100: endgame starts or ... where's the weakest group
176: I see that this kind of move makes all the above irrelevant. If you make blunders like these regularly, then there is no point indeed in improving your knowledge.
I'd say: play the next 10 games with the SPECIFIC SINGLE goal of not making such blunders
1. generate awareness that we're beyond move 100 and liberties become scarce, and connections fragile.
2. count liberties of your chains regularly, especially those where a stone has been played
3. inspect connections regularly. Look at diagonal connections in particular, or other non-straight connections.
See how many of those games you could end without losing big chains/groups. Every such game is a success, regardless of end score. Give yourself a score, like 8/10. Then you know that you will continue to lose 20% of your games due to blunders. Unacceptable? Repeat.
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.50]TM[1500]OT[5x30 byo-yomi]
PW[me]PB[the other guy]WR[4k]BR[5k]DT[2016-09-19]PC[The KGS Go Server at
http://www.gokgs.com/]RE[B+Resign]
;B[pd]BL[1486.364]
;W[dp]WL[1484.767]
;B[pp]BL[1480.26]
;W[dd]WL[1480.547]
;B[fq]BL[1475.478]
(;W[jp]WL[1465.655]C[I wanted to play for influence
KW: I used to pincer myself all the time. Following the video lectures by Dwyrin, I have come to appreciate the simplicity of "backing off".]
;B[cn]BL[1465.004]
;W[dn]WL[1458.151]
;B[dm]BL[1462.103]
;W[en]WL[1456.101]
;B[co]BL[1458.898]
;W[cp]WL[1425.228]C[KW: White is prepared to sacrifice two stones]
;B[gn]BL[1446.058]C[And then this. He is surrounding me and threatening to cut off my stone. I didn't see this coming, and don't know how to deal with it, particularly, I don't know how to not give up influence.
KW]
(;W[fp]WL[1409.095]C[this is good shape, the table shape]
;B[gp]BL[1440.151]C[it provokes a natural hane]
;W[gq]WL[1357.245]C[the crosscut is active]
;B[ep]BL[1428.283]
;W[fo]WL[1352.31]
;B[go]BL[1401.374]
;W[eq]WL[1319.839]
;B[fr]BL[1372.128]
;W[hq]WL[1308.15]C[you maintain connection]
;B[fn]BL[1362.751]
;W[eo]WL[1299.902]
;B[em]BL[1357.405]C[This looks ok to me for both sides, though I would have wanted to have the black position and I didn't get it.
KW: indeed. Also, White has bad aji. See var 1.
Seems like it already went wrong at the table shape. This, even as a dan player, is hard to foresee.]
(;W[cm]CR[do]WL[1248.781]TR[dm][cn][co]SQ[cm][dn]C[My original intent was just to create an irritation that would make him have to come back and fix this. Instead, I misread the whole sequence thinking wrongly that I could capture, and gave him more influence in the bargain.

KW: ok. This is indeed not 1d level.
For me though, it's a nobrainer, not because I read it but because I "know". Sometimes I forget and then I read.
I 'know" that the squared cut of the triangled formation does not work when there is a liberty. Only when the circled liberty is also occupied, the cut works (but Black may still crawl)
]
;B[cl]BL[1349.516]
;W[bm]WL[1237.671]
;B[bl]BL[1341.179]
;W[bn]WL[1227.964]C[I simply misread this
KW: when reading, try to do the liberty proof, on top of reading out the sequence.
]
;B[bo]BL[1335.716]C[It's 3-2]
;W[bp]WL[1208.724]C[KW: you do win something though: the aji has gone!]
;B[am]BL[1330.863]
;W[cf]WL[1199.018]C[Here, I wanted to do something to mitigate the thickness that he has built. Is this a good idea of a bad one? I don't know. It does seem that there are bigger areas though...
KW: perfectly ok]
;B[lq]BL[1315.541]C[KW: Black overplays. These white stones are fairly strong]
;W[qn]WL[1194.248]
;B[jr]BL[1301.421]
;W[er]WL[1167.411]
;B[ip]BL[1264.193]
(;W[nq]WL[1128.6]C[KW: why come here, Black invested a lot in this area. See var.]
