Ok, finished my comment.
I'm hoping you can understand my comments and reasoning.
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.50]TM[1800]OT[5x30 byo-yomi]
GN[xhkong-metaperl]PW[xhkong]PB[metaperl]WR[9k]BR[10k]DT[2011-05-31]PC[The KGS Go Server at
http://www.gokgs.com/]C[metaperl [10k\]: gg
]RE[B+Forfeit]
;B[pd]BL[1497.3]
;W[dp]WL[1497.2]
;B[qp]BL[1495]
;W[dc]WL[1492.9]C[I normally close my side, but I think I will approach his 3-4 corner instead.]
;B[ce]BL[1481.7]
;W[jd]WL[1487.9]C[He didnt finish the joseki did he?
Magor:
No, but sometimes you don't want to finish a joseki (because you might end up in gote) and instead play a big point.
Playing K16 here seems odd to me, but i wouldn't call it a clear mistake. It's probably playable.]
;B[cc]BL[1466.2]
;W[dd]WL[1485]
;B[cd]BL[1463.8]
;W[gd]WL[1484.2]LB[de:A][ef:B]C[My group is stable but I feel like strenthening it
Magor:
Good idea, however playing B would be better than playing A. (see variation).]
(;B[de]BL[1424.8]
;W[ee]WL[1481.2]
;B[ef]BL[1415.2]
;W[fe]WL[1472.5]LB[de:1][ee:2][ef:3]C[Hmm, what to play now? I have a loose stone.
Magor:
If you look at the sequence 1-3, the exchange 1-2 is not that good for black.
Compare it with the variation, where black played 3 first. If white would answer this with 2, you wouldn't play at 1.
That you want (and probably should) play another stone here, is the negative consequence of exchanging 1-2.]
;B[dh]BL[1365.7]
;W[cj]WL[1469.1]
;B[oq]BL[1359.1]
;W[jq]WL[1459]LB[nc:C][pj:A][cq:B]C[His double wing might lock up into cash territory soon. I need to jump in there.
Magor:
No, he has 3 stones laid out in around a quarter of the board, he can't make the whole quarter into cash with just one more move.
Furthermore, you don't have any outside strength/influence, which could help you in invading the white side, so invading at the current point is premature. (Only exception might be B - see Variation)
Better moves for are A-C (i prefer A).]
(;B[fq]BL[1302]
;W[hp]WL[1402.2]
;B[cq]BL[1288.9]
;W[dq]WL[1381.7]
;B[cp]BL[1279]
;W[co]WL[1378.7]LB[cr:A]TR[fq]C[Magor:
Thanks to F3, the hane c5 is a mistake. A way for black to profit from this is A (cutting at D5 is also possible, but leads to more complications, A is the best way).
Playing the normal 3-3 joseki out, may be good enough for black in this position, but i include the variations for completeness sake. (And you may find this mistake pretty common around your level)]
(;B[bo]BL[1273.4]
;W[cn]WL[1376.3]
;B[bn]BL[1270.3]
;W[cm]WL[1367.8]
;B[dr]BL[1263.6]
;W[er]WL[1366.2]
;B[cr]BL[1250.2]
;W[eq]WL[1363.8]
;B[db]BL[1230.7]LB[nc:B][pj:A]C[Magor:
While probably sente, it's a small move. It's on the second line, and these are usually endgame-moves. You should have played something bigger like A or B]
(;W[eb]WL[1355.3]C[xhkong [9k\]: thx
xhkong [9k\]: misclick
]
;B[cb]BL[1214.8]
;W[fc]WL[1351.1]C[metaperl [10k\]: np
]
;B[pj]BL[1197]C[Magor:
Finally.. =)]
;W[pf]WL[1314.7]
;B[nd]BL[1185]
;W[oj]WL[1302.9]LB[pi:A]C[Not sure how to handle this contact... I made a mistake and gave him a big wall in my handling of it
Magor:
It's probably best to just extend at A. You are strong in the sorroundings, so there is no need to introduce a weakness with a hane and the resulting cutting point.
It's important to note, that your objective should not be to kill or captur P10 (or even Q14 for that matter) but to solify your territory at the edge. ]
(;B[oi]BL[1167.4]
;W[pi]WL[1300]
;B[pk]BL[1159.8]
;W[qi]WL[1296]LB[oi:A][pj:B]C[Difficult to decide on a move here... maybe use the 3-step process. Are my groups ok? No. Ok fix them... There are two in jeopardy (marked A and B).
Magor:
Good thinking.]
;B[ni]BL[1112.2]
;W[ok]WL[1287.6]
;B[pl]BL[1107]
;W[ol]WL[1284.7]
;B[pm]BL[1101.8]
;W[om]WL[1282.2]
(;B[pn]BL[1077.3]C[Magor:
You can probably already hane here.]
;W[on]WL[1279]
;B[oo]BL[1069.8]
;W[no]WL[1274.1]
;B[np]BL[1031.3]
;W[mo]WL[1235.2]
;B[mp]BL[932.4]
;W[lo]WL[1219]
(;B[re]BL[899.2]TR[ni][oi]C[Magor:
Did you forget, that you have a weak group?
