(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]SZ[19]KM[0.00]GN[ ]PW[Sarah Yu]PB[Sorin Gherman]C[Commentary by Myungwan Kim 9p]RE[W+Resign]FG[259:]PM[2]PC[San Diego, CA]DT[2017-08-08]EV[US Go Congress 2017, Masters]RO[5]WR[6d]BR[7d]GC[Sarah Yu http://agagd.usgo.org/player/22637/];B[pd];W[dd];B[pp];W[dp];B[fq];W[cn];B[fc];W[df];B[jd];W[qf]
;B[qh];W[nq];B[pn];W[jp];B[dq];W[cq];B[cr];W[qc]
(;B[pc]C[Better to block on the other side, and take sente to play in the lower-left first.];W[qd];B[pe];W[rf];B[cp]
(;W[pf];B[bq]
(;W[lc];B[le]
;W[hc]C[Bad, white is hurting the other white stone.];B[jb];W[me];B[md];W[ld];B[mc];W[ke];B[lf];W[kd];B[lb];W[he]
;B[kc]C[Black is good.];W[kf];B[kg];W[lg];B[mf];W[jf];B[kh];W[qj];B[if];W[jg];B[ie]
;W[qq];B[pq]
;W[pr]LB[qp:A][or:B]C[Where should black play next: A, B?]
(;B[qp]C[Very bad, black  blocks on the small side, letting white get strong on the lower side where black had the opportunity to attack.];W[rr];B[rq];W[qr]
;B[ql]C[White's corner is much larger than black's territory on the side, in the lower-right area.

I thought I played safe since I was ahead, but Myungwan pointed out: 

