Many thanks all, very interesting, especially your comments Bill (I'm especially pleased to see I got some of your ideas and concerns, although I completely take your point on G3)
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[AGA]SZ[19]KM[7.50]TM[1800]OT[5x30 byo-yomi]
PW[topazg]PB[Chew]BR[4k]DT[2010-10-02]PC[The KGS Go Server at http://www.gokgs.com/]RE[W+Resign]
;B[pd]BL[1791.76]
;W[pn]WL[1792.958]
;B[ep]BL[1766.833]
;W[de]WL[1788.272]
(;B[pp]BL[1714.42]
;W[np]WL[1785.08]
(;B[nq]BL[1702.885]
(;W[qq]WL[1708.979]
;B[qo]BL[1650.47]
(;W[oq]WL[1635.227]
;B[pq]BL[1639.627]
;W[pr]WL[1627.899]
;B[or]BL[1613.076]
;W[op]WL[1624.631]
;B[qr]BL[1606.235]
;W[po]WL[1623.095]
;B[qp]BL[1604.016]
;W[nr]WL[1621.825]
;B[ps]BL[1599.127]
;W[mq]WL[1620.456]
;B[qm]BL[1563.984]C[The opening is a big success for Black. Because E4 is a 5-4 stone facing the White wall, White cannot even get a good approach to make good use of his thickness.]
;W[dm]WL[1590.411]
(;B[cq]BL[1524.78]C[Safer than C4, nice idea.]
;W[gq]WL[1586.186]
;B[dj]BL[1468.879]
(;W[nc]WL[1573.276]
;B[cg]BL[1453.863]
;W[go]WL[1569.837]
;B[kc]BL[1365.425]
;W[ne]WL[1534.593]
;B[pf]BL[1361.71]
;W[hc]WL[1525.64]
;B[ke]BL[1336.286]
;W[cc]WL[1520.062]
(;B[nn]BL[1329.48]
;W[qk]WL[1517.063]
;B[oo]BL[1313.72]
(;W[pm]WL[1497.145]
(;B[pl]BL[1286.49]C[The real fight begins!]
;W[ql]WL[1484.353]
(;B[om]BL[1250.79]
;W[qn]WL[1481.278]
;B[rn]BL[1247.875]
;W[rm]WL[1477.953]
;B[on]BL[1246.789]
;W[qm]WL[1476.303]
;B[qi]BL[1221.32]
;W[pi]WL[1379.139]
(;B[ng]BL[1187.827]
(;W[qc]WL[1372.985]
;B[pc]BL[1175.322]
;W[pb]WL[1370.562]
;B[ob]BL[1173.571]
;W[qb]WL[1369.689]
;B[oc]BL[1172.713]
;W[re]WL[1369.098]
(;B[pj]BL[1131.043]
;W[qj]WL[1361.332]
;B[pk]BL[1125.146]
;W[qh]WL[1356.852]
;B[ri]BL[1114.748]
(;W[oi]WL[1348.074]C[Overplay as it turns out.]
;B[nk]BL[1107.136]
;W[pg]WL[1319.224]
;B[qf]BL[1069.942]
;W[rf]WL[1292.204]
;B[rj]BL[1039.693]
;W[ro]WL[1284.399]
;B[rp]BL[1015.207]
;W[sn]WL[1282.149]
;B[rk]BL[1009.427]
;W[sl]WL[1270.97]
(;B[rl]BL[1003.026]
;W[rh]WL[1267.396]
;B[sh]BL[943.77]
;W[sg]WL[1256.927]
;B[sj]BL[919.556]
;W[nb]WL[1244.736]
;B[of]BL[899.463]
;W[oa]WL[1207.168]
;B[ni]BL[865.745]
;W[co]WL[1199.44]
;B[cl]BL[859.499]
;W[bq]WL[1189.605]
;B[br]BL[852.898]
;W[bp]WL[1185.614]
;B[dr]BL[846.062]
;W[eo]WL[1181.139]
;B[fp]BL[813.352]
;W[gp]WL[1178.267]
;B[fo]BL[809.983]
;W[fn]WL[1176.226]
(;B[fr]BL[795.568]
;W[gr]WL[1162.041]
;B[lo]BL[751.801]
;W[kp]WL[1158.29]
(;B[ip]BL[721.734]C[Black looks for a place to resign.]
;W[jo]WL[1146.246]
;B[lp]BL[680.761]
;W[kq]WL[1142.967]
;B[lq]BL[665.692]
;W[lr]WL[1140.91]
;B[gn]BL[658.269]
;W[fm]WL[1137.686]
;B[hn]BL[653.343]
;W[io]WL[1135.771]
;B[ho]BL[614.683]
;W[hp]WL[1132.977]
;B[gl]BL[552.479]
;W[dp]WL[1129.752]
(;B[fl]BL[510.736]C[Allowing White to live with a kill.]