;B[pn]BL[1252.45]
;W[pm]WL[1120.293]
;B[on]BL[1246.756]
(;W[lp]WL[1106.259]C[KW: see var]
;B[iq]BL[1165.89]
;W[kq]WL[1086.159]
;B[kr]BL[1147.197]
;W[lr]WL[1082.076]
;B[mq]BL[1141.963]
;W[mp]WL[1076.774]
;B[mr]BL[1139.181]
;W[nr]WL[1071.488]
;B[ls]BL[1133.928]
;W[op]WL[1068.455]
;B[pq]BL[1121.584]
;W[po]WL[1056.594]
;B[qo]BL[1065.567]
;W[oo]WL[1052.841]
;B[nn]BL[1061.444]
;W[qp]WL[1050.771]
;B[ro]BL[1055.438]
;W[qq]WL[1031.991]
;B[qm]BL[1043.951]C[Here, I achieved my goal of not letting him shut off the whole bottom area, but it seems a questionable goal. I was happy to have lived, but it doesn't seem like a good result. His influence is as good as ever.
KW: at least your operations were consistent. Indeed, he took the cherished influence.]
;W[jc]WL[1016.065]
;B[je]BL[964.312]
;W[jg]WL[991.446]C[I felt I had to get some stones in the center
KW: I wouldn't]
;B[ic]BL[939.987]
(;W[ke]WL[920.746]C[KW: these moves are not part of a regular dan repertoire.]
;B[jd]BL[926.629]
;W[kd]WL[917.976]
;B[kc]BL[904.829]
(;W[lc]WL[916.225]C[KW: regular dan instinct is to increase the sacrifice, see var
(perhaps not good here)]
;B[jb]BL[901.593]
;W[kf]WL[909.865]
;B[me]BL[888.652]
;W[md]WL[906.221]
;B[lb]BL[865.104]C[????]
;W[mb]WL[895.831]
;B[nc]BL[850.014]
;W[la]WL[878.628]C[force before connecting, good dan move]
;B[kb]BL[845.705]
;W[mc]WL[877.182]
;B[nd]BL[841.335]
;W[mg]WL[854.592]
;B[nf]BL[825.964]
;W[ng]WL[825.577]
;B[og]BL[820.14]
;W[oh]WL[824.262]
;B[ph]BL[813.436]
;W[pg]WL[820.621]
;B[of]BL[810.583]
;W[pi]WL[819.22]
;B[qh]BL[807.039]
;W[oi]WL[813.407]
;B[fc]BL[775.286]
;W[qi]WL[809.734]
;B[rg]BL[757.706]
;W[ec]WL[805.531]C[Here I felt that I had mitigated his influence a bit, and the game feels fairly close
KW: I have bo objection against the flow of your moves. In particular the last two are perfectly timed as far as I'm concerned]
;B[fd]BL[753.236]C[KW: Arguably we're in the endgame now and big endgame must be considered;
The weakest group on the board is Black's former big influential string. Can it be attacked? See var]
(;W[di]WL[787.738]LB[fb:B][ob:C][ch:A]C[the suggested middle game move aside, I'd prefer A here or B or C in terms of big endgame]
;B[mi]BL[729.949]
;W[mh]WL[782.251]
;B[ki]BL[718.909]C[I want to attack these two black stones, but I also feel that my stones are weak. Not sure how to go about it.]
(;W[lh]WL[739.564]C[KW: empty triangles are no go for me]
;B[nj]BL[691.258]
;W[ql]WL[731.673]
;B[rn]BL[687.048]
;W[rh]WL[708.293]
;B[qg]BL[682.894]
;W[ob]WL[694.647]
;B[nb]BL[678.231]
;W[na]WL[692.816]
;B[pb]BL[673.412]
;W[pa]WL[652.844]
;B[qb]BL[665.467]
;W[hg]WL[631.143]
;B[de]BL[645.599]C[getting territory early and then watching it shrink are regular features of my games.
KW: really? This is a thank you move.]
;W[cd]WL[623.732]
;B[ce]BL[623.505]
;W[be]WL[618.552]
;B[df]BL[517.548]
;W[cg]WL[600.425]
;B[ed]BL[502.533]
;W[cc]WL[549.311]C[KW: empty triangle? Why?]
;B[eb]BL[496.105]
;W[ff]WL[545.344]
;B[eg]BL[470.884]
;W[ef]WL[526.664]
;B[fg]BL[437.908]
;W[gf]WL[516.043]
;B[dg]BL[427.183]
;W[ch]WL[488.882]
;B[ei]BL[416.939]
;W[ii]WL[478.936]
;B[jj]BL[398.379]
;W[ji]WL[467.314]
;B[ij]BL[378.065]
;W[kh]WL[460.355]C[I'm basically alive, but well behind. Later I blundered but it didn't matter much anyway. Last comment.]
