[ak];B[bj];W[dm];B[qr];W[rr];B[pr];W[gq];B[hr]
;W[mq];B[mr];W[rs];B[ek];W[dl]
(;B[jl]TR[jj]C[Black threatens the marked cut, which is forcing against White's group on top. The variation fdor Black 193 shows the correct endgame sequence for Black to reduce White's territory on the right side. ]
;W[nb]
(;B[mb]C[With time pressure during the game, I was not making a precise calculation, but it turns out my feeling for the score was about right. I added a number of variations in my post-mortem of the game, trying to calculate the endgame. Hoping that players interested in the endgame might benefit from my attempts, I left these variations in with finishing comments giving the point score. The first var is for Black 195, the correct move being to capture one stone, and with Black winning by 2.5. ]
;W[fm]TR[jj]C[The White group in the upper right/center is alive as it stands, so the marked cut is not sente, and White can play the most aggressive move with 196.]
;B[bp]
(;W[bo]TR[bo][bp]C[The marked exchange sets up a tactic for Black. I added an endgame variation for 198, which is a win for Black. ]
;B[en];W[el];B[fo];W[gl];B[fp];W[ho];B[fn];W[gm]TR[ek][fk][fl][io][hp]C[White is threatening two captures (marked). ]
;B[ei];W[kn];B[jk];W[ip]
(;B[kp]C[Both the variation and the mainline for Black 211 should end in a half point victory for Black. ]
;W[lo];B[nq]TR[mq];W[hc]
(;B[hb]C[While the variation for 215 ends in a half point victory for Black, the game variation is less clear. ]
;W[si]
(;B[aa]C[Black's losing move was either 215 or 217, and I did not fully analise that. I made a variation for 217 that ended in a half point win for Black, but it was not accurate. I left it as it is, so endgame fans are invited to find the mistakes. ]
;W[ac];B[ca]C[It should be noted that I mostly ignored this ko in my endgame studies. Black usually does not have enough threats to win this ko, and the only issue is that White might need to erase ko threats with point losing moves. It was premature for Black to start this ko now.]
;W[mp]TR[lr]C[Not only is 220 a big move, it creates three ko threats with the marked cut, giving me some extra safety in the ko fight. ]
(;B[af]C[The variation for 221 shows that White is now ahead in territory. ];W[dn]
;B[ds];W[ar];B[lh];W[ld];B[nc];W[jj];B[bh];W[sh];B[sg];W[ok];B[aj];W[al];B[qs];W[li]
;B[ad];W[ph];B[na];W[ob];B[gj];W[qa];B[ra];W[gc];B[nf];W[ng];B[gb];W[id];B[he];W[oa]
;B[ma];W[dh];B[ej];W[eh];B[fh];W[kh];B[pp];W[le];B[mf];W[je];B[gn];W[cs];B[db];W[ba]
;B[ll];W[km];B[aa];W[es]
(;B[fr]C[The variation for 269 shows how the game might have ended. ];W[ba]C[Black resigned.])
(;B[im];W[hn];B[fr]TR[im][hn]C[The marked exchange was meaningless but was added to make this sub-variation separate from the game. ]
;W[ba];B[do];W[co];B[eo];W[qn];B[pa];W[ds];B[qa];W[nd];B[md];W[od];B[aa];W[mo];B[mn]
;W[lm];B[ba]C[W+3.5
]))
(;B[dn];W[cn];B[ds];W[ar];B[lh];W[ld];B[nc];W[jj];B[na];W[ob];B[je];W[ke];B[nf]
