(;GM[1]FF[4]AP[glGo:1.3.1]ST[1]

SZ[19]HA[2]KM[0.5]
PW[GNU Go]PB[Black]RE[B+22.5]DT[2006-01-12]
AB[pd][dp]C[I'm going to be commenting this game, pointing out good and bad moves as I see them and explaining why a particular move was made.  Of course the analysis will only be as good as my ability, which is to say not very good.

My opponent was GnuGo on my computer.]
;W[dd]
;B[qp]
;W[op]
;B[oq]
;W[nq]
;B[pq]
;W[mp]
;B[pn]SQ[qn]C[8 is the first abnormal move.  Apparently the play at the square is more natural here.  I think the reason is that there's less room for white to mess around Black's stones at some later point.]
;W[fq]
;B[dn]
;W[qf]
(;B[qh]C[The pincer at 12 is designed to build a framework along with the lower right hand corner.  As far as I can tell, this is a good choice.  The variation shows an alternate joseki.]
;W[qc]
;B[qd]
;W[pc]
;B[od]
;W[rd]
;B[re]
;W[rc]
;B[qe]
;W[nc]
;B[me]C[This is a typical pincer joseki resulting from 12, and what I was hoping for when I played it.]
;W[pg]SQ[pf]C[The computer likes this move.  I think it's bad, because black is in a position to severely attack 11 and 23.  What can be said for the move is that if this group lives, it will leave Black with at least one, if not two vulnerable groups in the area.  The squared point would be an alternate placement for 22 which would avoid this possibility.  It is also joseki.]
;B[oh]
;W[rf]
;B[se]
;W[ph]
;B[pi]
;W[rh]
;B[ri]
;W[ld]
;B[mf]C[At this point, white's group is dead, though they still exert some influence--White will leave them, hoping that I'll have to play cautiously to ensure that they can't be rescued by stones in the surrounding area.]
;W[dr]
;B[cq]
;W[iq]
;B[cf]SQ[fc]CR[cg]MA[dg]C[I'm not sure if 36 is a good move or not.  Certainly if I'm going to approach white's stone, 36 comes from the proper side.  A slightly more distant approach at the circled point or the X might be safer.]
;W[cl]
;B[cr]C[37 very loosely pincers my stone in preparation for an attack on it.  If I let White have 38 as well, my group might end up short of eye space, and would have to run into the center.]
;W[df]C[39 starts an attack on my kakari stone, and I probably respond poorly here.  After consulting a book, I feel like the joseki I show in the variation might be better than what I do here.]
(;B[bd]
;W[ce]
;B[be]
;W[bf]
;B[cc]
;W[cg]C[Note that with the capture of 36, white has laid claim to a large area, and now has a reasonable degree of center influence to counter my group in the upper right.  In contrast, my potential corner territory is small and influences nothing.]
;B[dc]
;W[nm]
;B[pl]
;W[hc]C[A good choice with 49 which establishes quite a bit of territory.]
;B[gp]SQ[gq]CR[el]TR[fp]C[I'm expecting white to try and connect at the squared point, and I'll play the triangle in order to build a little bit of influence towards the center.  This move might be a bit of a mistake, because white can then jump to the circled point or somewhere nearby, reducing that influence while building territory.]
;W[fr]
;B[fp]
;W[fd]C[It]
;B[ml]CR[fb]C[The 53-54 exchange is probably bad for me.  Playing at the circled point gives me a bit more territory and unquestionable safety for my corner stones.  I really don't know what to think of 54 in and of itself.]
;W[el]
;B[hq]
;W[ip]
;B[hr]C[55 was the move which I thought rendered 50 a bit suspect, but I didn't expect white to descend with 51, and I'm pleasantly surprised by the opportunity to cut off 3 of white's stones.]
;W[ig]
;B[lh]CR[lj][nl]C[After 49, 53 and 55, I can do little about this move.  It looks as if white is going to get a large area in the left and center which I won't be able to match.  60 is clearly much less effective, both because it claims less territory and because there might be future weaknesses at the circled points.]
;W[ii]
;B[md]C[Ouch.  I'm not sure I could've prevented 61 had I moved elsewhere, but compared to my position, white looks beautiful at this point.  

62 feels like a horrible move to me.  It presents no real threat to white, other than nibbling away four or five points in the endgame.]
;W[mc]C[But it's not half-bad if White responds to it.  It makes the upper right hand Black group slightly better connected while 63 only prevents me from making moves that wouldn't have worked anyway. 