;B[li]BL[373.815]
;W[ol]WL[442.692]
;B[nl]BL[362.895]
;W[ok]WL[434.771]
;B[nk]BL[359.013]
;W[ln]WL[430.45]
;B[ko]BL[317.749]
;W[kn]WL[414.221]
;B[jo]BL[313.47]
;W[mn]WL[410.598]
;B[nm]BL[298.692]
;W[ej]WL[398.69]
;B[fi]BL[293.837]
;W[cj]WL[345.365]
;B[fj]BL[284.917]
;W[db]WL[340.93]
;B[dc]BL[279.242]
;W[oc]WL[289.858]
;B[od]BL[271.368]
;W[hj]WL[275.696]
;B[hk]BL[260.258]
;W[hi]WL[221.646]
;B[ek]BL[239.324]
;W[rl]WL[217.407]
;B[ri]BL[228.265]
;W[rj]WL[215.979]
;B[sh]BL[225.459]
;W[ec]WL[212.759]
;B[hp]BL[219.743]
;W[gr]WL[208.997]
;B[dc]BL[216.163]
;W[hd]WL[178.489]
;B[he]BL[199.17]
;W[ge]WL[174.361]
;B[hf]BL[168.213]
;W[if]WL[162.84]
;B[ie]BL[163.68]
;W[gd]WL[161.332]
;B[gg]BL[152.231]C[KW: this is the blunder you want to avoid
end of comment]
;W[cb]WL[140.641]
;B[rp]BL[119.9]
;W[pr]WL[121.851]
;B[rr]BL[111.258]
;W[qr]WL[111.412]
;B[rq]BL[102.558]
;W[no]WL[102.907]
;B[lo]BL[90.236]
;W[mo]WL[87.581]
;B[jn]BL[85.133]
;W[ll]WL[83.824]
;B[kl]BL[76.441]
;W[km]WL[74.814]
;B[jm]BL[71.642]
;W[gj]WL[68.525]
;B[gk]BL[67.346]
;W[qa]WL[50.879]
;B[ra]BL[54.898]
;W[oa]WL[49.196]
;B[pc]BL[48.739]
;W[ma]WL[46.703]
;B[sb]BL[41.814]
;W[do]WL[4.656]
;B[an]BL[36.332]
;W[ap]WL[0.74]
;B[ai]BL[19.956]
;W[bi]WL[30]OW[5]
;B[ak]BL[9.441]
;W[ah]WL[30]OW[5]
;B[aj]BL[6.149]
;W[ea]WL[30]OW[5]
;B[fa]BL[30]OB[5]
;W[da]WL[30]OW[5]
;B[rm]BL[30]OB[5]
;W[sl]WL[30]OW[5])
(;W[hg]C[you can defend (one space jump) before attacking])
(;W[ii]C[or attack (keima)]))
(;W[rm]
(;B[ql]
;W[rn]C[big mistake by black])
(;B[rn]
;W[ql]C[either this is a big ko
or]
;B[qn]
;W[rl]C[Black gets a lump])))
(;W[jb]
;B[lc]
;W[jf]
;B[ib]
;W[he]
;B[id]
;W[md]C[KW: if influence is what matters here ...]))
(;W[ib]C[hane]
;B[id]
;W[hb]))
(;W[qp]
;B[qo]
;W[ro]
;B[po]
;W[rm]
;B[qq]
;W[rp]C[KW: Black has the bad aji now]))
(;W[rp]
;B[qq]
;W[qk]))
(;W[nc]
;B[er]
;W[dr]
;B[bp]
;W[bq]
;B[do]
;W[ep]
;B[cq]
;W[dq]
;B[cr]))
(;W[em]C[this would be the natural move]
;B[dl]C[but Black makes territory naturally and also ...]
;W[nc]
;B[do]C[now Black can cut]
;W[ep]
;B[eo]
;W[fp]
;B[fo]
;W[gp]C[still ok though])
(;W[ep]LB[cm:A][em:B][go:C]C[You can simply make a bamboo joint. Black has many cutting points now.]))
(;W[cn]
;B[jp]
;W[qf]
;B[nc]
;W[rd]
;B[qc]
;W[qi]C[KW: the games are duller this way but more easy to understand]))