Things to think about
1. Try to keep your stones as connected as possible while disconnecting his.
2. Don't attack by attaching. This tends to strengthen opponent stones.
3. Learn to differentiate useful stones and those that aren't.
Useful stones:
1. Make territory.
2. Give influence.
3. Keep him from taking a giant territory in the form of an invasion or reduction.
4. Are cutting stones.
Non-useful stones:
1. Are those that are plastered to enemy walls.
2. That will never make any territory and that your opponent doesn't gain that much by capturing them.
I hope this is helpful.
(;GM[1]FF[4]CA[UTF-8]AP[gGo:1.0]ST[1]
SZ[19]HA[4]KM[0.5]
PW[joaom]WR[16k]PB[Linokai]BR[20k]RE[W+38.50]TM[1500]DT[2011-04-15]PC[The KGS Go Server at http://www.gokgs.com/]
AB[dd][dp][pd][pp]BL[1500]C[joaom [16k]: hello
Linokai [20k?]: hey
joaom [16k]: gg
]
;W[pj]
;B[jd]BL[1487]
;W[md]
;B[jj]
;W[qf]
(
;B[mg]C[The first lesson of go is to seperate your opponent's stones and to keep yours connected to eachother. When you add in things like sacrificing strategies and things like this, this isn't universal, but it's the first lesson that you learn. A move that separates your opponents stones makes both of them a bit weaker and makes your stones stronger. ]
;W[pn]
;B[pl]C[This move does attempt to separate his moves. I think it is possible, but it is good to note that the stone you just played is outnumbered in this area 2-1 and white gets to move first. You might be ok, but that's just good to note. ]
;W[nl]C[Can you see the two obvious weakpoints that white left here? ]
(
;B[on]
;W[ql]
;B[pm]
;W[om]
;B[po]C[Hmmm. I think that he wants to expand downward here. ]
;W[qn]
;B[qm]
;W[qo]
;B[rm]
;W[pk]
;B[oo]
;W[mp]
;B[ko]
;W[qj]
;B[rl]
;W[qk]
;B[rp]
;W[ph]
;B[og]
;W[pg]
;B[rf]
(
;W[rg]
;B[re]
;W[qe]
(
;B[rk]
(
;W[rj]
(
;B[sj]C[A move like this is purely endgame. ]
;W[si]
;B[sk]
;W[of]C[After learning about keeping your stones connected and disconnecting your opponent's stones, you should ask yourself how important your stones are. A weak stone plastered against a white wall is not a stone worth investing in. It is unlikely to ever surround territory. If white spends moves capturing it, he might get a point or two, but then you got to play somewhere else.. P13 is just such a stone. It will be unlikely to ever surround any territory and if white captures it, he only gets a couple of points. If you invest in it now, it will be a burden. It will hurt your chances. If you want to help N13 to diminish the influence of his wall (Which would be a reasonable plan) consider a move like K13.]
(
;B[oh]
;W[oi]
;B[ni]
;W[nj]
;B[mk]
;W[nh]
;B[mi]
;W[ng]C[Well, the situation is basically as it was before. If white took that single stone while you played elsewhere, you'd be in a great shape, but it's not too late. Get a good point. Perhaps R16? ]
;B[nd]
;W[qd]C[Drat. That was a huge point, but now you get two moves on his single stone. ]
;B[qc]
;W[rc]
;B[qa]C[Ok. Back to the keeping your stones connected lesson. ]
;W[pe]
;B[mc]C[Yes good! That was your best move in awhile. ]
;W[od]
;B[pc]
;W[ne]
;B[nc]
;W[oc]
;B[ob]
;W[oe]
;B[rb]
;W[rd]C[Your formation still has a major weakness, but this was a good result for this area considering how thin you were. ]
(
;B[sc]C[Very rarely do you play a move on the first this early in the game. ]
(
;W[sd]
;B[sb]
;W[kd]
;B[ke]
;W[le]
;B[kc]
;W[ld]
;B[lf]
;W[mf]
(
;B[kg]C[LOTS of cutting points!!! ]
(
;W[mh]
;B[lg]
;W[mj]
;B[li]
;W[lh]
;B[kh]
;W[dj]
(
;B[ej]C[Another lesson is that attaching to weak stones tends to strengthen them. Or it allows for your opponent to play sacrificing/shape-making techniques. (sabaki)
You are strong here. You must attack from a distance. ]
(
;W[gh]
(
;B[gg]
;W[gd]
(
;B[if]
;W[jf]
;B[je]
;W[ii]
;B[hi]
;W[hh]
;B[ih]
;W[ij]
;B[il]
;W[ig]
;B[jh]
;W[ie]
;B[hf]
;W[id]
;B[kf]
;W[hj]
;B[gi]
;W[fi]
;B[gj]
;W[gk]
;B[fj]
;W[hk]
;B[fh]C[Heh. That worked out alright for you. ]
;W[ei]
;B[el]
;W[dl]
;B[di]
;W[eh]
;B[fg]
;W[ci]
;B[dh]
;W[eg]
;B[cj]
;W[dk]
;B[dg]
;W[ef]
;B[ee]C[This is sometimes a skillful-tesuji. Otherwise this is squeezing out the toothpaste. It means that you squeeze white throught a tight space and leave a lot of shape defects for black. It's exactly why you don't play out a ladder that doesn't work. ]
;W[df]
;B[cf]
;W[cg]
;B[ff]
;W[ch]
;B[hg]
;W[de]
;B[ce]
;W[fe]
;B[ed]
;W[fd]
;B[fc]
;W[gc]
;B[gb]
;W[ec]
;B[fb]
;W[hb]
;B[db]C[Your opponent showed you what's wrong with this, but just try to ask yourself what will happen if your opponent plays here or there while you play. You'll get better at reading deeper and deeper as you get stronger.]