;W[ng];B[kh];W[kg];B[bh];W[gj];B[gi];W[sh];B[sg];W[qs];B[ps];W[dh];B[aj];W[al];B[eh]
;W[gc];B[gb];W[id];B[he];W[qa];B[ra];W[li];B[ok];W[pk];B[cs];W[bs];B[es];W[ph];B[gn]
;W[pa];B[ba];W[im];B[eo];W[co];B[af];W[od];B[ma];W[km]C[W+1.5
]))
(;B[dn];W[cn];B[ds];W[ar];B[nf];W[ng];B[mp];W[mo];B[mn];W[ld];B[nc];W[lh];B[je]
;W[ke];B[na];W[ob];B[ph];W[jj];B[op];W[sh];B[sg];W[qa];B[ra];W[gc];B[gb];W[id];B[he]
;W[gj];B[gi];W[dh];B[bh];W[eh];B[aj];W[al];B[fh];W[qs];B[ps];W[ca];B[ba];W[da];B[ok]
;W[pk];B[li];W[cs];B[es];W[gn];B[pa];W[oa];B[ma];W[co];B[qa];W[ad];B[af];W[km];B[fr]
C[B+0.5
]))
(;B[si];W[hb];B[ha];W[sj];B[pk];W[qk];B[ok];W[pl];B[dn];W[cn];B[ds];W[ar];B[lh]
;W[ld];B[nc];W[jj];B[na];W[ob];B[mp];W[mo];B[mn];W[sh];B[sg];W[qa];B[ra];W[gb];B[ga]
;W[id];B[he];W[gj];B[gi];W[dh];B[bh];W[eh];B[fh];W[qs];B[ps];W[cs];B[op];W[es];B[fr]
;W[li];B[nf];W[ng];B[kh];W[kg];B[aj];W[al];B[ph];W[gn];B[je];W[ke];B[pa];W[oa];B[ma]
;W[ca];B[ba];W[da];B[qa];W[si];B[ad];W[ac];B[af];W[ds];B[lm];W[km];B[nd]C[B+0.5
]))
(;B[si];W[sj];B[pk];W[qk];B[ok];W[pl];B[dn];W[cn];B[ds];W[ar];B[hc];W[kp];B[nq]
;W[jq];B[jr];W[mp];B[li];W[qs];B[ps];W[sh];B[sg];W[ld];B[nc];W[lh];B[na];W[ob];B[je]
;W[ke];B[nf];W[ng];B[ph];W[id];B[he];W[jj];B[aj];W[al];B[bh];W[qa];B[ra];W[gj];B[gi]
;W[dh];B[eh];W[cs];B[es];W[gn];B[pa];W[oa];B[ma];W[ca];B[ba];W[da];B[qa];W[si];B[ad]
;W[ac];B[af];W[ej];B[fj];W[co];B[do];W[eo];B[fr];W[jp];B[lm];W[km];B[mn];W[mo];B[lo]
;W[ll];B[im];W[hl];B[nk];W[pp];B[op];W[mf];B[le];W[md];B[nd];W[oh];B[od]C[B+0.5
]))
(;W[co];B[gm];W[fn];B[gl];W[hl];B[gn];W[en];B[hn];W[jj];B[jk];W[im];B[kn];W[ho]
;B[ip];W[jn];B[lh];W[le];B[nc];W[mf];B[je];W[ke];B[nf];W[ng];B[si];W[sj];B[pk];W[qk]
;B[ok];W[pl];B[kh];W[ph];B[kg];W[oa];B[ma];W[na];B[qa];W[pa];B[ds];W[bs];B[hc];W[sh]
;B[sg];W[gj];B[ei];W[fp]TR[co][bp];B[fr];W[km];B[nq];W[mp];B[ld];W[nd];B[md];W[id]
;B[he];W[qs];B[ps];W[aj];B[ai];W[al];B[bh];W[gi];B[gh];W[el];B[dh];W[li];B[od];W[si]
;B[nd];W[bo];B[es];W[ca];B[ba];W[da];B[ad];W[ac];B[af];W[pp];B[op];W[mo];B[mn];W[lm]
;B[ll];W[lo];B[kp];W[ap];B[cs];W[nk];B[fj];W[ej]C[B+1.5
]))
(;B[ld]
(;W[gm];B[en];W[kn];B[jk];W[hc];B[hb];W[si];B[dn];W[cn];B[ds];W[bs];B[nq];W[mp]
;B[do];W[co];B[mb];W[sh];B[sg];W[gc];B[gb];W[id];B[he];W[gj];B[ei];W[gi];B[gh];W[dh]
;B[bh];W[eh];B[fh];W[ho];B[ip];W[fp];B[fr];W[im];B[fn];W[gn];B[li];W[lh];B[nf];W[ng]
;B[pa];W[oa];B[qa];W[nc];B[nd];W[ma];B[la];W[qs];B[ps];W[na];B[ok];W[pk];B[aj];W[al]
;B[ph];W[kp];B[mn];W[km];B[el];W[fj];B[ej];W[bp];B[es];W[pp];B[op];W[ad];B[af];W[ca]
;B[ba];W[da];B[le];W[je];B[hl];W[gl];B[aa];W[ac]C[B+2.5
])
(;W[fm];B[gm];W[fn]
(;B[hl])
(;B[jj];W[gl];B[nf];W[ng];B[lh];W[ph];B[oa])
(;B[gl];W[hl];B[jj]
(;W[gn];B[nf])
(;W[lh];B[gn];W[ho];B[ip];W[hn];B[fo])))))
(;B[si];W[sj];B[pk];W[qk];B[ok];W[pl]))
(;W[ej];B[hk];W[hl];B[kh];W[jk];B[ki];W[le];B[mf];W[kg];B[jl];W[pb];B[rb];W[ld]
;B[nc];W[je];B[ph];W[nb];B[mb];W[oa]C[White is alive. ]))
(;B[fk];W[dk]C[Playing this way, White has a small lead. ]))
