(;SZ[19]GM[1]FF[4]ST[0]AP[GOWrite:3.0.15]CA[UTF-8]GN[ ]KM[7.5]RE[W+R]PM[2]PB[Sorin Gherman]FG[259:]HA[0]C[Comentary by Yamashiro Hiroshi 9p]PC[San Diego, CA]DT[2017-08-06]PW[Quan Sun]EV[US Go Congress 2017, Masters]RO[1]WR[7d]BR[7d]GC[Quan Sun http://agagd.usgo.org/player/22089/];B[pd];W[dd];B[qp];W[dq];B[dn];W[oq];B[cq];W[pn]
(;B[op];W[pp];B[po];W[pq];B[qo];W[oo];B[np];W[qq];B[qn];W[on]
;B[ql];W[mr]
(;B[dp];W[eq];B[cr];W[ep]
(;B[eo]C[Not good for black, white can profit from the forcing move in different ways.];W[gp];B[fo];W[hp]
(;B[mo]C[Bad!! These stones should be discarded.];W[ol];B[mm];W[qk];B[rk];W[pl];B[rm];W[qj];B[rj];W[ln];B[mn]
;W[mk]C[Last two moves show that the white player is very strong, Yamashiro said.];B[kl]
(;W[qi]L[kj]C[Bad for white, should continue the attack with A instead.]
(;B[lq]
;W[jp]C[Good move.];B[ko];W[mq];B[kq];W[jm];B[km];W[jn];B[kn];W[jr]
;B[lj]C[I was happy that I got the chance to play around this point first!]
(;W[mh]C[Yamashiro criticized this as too far, it gives black a chance to counterattack.];B[mj];W[nj];B[ni];W[mi]
(;B[nk]L[nh]C[Bad, this is black's chance to punish white's loose move and cut with A.];W[oj];B[nl];W[oh]
(;B[ok];W[nc]
(;B[ng];W[nh];B[pk];W[qf];B[pf];W[pe]
;B[nd]C[Yamashiro sensei liked this move very much, he called it "brilliant" :-)];W[qd]
(;B[oe]C[Bad move, it ruined the previous good move.];W[qe];B[pg];W[pc];B[qg];W[qh];B[rg];W[od];B[ne];W[mf]
(;B[nf]L[ld]C[Bad - Yamashiro suggested to resist with A.];W[og];B[of];W[ld];B[mg];W[kj];B[lk];W[kg];B[kf];W[lg];B[lf]
;W[jf];B[jg];W[kh];B[je];W[if];B[ke];W[md];B[me];W[ie];B[kc]
;W[ic];B[mc];W[lc];B[mb];W[kb];B[nb];W[oc];B[jc];W[lb];B[jb]
;W[hb];B[sg];W[cp];B[do];W[bp];B[bo];W[cl];B[bm];W[ce];B[ig]
;W[hg];B[id];W[hd];B[kd];W[ih];B[dk];W[di];B[ck];W[bj];B[ob]
;W[pb];B[le];W[oa];B[ka];W[bk];B[bl];W[ek];B[dl];W[dj];B[sd]
;W[se];B[rc];W[rd];B[sc]
;W[qc]C[Black resigned.])
(;B[ld];W[of];B[og];W[nf]
;B[mg]L[md][lg]C[If white captures 3 stones with A next, black can aim at white's lower group (with B or so).]))
(;B[oc];W[mc]
;B[qc]L[oe][qe][rc]C[This is why A-B is very bad exchange for black: without the B stone in place, white cannot easily play C now.]))
(;B[pj]C[Yamashiro suggested this move as very large, to take advantage of white's tenuki.]))
(;B[nc]))
(;B[nh]C[Black should play here and fight, might result in a semeai that black wins.];W[ng];B[ph];W[og];B[pi]
(;W[qf];B[qh];W[ri];B[rh];W[si]
(;B[rf];W[qe];B[re];W[qd];B[rd];W[qc];B[pj]
(;W[pk])
(;W[oh];B[oi];W[pk];B[rc]
;W[rb]C[Black should be able to win this semeai.]))
(;B[oj]C[Yamashiro didn't mention this, but this seems to be another way for black to win this fight quickly.];W[nk];B[ok];W[nl];B[pk]))
(;W[qg];B[qh];W[rh];B[ri];W[pg]
(;B[rg];W[oi])
(;B[oj];W[nk];B[rg]))))
(;W[ni]C[White should play here, proper move.]))
(;B[jp]C[More aggressive for black.]))
(;W[kj]C[White should continue the attack.]))
(;B[pm]C[Black definitely wants to sacrifice those stones\; white is strong everywhere, so rescuing them doesn't create a threat for white.]))
(;B[do]C[This is better for black.]
(;W[mo]
;B[hp]C[Normal, black should not be afraid to throw away the two cutting stones.])
(;W[ip]
;B[pm]C[Black treats the two stones lightly, no reason to rescue them.])))
(;B[lp])
(;B[dp]))
(;B[dp];W[pp];B[eq];W[qq]
;B[jq]C[I thought about something like this, but since the position is almost symmetrical I thought this would be uninteresting during the game.
Looking back at this, I think black should consider playing it, since in fact white's corner is weaker than black's corner.])
(;B[qo]
;W[oo]C[Variation suggested by my opponent after the game.];B[qm];W[cr];B[cp];W[gq])
(;B[po];W[oo];B[qn];W[pm];B[qm];W[pl];B[ql];W[pk]
;B[qj]C[Variation suggested by my opponent.]))
