(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]KM[6.50]TM[60] GN[st24-mathmo(B) IGS]PW[st24]PB[mathmo]WR[5d]BR[5d]DT[2017-12-23]CP[ Copyright (c) PANDANET Inc. 2017 Permission to reproduce this game is given, provided proper credit is given. No warrantee, implied or explicit, is understood. Use of this game is an understanding and agreement of this notice. ]EV[Internet Go Server game: st24 vs mathmo]PC[IGS: igs.joyjoy.net 6969]US[Brought to you by IGS PANDANET]C[ st24 5d : Hi! mathmo 5d : Hi! ]RE[B+Time]LT[]NB[33]NW[33]RR[Normal] ;B[pd]BL[55] ;W[dc]WL[60] ;B[pp]BL[50] ;W[dq]WL[58] ;B[ce]BL[45] ;W[dh]WL[56] ;B[ed]BL[41] ;W[dd]WL[54] ;B[de]BL[36] ;W[ee]WL[54] ;B[ec]BL[33] ;W[eb]WL[52] ;B[fb]BL[31] ;W[db]WL[47] ;B[ef]BL[23] ;W[fe]WL[45] ;B[gd]BL[20] ;W[ff]WL[586] ;B[eg]BL[14] ;W[fd]WL[575] ;B[fc]BL[2] ;W[gc]WL[573] ;B[gb]BL[598] ;W[hc]WL[572] ;B[hb]BL[594] ;W[ic]WL[572] ;B[ib]BL[587] ;W[jc]WL[567] ;B[jb]BL[584] ;W[kc]WL[540] ;B[kb]BL[535] ;W[lc]WL[395] ;B[bc]BL[518] ;W[cg]WL[392] ;B[dg]BL[465] (;W[ci]WL[229]C[this is surely a disaster for W in the upper left] ;B[qf]BL[441] (;W[cf]WL[196]C[big mistake] ;B[df]BL[436] ;W[be]WL[191] ;B[bd]BL[433] ;W[bf]WL[184]C[clearly a misread] ;B[fg]BL[425]C[interesting how long I delay making this good exchange. But I can't see a reason that I should exchange it earlier. Maybe someone else can tell me.] ;W[he]WL[181] (;B[gg]BL[409] ;W[hf]WL[179] ;B[co]BL[396] (;W[cm]WL[176] ;B[ep]BL[372] ;W[dp]WL[172] ;B[do]BL[369] ;W[eo]WL[172] ;B[dm]BL[367]C[I have wondered before why this isn't a joseki move. I was glad to see alphago play this in the teaching tool. Only in some situations is this good, but this one seems perfect as the C11 group is not that strong, but not so close to C7 to defend the cut, and the G13 wall does a good job reducing the potential W influence.] (;W[dl]WL[169] ;B[em]BL[354] ;W[fp]WL[94] ;B[cl]BL[348] ;W[ck]WL[91] ;B[bl]BL[341] ;W[dk]WL[89] ;B[nq]BL[241] ;W[bm]WL[73] ;B[bn]BL[233] ;W[bk]WL[66] ;B[bq]BL[228] ;W[br]WL[26] ;B[gm]BL[218] ;W[ro]WL[570] (;B[rp]BL[187]C[maybe I understand better why alphago tends not to like this move, as I was conscious that B doesn't have a good follow up if W tenukies, and the R4 wedge is pretty interesting when the centre and right are so open] ;W[op]WL[533] ;B[oo]BL[178]C[you're not going to trick a 5d like this ...] ;W[qp]WL[489] ;B[qo]BL[596] ;W[qq]WL[487] ;B[rq]BL[516]C[this move definitely requires the reading that took me over a minute] ;W[pq]WL[484] ;B[po]BL[514] (;W[oq]WL[466] ;B[np]BL[510] ;W[rr]WL[450] ;B[rn]BL[506] ;W[sq]WL[447] ;B[so]BL[504] ;W[nr]WL[445] ;B[mr]BL[502] (;W[os]WL[373]C[only move] ;B[nj]BL[360]C[adventurous, and in the game I didn't feel like I knew how to use it, but I felt like trying it out since W gave me such a nice outside] (;W[pg]WL[365]C[normal as the B corner isn't all that