(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]KM[6.50]TM[900]OT[1x12 byo-yomi] GN[Friendly Match]PW[patlee]PB[slashpine]WR[8k]BR[11k]DT[2019-12-28]PC[OGS: https://online-go.com/game/21073670]RE[W+22.50] ;B[pd] ;W[pp] ;B[cd] ;W[do] ;B[id] ;W[ed] ;B[df] ;W[cc] (;B[pj]C[Playing on the top left was more important. See variation.] ;W[nd] ;B[ld] ;W[lc] ;B[kc] ;W[mc] (;B[pc]C[See variation.] ;W[kb] ;B[jc] ;W[le] (;B[kd]C[Ugly shape. You are overconcentrated. You don't need to save the M16 stone. Even if White cuts at L16, you can counter-atari at L15 and White only gets a false eye.] ;W[me] ;B[jb] ;W[pe] ;B[qe] ;W[pf] ;B[qf] ;W[pg] ;B[qg] ;W[ph] ;B[qi] ;W[ql] ;B[qj]LB[bc:B][nj:A][cq:C][nq:D][qq:E]C[Horror! Don't play unnecessary empty triangles. Locally, a move around A would have been better. But you can also play elsewhere (B, C, D, E).] ;W[dd] ;B[ce] ;W[gc] ;B[hc]LB[lb:B][bc:A]C[Very small move. You are adding a stone to an already overconcentrated group. You are not in danger since you can make an eye at B anytime, and you have access to the center. Even a move at A would have been bigger than H17.] ;W[gd] ;B[gb]C[Small.] ;W[fb] ;B[hb]C[You lost sente with this small move...] ;W[bc]C[... And White takes B17, which is a very big point.] ;B[ci]C[... And now you are on the run] ;W[ck] ;B[ei] ;W[dq] (;B[kq]C[With this move in the center, you help White build territory in the corners. See variation.] ;W[nq] ;B[hq] ;W[fq] ;B[mr] ;W[nr] ;B[lo] ;W[pn] ;B[cm] ;W[dm] ;B[cl] ;W[dl] ;B[bk] ;W[cj] ;B[bj] ;W[ek] ;B[nj] ;W[cn] ;B[bn] ;W[bo] ;B[bm] ;W[ob] ;B[pb] ;W[od] ;B[oc] ;W[nb] ;B[nc] ;W[md] ;B[lb] ;W[mb] ;B[ka] ;W[pa] (;B[rb] ;W[ra] ;B[qb] ;W[qa] ;B[qq] ;W[qp] ;B[pq] ;W[oq] ;B[rp] ;W[ro] ;B[rr] ;W[sp] (;B[pr]C[See variation.] ;W[rq] ;B[sr] ;W[qs] ;B[rs] ;W[ps] ;B[os] ;W[or] ;B[go] ;W[qr] ;B[dj] ;W[dk] ;B[nf] ;W[mg] ;B[ng] ;W[nh] (;B[mf]C[See variation.] ;W[lg] ;B[lf] ;W[kf] ;B[kg] ;W[mh] ;B[ke] ;W[jf] ;B[kh] ;W[if] ;B[he] ;W[ef] ;B[eg] ;W[de] ;B[cg] ;W[ff] ;B[hf] ;W[og] ;B[ig] ;W[gg] ;B[hg] ;W[gp] ;B[hp] ;W[fo] ;B[gn] ;W[gk] ;B[jg] ;W[of] ;B[gh] ;W[ik] ;B[im] ;W[kk] ;B[lj] ;W[lk] ;B[mk] ;W[kj] ;B[li] ;W[km] ;B[jn] ;W[ml] ;B[nl] ;W[mm] ;B[pm] ;W[qm] ;B[pl] ;W[om] ;B[ol] ;W[nm] ;B[hk] ;W[hl] ;B[hj] ;W[gl] ;B[il] ;W[jl] ;B[ij] ;W[jk] ;B[hn] ;W[fm] ;B[fn] ;W[en] ;B[gr] ;W[fr] ;B[gq] ;W[fp] ;B[mq] ;W[mp] ;B[lp] ;W[mo] ;B[ms] ;W[ns] ;B[ln] ;W[lm] ;B[mn] ;W[nn] ;B[bd] ;W[ad] ;B[ae] ;W[ac] ;B[bf] ;W[an] ;B[am] ;W[ao] ;B[fg] ;W[gf] ;B[ge] ;W[fe] ;B[je] ;W[ne] ;B[rk] ;W[fa] ;B[ga] ;W[rl] ;B[hd] ;W[ki] ;B[fc] ;W[fd] ;B[ec] ;W[eb] ;B[qk] ;W[ni] ;B[ji] ;W[lh] ;B[mj] ;W[qh] ;B[rh] ;W[sl] ;B[sk] ;W[gs] ;B[hs] ;W[fs] ;B[sb] ;W[ej] ;B[di] ;W[fi] ;B[gi] ;W[fj] ;B[fh] ;W[gj] ;B[ie] ;W[lf] ;B[jj] ;W[kn] ;B[ko] ;W[oi] ;B[oj] ;W[ma] ;B[la] ;W[oa] ;B[jm] ;W[] ;B[ll] ;W[kl] ;B[no] ;W[np] ;B[oo] ;W[po] ;B[] ;W[sa] ;B[] ;W[hm] ;B[io] ;W[] ;B[]) (;B[mh]TR[nf][ng]C[Then try to save your triangled stones. This may not work, but at least you have a chance to get back into the game.])) (;B[sq]C[Ko.])) (;B[qb] ;W[qa] ;B[ra] ;W[oa] ;B[rb])) (;B[qq] ;W[pq] ;B[qp] ;W[qo] ;B[ro] ;W[qn] ;B[rn] ;W[rm] ;B[qr] ;W[pr] ;B[jq] ;W[hq] ;B[mq])) (;B[bc]C[Suppose Black plays elsewhere...] ;W[kd]C[... And suppose White cuts] ;B[ke] ;W[md] ;B[je]LB[ld:A]C[A is a false eye. So White wouldn't play like that.])) (;B[kb]TR[lc][mc][nd]C[Repair your shape while attacking the weak white group.])) (;B[bc] ;W[dc] ;B[bb] ;W[gc]TR[bb][bc][cd][df]SQ[cc][dc][gc][ed]C[The black group is alive, and the white group has no base.]))