(;SZ[19]FF[3] CA[utf-8] PW[Huang Longshi] PB[Zhou Donghou] DT[Late 17th century] RU[Old Chinese] RE[W+] SO[Huang's Collected Games, #1] US[GoGoD95] AB[pp][dd] AW[pd][dp] ;W[qn];B[fq];W[kq];B[qf];W[mc];B[kc];W[fc];B[qj];W[on];B[cn] C[Zhou Donghou once said that when players are evenly matched and the other side has first move, it is impossible to achieve victory by using orthodox moves. It is necessary to use unorthodox moves to seek complications. On the whole this is not a sound theory. The double attack on the corner with C6 instead of defending at N3 is an example of this.] ;W[eo] C[Not especially severe, but versatile. Once he sees how Black responds, he can prepare ways to press on either side. Good.] ;B[iq];W[ci];B[ck];W[cf];B[df];W[dg];B[ce];W[bf];B[eg];W[be];B[bd];W[cc];B[cd];W[ef] ;B[de];W[dh];B[ff] C[Ineffectual. He should block off the corner at D17.] ;W[dc];B[bp] C[Impetuous, just like C6.] ;W[er] C[This and White's next two moves show great insight.] ;B[fr];W[eq];B[fp];W[bq];B[cq] C[Black feels unable to pull back to B5. This is the problem with the double-wing attack on the corner. He should still play N3.] ;W[bo] C[Now Black will find it troublesome to look after both his outside groups.] ;B[br];W[co];B[dn];W[cp];B[aq];W[en];B[bn];W[ao];B[ep];W[do];B[dq] C[Once he played B6, Black left himself no option but to capture these two stones.] ;W[ek]C[Now this is White's privilege, and it is all because of the foresight of E2 and the impetuosity of C3.] ;B[em];W[fm];B[el];W[fl];B[dk];W[ej] C[Steadier and more careful would be the solid connection at F9.] ;B[bj] C[Should be at A6 to seek life.] ;W[an];B[cm];W[bl];B[cl];W[am] C[White has foreseen all of this and the next twenty moves. Black's replies may be considered forced.] ;B[fn];W[fo];B[gn];W[go];B[hn];W[ho];B[fk];W[gl];B[ei];W[dj];B[fj];W[bi];B[io];W[bk] ;B[il];W[gj];B[hp];W[dm];B[dl];W[cj];B[no] C[Should be at R5 first. Then there are even more variations.] ;W[jp];B[ip];W[nq];B[or] C[Both players play the ensuing moves correctly.] ;W[nr];B[oq];W[oo];B[np];W[op];B[mq];W[mr];B[mp];W[lq];B[ns];W[lr];B[qq];W[rp] C[White is like the proverbial butcher who skilfully wields his knife with room to spare.] ;B[nn] C[Insufferable. He should block at S3.] ;W[rq];B[om];W[po];B[qo];W[pn];B[rr];W[qp] C[Start of a brilliant 20-move sequence. He bides his time and shows no anxiety about taking the corner.] ;B[pq];W[sr];B[qs];W[kn];B[ko];W[jo];B[jn];W[lo];B[km];W[ln];B[nl];W[jm];B[in];W[kl] ;B[sq];W[sp];B[rm] C[Seals White in before playing the ko. But White's group has already established a base and Black must get three moves before he can settle the ko. Yet Black has no option but to play the ko in earnest.] ;W[rn];B[qm];W[jr];B[sn];W[rs];B[ss];W[qr];B[sq];W[gp];B[gq];W[sr];B[pr];W[rs];B[pm] ;W[ro];B[ss];W[mm];B[nm];W[rs];B[lp];W[kp];B[ss];W[ic];B[sq];W[pf];B[sr];W[qe] C[With J17, Q14 and this, White has gained double what he lost in the ko. He has extracted the utmost from all the complications. But J17 should really have been the peep at F16. Having reassured himself that he can give up the lower right corner, he could have freely forced White by making more ko threats and so acted even more decisively. Moreover, he ought not to have left his weak group in the botton centre in doubt. He cannot be totally satisfied.] ;B[fd];W[gc];B[ee] C[Steady and careful.] ;W[qg];B[hd];W[hc] C[Best under the circumstances, his attack having lost time.] ;B[qc];W[pc];B[rf];W[rg];B[pb];W[ob];B[rd];W[re];B[rb];W[je];B[nb];W[oa] C[Resolutely denies Black the connection along the edge.] ;B[ke];W[kf];B[jf];W[jd];B[lf];W[kg];B[oc];W[nc];B[od];W[mb];B[oe];W[qd];B[of];W[og] ;B[ng];W[nh];B[oh];W[pg];B[mg];W[mh] C[This and his next are overplays. He should seal off his territory with L16.] ;B[lh];W[lg] C[Once he cuts here, White must play N14 and later go back to L16. There will be a ko for the group on the outside, and so he cannot yet settle the game. It ought not to have come to this.] ;B[jg];W[kh];B[li];W[mf];B[nf];W[mj];B[me];W[kd];B[ld];W[lc];B[lj] C[A mistake. It is too weak, and should be K11. He should start the ko in order to seek a trade, and of course to turn a lost game into victory. He should certainly do this, because both the top right and top left corners still have potential.] ;W[jh];B[ih];W[ji];B[oi];W[ii];B[kk];W[fh] C[With J11 and this, Black's corner group is already doomed.] ;B[ir];W[fi];B[ri] C[Sets up a ko, but Black cannot win it because of White's large group below.] ;W[sd];B[sc];W[rc];B[hk];W[gk];B[rd];W[lk];B[ll];W[rc];B[cg];W[bg];B[rd];W[mk];B[mi] ;W[rc];B[jl] C[No option, even though it means losing the corner - this is all because of the hasty M10.] ;W[qb];B[hg];W[hf];B[ij];W[hi];B[jj] C[White won. With such imprecise calculations it may seem this game is not worthy of selection as a masterpiece, but it keeps its place because White's moves were deeply significant and brilliant, and the way he played when he leisurely ignored the ko in the bottom right was wonderful.])