Some comments from me as well. Same grain of salt : )
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[6.50]TM[1500]OT[3x30 byo-yomi]
PW[me]PB[opponent]WR[7k]BR[6k]DT[2013-10-13]PC[The KGS Go Server at
http://www.gokgs.com/]RE[W+4.50]
;B[pd]BL[1473.337]
;W[pq]WL[1484.925]LB[po:A]C[SoDesuNe:
As Boidhre pointed out, this makes A a very good move for Black. Approaching the corner while simultanously extending from the star-point.
In the book "Direction of Play", this White move is described as "lost the game" ; )
"Direction of Play" also recommends to approach A immediately. This might be a matter of style but it isn't bad.]
;B[dq]BL[1450.086]
;W[cd]WL[1468.754]C[SoDesuNe:
Same.]
;B[po]BL[1417.107]
;W[np]WL[1376.479]LB[qo:B][jq:A]TR[np][dq]C[SoDesuNe:
These two stones don't have a good relation for White. D3 means you don't have good prospects on the lower side.
Besides, I rarely see this move (this Joseki) these days when White does not have a stone around A.
I would have played B.]
;B[qq]BL[1384.072]
;W[qr]WL[1347.548]
;B[qp]BL[1375.322]
;W[or]WL[1329.715]
;B[pl]BL[1365.736]C[SoDesuNe:
Playing this on the third line is more common because it makes a solid base.]
;W[do]WL[1310.188]LB[nc:A][ed:B]C[SoDesuNe:
I would think the top is more important and play A. Once Black can play around B he can make a double-wing-framework.]
;B[co]BL[1361.596]
;W[cn]WL[1305.239]
;B[cp]BL[1360.159]
;W[dn]WL[1296.163]
;B[gq]BL[1358.951]LB[fq:A]C[SoDesuNe:
A is Joseki. See explanation later (move 42).]
;W[cj]WL[1279.946]LB[dj:A]C[SoDesuNe:
I would prefer high at A.]
;B[ed]BL[1349.079]
;W[dc]WL[1253.398]LB[ec:C][hd:B][df:A]C[SoDesuNe:
Now A would be a better move.
But I would prefer to pincer (two-space-high at B). A puts too much emphasis on the left side. You have already quite some stones there. A pincer prevents Black's double-wing-framework.
This move is, as Boidhre correctly says mostly wrong because you just strenghten Black. If you want to defend the corner then C is the move.]
;B[ec]BL[1347.111]
;W[cf]WL[1141.009]TR[cf][cj]C[SoDesuNe:
Both low. Your left side has not much potential left.]
;B[ic]BL[1344.161]TR[ec][ic][ed][pd][pl]C[SoDesuNe:
Black on the other side has good potential.]
;W[qf]WL[1093.936]LB[qc:B][qj:A]C[SoDesuNe:
You can also think about attacking Black's group at A, inducing some sort of running fight in the center and aiming for B.]
;B[qh]BL[1332.122]
;W[qc]WL[1083.549]LB[nc:B][nd:A]C[SoDesuNe:
You can also think about double-approaching at A or B.]
;B[pc]BL[1330.271]
;W[qd]WL[1079.321]
;B[pe]BL[1329.056]
;W[rf]WL[1047.43]
;B[ld]BL[1326.547]LB[og:A]C[SoDesuNe:
A is the Joseki move to cover the cutting points.]
;W[qj]WL[1021.384]LB[pb:B][pf:A]TR[rf]C[SoDesuNe:
I would simply play A. Your corner group is alive and due to the marked stone Black has an open skirt, so the right side is not interesting right now. Playing at the head of three stones is better. Later you might have a play around B (shortage of liberty for Black).]
;B[pj]BL[1323.623]
;W[qi]WL[1012.71]
;B[pi]BL[1321.772]
;W[rh]WL[1006.621]
;B[qk]BL[1319.574]
;W[rk]WL[978.986]LB[pf:A]C[SoDesuNe:
Still A, this is too small.]
;B[rl]BL[1312.386]
;W[ph]WL[961.398]LB[rj:A]TR[rk]C[SoDesuNe:
Now Black can capture at A anytime he wants. So why play the marked move? Overall you lost Sente, too.]
;B[jq]BL[1271.308]C[SoDesuNe:
Quite big.]
;W[eq]WL[926.645]TR[jq]C[SoDesuNe:
Now that Black has the marked stone, his position is much more solid.]
;B[er]BL[1264.557]
(;W[qm]WL[868.629]LB[rj:A]C[SoDesuNe:
See variation.
This move does not do anything. Black can just capture at A.]
;B[ql]BL[1255.364]
;W[dr]WL[761.623]
;B[fq]BL[1204.466]
;W[cq]WL[699.918]
;B[dp]BL[1195.656]
;W[bq]WL[682.502]
;B[ep]BL[1087.744]
;W[rr]WL[643.251]LB[cs:A]C[SoDesuNe:
A makes life (tripod-group) and is much bigger then this move.]
;B[bp]BL[998.055]C[SoDesuNe:
Now it's dead.]