I'm still scratching my head about this one.]
;B[ir]
;W[bn]
;B[dm]
;W[dl]
;B[gm]
;W[gl]
;B[hm]
;W[ik]C[64 is probably slow, but it aims to sneak under the white stones in preparation for an attack on them.  65 robs me of a bit of territory and makes the group less secure, but 66 through 70 give me room for eyes while also making the coming attack somewhat more severe.  71 makes a few points, but I think White would be better off protecting the group at the bottom.]
;B[jq]
;W[jp]
;B[kq]
;W[nr]C[So far, I've only taken a little territory in sente, but that's not a bad result.]
;B[hl]
;W[fk]
;B[gk]
;W[gj]
;B[fl]CR[fm]TR[fn]C[76-80 aren't so good, because they can be largely undone by the atari at F7.  I'd respond below, giving up the stone at 80 to keep my group out of trouble.]
;W[kf]C[81 is a big point, and white's position continues to improve.]
;B[fj]
;W[ek]
;B[hj]
;W[gi]
;B[hk]C[82 is a sacrifice stone of course and the effect is that if I time it correctly, my attack could be much more severe.]
;W[hi]
;B[mm]
;W[jm]MA[ip][jp][iq]C[88 is necessary to have a chance at attacking the crossed group, while 89 ought to keep them safe.  Still, I've gained substantially by capturing 47.]
;B[mn]
;W[jl]
;B[no]
;W[np]
;B[mo]
;W[lp]
;B[kk]
;W[kp]MA[lp][mp][np][nq][nr][op]C[96 is a key point which gets me some territory on the right, while also attacking.  I think White would've been better off playing at J10 to ensure a connection but that would've increased the risk of losing the crossed stones.]
;B[ij]
;W[eb]
;B[db]
;W[ec]
(;B[jk]
;W[bb]C[Children, this is why we study life and death problems.  102 makes it likely that I can kill white's large group, but if you check the alternate variation, I might have been able to do that anyway.]
;B[ac]
;W[cd]
;B[ab]C[I just put more stones on the board to be killed.]
;W[il]
;B[in]C[I think 108 is the best point to ensure that White can't get an eye in the area.]
;W[bp]
;B[bq]
;W[da]
;B[ca]
;W[bc]
;B[ea]
;W[ba]C[What was I saying about adding more stones to a dead group?]
;B[lr]C[116 ensures that there is at most one eye at the bottom of the board.]
;W[em]
;B[en]
;W[fm]
;B[fn]
;W[ji]
;B[jn]
;W[li]
;B[mi]
;W[lj]
;B[mk]C[White is able to push into my territory causing a moderate loss, but that means giving up on his large group for good, since in the process, I'm able to solidify my position surrounding it.]
;W[mj]
;B[nj]
;W[kh]
;B[nh]
;W[lg]
;B[mh]
;W[co]
;B[do]
;W[lk]
;B[ll]
;W[jj]
;B[kl]
;W[mg]
;B[ng]
;W[lf]
;B[of]
;W[le]
;B[oo]
;W[kj]
;B[km]
;W[cp]
;B[dq]
;W[nd]
;B[ne]
;W[oc]
;B[or]C[At least one of 144, 146 and 148 was an unnecessary move, as was 152.]
;W[cn]
;B[cm]
;W[bm]
;B[ap]
;W[ao]
;B[aq]
;W[sd]
;B[ok]
;W[gl]C[160 was useless, and would've been better spent rescuing the stone in atari.  At this point, I have no good ko threats, so I pass.]
;B[tt]
;W[fl]
;B[tt]
;W[tt]TB[ar][as][br][bs][cs][dr][ds][eo][ep][eq][er][es][fo][fq][fr][fs][gn][go][gq][gr][gs][hn][ho][hp][hs][ik][il][im][io][ip][iq][is][jl][jm][jo][jp][jr][js][kn][ko][kp][kr][ks][lm][ln][lo][lp][lq][ls][mp][mq][mr][ms][nf][ni][nk][nl][nm][nn][np][nq][nr][ns][oe][og][oi][oj][ol][om][on][op][os][pe][pf][pg][ph][pj][pk][pm][po][pp][pr][ps][qf][qg][qi][qj][qk][ql][qm][qn][qo][qq][qr][qs][rf][rg][rh][rj][rk][rl][rm][rn][ro][rp][rq][rr][rs][sf][sg][sh][si][sj][sk][sl][sm][sn][so][sp][sq][sr][ss]TW[aa][ab][ac][ad][ae][af][ag][ah][ai][aj][ak][al][am][an][bd][be][bg][bh][bi][bj][bk][bl][bo][ca][cb][cc][cf][ch][ci][cj][ck][da][db][dc][de][dg][dh][di][dj][dk][ea][ed][ee][ef][eg][eh][ei][ej][fa][fb][fc][fe][ff][fg][fh][fi][fj][ga][gb][gc][gd][ge][gf][gg][gh][ha][hb][hd][he][hf][hg][hh][ia][ib][ic][id][ie][if][ih][ja][jb][jc][jd][je][jf][jg][jh][ka][kb][kc][kd][ke][kg][ki][la][lb][lc][ma][mb][na][nb][oa][ob][pa][pb][qa][qb][ra][rb][sa][sb][sc]C[Black wins by 22.5 points.

I think given this margin, I would've lost if I'd kept the corner group and failed to make the big capture.  It might've been possible to achieve both goals, however.])
(;B[bb]
;W[jk]AE[kj]
;B[jj]C[Something went really weird here and I couldn't get this to work.  But White cuts at L10, black extends to M9 (if black ataris at M10, white can atari at M9, then again at L8 after black captures, and then White M7 may well create an eye for White.  I'm unsure if this works or not for white, but extending to M9 is safer for Black, even if it loses 2 points of territory.]
;B[kj]
;W[lk]
;B[lj]
;B[mj]))
(;B[dg]
;W[ce]
;B[ef]
;W[de]
;B[eg]
;W[cg]
;B[ch]
;W[bf]
;B[bg]
;W[fd]SQ[dj]CR[dk]TR[go][ho][hn][gn]MA[fi][fj][gj][gi]C[This actually looks a bit funny to me, but I think it's better than what happens in the real game.  From this position, an extension to the squared or circled points solidifies my group while attacking 37.  In all likelihood, 37 wouldn't die, but if he builds a base underneath my stones, I can connect above, and if he runs out into the center, I can chase him, building territory and influence somewhere around the points I've marked with crosses.  Because I have D4 and D6, the group created by 37 is unlikely to make much territory in the triangled region.]))
(;B[nd]
;W[rd]
;B[qc]
;W[qi]SQ[ql]TR[qm]C[Unlike in the other line, Black's stones in the upper and lower right aren't working together at all.  Moreover, depending on the circumstances, a later play by white at the squared or triangled points would attack that black group while adding significant territory.]))