(;SZ[19]FF[3]
PW[Huang Longshi]
PB[Zhou Donghou]
DT[Late 17th century]
RU[Old Chinese]
RE[W+]
GC[Main comments are by Xu Xingyou (Xu) with modern interpolations in [ ]]
US[GoGoD95]
AB[pp][dd]
AW[pd][dp]
;W[fc];B[cg];W[jc]C[Varies from the then usual 2-point extension and so has a modern feel.];B[qi]C[To stop a double-wing development by White.];W[qn]C[Old style. The modern style favours approach on the other, wider side. Old go can be summed up in one word: 'tight'.];B[mq];W[ci]C[Regarded as more urgent then than the modern F4, (or F3 or G3) because it was deemed essential to stop Black developing from C13. C11 was also seen as providing a springboard for invading the corner.];B[fq]C[Zhou, for a change, takes up an orthodox position.];W[qk]C[Not answering the lower left corner attack was typical of Huang. He wants to start a fight. A modern version of this would be to play R13, forcing R8, and then to dodge into the corner with R3. But this trade (furikawari) style of play had not yet been developed.];B[qf]C[Forced, otherwise White would be able to make territory while attacking at R13. But Black will still end up overconcentrated.];W[pf];B[pg];W[qe];B[rf];W[og];B[ph]C[(Xu) Weak. Should move into the the corner with S15, S16, R17. If you do not prepare a road, you cannot go anywhere. [The modern commentaries agree]];W[of]C[(Xu) This solid connection gives White powerful influence and there are no openings Black can exploit.];B[qo];W[pn];B[rd]C[Wrong - should be S15. Black is already behind here as White has sente.];W[qc];B[rc]C[(Xu) Not necessary, and too small.];W[kq]C[Again preferring to pressurise Black rather than defend in the lower left corner first, which would be the modern (and better) style, even though White does force Black and get the momentum to make a move on the left (27).];B[no];W[hq];B[fo];W[cm];B[ho];W[dr]C[Takes the chance to defend the corner.];B[er];W[eo]C[To take sente so that his lower centre group can move out in good order.];B[fn];W[eq];B[fr];W[ko]C[(Xu) Should be the more straightforward J5, J6, H4, H6, K5. Modern players would perhaps regard H6 in this line as slack, but K4, trying for a trade, has its problems: G5, J4, F4, G6, G4, J3, J2, K2, H2, L2 and it is White who has sente.];B[ir]C[(Xu) Premature. He should first force at P7. [Modern commentaries agree. The idea of P7 is to build up influence, which would give him more options for attacking White in the lower centre. This in turn gives him more options about how to play in the lower left corner. He does get to play there but only to give his own group eye shape - which should have been unnecessary.]];W[iq];B[hr];W[gq]C[(Xu) Strong.];B[fp];W[gr];B[jr];W[kr];B[gs];W[hs];B[is];W[jq];B[cq];W[dq];B[cr];W[cp];B[ds]C[(Xu) Slack. Should be O7.];W[qq]C[(Xu) A sacrifice play to secure himself on the outside. The white groups will manoeuvre cleverly in a kaleidoscope of variations.  [It is difficult for Black to respond. Whichever side he plays on, White stabilises himself on one side.]];B[rn]C[If Q3, White stabilises the right side group with S5.];W[rm];B[ro];W[or];B[oq];W[nr];B[pr];W[nq];B[pq];W[np]C[(Xu) White has now secured his base in sente - and with actual territory.];B[oo];W[rj]C[(Xu) One of a sequence of six moves by White that brim with possibiloities. He makes wonderfully effective use of them. [Vital point for attack and defence]];B[ok]C[(Xu) Insufferable. Black's groups remain weak.];W[rh]C[Right order before his next move.];B[ri];W[pj];B[oh];W[si];B[qh];W[oj];B[qj];W[rl];B[pk];W[pl]C[White is now completely alive.];B[nj];W[bq]C[(Xu) Big. [Agreed. It attacks the base of Black's group while stabilising his own left side.]];B[mp];W[mr];B[jo]C[(Xu) Should still be at P7, using the peep to cover his defects. This and other moves by Black make it seem as if he is battling uphill. [Premature. He should first force with P7, Q7 to prevent White Q5 and N5.]];W[jn];B[in];W[jp];B[io];W[po];B[op];W[mo];B[lo]C[(Xu) Still battling uphill.];W[mn];B[ln];W[nn]C[(Xu) White seals Black in, in sente.];B[qr]C[Forced.];W[lp];B[kn]C[Better is M7 to prevent the squeeze that follows in the game.];W[nk];B[ol];W[ni];B[mj]C[(Xu) Should be Q7, which leaves lots of possibilities. [Agreed. It also avoids the squeeze.]];W[om];B[nl]C[(Xu) Yet again Black is having an uphill struggle.];W[ml]C[(Xu) Sets up a squeeze.];B[mk];W[nm];B[nk];W[oi];B[nh];W[mi]C[(Xu) Now that White has been able to squeeze AND push out, the outcome is effectively settled. [Agreed]];B[kp];W[lq];B[oc]C[(Xu) Start of a sequence by which Black tries to make something out of nothing. [Agreed. Last desperate fling.]];W[rb];B[li];W[mh];B[ng];W[od];B[ob];W[lh];B[nd];W[nf];B[mg];W[lk];B[mf];W[re];B[qb]C[A good move, but White defends well.];W[pb];B[pc];W[qd];B[pa];W[sc];B[ne];W[oe];B[ra];W[sd];B[gc]C[(Xu) Black has made something out of nothing, but in the end he cannot save himself on both sides at once. [Black lives but is behind overall. This move is a ladder breaker.]];W[kg];B[gd];W[me]C[(Xu) If N17, O17, N18, Black would find it even more difficult to cope.];B[le];W[md];B[nc];W[ld];B[kd];W[ke]C[(Xu) He could have captured the group cleanly with M14. [Agreed. The follow up is L15, M17, L17, M18, etc.]];B[lf];W[kc];B[kf];W[jd];B[jf];W[mb];B[mc];W[lc]C[Bad. Should be M18 to kill Black at once.];B[na];W[je];B[hb]C[Black is still on the defensive.];W[cc]C[(Xu) To take actual territory. [Too early. But White can see victory ahead.]];B[cd];W[dc];B[eb];W[ec];B[fb];W[ee];B[df];W[fe];B[hf];W[if];B[ig];W[ie];B[kh];W[lj];B[jh];W[he];B[ge];W[fg];B[gf]C[(Xu) Should be the tiger's mouth at G13. If White then plays D12, Black captures White cleanly after cutting at M18. If, instead, White answers at M18, White's corner group is still very heavy, so that Black can still seek complications.];W[eg];B[dh];W[bf]C[(Xu) White had already foreseen this, and his next.];B[di];W[bd];B[lb];W[hg]C[(Xu) Now Black is in even more distress. This is the punishment for not playing G13. Black has three weak groups and has to scurry for life.];B[gg];W[hh];B[jj];W[gh];B[ic];W[fi];B[cl];W[dl];B[ck];W[dm];B[dk];W[jb];B[ib];W[ik];B[jk];W[jl];B[ij];W[ji];B[ki];W[ii];B[kj];W[hk];B[kl];W[il];B[hj];W[fk];B[gj];W[ek];B[bi];W[jm];B[br];W[bp];B[gk];W[gl];B[fl];W[fm];B[gm];W[el];B[hm];W[hl];B[ar];W[lg];B[jg];W[kk]C[If K19 first, he can extend his liberties by one and so avoid a ko. But White still won. He was indeed a skilful butcher, accomplishing his task smoothly with few cuts. But White did not take full account of his superior position and did not exploit all the possibilities. Black did not take account of his inferior position and was lacking in vitality. Both simply played doggedly to the end. When go is played like this, careless moves appear. (Xu)])