;W[eq]WL[1126.392]
(;B[fq]BL[507.687]C[The final blunder, losing the whole lower left corner.]
;W[er]WL[1122.161]
;B[dq]BL[498.89]
;W[fs]WL[1115.623])
(;B[er]
;W[fq]
;B[ar]C[Required, so White keeps sente.]))
(;B[dq]
;W[fl]
;B[gk]
;W[cm]
;B[jm]
;W[kn]
;B[km]
;W[ln]
;B[lm]
;W[mn]
;B[mm]
;W[jf]
;B[je]
;W[hf]C[White's plan to live in the lower left, then reduce Black's central points.]))
(;B[ko]
;W[jp]
;B[hn]
;W[gn]
;B[hl]C[It's better for Black to build his moyo quickly and hope to make enough, but it's hard as White has a lot of cash now.]))
(;B[do]))
(;B[rh]
;W[rg]
;B[qg]
;W[ph]
;B[ni]
;W[of]
;B[oe]
;W[og]
;B[nf]
;W[pe]
;B[qe]
;W[qd]
;B[pe]
;W[nb]
;B[oj]
;W[oa]
;B[oh]
;W[rl]C[Black can get a good compensation this way.... funny game though

]))
(;W[rh]C[White should simply make sure with this, even though Black gets good thickness.]
;B[oi]
;W[ph]
;B[nj]))
(;B[rf]
;W[qe]
;B[qf]
;W[pe]
;B[oe]
;W[qd]
;B[og]
;W[qh]
;B[ri]
;W[pj]C[White lives and reduces nicely. At this point, the game is hard for BLack.]))
(;W[qh]
;B[pc]C[I figured this loss was annoying, so I wanted the corner _first_

]))
(;B[qh]C[This is really big. Not responding to the contact is generally bad unless R11 was sabaki for the life of your own group. As it has a purpose of forcing White to stay unsettled, R12 is sente letting you carry on attacking more things (see variations)]
;W[pj]
(;B[lo])
(;B[ng])
(;B[pc]
;W[ng]
;B[oh])))
(;B[qn]C[The ladder doesn't work, so this feels more severe.]
;W[ol]
;B[pk]
;W[om]
;B[qj]
(;W[rj]
;B[qi]
;W[ri]
;B[qh]
;W[rm]
;B[rn]
;W[rl]
;B[rh]
;W[sk]
;B[ln]C[No idea what's going to happen here, but it looks good for Black.])
(;W[ok]
;B[pj]
;W[lm]C[White's only real option.])))
(;B[ql]
;W[pl]
;B[pk]
;W[ok]
;B[pj]
;W[nl]C[The line I'd expected. Requires a difficult evaluation of who gets more, but it seems a safe bet for Black to get some serious cash on the right. The right seems harder for White to reduce than the bottom seems for Black to reduce.]))
(;W[qh]C[An alternative I had considered but rejected because a) of the squeeze in the var, and b) because that then set you up to attack both O15 and R12]
;B[pm]
;W[on]
;B[om]
;W[no]
;B[qn]
;W[oo]))
(;B[pm]
;W[om]
;B[ol]
;W[nm]
;B[pk]C[With Black's top right position, this is possible, but that lower middle moyo must be dealt with at some point.]))
(;W[ch]C[This may have been bigger...]
(;B[fj]
;W[go]C[Looks complicated but playable for White. White can effectively sacrifice D7 if needs be with the forcing aji on this side, and with slides like B10.])
(;B[dc]C[But I didn't like this.])))
(;B[cp]C[White had hoped for this.]
;W[gq]
;B[dj]
;W[go]C[Now White has a good global position.]))
(;W[pq]C[Much better than P3, living in the corner and using O4 and Q6 as aji stones.]
(;B[op]
;W[oq]C[Now White can attack severely if Black isn't careful.])
(;B[oq]
;W[rp]
;B[op]C[White can take sente here.])))
(;W[mq]C[This felt like it give Black too much guaranteed profit.]
;B[oq]
;W[lp]
;B[qn]))
(;B[oo]C[Black gets tricked...]
;W[qq]
;B[qp]
;W[pq]
;B[on]
;W[pm]))
(;B[qp]TR[op][oq]C[Turns into a taisha very easily. Also, White can play for influence.]
(;W[oq])
(;W[op]
;B[oq]
;W[nq]
(;B[pq]
;W[mp])
(;B[np]
;W[pq]
;B[or]
;W[oo]
;B[pp]
;W[nr]
;B[pr]
;W[mp])))
(;B[op]C[Turns into a standard high 3-4 approach joseki]
;W[qp]
;B[qq]))