When a 3H game goes lost, we can try to find moves that "lost a move".
You found two: 60 and 126. Good analysis.
Another one is as early as move 20. Small life in gote and being sealed in is really unacceptable in that situation.
Other than that there's a clear theme to be found in moves 30, 70 and 74:
When your opponent threatens to cut a weaker part from a strong part, always consider if you can strengthen the weaker part and whether the cut is then still a problem.
The fact that all these connections were empty triangles, should make you very critical, almost sick of playing that move and as such look for alternatives.
I must congratulate you with move 54: it takes into account the weakness of the shape very well.
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]HA[3]KM[-5.50]TM[60]
GN[i0919-Laerthd(B) IGS]PW[i0919]PB[Laerthd]WR[8k]BR[11k]DT[2017-09-30]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: i0919 vs Laerthd]PC[IGS: igs.joyjoy.net 6969]US[Brought to you by IGS PANDANET]AB[dd][pd][dp]C[When a 3H game goes lost, we can try to find moves that "lost a move".
You found two: 60 and 126. Good analysis.
Another one is as early as move 20. Small life in gote and being sealed in is really unacceptable in that situation.
Other than that there's a clear theme to be found in moves 30, 70 and 74
When your opponent threatens to cut, always consider if you can strengthen the part that will be cut off and whether the cut is then still a problem.
The fact that all these connections were empty triangles, should make you very critical, almost sick of playing that move and as such look for alternatives.]RE[W+0.50]LT[]NB[18]NW[21]RR[Normal]
;W[pp]WL[58]
;B[nq]BL[56]
;W[jp]WL[53]
;B[qq]BL[52]
;W[pq]WL[45]
;B[qp]BL[50]
;W[po]WL[37]
;B[pr]BL[49]
;W[or]WL[31]
;B[qr]BL[48]
;W[oq]WL[30]
;B[qn]BL[48]
;W[pf]WL[21]
;B[nc]BL[37]
;W[qi]WL[14]
;B[qf]BL[27]
;W[ql]WL[2]
;B[pg]BL[9]
;W[ro]WL[596]
(;B[rp]BL[5]C[See var]
;W[qo]WL[585]
;B[rr]BL[584]C[White tricks you into small life in the corner. I think you should develop the mentality to rather die gloriously with your group than accept such small life in gote. If you do, you may discover that you shouldn't die at all and keeping White separated on a large scale is an indirect way of living with your group]
;W[of]WL[540]
;B[qe]BL[575]
;W[og]WL[529]
;B[ph]BL[572]
;W[oh]WL[509]
;B[pi]BL[571]
;W[rh]WL[506]
(;B[qg]BL[566]C[This was a mistake I think.
KW: yes. Whenever you connect with an empty triangle, you should look for a better way to connect or ... consider not connecting
see variations]
;W[oi]WL[488]
;B[qj]BL[559]C[Here I was trying to kill these 2 stones which is too small]
;W[rj]WL[468]
;B[oj]BL[557]
;W[qk]WL[464]
;B[pj]BL[556]
;W[kc]WL[446]
(;B[hc]BL[534]
;W[kf]WL[406]
;B[ld]BL[525]
;W[kd]WL[388]
;B[le]BL[524]
;W[ke]WL[384]
;B[mg]BL[519]
;W[mi]WL[375]
;B[lh]BL[501]
;W[nj]WL[332]
;B[ol]BL[429]C[Trying to keep white separated
KW; good]
;W[pm]WL[312]
;B[nk]BL[424]C[I think this only help white but I don't know what to play]
;W[mk]WL[309]
;B[ml]BL[422]
;W[lk]WL[305]
;B[kh]BL[412]C[KW: not bad at all! You take the weakness into account of your shape, while separating.]
;W[if]WL[294]
;B[ge]BL[409]
;W[jg]WL[274]
;B[jh]BL[404]
;W[ih]WL[272]
(;B[id]BL[399]C[This was a bad move, I thought I was poking an eye but it doesn't poke it and it is not the time to do it]
;W[lf]WL[266]
;B[mf]BL[398]C[I read the cut when the marked group was weak and thought I could deal with it but now that white is strong I have a problem]
;W[me]WL[265]
;B[ne]BL[389]
;W[md]WL[263]
(;B[lc]BL[386]
;W[mc]WL[262]
;B[nd]BL[351]
;W[lb]WL[590]
(;B[nf]BL[350]C[When connecting 1 weak group with 1 strong group, consider reinforcing the weak group instead and achieve multiple purposes.