;W[rm]WL[619.796]
;B[rj]BL[994.3]
;W[ri]WL[579.814]
;B[sk]BL[992.19]
;W[so]WL[573.279]
;B[ro]BL[987.174]
;W[sp]WL[539.448]
;B[sq]BL[984.355]
;W[rq]WL[532.019]
;B[sn]BL[980.971]
;W[rp]WL[528.045]
;B[rn]BL[978.59]
;W[ej]WL[419.643]LB[pf:B][bn:A]C[SoDesuNe:
Black has A and thus huge endgame on this side. So this move does not gain much. Territorily-wise A would be better but I still thiink you should play at B.
Black has the edge though.
END OF COMMENTS.]
;B[fn]BL[965.577]
;W[jo]WL[377.274]
;B[io]BL[953.487]
;W[jm]WL[296.55]
;B[in]BL[942.902]
;W[jn]WL[283.455]
;B[no]BL[941.34]
;W[mo]WL[276.199]
;B[nn]BL[940.019]
;W[im]WL[259.44]
;B[ef]BL[920.891]
;W[if]WL[214.983]
;B[he]BL[911.81]
;W[jd]WL[204]
;B[jc]BL[910.006]
;W[kd]WL[196.358]
;B[kc]BL[907.377]
;W[le]WL[193.742]
;B[md]BL[904.974]
;W[qb]WL[187.952]
;B[pb]BL[901.841]
;W[db]WL[177.104]
;B[eb]BL[899.085]
;W[oh]WL[170.82]
;B[nj]BL[892.058]
;W[mi]WL[148.884]
;B[ni]BL[887.335]
;W[nh]WL[142.697]
;B[mj]BL[879.927]
;W[li]WL[136.597]
;B[me]BL[878.585]
;W[lf]WL[130.553]
;B[ie]BL[876.239]
;W[je]WL[107.73]
;B[hf]BL[874.01]
;W[ig]WL[105.182]
;B[hg]BL[848.163]
;W[ih]WL[86.544]
;B[qa]BL[838.793]
;W[hh]WL[71.442]
;B[dk]BL[728.548]
;W[ek]WL[48.661]
;B[ck]BL[701.631]
;W[dj]WL[33.989]
;B[dl]BL[673.917]
;W[el]WL[0.49]
;B[dm]BL[663.854]
;W[em]WL[30]OW[3]
;B[cm]BL[646.534]
;W[bn]WL[30]OW[3]
;B[bj]BL[579.795]
;W[bi]WL[30]OW[3]
;B[bk]BL[568.523]
;W[bm]WL[30]OW[2]
;B[en]BL[552.412]
;W[aj]WL[30]OW[2]
;B[ak]BL[543.082]
;W[ai]WL[30]OW[2]
;B[eo]BL[518.624]
;W[aq]WL[30]OW[2]
;B[bo]BL[457.927]
;W[al]WL[30]OW[1]
;B[da]BL[440.981]
;W[ca]WL[30]OW[1]
;B[ea]BL[438.677]
;W[cb]WL[30]OW[1]
;B[qe]BL[437.551]
;W[re]WL[30]OW[1]
;B[rb]BL[431.861]
;W[rc]WL[30]OW[1]
;B[sc]BL[428.738]
;W[rd]WL[30]OW[1]
;B[lq]BL[407.163]
;W[bs]WL[30]OW[1]
;B[cr]BL[381.548]
;W[ds]WL[30]OW[1]
;B[es]BL[364.625]
;W[cs]WL[30]OW[1]
;B[mf]BL[344.28]
;W[gm]WL[30]OW[1]
;B[kk]BL[339.395]
;W[jj]WL[30]OW[1]
;B[jk]BL[318.704]
;W[ik]WL[30]OW[1]
;B[kj]BL[285.316]
;W[ji]WL[30]OW[1]
;B[fm]BL[281.385]
;W[fl]WL[30]OW[1]
;B[gh]BL[277.929]
;W[gi]WL[30]OW[1]
;B[fh]BL[273.666]
;W[dh]WL[30]OW[1]
;B[fi]BL[270.807]
;W[ip]WL[30]OW[1]
;B[jp]BL[266.976]
;W[ho]WL[30]OW[1]
;B[hp]BL[238.096]
;W[hn]WL[30]OW[1]
;B[iq]BL[236.896]
;W[mn]WL[30]OW[1]
;B[mm]BL[234.668]
;W[lm]WL[30]OW[1]
;B[ll]BL[213.464]
;W[nm]WL[30]OW[1]
;B[ml]BL[211.625]
;W[pn]WL[30]OW[1]
;B[om]BL[179.409]
;W[oo]WL[30]OW[1]
;B[on]BL[177.167]
;W[qo]WL[30]OW[1]
;B[qn]BL[172.313]
;W[pp]WL[30]OW[1]
;B[op]BL[147.166]
;W[qo]WL[30]OW[1]
;B[qp]BL[146.007]
;W[ls]WL[30]OW[1]
