(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[Yoda Norimoto]PB[Chang Hao]WR[9p]BR[7p]EV[Japan-China Super Go, 11th]
;B[pd]
;W[dp]
;B[pp]
;W[dd]
;B[fq]
;W[cn]
;B[jp]
;W[qn]
(;B[ql]C[Pincer necessary]
(;W[on]
;B[np]
;W[pk]C[Black can't cut, as white has the ladder. See variation at move 13.]
(;B[qo]
(;W[oq]
;B[op]C[Later on, black will block differently, which is why played P3 so early]
;W[qf]
;B[nc]
;W[qk]
;B[rn]
;W[qm]
(;B[cf]
;W[ch]
;B[fd]
(;W[ce]
;B[df]
(;W[bf]C[Seems soft]
(;B[dc]C[Best answer]
(;W[cc]
;B[ec]
;W[cb]
;B[id]
;W[of]C[Limit black, enlarge self, avoid invasion]
(;B[rd]C[Territory oriented.]
;W[hq]
;B[hp]
(;W[iq]
;B[ip]
(;W[jq]
;B[dq]C[Prevents clamp at e3. Very important move.]
;W[cq]
;B[kq]
;W[kr]
;B[lq]
;W[lr]
;B[mr]
;W[mq]
;B[nq]
;W[kp]
;B[lp]
(;W[fr]C[Better than the alternative]
;B[er]
;W[gp]
;B[gq]
;W[gr]
;B[fs]
;W[hs]
;B[ep]
;W[go]
;B[ko]
;W[cp]
;B[eo]
;W[dr]
;B[eq]
;W[ir]
;B[em]
;W[kc]C[Urgent]
;B[ke]
;W[ic]
;B[hc]
(;W[hb]
;B[jc]
;W[ib]
;B[jb]
;W[jd]
;B[kb]
;W[kd]
;B[lb]
(;W[je]
;B[hd]
;W[md]C[Good shape]
;B[nd]
;W[ne]
;B[rm]C[Corner no longer invadable.]
;W[rl]
;B[jk]C[Limit white, enlarge self, kill G5]
;W[hl]C[White is behind, time to play aggressive]
;B[gm]
;W[hm]
(;B[gn]
;W[mc]
;B[mb]
(;W[qe]C[Prevents black S14, and sente.]
;B[qd]
(;W[lk]C[Treat H8 lightly, as black already answered both of them]
;B[kl]
;W[jj]
;B[ij]
;W[ji]
;B[ll]
;W[ml]
;B[kk]
;W[lj]
;B[mm]
;W[nl]
;B[ii]
;W[ih]
;B[hh]
;W[ig]
(;B[sg]C[Big, but the game can get out of control]
;W[ro]
;B[rp]
;W[gi]
;B[hi]
;W[dl]C[Game is close again]
;B[ek]
;W[gj]
;B[dm]
;W[cm]
(;B[hk]
;W[dk]
;B[ej]
(;W[di]C[Shape]
(;B[nm]C[Another slow move]
;W[fh]C[Close]
;B[kj]
;W[ki]
;B[ol]
;W[ok]
;B[li]
;W[mk]
;B[if]
;W[jf]
;B[hg]
;W[jg]
;B[rh]C[good shape]
;W[qh]
;B[bg]
;W[be]
;B[cg]
;W[el]
;B[fl]
;W[gk]
;B[gl]
(;W[fb]
(;B[fc]
;W[ea]
;B[gb]
;W[ga]
;B[gc]
;W[bh]
;B[ah]
;W[ai]
;B[ag]
;W[bj])
(;B[eb]C[Can't block.]
;W[ed]
;B[fc]
;W[ff]))
(;W[gc]C[Better for white]
(;B[fc]
;W[gd]
;B[ge]
;W[gb]
;B[hf]
;W[ee]
;B[ef]
;W[fe]
;B[ff]
;W[de]
;B[fb])
(;B[fe]C[Only way for black]
;W[gd]
;B[hf]
;W[ff]
;B[fg]C[Only move for black])))
(;B[bg]C[Better]
;W[be]
;B[cg]))
(;W[sa]C[Can't tenuki]
;B[ci]
;W[di]
;B[dj]
;W[cj]
;B[ck]
;W[bi]
;B[cl]))
(;B[dk]C[Better]))
(;B[bg]C[Better, say, comments.]