See var]
;W[nb]WL[581]C[This move I don't understand. It is small for white no? I was not sure if I could tenuki so I responded]
;B[ob]BL[597]
;W[mh]WL[556]
(;B[lg]BL[593]C[and again]
;W[ll]WL[549]
;B[mm]BL[589]
;W[mo]WL[522]
;B[fq]BL[584]
;W[cf]WL[515]
;B[ch]BL[517]
(;W[ef]WL[492]
(;B[ee]BL[507]C[This is bad I think. White will be happy to reinforce these 2 stones]
;W[dg]WL[476]
;B[ck]BL[502]
;W[bd]WL[472]
;B[cc]BL[501]
;W[bc]WL[470]
(;B[ff]BL[498]
;W[fg]WL[456]
;B[gg]BL[492]
;W[fh]WL[411]
;B[cp]BL[489]
;W[hf]WL[408]
;B[gf]BL[487]
;W[he]WL[402]
;B[gd]BL[478]C[Good.]
;W[ib]WL[374]
;B[hb]BL[475]
;W[ic]WL[371]C[I wasn't sure if I had to reply]
(;B[hd]BL[468]
;W[cb]WL[363]
;B[db]BL[467]
;W[cd]WL[357]
;B[dc]BL[465]
;W[bb]WL[314]
(;B[ek]BL[457]C[KW: good. You are still at least a move ahead.]
;W[fa]WL[309]
;B[fb]BL[454]
;W[ha]WL[286]
(;B[ea]BL[452]
;W[dl]WL[244]
;B[dk]BL[448]
;W[dn]WL[242]
(;B[el]BL[443]
;W[em]WL[240]
;B[cl]BL[442]
(;W[dm]WL[239]
;B[bn]BL[440]
;W[hq]WL[552]
;B[go]BL[435]
;W[gm]WL[548]
(;B[hk]BL[562]
;W[im]WL[526]
;B[io]BL[561]
;W[jo]WL[516]
(;B[ii]BL[540]C[Not sure this is worth any points]
;W[lm]WL[458]C[White links up his groups and the game has become close enough to be decided in the endgame.]
;B[rg]BL[536]
;W[hp]WL[441]
;B[fn]BL[477]
;W[fm]WL[431]
;B[ho]BL[474]
;W[hl]WL[374]
;B[bg]BL[469]
;W[bf]WL[365]
(;B[dh]BL[458]
;W[de]WL[335]
;B[fd]BL[410]
;W[fr]WL[300]
;B[er]BL[408]
;W[gr]WL[269]
;B[os]BL[403]
;W[ns]WL[261]
;B[ps]BL[401]
;W[nr]WL[260]
;B[so]BL[400]
;W[sn]WL[252]
;B[sp]BL[397]
;W[rn]WL[246]
;B[om]BL[395]
;W[on]WL[235]
;B[ga]BL[384]
;W[pk]WL[200]
;B[ok]BL[379]
;W[fp]WL[169]
(;B[ep]BL[362]
;W[gp]WL[156]
;B[ia]BL[347]
;W[jb]WL[152]
;B[na]BL[346]
;W[mb]WL[142]
;B[ei]BL[307]
;W[gk]WL[128]
;B[hj]BL[302]
;W[gj]WL[120]
;B[hh]BL[300]
;W[ig]WL[118]
;B[jk]BL[297]
;W[jl]WL[535]
;B[sh]BL[289]
;W[mn]WL[470]
;B[si]BL[541]
;W[sj]WL[443]
;B[es]BL[528]
;W[eo]WL[437]
;B[kj]BL[515]
;W[cm]WL[396]
;B[bm]BL[513]
;W[ri]WL[347]
;B[sg]BL[510]
;W[ma]WL[308]
;B[oa]BL[484]
;W[ag]WL[299]
;B[ah]BL[482]
;W[co]WL[255]
;B[bo]BL[479]
;W[af]WL[233]
;B[eh]BL[478]
;W[cg]WL[219]
;B[bh]BL[475]
;W[fi]WL[185]
;B[fj]BL[469]
;W[fk]WL[182]
;B[ej]BL[461]
;W[gh]WL[180]
;B[eg]BL[455]
;W[gi]WL[172]
;B[df]BL[454]
;W[ce]WL[171]
;B[li]BL[420]
;W[hg]WL[135]
;B[hi]BL[415]
;W[fl]WL[102]
;B[je]BL[411]
;W[kk]WL[87]
;B[lj]BL[406]
;W[mj]WL[83]
;B[ik]BL[404]
;W[gq]WL[51]
;B[eq]BL[403]
;W[pe]WL[46]
;B[oe]BL[399]
;W[ng]WL[37]
;B[nn]BL[374]
;W[no]WL[35]
;B[nm]BL[372]
;W[qd]WL[20]
;B[qc]BL[368]
;W[rd]WL[598]
;B[rc]BL[365]
;W[re]WL[583]
;B[sd]BL[589]
;W[ja]WL[563]
;B[ha]BL[585]
;W[ca]WL[511]
;B[fs]BL[509]
;W[gs]WL[506]
;B[jd]BL[479]
;W[il]WL[456]
;B[pl]BL[473]
;W[qm]WL[445]
;B[cn]BL[388]
;W[do]WL[442]
(;B[qh]BL[350]
;W[rk]WL[437]
;B[se]BL[347]
;W[ef]WL[398]
;B[jf]BL[345]