;B[kr]BL[135.826]
;W[mr]WL[30]OW[1]
;B[mp]BL[124.581]
;W[ks]WL[30]OW[1]
;B[js]BL[119.818]
;W[lo]WL[30]OW[1]
;B[nq]BL[97.321]
;W[mg]WL[30]OW[1]
;B[nr]BL[68.078]
;W[ns]WL[30]OW[1]
;B[lr]BL[64.823]
;W[ms]WL[30]OW[1]
;B[mq]BL[63.346]
;W[os]WL[30]OW[1]
;B[km]BL[55.335]
;W[eg]WL[30]OW[1]
;B[fg]BL[47.15]
;W[oi]WL[30]OW[1]
;B[oj]BL[30.517]
;W[nf]WL[30]OW[1]
;B[ne]BL[27.599]
;W[df]WL[30]OW[1]
;B[de]BL[30]OB[3]
;W[fj]WL[30]OW[1]
;B[eh]BL[30]OB[3]
;W[dg]WL[30]OW[1]
;B[ki]BL[30]OB[3]
;W[kh]WL[30]OW[1]
;B[id]BL[30]OB[3]
;W[ei]WL[30]OW[1]
;B[ff]BL[30]OB[3]
;W[jf]WL[30]OW[1]
;B[of]BL[30]OB[3]
;W[go]WL[30]OW[1]
;B[ce]BL[30]OB[2]
;W[be]WL[30]OW[1]
;B[dd]BL[30]OB[2]
;W[cc]WL[30]OW[1]
;B[ng]BL[30]OB[2]
;W[gp]WL[30]OW[1]
;B[io]BL[30]OB[2]
;W[sd]WL[30]OW[1]
;B[ra]BL[30]OB[2]
;W[kn]WL[30]OW[1]
;B[ln]BL[30]OB[2]
;W[jl]WL[30]OW[1]
;B[kl]BL[30]OB[2]
;W[lj]WL[30]OW[1]
;B[lk]BL[30]OB[2]
;W[si]WL[30]OW[1]
;B[sj]BL[30]OB[2]
;W[pf]WL[30]OW[1]
;B[kp]BL[30]OB[2]
;W[og]WL[30]OW[1]
;B[ko]BL[30]OB[2]
;W[lm]WL[30]OW[1]
;B[am]BL[30]OB[2]
;W[an]WL[30]OW[1]
;B[ln]BL[30]OB[2]
;W[sm]WL[30]OW[1]
;B[pm]BL[30]OB[2]
;W[lm]WL[30]OW[1]
;B[br]BL[30]OB[2]
;W[ar]WL[30]OW[1]
;B[ln]BL[30]OB[2]
;W[is]WL[30]OW[1]
;B[jr]BL[30]OB[2]
;W[lm]WL[30]OW[1]
;B[rg]BL[30]OB[2]
;W[qg]WL[30]OW[1]
;B[ln]BL[30]OB[2]
;W[hq]WL[30]OW[1]
;B[ip]BL[30]OB[2]
;W[lm]WL[30]OW[1]
;B[sh]BL[30]OB[2]
;W[sg]WL[30]OW[1]
;B[ln]BL[30]OB[2]
;W[oe]WL[30]OW[1]
;B[nf]BL[30]OB[2]
;W[lm]WL[30]OW[1]
;B[ci]BL[30]OB[2]
;W[ch]WL[30]OW[1]
;B[ln]BL[30]OB[2]
;W[sb]WL[30]OW[1]
;B[lp]BL[30]OB[2]
;W[qq]WL[30]OW[1]
;B[qo]BL[30]OB[2]
;W[gn]WL[30]OW[1]
;B[fp]BL[30]OB[2]
;W[sc]WL[30]OW[1]
;B[pa]BL[30]OB[2]
;W[in]WL[30]OW[1]
;B[ao]BL[30]OB[2]
;W[]WL[30]OW[1]
;B[fo]BL[30]OB[2]
;W[]WL[30]OW[1]
;B[oq]BL[30]OB[2]
;W[]WL[30]OW[1]
;B[]BL[30]OB[1]TW[aa][ba][ab][bb][ac][bc][ad][bd][ae][ke][se][af][bf][kf][sf][ag][bg][cg][jg][kg][lg][pg][rg][ah][bh][jh][lh][mh][qh][sh][ci][di][hi][ii][bj][gj][hj][ij][ak][bk][ck][dk][fk][gk][hk][bl][cl][dl][gl][hl][il][am][cm][dm][hm][sq][br][cr][pr][sr][as][ps][qs][rs][ss]TB[fa][ga][ha][ia][ja][ka][la][ma][na][oa][fb][gb][hb][ib][jb][kb][lb][mb][nb][ob][fc][gc][hc][lc][mc][nc][oc][fd][gd][hd][nd][od][ee][fe][ge][oe][gf][gg][mk][nk][ok][pk][rk][nl][ol][sl][lm][nm][qm][rm][sm][mn][pn][lo][mo][oo][np][eq][hq][kq][fr][gr][hr][ir][fs][gs][hs][is])
(;AE[jq]C[SoDesuNe:
Without the second extension...]
;W[fr]
;B[fq]
;W[ep]
;B[dr]
;W[hq]C[SoDesuNe:
This is the weakness Black leaves behind.
I can recommend watching:
http://www.gocommentary.com/free-videos ... ay-03.html]))