(;B[pd]GM[1]FF[4]SZ[19]AP[SmartGo:2.5.0.0]CA[utf-8]GN[Romania-Canada]PW[Georghe Cornel Burzo, Romania]WR[6d]PB[Juyong Ko, Canada]BR[7d]EV[WAGC]RO[6]DT[2009-05-29]KM[6.5]RE[B+ 5.5]US[NHK, transcribed by Chris Garlock]AN[Michael Redmond 9P]C[30th World Amateur Go ChampionshipEcopa Arena, Fukuroi City, Shizuoka Prefecture, JapanRound 6 May 29, 2009W: Georghe Cornel Burzo 6d, RomaniaB: Juyong Koh 7d, CanadaCommentary by Michael Redmond 9P, transcribed by Chris Garlock. Originally published on the International Go Federation’s Ranka Online: The big question is this game is how a guy with no ko threats winds up with five against Mr Koh. After Canada’s Juyong Koh 7d creates a ko for life in Cornel Burzo 6d of Romania’s moyo, Burzo - who chose not to attack the group more severely-- manages to conjure up ko threats out of thin air. Koh, who has a chance to ignore the first threat, has no choice after responding and eventually loses the ko. However, Burzo then begins playing overly safely, according to game commentator Michael Redmond 9P, losing points in the endgame and coming up 5.5 short in the end. ];W[dc];B[dq];W[pp];B[de];W[ce];B[cf];W[cd];B[df];W[fc];B[cl];W[jq];B[hp];W[jo];B[iq];W[jr];B[in];W[cq];B[cp];W[dp];B[co];W[dk];B[ck];W[di];B[dj];W[ej];B[cj];W[fi];B[gf];W[ii]C[At this point they're both looking fairly strng; the moves seem to make sense; seems a bit early for B to move at a, maybe b instead; seems like B feels like he has a lead, but prob not true](;B[eq];W[qf];B[qh];W[of];B[nc]C[Go Seigen prefers to slide first, at b](;W[pk]C[interesting pincer; trying to use W's center stones as influence]TR[fi][ii];B[qe];W[rf]C[a is a big move, but it'd be more natural to continue with the fight on the right](;B[qq]C[Maybe B is thinking he'll get the 3-3 and then be able to play on the top, but my experience is that things will have changed. ];W[qp];B[pq];W[oq];B[or];W[pr];B[rp];W[rq];B[qr];W[ro]C[B can tenuki here now; if he starts with b...](;B[nq];W[op];B[mr];W[rr];B[ps];W[jn]C[this is good; strengthens W's group and influence towards the center. For B, he needs to play faster and try to dodge lightly into the center somehow](;B[im];W[jm];B[il];W[jl];B[ik];W[kj]C[now it's very diff bot B to fight on the right side he has to go in, but it's not going according to plan anymore];B[pj];W[qk];B[qj];W[nh];B[rk]C[W is so thick that he can just play at b, B's key point for life. But it's a bit of a scary move, though it seems to work in this case](;W[rl];B[ri]C[Diff for B to kill outright now]LB[pg:A];W[sk];B[sj];W[rj];B[og];W[pg];B[rk];W[rs]C[This is W's only threat and it's a big question whether B should answer. I think B should just finish the ko; it's a pretty playable position for B, especially since there's aji for possible life for the marked stones (see var)]TR[nq][mr][or](;B[qs];W[rj];B[gh];W[gi];B[rk];W[ns]C[Now B has to answer, because the group would be entire dead and the hane at A (in the previous variation) is much smaller and not forcing]LB[ok:A];B[ms];W[rj];B[hh];W[hi];B[rk];W[os];B[nr];W[rj];B[jk];W[kk];B[rk];W[os];B[ns];W[rj];B[ji];W[ih];B[rk];W[fe]C[Here B has another big chance to ignore the threat; if W tries to attack the entire group, B can handle it fairly easily; if W cuts off the three marked stones, B connects underneath and because of W's weakness in the upper right, it will be difficult for W to surround the upper side.]TR[gf][gh:hh](;B[eh];W[rj];B[ed];W[si];B[ec];W[eb];B[fb]C[this is a difficult choice for W; plays on both the left and the right are feasible.];W[gb];B[db];W[fa];B[cc];W[lc];B[nf];W[ng];B[oe];W[oh];B[hc]C[W should keep the connection in reserve and play b instead](;W[fd];B[dd];W[jc];B[jj];W[if];B[he];W[id];B[hd];W[hb];B[ic];W[ib];B[mo]C[White is playing very safely, as if he has a lead. But he should play at b, which is much bigger](;W[rd];B[qc];W[nn];B[mn];W[mm];B[no];W[on];B[ki];W[hf];B[ge];W[gg];B[fg];W[hg];B[ff];W[li];B[ei];W[gm];B[io];W[lq];B[np];W[hr];B[oo];W[pn];B[fj];W[gk];B[fl];W[gl];B[lh];W[mi];B[fh];W[mf];B[rc];W[fm];B[gq];W[dm];B[ek];W[fk];B[cm];W[mb];B[nb];W[gr];B[ir];W[is];B[fr];W[fp];B[hq];W[hs];B[fq];W[sc];B[sb];W[sd];B[re];W[se];B[qb];W[ie];B[kg];W[do];B[go];W[cn];B[bn];W[dn];B[bq];W[ln];B[lo];W[ko];B[lm](;W[ll]C[W doesn't have to give this away; it's a 5-point gift.No further comments];B[kn];W[ne];B[mc];W[lb];B[ke];W[el];B[fo])(;W[kn];B[ml];W[nm];B[kl];W[mk]))(;W[qc](;B[rd];W[rc];B[re];W[ob];B[nb];W[oc];B[od];W[pc]C[disaster for B])(;B[re];W[ob];B[nb];W[rd];B[se];W[oc];B[od];W[rb]C[ging to be something like a ko])(;B[pc];W[rd];B[qb];W[rb];B[qd];W[rc];B[mb];W[nn]C[big difference in points; more than the 4.5 that Blac winds up winning by])))(;W[ic];B[id];W[ib];B[re];W[cb];B[dd];W[da]C[more profitable for W]))(;B[sl](;W[ci];B[eh];W[ei];B[ge])(;W[eg];B[ci])))(;B[sl];W[qs];B[np](;W[no];B[mo];W[nn];B[kp];W[jp];B[lq])(;W[lq];B[ok])))(;W[ri](;B[rl];W[rh];B[ok];W[pl])(;B[rh];W[rl];B[rj];W[oh]C[diff for B to live; looks really dangerous])))(;B[il];W[jm];B[jj]))(;B[oj]C[W will attack and drive B towards his thickness. But if B can live, his strategy will have succeeded. ];W[oh];B[pj];W[qk];B[qj];W[mi]))(;B[oj];W[ok];B[nj];W[nk];B[mj]C[this would be more normal; W has to manage both the center group and the upper right group. And there's a big question about who gets the 3-3 first]))(;W[rd];B[qc]C[the slide would be bad if W then follows the b variation](;W[pk])(;W[pi];B[ph];W[oh];B[qi];W[pj];B[qj];W[pk];B[ql];W[om];B[pg];W[og];B[pf])))(;B[pj]))