;W[dc]
;B[cc]
;W[cd]
;B[bd]
;W[dd]
;B[bb]
;W[lc]
;B[lb]
;W[me]
(
;B[jb]
;W[ib]
;B[ha]
(
;W[ia]
;B[ga]
;W[eb]
;B[ea]
;W[fa]
;B[da]
;W[bf]
;B[be]
;W[bg]
;B[af]
;W[ag]
;B[ae]
;W[ek]
;B[fk]
;W[gl]
;B[gm]
;W[fl]
;B[em]
;W[ki]
;B[lj]
;W[kj]
;B[lk]
;W[kk]
;B[kl]
;W[ji]
(
;B[jk]C[That stone is a gote eye for white. It isn't important just yet. ]
;W[im]C[Phew! He encourages you to connect yourself and remove one of his liberties. ]
;B[hl]
;W[fm]
;B[fn]
;W[dn]
;B[dm]
;W[cm]
;B[ik]
;W[nk]
;B[qp]
;W[nn]
(
;B[mo]
;W[no]
;B[np]C[white shows you the problem with this shape. ]
;W[nq]
;B[op]
;W[oq]
;B[pq]
;W[lq]
;B[jq]
;W[lo]
;B[mn]
;W[nm]
;B[ln]
;W[kq]
;B[jp]
;W[jr]
;B[ir]
;W[kr]
;B[or]
;W[nr]
(
;B[os]
;W[ns]
;B[pr]
;W[is]
;B[hs]
;W[js]
;B[hq]
;W[ls]
(
;B[kp]C[This move is absolutely unnecessary. ]
;W[eo]
;B[lp]
;W[mq]
;B[do]
;W[cn]
;B[en]
;W[ep]
;B[eq]
;W[dq]
;B[cq]
;W[dr]
;B[cp]
;W[cr]
(
;B[br]
;W[fq]
;B[er]
;W[fr]
;B[es]
;W[fs]
;B[cs]
;W[ds]
;B[bs]
;W[bo]
;B[bp]
;W[ap]
;B[aq]
(
;W[as]
(
;B[gp]
;W[gr]
;B[fp]
;W[co]
(
;B[hr]
;W[fo]
;B[go]
;W[bq]
;B[gn]
;W[mm]
;B[lm]
;W[ml]
;B[ll]
;W[ge]
;B[he]
;W[hd]
;B[ic]
;W[hc]
;B[jc]
;W[ja]
;B[ka]
;W[nb]
;B[mb]
;W[pb]
;B[oa]
;W[qb]
;B[pa]
;W[ra]
;B[na]
;W[sa]C[Unnecessary by white, but anyhow, I hope my review helped. ]
;B[ol]
;W[ok]
;B[rn]
;W[tt]
;B[tt]TB[aa][ab][ac][ad][ba][bc][ca][cb][fl][fm][gh][gk][gl][hh][hj][hk][hm][hn][ho][hp][ig][ii][ij][im][in][io][ip][iq][jf][jg][ji][jl][jm][jn][jo][kb][ki][kj][kk][km][kn][la][lo][ma][nb][pn][ps][qn][qo][qq][qr][qs][ro][rq][rr][rs][sl][sm][sn][so][sp][sq][sr][ss]TW[ah][ai][aj][ak][al][am][an][ao][aq][ar][bh][bi][bj][bk][bl][bm][bn][bp][br][bs][cj][ck][cl][cp][cq][cs][dg][dh][di][do][dp][ed][ee][eq][er][es][fb][fc][ga][gb][ha][ks][lr][mr][ms][nf][og][oh][oj][pc][pd][pf][pi][qc][qg][qh][qi][rb][re][rf][rh][ri][sb][sc][se][sf][sg][sh]C[joaom [16k]: you didn(t click on Q6
joaom [16k]: the count wasn't right
Linokai [20k]: oops]
)
(
;B[ao]C[Still. ]
)
)
(
;B[ao]C[Doh! white gave you a chance to live. You can't win the capture race. ]
)
)
(
;W[ao]C[This would have killed black. Notice that B3 is a false eye. If white plays C5, black's in atari. ]
)
)
(
;B[fq]C[After you capture the cutting stones here, white has to prove that he can live in the corner. ]
;W[bq]
;B[bp]
(
;W[ar]
;B[bs]
;W[cs]
;B[ap]
;W[er]
(
;B[es]
)
(
;B[fr]
;W[es]
;B[br]
;W[as]
;B[br]
;W[bs]
;B[aq]C[Not that I would expect you to find this yet, but forcing white to live is good no matter the level. ]
)
)
(
;W[br]
;B[aq]
;W[ar]
(