;W[be]
;B[cg]))
(;W[jm]C[This is what the comments say. Attacks K9 and enables G5 aji]))
(;W[re]C[Same effect, but gote]))
(;B[hn]
;W[qh]C[Maybe better for black, less aji]))
(;W[hd]C[Not good]
;B[ie]
;W[gc]
;B[he]
;W[gd]
;B[ge]
;W[fb]
;B[le]C[Great for black]))
(;W[jd]
;B[je]
;W[hb]))
(;W[gq]
;B[gp]
;W[fr]
;B[er]
;W[fp]
;B[eq]
;W[gs]
;B[ep]C[Good for black]))
(;W[lr]C[This is perhaps better]))
(;W[ip]C[Wedge is possible, because white has ladders]
(;B[io]
;W[iq]
;B[gp]
;W[jq]C[Easy life])
(;B[iq]
;W[io]
(;B[gq]
;W[jq]
;B[hr]
;W[kp])
(;B[jo]C[Bad]
(;W[jq]C[Not the way to punish]
;B[ir]
;W[jn]
;B[kq]
;W[in])
(;W[ir]
;B[jq]
;W[gp]
;B[ho]
;W[go]
;B[in]
;W[gq]C[Black can get ko in corner])
(;W[gp]C[Best answer]
;B[ho]
;W[in]
;B[gq]
;W[hr]
;B[ir]
;W[go]
;B[hs]
;W[hn]
;B[gr]))
(;B[hr]C[White was worried about this.]
;W[jq]
;B[gq]
;W[ir]
;B[hq]
;W[kp]
;B[ol]C[Severe ladder break]))))
(;B[fo]C[Also good. Limits white, enlarges self]))
(;W[ec]C[Can't hane]))
(;B[bg]C[Not so good]
;W[be]
;B[cg]
;W[ee]C[Two weak groups])
(;B[ff]C[Not best. Good shape, but]
;W[fc]
;B[gc]
;W[ec]
;B[gd]))
(;W[ee]C[Usually, this is ok, but complicated]
(;B[de]
;W[ed]
;B[cd]
;W[cc]
;B[be]
;W[bd])
(;B[cc]
(;W[be]C[Wrong answer]
;B[dc])
(;W[cd]C[Even worse]
;B[dc])
(;W[dc]C[Only move]
;B[be]
;W[cd]
;B[bd]
;W[bc]C[Good for white]))))
(;W[df]C[White does not like this variation]
;B[dg]
;W[cg]
;B[dc]
;W[ce]
;B[cc]))
(;B[rm]C[Bad exchange this early in the game. Later black may be able to get S8. Also, white will not play S7 at this early stage, so it's not urgent.]
;W[rl]))
(;W[qk]
;B[rn]
;W[qm]
;B[rm]
;W[rl]
;B[sa]
;W[oq]
(;B[oo]C[Correct answer])
(;B[pq]C[Can't block here or O3]
;W[ro]
;B[rp]
;W[po]
;B[qp]
;W[op])
(;B[op]
;W[pq]C[White can live]
(;B[nq]
;W[rp]
;B[ro]
;W[qp]
;B[qq]
;W[rq]
;B[qr]
;W[rr]
;B[or]
;W[qs]
;B[pr]
;W[po])
(;B[qq]
;W[qr]
;B[rq]
;W[mr])))
(;W[rn]C[Not good, unless there is a stone around R14. Very slow, and makes white heavy. Actually, if R15, O17 exchange made, this is still bad.]
;B[qk]
;W[pj]
;B[pl]
;W[ol]
;B[qj]
;W[pi]
;B[qh]))
(;B[pl]
;W[ol]
;B[ok]C[Overplay]
(;W[qk]
;B[rk]
;W[rl]
;B[rm]
;W[qm]
;B[sl]
;W[pm]
;B[rl]
;W[qi])
(;W[oj]C[More severe]
;B[nk]
;W[nl]
;B[pj]
;W[qk]
;B[qj]
;W[rk]
;B[rl]
;W[rj]
;B[ri]
;W[qi]
;B[pi]
;W[mk]
;B[nj]
;W[oi]
;B[ph])))
(;W[qq]C[Too good for black]
;B[pq]
;W[qp]
;B[po]
;W[rn]
;B[om]))
(;B[np]
;W[rp]
;B[qq]
;W[qk]C[Black's shape is not good. Too easy to invade])
(;B[nq]
;W[rp]C[Black's shape is not good]
;B[qq]
;W[qk]C[Too easy to invade]))