(;GM[1]FF[4]CA[UTF-8]AP[gGo:1.0]ST[1]
SZ[19]HA[2]KM[0.5]
PW[opponent]WR[16k]PB[Xai]BR[18k]RE[W+30.50]TM[1500]DT[2011-03-25]PC[The KGS Go Server at
http://www.gokgs.com/]
AB[dp][pd]BL[1500]C[: hi]
;W[pq]C[Xai [18k]: hello]
;B[cc]
;W[fq]
;B[dm]LB[iq:1]C[For a reason I can't explain, I wanted to play at 1 but then decided to play what I did
Both moves are fine. ]
;W[cn]
;B[dn]C[For the next sequence of moves, I wanted to try to keep the corner for myself but I ended up making a wall... I was afraid of white crawling along the 3rd line towards C3 but wasn't sure what to do]
;W[co]
;B[do]
;W[qe]
(
;B[cj]
;W[cm]
(
;B[cq]C[Hane at the head of the three stones. It takes away liberties and pressures them strongly. ]
;W[dl]
;B[eq]LB[jc:2][jq:3][qj:1]C[I'm not sure why I played this move. I probably thought I was turning D3 into eye space. I thought about playing 1 ,2, 3 but did not
Yes, one of those moves would have been better. As would R16. Your stones have access to the center. White can't attack you right now. ]
;W[el]
;B[qj]
;W[qm]
;B[qg]
;W[qd]C[See what a difference that makes? Imagine if you'd played there earlier.]
;B[pe]
;W[qf]
;B[pf]
;W[qc]
;B[pc]
;W[pb]
;B[ob]
;W[qb]
;B[nc]
;W[jq]
;B[jo]LB[hq:1]C[Again, I wanted to play 1 but then played K5 thinking that I would try to contain white to the side of the board?
On 9x9 boards, you can contain the opponent to one side of the board. In 19x19, that is extremely rare. ]
;W[kp]
;B[jp]C[This is a terrible move. It lose liberties for your stones and encourages white to connect his making them stronger. ]
;W[iq]
;B[gq]C[I wanted to try to prevent the F3 stone from connecting to his friends
Connecting and keeping the opponent from connecting is not a bad way of thinking. For your level, tha'ts a good goal, but he doesn't gain much by connecting that stone. ]
;W[fp]
;B[fr]
;W[gp]
;B[hp]C[Setting myself up for a double atari. Oops.]
;W[gr]
;B[er]
;W[hq]
;B[ip]C[Again, you don't gain much by saving this stone. This is a lesson in learning the difference between important and unimportant stones. ]
(
;W[kn]C[White shouldn't give you cutting points like that though. ]
;B[jn]C[This type of move is very slow. And now your group is more of a burden than something that helps you. At this point, you might be better off pretending that you never played any of those stones. ]
;W[jm]
;B[ko]
;W[lo]C[With all these cutting points I could not resist just playing a cut atari move... but I could not find a good followup after the atari
Cut one one side threaten something on the other. ]
(
;B[km]
;W[ln]C[The one that you played helped strengthen your opponent's stones. ]
;B[im]
;W[jl]
;B[kl]C[You are helping white capture your other group. You really won't be able to have it both ways. Some of your stones should die here. Both sets are very weak now. ]
;W[il]
;B[hm]
;W[gm]
;B[gn]C[With that move I've lost all those stones..]
;W[hl]
;B[fn]
;W[hn]
;B[in]
;W[ho]
;B[fm]
;W[gl]
;B[go]
;W[io]
;B[em]C[So these stones weren't already connected?]
;W[fl]
;B[ic]
(
;W[di]C[This helps black. It encourages him to strengthen his stone and loses the chance to attack it. ]
;B[ci]
;W[dh]
;B[ch]
;W[dg]
;B[cg]
;W[de]
;B[ce]
;W[ie]
;B[df]
;W[ef]
;B[cf]
;W[ii]C[This move was terrible by white. play away from thickness. ]
;B[ee]
;W[fe]
;B[dd]
;W[ff]
;B[fd]
;W[gd]
;B[fc]
;W[kk]
;B[ll]C[I stubbornly thought I could save these stones...
The question isn't whether you can save them, but is it worth it to save them. Quick answer: It isn't. They don't surround territory nor are they cutting stones. If white captures them, he gets four points of territory. Most moves you can make at this point are worth more than two points per move.
Truthfully, it's a mistake for white to try to capture them. Black should shrug his shoulders and ignonore white's move. ]
;W[mk]
;B[ml]
;W[nl]
;B[lk]
;W[lj]
;B[nk]
;W[mj]
;B[nm]
;W[ol]
;B[mm]C[: - _ -]
;W[om]
;B[nn]
;W[oo]
;B[cl]C[This doesn't quite work, but you could play B9 to threaten this while securing territory.]
;W[no]C[Oh neat. White gave you a chance to save that cutting stone.]