;B[ap]
;W[er]
;B[fr]
;W[es]C[It looks like white can live this way, but it's in gote. ]
)
(
;B[er]
;W[ap]
;B[ao]
;W[bo]C[Black loses this way, so it gives white the aji necessary to live. ]
;B[aq]
;W[co]
;B[ap]
)
)
)
)
(
;B[bo]
;W[cn]
;B[eo]C[Make some quick points. ]
)
)
(
;B[pr]C[This is better. It doesn't give white a sente follow-up. It alleviates your weakness. Then white has to solve a life and death problem. ]
)
)
(
;B[no]C[I like this better. ]
)
)
(
;B[lm]C[That's a gote eye for white. That is all. It is not an important stone. ]
)
)
(
;W[nb]
;B[mb]
;W[pb]
;B[na]
;W[qb]
)
)
(
;B[mb]
)
)
(
;B[fg]
)
)
(
;B[ei]C[Separate his stones. Now both of his stones are very weak. Can they live? If they do, you'll be strengthened. I don't think they can both live. ]
)
)
(
;W[ei]C[This is huge for white.]
)
)
(
;B[dl]C[This builds up your potential while pressuring the white stone. ]
;W[df]
(
;B[fd]C[This sort of sequences is much more normal. ]
)
(
;B[dh]
)
)
)
(
;W[je]
;B[kf]
;W[jc]
;B[id]
;W[lc]
;B[kb]
;W[lb]C[White gets to separate your groups. ]
;B[nb]
;W[ib]
;B[ic]
;W[jb]
;B[hb]
)
)
(
;B[je]C[Perhaps something like this? ]
)
)
(
;W[cj]C[This would have been much bigger. ]
)
(
;W[nb]
;B[pb]
;W[lc]
;B[mb]
;W[lb]
;B[na]
;W[ld]C[This was possible for white. ]
)
)
(
;B[ld]C[This is much better locally.]
;W[nb]
;B[pb]
;W[mb]
;B[lc]
)
)
(
;B[jg]C[This move helps the N13 stone a bit. Of white can still have it, but it also helps your K16 and K10 stone. Of course, R16 is still there. You may want to consider that point still. It's still pretty big if white gets to take that whole area. ]
)
)
(
;B[dj]C[Can you see how this move is bigger? ]
)
)
(
;W[qd]C[Now how do you feel about your stones? Do you think they can live? Even if they could, how much weaker do they all feel? How much stronger does N16 of white's feel? ]
)
)
(
;B[qd]C[Keep your stones connected! ]
)
)
(
;W[qe]C[This might be a reasonable way to play as black if he decides to sacrifice that stone to close the corner, but anyway, the lesson of the day is that white can disconnect your stone. ]
)
)
(
;B[om]C[Consider separating his stones like this. I can't say that it is certainly the better move, but I feel like you are still at the stage where you would do well to understand the importance of keeping your stones connected and disconnecting his. ]
)
)
(
;B[oe]C[This move splits the groups. Other moves could be considered as well, but both of your stones can't be cut. Whereas his have to live separately. ]
)
)