secure] ;B[pf]BL[354] ;W[og]WL[353] ;B[hp]BL[281] ;W[ho]WL[297]C[I found it very difficult to find a good move here, as there is all sorts of aji with the F7 wedge that I hadn't noticed before, and I would also like to find a way to deal with the N3 cut.] ;B[io]BL[78] (;W[go]WL[279] ;B[in]BL[75]C[B's result is ok, but the F7 wedge sort of aji is annoying] ;W[qg]WL[218] ;B[nc]BL[70] ;W[pj]WL[191] (;B[kq]BL[57] ;W[lb]WL[178] ;B[cr]BL[48] ;W[bp]WL[163] ;B[sr]BL[35] (;W[ss]WL[91] (;B[bs]BL[31] ;W[ar]WL[87] ;B[aq]BL[29] ;W[cp]WL[75] ;B[dr]BL[27] ;W[er]WL[65] ;B[ds]BL[23]C[this wasn't small, and I was thinking the F7 cut is less to worry about as it is lighter, but that makes no sense logically as if I get cut at F7, I can always play this variation. So this seems premature and the centre seems bigger] ;W[lj]WL[19]C[W is busy but the top right corner has issues (e.g. Q18) and there is a 1 step ko with B18.] ;B[qs]BL[20] (;W[qr]WL[6] ;B[ms]BL[18]C[W suddenly died ... B has over 70 points, W has under 30.] ;OS[]) (;W[ms]C[no choice, it is ko])) (;B[sp]C[I was even thinking about this as being annoying in some lines but it doesn't seem to do anything] ;W[pr])) (;W[cq] ;B[qr] ;W[ss] ;B[pr] ;W[or] ;B[qs]C[unconditional]) (;W[qs]C[only move to live, but I hadn't yet found it yet, and was wondering if W was already ko for life]) (;W[pr] ;B[rs])) (;B[jq]C[this feels like better shape to me, but my in game kill wouldn't work so well anymore due to liberty issues at N2 I hadn't yet figured out that W was unconditionally alive])) (;W[hn]C[not sure why W didn't play here])) (;W[mq] ;B[mp]C[this was the plan])) (;W[ns] ;B[rs] (;W[qs] ;B[ps] ;W[qr] ;B[or]) (;W[qr] ;B[sr]) (;W[sr] ;B[qr] ;W[pr] ;B[ps])) (;W[or] ;B[sr] (;W[ps] ;B[qr] ;W[ss] ;B[sp] ;W[ns] ;B[sr]) (;W[qr] ;B[ps]) (;W[qs] ;B[sp] ;W[pr] ;B[rs]) (;W[ss] ;B[sp] (;W[ps] ;B[qr]) (;W[ns] ;B[sr] ;W[ps] ;B[qr]) (;W[qs] ;B[sr])))) (;W[rn] ;B[rr] ;W[no] (;B[np] ;W[on]C[interesting at least]) (;B[qm]))) (;B[qp]C[whereas this does things with one move, though it is far worse for points. In some sense, W is heavier and more easily captured on a large scale if W does defend properly] ;W[ql] ;B[qj]C[but if W defends properly, B is pretty happy too])) (;W[en]C[this is standard punishment] ;B[cl] ;W[fp]C[but B is happy to just settle like this especially with the context of the not solid C11 group and the G13 wall] ;B[bj] ;W[bi] ;B[nq] ;W[dl]C[troublesome] ;B[bm]C[maybe this is good enough?] ;W[em] ;B[cn] ;W[dk] ;B[bq]C[normally W's wall is more useful than in this game where it looks pretty dumb])) (;W[bb] ;B[ab] (;W[cc] ;B[ca]C[W has nothing]) (;W[ca] ;B[cc]) (;W[ba] ;B[cd] ;W[fa] ;B[ga] ;W[da]C[the most is a 2 step ko] ;B[cb] ;W[cc]))) (;B[co] ;W[gg]C[this is troublesome with the C16 cut])) (;W[be]C[this is correct] (;B[bd] ;W[bf] ;B[cd]) (;B[bf] ;W[cf] (;B[bg] ;W[cd] ;B[df] ;W[bd]) (;B[bd] ;W[df] ;B[ae])))) (;W[cn]C[proper]))