(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[6.50]TM[600]OT[5x20 byo-yomi]
PW[Piotr]PB[paK0]WR[16k]BR[16k]DT[2013-11-16]PC[The KGS Go Server at http://www.gokgs.com/]C[Piotr [16k\]: hi gg
paK0 [16k\]: yo, gl
]RE[W+6.50]
;B[pd]BL[598.826]
;W[dd]WL[598.984]
;B[pp]BL[595.109]
;W[dp]WL[598.116]
;B[cj]BL[590.373]
;W[dh]WL[594.898]
;B[cm]BL[588.032]
;W[co]WL[592.758]
(;B[ch]BL[586.052]C[I don't think this is a good way to strengthen your group. This touches a relatively weak stone considering it is not really connected to the white stone on top and your black group already has a base.]
;W[cg]WL[591.274]
;B[bh]BL[584.407]
;W[bg]WL[589.385]
;B[pj]BL[579.559]C[Good job recongnizing you had sente. Your group on the left is fine for now.]
;W[md]WL[586.1]C[This approach is unusual, but it should still be responded to.]
(;B[jp]BL[573.362]C[This move is big, sure, but I think responding to the approach is urgent. Urgent before big.]
;W[hp]WL[581.166]
;B[ir]BL[564.592]C[This move is slow. Your side is not undercut because white also played on the fourth line.]
;W[hr]WL[579.329]
;B[iq]BL[560.764]
;W[hq]WL[577.482]
;B[kd]BL[550.391]C[This pincer is okay, but it would have been nicer if your corner was safer.

Even so, up to this point black is doing well. I think black should win from here.]
;W[jd]WL[574.422]C[This attachment is wrong. It touches a weak stone for no reason.]
(;B[je]BL[542.586]C[The hane is correct.]
;W[id]WL[571.279]
;B[ke]BL[540.865]C[Very good!]
;W[ie]WL[568.833]
;B[jf]BL[538.147]
;W[jh]WL[565.604]
;B[me]BL[533.616]
;W[lc]WL[562.685]
(;B[nd]BL[527.606]C[I like the idea of keeping the right, however...]
;W[kc]WL[560.982]C[Now that white's groups on top are connected he has no worries at all. Black has lost much of the lead.]
;B[mc]BL[523.45]
;W[ld]WL[559.414]
;B[le]BL[522.348]
;W[nc]WL[557.254]
(;B[mb]BL[516.868]C[Usually it is good to extend here, but, as you saw, you cannot save these stones. It is better to just sacrifice the 1 directly.]
(;W[nb]WL[549.934]
;B[na]BL[507.435]
;W[oa]WL[544.085]
;B[lb]BL[483.164]
;W[kb]WL[538.49]
;B[ob]BL[466.472]
(;W[ma]WL[534.324]
;B[oc]BL[464.612]
;W[la]WL[531.855]
;B[od]BL[460.327]
;W[pb]WL[524.8]
;B[qc]BL[455.7]
;W[qb]WL[523.138]
;B[rc]BL[453.087]
;W[rb]WL[520.135]
(;B[mi]BL[425.877]
;W[lh]WL[514.878]
;B[mh]BL[423.357]
;W[mg]WL[513.919]
;B[lg]BL[420.467]
;W[kg]WL[509.759]
;B[lf]BL[417.579]
;W[ng]WL[490.862]
(;B[ne]BL[412.237]C[This cut is not yet a problem]
;W[of]WL[486.579]
;B[ph]BL[401.574]
;W[qe]WL[477.105]
;B[pf]BL[396.008]
;W[pe]WL[474.014]
;B[oe]BL[392.798]
;W[pg]WL[465.743]
;B[qf]BL[388.137]
;W[qg]WL[455.179]
;B[rf]BL[376.286]
;W[re]WL[447.045]
;B[rg]BL[365.841]
;W[qh]WL[438.69]
;B[se]BL[344.83]
;W[sd]WL[434.618]
;B[rd]BL[327.517]
;W[sf]WL[422.737]
;B[qd]BL[324.533]C[Good job reading this]
;W[rh]WL[384.886]
;B[se]BL[321.999]
;W[oh]WL[375.994]
;B[pi]BL[320.32]
;W[re]WL[374.535]
;B[oi]BL[304.058]
;W[qi]WL[342.252]
(;B[qk]BL[293.998]
;W[rj]WL[323.35]
;B[rk]BL[291.483]
;W[sk]WL[317.865]
;B[sl]BL[282.489]
;W[rl]WL[288.232]
;B[sj]BL[275.696]
;W[si]WL[284.902]
;B[sk]BL[274.243]
;W[sc]WL[269.779]
;B[sg]BL[265.534]
;W[pk]WL[240.933]
;B[qj]BL[262.649]
;W[kl]WL[221.223]TR[mj][mk][ll][lm][kn][ko]C[This was a good reduction move by white. It is on the edge of black's influence. This technique is called using "sector lines" - a fancy way of saying that you should play a move on the edge - but not inside of - your opponet's moyo when you want to reduce.]