(;AB[jj];AB[jk];AB[lh];B[kj];W[pb]
(;B[rb];W[le];B[mf];W[ld];B[nc];W[je];B[ph];W[nb];B[mb];W[oa]LB[le:A]C[This variation is to demonstrate that White can live with A if cut off from the center. ])
(;B[je];W[ke];B[rb];W[le];B[mf];W[nd];B[md];W[nc];B[ph];W[nb])))
(;W[ni];B[pm];W[qn];B[pl]C[Black captures three stones. ]))
(;B[lg];W[lh];B[li];W[kh]
(;B[ng];W[mi];B[mf];W[nh])
(;B[mi];W[mf]TR[le]C[With a cut at the marked point, this fight in the center favors White. ])))
(;B[qq];W[pp];B[op];W[oq];B[nq];W[or];B[nr];W[no]LB[pp:A]C[While this variation over-simplifies, it demonstrates the decisive ladder. When this ladder favors White, the fight after White A is difficult for Black. ]))
(;B[ie];W[hf];B[jf];W[je];B[kf];W[lf];B[kg];W[lh];B[le];W[ke];B[lg];W[mg];B[mf]
;W[kh];B[lf]TR[gf][ge][ef][ee][df]LB[mc:A][ie:B]C[With the stone at A, Black B is now effective. White's squeeze fails here, so White will simply play away and sac the marked stones after Black B. ]))
(;B[hf];W[ie];B[he];W[qo]TR[lg][cm][qo]C[While Black has captured some White stone for a 20+ territory in the upper left, White has some potential territory in the marked area, and has played two important opening pointswith the marked moves. ])
(;B[ie];W[hf];B[jf];W[je];B[kf];W[lf];B[kg];W[lh];B[le];W[ke];B[lg];W[mg];B[mf]
;W[kh];B[lf];W[ld];B[ng];W[nf];B[mh];W[me];B[mg];W[mi]LB[ie:A]C[This variation is mostly to demonstrate that Black A is not possible yet. Obviously Black does not want to play this way. ]))
(;W[jh];B[ji];W[hg];B[hi];W[kh];B[lj]C[Black has a good position in the center.]))
(;W[ca];B[ba];W[da]C[This creates a seki, erasing the possibility of a ko in this corner. Since the threatened ko takes a lot of moves for Black to succeed, White should not be overly worried, so making this seki is actually a small move that might even wait until the dame filling stage of a game.]))
(;B[aa];W[ac];B[ca];W[kd]C[While Black has a ko in the corner, it will take 5 more moves to finish White off, and is just not worth it for Black. This ko must wait for the last stage of the endgame before it is ready to happen. ]))
(;W[ed];B[fe];W[if];B[fd];W[pe];B[qe];W[pf];B[qg];W[le]C[Good for White.]))
(;B[id];W[ch];B[cg];W[ec]C[Black does not have eyeshape, and this favors White. ]))
(;W[ec];B[eb];W[fd];B[fb];W[db];B[gf];W[fg];B[ci];W[be];B[lc]
(;W[ck];B[bf]LB[lc:A]C[With Black A being a powerful pincer/extension, this variation favors Black. ])
(;W[bf];B[cl])))
(;B[cd];W[cc];B[ce];W[dc];B[ic];W[hd];B[hc];W[di];B[eg];W[fd];B[ch];W[kc];B[id]
;W[gd];B[ec];W[ed];B[if];W[fg]LB[cd:A]C[This variation shows what might have happened if Black had played the more popular attachment at A. ]))
(;W[fd];B[gd];W[fe];B[cc];W[ec];B[cd];W[gc];B[mc];W[md];B[ld];W[pe];B[qe];W[pf]
;B[qf];W[pg];B[qh];W[me];B[jc];W[le];B[fb];W[hd];B[eb];W[kd];B[gb];W[ge];B[ic];W[qo]
C[I made a agj/youtube commentary for this game against Ishida Yoshio on July 25, 2019.]))