1) this is not "safe", just small; "safe" is when one's groups are weak
2) black is not really ahead to start with, just in a better position, and that advantage can go away quickly with such slack moves.]
(;W[mg];B[nf];W[ng]
(;B[og];W[of];B[ne];W[oh];B[ii];W[pl]
(;B[jh];W[qm];B[pm];W[rl];B[ol];W[qk];B[nm]
;W[ck]C[White is winning already after this, the right side became very large.]
(;B[cc]C[Largest move.];W[dc];B[db];W[cd];B[bb];W[bc];B[cb];W[fd];B[ec];W[gg];B[hf]
;W[gf];B[hd];W[gd];B[ge]
;W[fe]C[White is ahead. Myungwan commentary ended here.];B[dj];W[dk];B[ej];W[cj];B[dh];W[ci]
(;B[oj];W[iq];B[pi];W[rh];B[oq];W[or];B[np];W[mp];B[mq];W[nr]
;B[mo]LB[lp:A]C[My opponent suggested trying black A instead.];W[lp];B[qi];W[ri];B[pg];W[ok]
(;B[nk]LB[nj:A]C[My opponent suggested black A instead to capture the three white stones above, and gamble the game on saving black's group below.
During the game I was still optimistic about black's overall position, and I thought I don't need to risk that, I was wrong.];W[qg];B[pk];W[oi];B[pj];W[ph];B[fh];W[ch];B[gc]
;W[hh]C[I think I made a big mistake next - where should black respond?]
(;B[hg]LB[hi:A]C[From post-game analysis using Leela, it looks like A is a better option for black. See the variation.];W[gh];B[gj];W[hj];B[hi];W[gi];B[gk];W[ih]
;B[ig]LB[ji:A]C[This shape is weak for black because of the cut at A.];W[nj];B[ql];W[pb];B[ob];W[pl];B[ok];W[he];B[dg];W[cg]
;B[jk]LB[no:A][oo:B]C[Not sure about the order of moves here anymore, A-B exchange may have already be made.];W[id];B[je];W[no]
;B[oo]LB[nn:A]C[This is bad, should be at A; after white goes out at A and wins the ko, black's position gets weak.];W[il];B[ik];W[hl];B[hk];W[nn];B[mn];W[op];B[qe];W[re];B[np]
;W[ji];B[ij];W[op];B[ql];W[mj];B[mk];W[pl];B[np];W[ek];B[fk]
;W[op];B[ql];W[np];B[ic]
;W[pl]C[The order towards the end is not accurate. Subsequent moves not recorded, black eventually resigned.])
(;B[hi]C[Leela's variation. It seems indeed better than the actual game!];W[nj];B[ql];W[he];B[id];W[pl];B[ok];W[gh];B[ih];W[gi];B[gj]
;W[fj];B[fk];W[fi];B[ek];W[gk];B[hj];W[gl];B[fm];W[gm];B[em]
;W[go];B[fo];W[gp];B[cm];W[bm];B[dn];W[cl];B[dg];W[cg];B[hr]
;W[ir];B[bd];W[be];B[ac];W[no];B[nn];W[lo];B[oo];W[pb];B[ob]
;W[qb];B[dm];W[co];B[do];W[bo];B[ef];W[ee];B[cf];W[de];B[ae]
;W[bf];B[il];W[gr];B[gq];W[hq];B[fr];W[hs];B[bp];W[im];B[ao]
;W[bn];B[jm];W[jn];B[kn];W[in];B[ko];W[ln];B[lm]
;W[kp]C[Leela's variation. The game seems quite close, as long as black makes points in the center.]))
(;B[nj];W[nk];B[mj];W[mk];B[lj]
;W[no]C[?]
(;B[nn];W[oo];B[op];W[lm];B[ln];W[kn])
(;B[oo]C[This way black has to fight a ko for this group's life.])))
(;B[lq]C[I think I should play here instead, to complicate the game.]))
(;B[ci]C[?]))
(;B[qk]C[Black should resist here, not allow the stone to be captured so easily by white.];W[pk];B[ig];W[qm]
;B[rm]C[Black should resist like this.])
(;B[ig]LB[jh:A][ki:B]C[Locally, this is the correct way to capture white. If white A, black B and whte cannot escape.]))
(;B[cj]
;W[cl]C[I asked "what if this"];B[ch]C[Myungwan suggested this reply as very large point.])
(;B[ck]
;W[ci]C[Because white's approach move is so good, black should think to play one point higher.]))
(;W[ck]
(;B[ii]LB[mg:A]C[I think I showed Myungwan this position next (wrong order of moves...).
He said that trying to capture directly is too small, suggested to play a thick move instead, at A. This is attacking white on a large scale, and decreasing white's potential on the left side. ])
(;B[mg])))
(;B[or]C[This is the correct side to block in this situation, to keep white's white side weak.];W[qr];B[oq];W[ro]
;B[np]C[Black should play this way to make use of his thickness.])
(;B[cj]LB[ch:D][ci:B][ck:A][cl:C]C[Globally, black should take advantage of sente and attack on the left side, instead of settling the lower-right corner.

If white replies at C, black plays D.

How to choose the exact point? If black at A instead for a tighter attack, white may be happy to play the perfect extension at B in reply.]))
(;W[nf];B[md];W[ql]))
(;W[bq]LB[do:A][ep:B]C[This did not happen in the game, but Myungwan discussed this possibility. Where should black play next: A or B?]
(;B[ep]C[This was my plan, and it is wrong: black is missing an opportunity here by playing too soft.];W[do]
(;B[br]
;W[bp]C[This is what I had in mind as follow up if white responded. This is not good enough for black, he missed opportunity here. See the variations ];B[aa];W[dr];B[eq];W[ar];B[er]
;W[hq]LB[gr:A]C[Black can be harassed, since he is lacking eye shape.])
(;B[er];W[br];B[bs]
;W[bp]C[This is better for black, compared to what I was planning to do, since he has eye-shape now.]))
(;B[do]C[Black should play severely like this.];W[ep];B[co];W[eq];B[dr];W[er]
;B[br]C[If this happens, this is good for black.])))
(;B[qd];W[pc]
(;B[od];W[rd];B[re];W[rc];B[qe];W[nc];B[cp])
(;B[oc]C[Better than the standard extension, since in this case black just wants to get sente.];W[rc];B[od];W[rd];B[cp])))