;W[kg]WL[394]
;B[df]BL[341]
;W[pc]WL[369]
;B[od]BL[335]
;W[ef]WL[363]
;B[ni]BL[323]
;W[nh]WL[361]
;B[df]BL[317]
;W[pb]WL[323]
;B[oc]BL[316]
;W[ef]WL[320]
;B[ip]BL[314]
;W[iq]WL[252]
;B[df]BL[312]
;W[sf]WL[233]
;B[rf]BL[308]
;W[ef]WL[231]
;B[fo]BL[304]
;W[jq]WL[209]
;B[df]BL[302]
;W[jj]WL[201]
;B[ji]BL[300]
;W[ef]WL[196]
;B[oo]BL[272]
;W[op]WL[194]
;B[df]BL[271]
;W[bq]WL[187]
;B[bp]BL[268]
;W[ef]WL[184]
;B[hm]BL[258]
;W[df]WL[535]
;B[jc]BL[243]
;W[]WL[535]
;B[da]BL[598]
;W[]WL[535]
;B[ie]BL[595]
;W[]WL[535]
;B[]BL[594]
;W[]WL[535]C[
Laerthd 11k : Laerthd dead @ Q18
i0919 8k : i0919 dead @ J5
Laerthd 11k : Laerthd dead @ K10
i0919 8k : i0919 dead @ H7
i0919 8k : i0919 dead @ O3
Laerthd 11k : Laerthd dead @ B3
i0919 8k : i0919 dead @ R6
Laerthd done
Laerthd done
]
;TW[aa][ba][ka][la][ab][kb][ac][lc][ad][ld][ae][be][le][ni][sk][gl][kl][rl][sl][hm][jm][km][rm][sm][en][fn][gn][hn][in][jn][kn][ln][pn][qn][fo][go][ho][io][ko][lo][oo][ip][kp][lp][mp][np][kq][lq][mq][nq][hr][ir][jr][kr][lr][mr][hs][is][js][ks][ls][ms]TB[fa][pa][qa][ra][sa][eb][gb][pb][qb][rb][sb][ec][fc][gc][pc][sc][ed][qd][rd][fe][re][sf][ai][bi][ci][di][ki][aj][bj][cj][dj][ij][jj][ak][bk][al][bl][nl][am][an][ao][ap][aq][bq][cq][dq][rq][sq][ar][br][cr][dr][sr][as][bs][cs][ds][qs][rs][ss]OS[])
(;B[ef]))
(;B[gp]
(;W[gq]
;B[eq])
(;W[eo]
;B[ep]
;W[fo]
;B[gq])))
(;B[gr]))
(;B[gh]
;W[fi])
(;B[gr])
(;B[bg]))
(;B[io]C[This was better I think]
;W[jo]
;B[im]
;W[hn]
;B[ho]
;W[in]
;B[jn]
;W[jm]
;B[kn]
;W[il]
;B[km]
;W[jl]
;B[mn]))
(;W[gn]
;B[dm]
;W[hq]))
(;B[fn]
;W[fm]
;B[em]
;W[en]
;B[gm]
;W[fl]
;B[el]
;W[fo]
;B[gn]
;W[ep]
;B[eq]))
(;B[iq]C[Once again, I should have played here]
(;W[eb]
;B[ec]
;W[ea])
(;W[fc]
;B[gb]
;W[fd]
;B[ea])
(;W[gb]
(;B[gc]
;W[ga]
;B[ea]
;W[ia])
(;B[fd]
;W[fc]
;B[ec]
;W[eb]
;B[gc]
;W[fb]
;B[da]
;W[ga]
;B[ea]
;W[ia]))))
(;B[ej]C[a bit better?]))
(;B[iq]
;W[hd]
;B[fc]
;W[jq]))
(;B[iq]C[I should have played here]))
(;B[bd]
;W[cj]
;B[eh]
;W[gf]
;B[ej]))
(;W[cc]C[I expected this]
;B[dc]
;W[cd]
;B[de]
;W[bf]
;B[eg]))
(;B[jj]
;W[lg]
;B[jl]))
(;B[jj]
;W[nf]
;B[jl]
;W[ll]
;B[mm]))
(;B[nd]
;W[mc]))
(;B[lf]))
(;B[md]
;W[hc]C[I was not sure if trying to disconnect directly was good, white only has one weak group]))
(;B[rg]C[I wanted to play there but did not want ot have to respond to white once again. But that is a dumb reason, should have played there
KW: see my var]
;W[qh]
;B[qg])
(;B[pj]
;W[qg]C[This is bad shape for White]
;B[nj]))
(;B[qo]
;W[rn]
(;B[rp]LB[rm:A][rr:B]C[you can still live
but more importantly ...])
(;B[qm]
;W[rm]
(;B[pl]C[if you fear the cut, see var]
;W[qk]
;B[om]C[you can build up some strength in the centre
you have 1 eye in the corner but at this point that is nothing to worry about
])
(;B[om]
;W[pl]
;B[on]
;W[np]C[even this is still better than the game]))))