;B[ig]BL[249.406]C[This is a small relative to protecting your points]
;W[hg]WL[213.882]
;B[ih]BL[243.778]
;W[hh]WL[211.797]
;B[ii]BL[242.102]
;W[ik]WL[203.711]
(;B[ji]BL[235.284]C[These points are nice, but there seems to be bigger moves on the board]
;W[ki]WL[201.658]
;B[li]BL[232.237]
;W[kj]WL[189.353]
;B[kh]BL[230.351]
;W[if]WL[176.16]
;B[jg]BL[228.839]C[You have captured the stones, but white has a larger upper left corner that is fairly solid]
;W[hi]WL[160.027]
(;B[on]BL[200.547]C[This move does a bit to secure your territory, but there are better moves]
;W[sb]WL[158.828]C[Small, you group is fine]
;B[ok]BL[181.656]
;W[pl]WL[143.545]
;B[ol]BL[179.163]
;W[pm]WL[136.35]
;B[om]BL[163.926]
;W[pn]WL[134.113]
(;B[ql]BL[159.769]
;W[qm]WL[132.332]
;B[qp]BL[132.526]
;W[rn]WL[126.093]
;B[rm]BL[129.742]
;W[po]WL[120.604]
;B[oo]BL[126.782]
;W[qo]WL[119.236]
;B[rp]BL[118.625]
;W[so]WL[107.786]
;B[sp]BL[115.582]
;W[op]WL[92.306]
(;B[ro]BL[112.231]C[Uneeded, that cutting stone has potential]
;W[kq]WL[75.959]
;B[kp]BL[97.416]
;W[mp]WL[70.772]
;B[np]BL[92.25]
;W[oq]WL[63.792]
;B[mo]BL[87.576]
;W[nq]WL[61.01]
;B[no]BL[85.987]
;W[lp]WL[59.005]
;B[lo]BL[82.573]
;W[jq]WL[55.921]
;B[ip]BL[80.53]
;W[mr]WL[42.963]C[This is unfortunate. Most of your points in that corner are gone]
;B[ko]BL[77.119]
;W[pq]WL[38.149]
;B[qq]BL[72.077]
;W[qr]WL[36.79]
;B[rr]BL[64.555]
;W[ps]WL[28.118]
;B[rs]BL[55.068]
;W[qs]WL[22.654]C[This is a mistake - don't make this shape]
(;B[jr]BL[40.819]
;W[kr]WL[21.131]
;B[ks]BL[38.781]
;W[ls]WL[19.315]
;B[js]BL[37.388]
;W[lq]WL[8.209]
;B[em]BL[9.135]
;W[fj]WL[20]OW[5]
;B[ej]BL[7.497]
;W[di]WL[20]OW[5]
(;B[ci]BL[5.394]
;W[dj]WL[20]OW[5]
;B[dk]BL[3.965]
;W[ek]WL[20]OW[5]
;B[el]BL[2.136]
;W[ei]WL[20]OW[5]
;B[cl]BL[0.884]
;W[dn]WL[20]OW[5]
;B[dm]BL[20]OB[5]
;W[ah]WL[20]OW[5]
;B[ai]BL[20]OB[5]
(;W[af]WL[20]OW[5]C[This is just wrong]
;B[bj]BL[20]OB[5]
;W[bn]WL[20]OW[5]
;B[bm]BL[20]OB[5]
;W[an]WL[20]OW[5]C[This is note sente]
(;B[am]BL[20]OB[5]
;W[fl]WL[20]OW[5]
;B[en]BL[20]OB[5]
;W[fo]WL[20]OW[5]
(;B[fn]BL[20]OB[5]
;W[eo]WL[20]OW[5]
;B[gn]BL[20]OB[5]
;W[ho]WL[20]OW[5]
;B[hn]BL[20]OB[5]
;W[io]WL[20]OW[5]
;B[in]BL[20]OB[5]
;W[jn]WL[20]OW[5]
;B[jm]BL[20]OB[5]
;W[jo]WL[20]OW[5]
;B[km]BL[20]OB[5]
;W[kn]WL[20]OW[5]
;B[ln]BL[20]OB[5]
;W[lm]WL[20]OW[5]
;B[ll]BL[20]OB[5]
;W[mm]WL[20]OW[5]
(;B[im]BL[20]OB[5]C[Your two stones are fine]
;W[ml]WL[20]OW[5]
;B[lk]BL[20]OB[5]
;W[lj]WL[20]OW[5]
;B[mk]BL[20]OB[5]
;W[nk]WL[20]OW[5]
;B[mj]BL[20]OB[5]
;W[nj]WL[20]OW[5]
;B[ni]BL[20]OB[5]