;B[ck]
;W[ni]
;B[oj]
;W[oi]
;B[pi]
;W[pj]
;B[pk]
;W[ok]
;B[pj]
;W[og]
;B[pg]
;W[nf]
;B[pl]C[This does nothing for you. After white replies, there is still an open skirt and one less ko threat. ]
;W[pm]
;B[kd]
;W[ke]
;B[le]
;W[kf]
;B[ld]
;W[lf]
;B[me]
;W[mf]
;B[oh]
;W[nh]
;B[ph]
;W[ne]
;B[nd]
;W[gc]
;B[gb]
(
;W[hc]
;B[hb]
;W[jd]
;B[id]
(
;W[he]
;B[jc]
;W[je]
;B[fb]
;W[kc]
;B[lc]
;W[kb]
;B[jb]
;W[lb]
;B[mb]
;W[mc]
;B[md]
;W[ja]
;B[ib]
;W[ma]
;B[na]
;W[oa]
;B[pa]
;W[qa]
;B[oa]
;W[od]
;B[oe]
;W[of]C[This white move is worth exactly one point. And it is absolutely not sente. ]
;B[oc]
;W[rg]
;B[rh]
;W[sf]
;B[sh]
;W[sg]C[Is there anything I could do to invade the white upper corner?
No. It's too big. ]
;B[ri]C[But this is a wasted move. ]
;W[re]
;B[qq]C[Trying to invade just to gain experience]
;W[qp]
;B[rp]
;W[ro]
;B[qo]
;W[pp]
;B[rn]
;W[rq]
;B[so]
;W[sp]
;B[sq]
;W[rr]
;B[qn]LB[rm:A]C[I believe I should have played at A instead..
Yes.]
;W[rm]
;B[sm]
;W[sl]
;B[rl]
;W[sn]
;B[on]
;W[pn]
;B[po]
(
;W[mn]
;B[sm]
;W[lm]
;B[sk]
;W[sr]
;B[sp]
;W[qr]
;B[ql]
;W[nj]
;B[fs]
;W[gs]
;B[ep]
;W[fo]
;B[dj]
;W[ej]
;B[ei]C[I thought I could try to find a way to hurt all those unconnected white stones..but could not]
;W[eh]
;B[fi]
;W[fh]
;B[gi]
;W[dk]
;B[cp]
;W[tt]
;B[tt]TB[aa][ab][ac][ad][ae][af][ag][ah][ai][aj][ak][al][am][an][ao][ap][aq][ar][as][ba][bb][bc][bd][be][bf][bg][bh][bi][bj][bk][bl][bm][bn][bo][bp][bq][br][bs][ca][cb][cd][cm][cn][co][cr][cs][da][db][dc][de][dq][dr][ds][ea][eb][ec][ed][es][fa][ga][ha][ia][ja][ka][kb][kc][la][lb][ma][mc][nb][od][qh][qi][qk][rj][rk][ro][si][sj][sl][sn]TW[eg][ei][ek][fg][fi][fj][fk][ge][gf][gg][gh][gi][gj][gk][gq][hf][hg][hh][hi][hj][hk][hm][hp][hr][hs][if][ig][ih][ij][ik][im][in][ip][ir][is][jf][jg][jh][ji][jj][jk][jn][jo][jp][jr][js][kg][kh][ki][kj][kl][km][ko][kq][kr][ks][lg][lh][li][lk][ll][lp][lq][lr][ls][mg][mh][mi][ml][mm][mo][mp][mq][mr][ms][ng][nk][nm][nn][np][nq][nr][ns][on][op][oq][or][os][pr][ps][qq][qs][ra][rb][rc][rd][rf][rs][sa][sb][sc][sd][se][ss]C[Xai [19k]: thanks]
)
(
;W[ro]
)
)
(
;W[jc]C[Letting white break into your territory like this is a mistake. ]
)
)
(
;W[hb]
;B[hc]C[This cut wouldn't work, so white could have played at H18.]
)
)
(
;W[cg]C[Something like this attacks the black stone by forcing towards white thickness. ]
)
(
;W[dg]
)
)
(
;B[ln]
;W[km]
;B[lp]
;W[mo]
;B[kq]
)
(
;B[lp]
;W[kq]
;B[ln]
;W[mo]
;B[km]
)
)
(
;W[ln]C[If white plays more like htis, he's building his moyo while threatening your few stones, but you can ignore his move. ]
)
)
(
;B[cl]C[I'd say hane at the head of three stones. ]
)
(
;B[cp]C[Or here. ]
;W[cl]
;B[dl]
;W[ck]
;B[dk]
;W[bj]
;B[ci]C[White living here only gives you tremendous thickness.]
)
)
(
;B[qd]C[White's move encourages you to strengthen your stone and responding like this weakens his and it starts to make fourth line territory. Truthfully, white shouldn't have even played it. ]
)
(
;B[cm]C[But if you want to respond locally, this puts a lot of pressure on those white stones and increases your influence. ]
)
(
;B[cp]
)
)
was very bad, but it needs to be responded to. At my level, for instance, I would say that whoever gets to play R16 in that situation is instantly ahead in the game. Notice how huge your corner gets if you play R16 and how weak white's one stone is, vs how weak your stone is and how much more territory white has if he plays R16 next.
: Yeah, we all accidentally play moves like this when we're learning 
. 
: This is a single stone, and it is not cutting any of white's groups. It is not worth saving at this time - you have bigger moves on the board.
: The shape before this move is called the bamboo joint, and if you evaluate it you can see it is already connected - if white tries to push through, you just block. So, making this connection here is completely unnecessary.