Remember, urgent moves before big ones. Your group is important, as these are two cutting stones, therefore they should be rescued. A move to strengthen or connect these two stones to safety is urgent.]
;W[nf]WL[1181.9]C[Magor:
Now white escapes and at the same time, cut your two stones off.]
;B[og]BL[843.9]C[I strengthen my small group with a threat]
;W[qe]WL[1153.4]
;B[qd]BL[833]
;W[of]WL[1052.2]LB[qe:B][oi:C][pi:A]C[Should I run out to strengthen my group (C) or bend on his group (A)? My attack on that group will be stronger once I triple-atari at B.
Magor:
Bending won't work. (see var.) Atari on B will be ignored (B itself is not important), so the only option you have is jumping out towards the center.]
(;B[qf]BL[700.3]
(;W[pe]WL[1043.2]
(;B[ph]BL[689.5]LB[pg:A]C[I think "A" was a much better move
]
(;W[qg]WL[1023.8]
(;B[rf]BL[677.7]TR[og][ph][ni][oi]C[Magor:
Is R14 an important stone? You actually want to save the marked stones, doesn't you?]
;W[qh]WL[1019.8]TR[og][ph][ni][oi]C[My opponent forfeited.
])
(;B[qh]C[Magor:
Thanks to R13 (should have been at R12) you can now cut here and connect your stones.]
;W[rh]
;B[ri]
;W[qj]
;B[rj]
;W[qk]
;B[ql]))
(;W[rf]
;B[qg]
;W[rd]
;B[rg]
;W[se]
;B[rc]
;W[jk]
;B[bh]
;W[fk]
;B[lc]
;W[jb]
;B[le]
;W[lf]
;B[ke]
;W[kf]
;B[je]
;W[ki]
;B[id]
;W[ic]
;B[hd]
;W[hc]
;B[kd]
;W[jc]
(;B[kb]
;W[ie])
(;B[lp]
;W[kp]
;B[ko]
;W[jo]
;B[kn]
;W[mk])))
(;B[pg]
;W[qg]
;B[rf]
;W[oh]
(;B[ng]
;W[nh]
;B[mh]
;W[ph]
;B[mg]
;W[mi])
(;B[nh]
;W[ph]
;B[ng]
;W[lf]
;B[lc]
;W[jj]
;B[lj]
;W[lk]
;B[mk]
;W[ll]
;B[mj])))
(;W[pg]C[Magor:
White should ignore the atari and connect..]))
(;B[ph]C[Magor:
If you bend]
;W[qh]C[Magor:
White will block.]
;B[qg]C[Magor:
But cutting..]
;W[pg]C[Magor:
Doesn't work.])
(;B[ki]C[Magor:
In the center is room, it's more difficult to be completly cut off. Also you have some friendly stones around D12, so you might be able to connect to them. Or get enough room to create two eyes.
]))
(;B[nf]C[Magor:
With this jump here it will be difficult for white to cut black.])
(;B[ng]C[Magor:
Or with this jump.]))
(;B[on]
;W[nn]
;B[oo]
;W[mk]
;B[nf]))
(;B[pi]
;W[oi]C[Magor:
Let's assume white is pushing along. You are the first one to push, so white is "pushing from behind" which one shouldn't be doing.]
;B[ph]
;W[oh]
;B[pg]
;W[og]
;B[qf]
;W[of]
;B[ok]
;W[nk]
;B[ol]
;W[nl]
;B[om]
;W[mn]C[Magor:
White connects, but your right side is now rock-solid. You have over 30 points on the right side, while white has a nice wall, his wall probably is worth less.]))
(;W[df]WL[1343.2]))
(;B[cr]LB[dr:A]C[Magor:
If white doesn't block at A, black can connect his stones.]
;W[dr]
;B[do]C[Magor:
Now white gets cut.]
(;W[cn]
;B[ep]LB[eo:A]TR[dp][dq][dr]C[Magor:
Black can capture now these three stones (note, that the ladder at A is not working)])
(;W[eo]
;B[dn]
;W[fp]
;B[cn]C[Magor:
Or black can capture something on the other side])))
(;B[pj]TR[pj][qp][oq]C[Magor:
The middle star-point works very well together with the shimari in the lower corner.
This is actually what you really want, if you play a shimari (but rarely get, because white should deny it). Your right side is huge.
])
(;B[cq]TR[cj][jq]C[Magor:
Invading at the 3-3 point is possible.
Maybe it's a bit to high-level for a 10k, but the low double-wing (C10 and K3 are both on the third line, therefore "low") makes blocking on either side for white unattractive.])
(;B[nc]C[Magor:
The third option here might be playing on the upper side. You are enlarging your corner-territory and at the same time, limiting whites potential to get territory at the upper side. (Compare it with the position, if white played O17)]))
(;B[ef]
(;W[de]
;B[df]C[Magor:
Playing D15 now gains nothing for white, while black has with his two stones a nice wall.
Note that the cut at C14 is defened, thanks to the near board-edge.])
(;W[ee]
;B[df]
;W[fe]LB[ee:2][fe:4][df:3][ef:1]C[Magor:
If black directly plays E14, black gets no potential cutting point and gets sente.
(However, in this case white 4 should be ommitted and white should take sente)])))