(;GM[1]FF[4]CA[UTF-8]AP[WebGoBoard:0.10.11]ST[2]RU[AGA]SZ[19]KM[7.5]HA[0]TM[90 + 5 * 30]RE[B+11.5]GN[Dave Whipp Vs Yoko Ohashi]DT[2018-07-26]PB[大橋洋子]BR[6K]PW[Dave Whipp]WR[7K]EV[2018 US Open]RO[4]PC[Williamsburg];B[pd]C[Comments and variations added (by Dave Whipp) after review by Stephanie Yin, 1P];W[dd];B[pq];W[dp];B[qn](;W[kp]C[Consider playing low here; but high is OK];B[cn];W[fp];B[fc];W[qf];B[qh];W[qc];B[qd];W[pc];B[od];W[rd];B[re];W[rc];B[rf];W[nc];B[cf];W[fd]C[Correct direction: force black to be strong on the less important side];B[gd];W[fe];B[ec];W[dc];B[ic];W[ce];B[df](;W[de]C[solid connection marginally better than bamboo here. But this is fine];B[cj](;W[nq]C[Of the two remaining points, this is the bigger, because of the follow-up against the corner (3-3 invasion)];B[lc];W[mc];B[pk](;W[dk]C[Probably more urgent to take the corner.];B[dj];W[ek];B[ck];W[ej];B[iq];W[jq]C[Kick is correct in this position];B[ip];W[jn];B[in];W[im];B[hn](;W[en]C[Not terrible; but attach would be sharper];B[hm];W[jm](;B[gl]C[Probably a mistake by black: White should now aim to seal in black](;W[gq];B[gj];W[ei];B[bf](;W[gi]C[Wrong direction: this pushes black towards the right];B[ik];W[jk];B[jj];W[kk];B[hi];W[gh];B[hh];W[hg];B[ig];W[jd];B[jc];W[ld];B[kd];W[ke];B[kc];W[if];B[hf];W[gg];B[jg];W[he];B[hd](;W[lf]C[Continuing this attack doesn't really yield profit](;B[lq]C[Black is being greedy: probably enough to just secure the corner];W[jr];B[nr];W[or];B[oq];W[mr];B[np];W[mq];B[mp];W[lp];B[pr];W[ns];B[mk]C[It is becoming urgent to reduce the right side];W[kj];B[ji];W[bo]C[OK to do this before reducing the right: it's big; and ends up being sente];B[co];W[cp];B[bn]C[reverse sente .. so tenuki];W[pi];B[ph];W[oi];B[mi];W[nh];B[me];W[mg]C[Gomoku!

Connected; so first half of the reduction is a success. Now need to reduce the other half...];B[qi];W[jf]C[necessary!];B[kg];W[oo];B[mn];W[ok];B[ol];W[pj];B[qk];W[qj];B[rj];W[rk]C[tesuji!];B[rl];W[pl];B[ql];W[nl];B[om](;W[nm]C[This move was essentially a misclick! I had been reading a bunch of sequences; decided to connect; but then my hand played this one. Fortunately, the complicated variation -- that I'd rejected because I wasn't convinced that I'd read it correctly -- turned out to be not-terrible.];B[nk];W[on];B[pm];W[mm];B[nn];W[ln];B[lm];W[mo];B[ml];W[no];B[op];W[po];B[qp];W[ne];B[nd];W[of];B[qg];W[md];B[pf];W[be];B[ae];W[ad];B[af];W[bb];B[dh];W[bp];B[nf];W[an];B[am];W[ao];B[cm];W[db];B[eb];W[mf];B[oe];W[il];B[hk];W[ps];B[qs];W[lr]C[I thought I had enough ko threats for this smallish ko; but I hadn't noticed a critical weakness...];B[kn]C[I need to pay more attention to my connections! fortunately there was a trade available.](;W[jo];B[lo];W[io];B[ho];W[hp];B[ff];W[os];B[oc];W[ob];B[mb];W[nb];B[lb];W[qr];B[qq];W[rr];B[rq];W[ge];B[dl];W[eh];B[eg];W[el];B[sr];W[rs];B[ni];W[oh];B[oj];W[ea];B[fa];W[da];B[gb];W[di];B[ci];W[dm];B[cl];W[lh];B[ki](;W[og]C[I regretted this immediately: disconnecting black would have been much bigger! This might be big enough to have cost the game!];B[li];W[fg];B[ch];W[id];B[ne];W[mh];B[le];W[kf];B[na];W[pb];B[sd];W[sc];B[se];W[qa];B[oa];W[rb];B[fm];W[fn];B[ef];W[gf];B[kl];W[km];B[lk];W[kh];B[jh];W[go];B[fj];W[fk];B[hl];W[fi];B[lj];W[ko];B[ln];W[jl];B[do];W[eo];B[em];W[dn];B[gk];W[pg];B[qe];W[fl];B[gm];W[gn];B[ll];W[ed];B[ng];W[qs];B[sq];W[lg];B[ee];W[ss];B[]C[Black mistakenly passed here (in AGA rules a pass is -1 point ... though I'm not sure that it makes a difference in this case)];W[pa];B[ma])(;W[li]))(;W[ko]C[This Ko is way too big]))(;W[nk]))(;B[op]))(;W[ch]))(;W[hk];B[gk];W[ii]))(;W[hk])(;W[ei];B[dh];W[hk]))(;B[hk]))(;W[dn];B[dm];W[em];B[en];W[fn];B[do];W[hm]))(;W[qq]))(;W[kc]C[This looks big, but isn't sente];B[mq]))(;W[ed]))(;W[kq]))