(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[AGA]SZ[19]KM[7.50]
PW[PS 1d]PB[Daniel Hu 5d]C[2019 MSO Open game 2]RE[B+Resign]
;B[pd]
;W[dc]
;B[pp]
;W[cp]
;B[eq]
;W[gq]
;B[ce]
(;W[dq]C[unlikely to be good to spend another move in this corner.]
;B[ed]
;W[ec]
;B[fd]
;W[fc]
;B[gd]
;W[hc]
;B[do]
;W[er]C[submissive]
;B[dk]
;W[ci]C[too early]
(;B[di]C[I've seen AI to this many times without understanding it, so I though to try it myself.]
;W[dh]
;B[ei]
(;W[cj]
;B[ck]
;W[cg]
;B[eg]
;W[eh]
;B[fh]
;W[dj]
;B[ej]
;W[ek]C[looked severe to me although W wasn't yet alive]
;B[el]
(;W[fi]C[but this seemed like nonsense to me.]
;B[fk]
;W[fg]
;B[gh]
;W[ef]
;B[gg]
(;W[dg]
;B[dd]
(;W[gf]
;B[gc]
;W[gb]
;B[cc]
;W[cb]
;B[hb]
;W[fb]
;B[ic]
(;W[bc]
;B[hf]
;W[qn]
(;B[ig]C[slow, but pretty urgent as I no longer have the ladder]
;W[qf]
;B[nq]
;W[pj]C[W is fast and B is solid. I suppose B doesn't technically have much territory yet, except for the vague potential in the centre and at the top]
;B[bd]C[severe, threatening to almost kill W with B13.]
;W[cd]
;B[fr]
;W[fq]
;B[cc]
;W[hd]C[What, surely this loses too much?]
;B[id]
;W[cd]
;B[ep]
;W[dr]
;B[cc]
;W[ib]
;B[ha]
;W[cd]
;B[hq]
;W[cc]
;B[de]C[I thought connecting was sente, but I'm not sure it is]
(;W[bf]
;B[gr]C[B's profit is obvious and immense, but W barely gained any points in the upper left despite "winning" the ko.]
;W[fo]C[really? this doesn't look like it can work]
;B[co]
;W[ho]
;B[hp]
;W[go]
;B[jp]
;W[bp]C[huge reverse sente]
;B[jn]C[but you can't just sacrifice this group.]
;W[dm]
;B[cm]
;W[cl]
;B[bm]
;W[in]
;B[jm]
;W[im]
;B[il]
;W[eo]
;B[dp]
;W[dl]
;B[bk]
;W[hl]
;B[ik]
;W[hk]C[I had to think for a long time here to decide if it was killable as I had cutting points everywhere]
;B[hj]
;W[ij]
(;B[jl]C[forced (K5 is sente)]
(;W[em]C[terrible shape]
;B[fm]
;W[fn]
;B[gj]C[I can defend in ideal shape]
;W[gm]
;B[fl]
;W[cn]
;B[bn]
;W[bl]
;B[al]C[B+R])
(;W[dn]
;B[cn]
;W[fm]C[this seemed troublesome]
(;B[gk]
(;W[gl]
;B[em]
;W[gn]
;B[en]
;W[hm])
(;W[hi]C[Not to mention this trouble]
;B[gj]
;W[gi]
(;B[ii]
;W[ih]
;B[jj]
;W[hg])
(;B[ih]
;W[ii]
;B[ki]C[I suppose it doesn't really work for W if B plays correctly.])))
(;B[bh]C[I did have this as back up though]
;W[be])
(;B[gl]
;W[jo]
;B[ko]
;W[io]
;B[kp]
;W[gj]
;B[hi]
;W[gk]
;B[fl]
;W[fj]
;B[ek]
;W[hm]C[I was concerned about capture races in this sort of variatioon]
;B[gn]
;W[bl]
;B[al]
;W[gm]
;B[em]
;W[en]
;B[fp]
;W[gp]
;B[ip]
;W[bj]
;B[ak]
;W[aj]
;B[am]
;W[bo]C[B loses by one liberty])))
(;B[gj]
;W[jo]
;B[ko]
;W[io]
(;B[kp]
;W[jl]
;B[jk]
;W[kl]
(;B[lm]
;W[jj])
(;B[km]C[I suppose this is technically possible though ugly.]))
(;B[ln]
;W[ip]
(;B[iq]C[looks risky with so many cutting points])
(;B[jq]
;W[ir]))))
(;W[gr]
;B[bf])
(;W[bk]
;B[bl]
;W[gr]
(;B[bg]
;W[bf]
;B[bh]
(;W[be]
;B[ch]
;W[cf]C[I don't think B can kill everything])
(;W[cf]
;B[be]
;W[bi]
;B[af]
;W[ag]
;B[ah]
;W[ai]
;B[ag]
;W[ch]
;B[ae]
;W[al]
;B[am]
;W[ak]))
(;B[bh]
;W[bg]
;B[bi]
;W[be]
;B[bj]
;W[cf])
(;B[bf]
;W[bg]
;B[df]
;W[aj]
;B[bh]
;W[bi]
;B[ag]
;W[ah])))
(;B[nq]
;W[hg]
;B[ge]
;W[ff]
;B[ig]
;W[hh]
;B[gi]
;W[if]
;B[he]
;W[jg]C[G10 is annoying later]))
(;W[hf]C[I thought this was better

PS mentioned he wanted to leave the aji of running out of the ladder]
;B[hd]
;W[bc]
;B[gi]))
(;W[cc]C[I felt this was better, but I'm not sure]
;B[gf]C[I guess living is very painful]
(;W[bf]
;B[bh]
;W[be])
(;W[bh]
;B[bf]
;W[bg]
;B[bj]
;W[bi]
;B[bk]
;W[de]
;B[cd]
;W[ff]C[really just 4 points.])))
(;W[dd]C[I thought this was better]
;B[ff]
;W[df]))
(;W[fk]C[surely here?]
;B[fi]
;W[bk]
;B[bl]
;W[bj]
;B[fl]
;W[gk]
;B[gl]
;W[hk]
;B[cm]
;W[fg]
;B[gg]
;W[ff]
;B[gf]
;W[ef]
;B[hh]
;W[dd]C[how is this?]))
(;W[ck]C[probably better to live rather than fight]
;B[cl]
;W[cj]
;B[dl]
;W[cg]
;B[eg]C[but still here, especially as black has the ladder now to defend the D10 cut.]))
(;B[ei]C[It's hard to understand how it could be better than the knight's move.]
;W[bk]C[perhaps this is annoying?]))
(;W[dh]C[pincer is an idea to make it more difficult for B to play D5.]))