;W[kk]WL[20]OW[5]
;B[ij]BL[20]OB[4]
;W[hj]WL[20]OW[5]
;B[jk]BL[20]OB[4]C[Well seen]
;W[jl]WL[20]OW[5]
;B[il]BL[20]OB[4]
;W[jj]WL[20]OW[5]
;B[hk]BL[20]OB[4]
;W[gk]WL[20]OW[5]
;B[jk]BL[20]OB[4]
;W[hl]WL[20]OW[5]
;B[gm]BL[20]OB[4]
;W[gl]WL[20]OW[5]
;B[ik]BL[20]OB[4]
;W[go]WL[20]OW[5]
;B[cn]BL[20]OB[4]
;W[do]WL[20]OW[5]
;B[bo]BL[20]OB[4]
;W[bp]WL[20]OW[5]
;B[ao]BL[20]OB[4]
;W[ap]WL[20]OW[5]
(;B[ag]BL[20]OB[4]C[Before this, give something on the top a try]
;W[be]WL[20]OW[5]
;B[ah]BL[20]OB[4]
;W[se]WL[20]OW[5]
;B[qe]BL[20]OB[4]
;W[gf]WL[20]OW[5]
;B[hs]BL[20]OB[4]
(;W[gs]WL[20]OW[5]C[You are behind, so start a ko here]
(;B[is]BL[20]OB[4]
;W[fr]WL[20]OW[5]
;B[]BL[20]OB[4]
;W[]WL[20]OW[5]TW[aa][ba][ca][da][ea][fa][ga][ha][ia][ja][ka][na][pa][qa][ra][sa][ab][bb][cb][db][eb][fb][gb][hb][ib][jb][lb][mb][ac][bc][cc][dc][ec][fc][gc][hc][ic][jc][mc][ad][bd][cd][ed][fd][gd][hd][ae][ce][de][ee][fe][ge][he][bf][cf][df][ef][ff][hf][dg][eg][fg][gg][eh][fh][gh][fi][gi][ej][gj][fk][cp][ep][fp][gp][aq][bq][cq][dq][eq][fq][gq][mq][ar][br][cr][dr][er][gr][lr][nr][or][pr][as][bs][cs][ds][es][fs][ms][ns][os]TB[pe][kf][mf][nf][of][kg][mg][ng][og][pg][qg][jh][lh][nh][oh][qh][rh][sh][bi][ki][qi][ri][si][aj][jj][kj][lj][nj][oj][rj][ak][bk][ck][kk][nk][pk][al][bl][dl][jl][kl][ml][nl][pl][rl][lm][mm][nm][pm][qm][sm][an][bn][mn][nn][pn][qn][rn][sn][po][qo][so][rq][sq][sr][ss]C[paK0 [17k\]: gg
Piotr [16k\]: thnx
])
(;B[gr]C[Giant ko for white, nothing for you]))
(;W[gr]C[White probably should have done this]
;B[gs]
;W[fs]
;B[is]
;W[fr]C[White still wins and there is no ko]))
(;B[cc]
;W[dc]
;B[db]
;W[eb]
;B[bb]
;W[da]
;B[ca]C[This is a simple way to get ko for life]
;W[cb]
;B[cq]C[This is a giant threat]
(;W[ba]C[If white just takes away the ko...]
;B[cp]
;W[dq]
;B[cr]
;W[dr]
;B[cs]C[You have won a free corner either way])
(;W[cp]C[If white responds]
;B[db]
;W[sq]C[This is a good threat]
;B[qn]
;W[cb]
;B[hs]C[This threatens to take away a lot of points on the bottom]
;W[ba]
;B[fs]C[I don't even know how to respond to something like this... and the previous ko threat works well with this one]
;W[dr]
;B[ds]
;W[cs]
;B[es]
;W[cr]
;B[fr]
;W[fq]
;B[gs]
;W[er]C[This reduction is huge])))
(;B[ml]
(;W[im]
;B[jl]
;W[kk]
;B[il]
;W[hm]
;B[hl]
;W[gm]
;B[gl]
;W[fm]
;B[fk])
(;W[jl]
;B[im])))
(;B[eo]TR[dn][fo]C[This is broken shape, push through this way]
;W[ep]
;B[fn]
;W[gn]
;B[go]
;W[fp]
;B[gm]
;W[hn]
;B[gl]))
(;B[cc]
;W[am]
;B[al]))
(;W[ag]))
(;B[dj]C[Your two stones are fine]
;W[ci]
;B[bi]
;W[bj]
;B[bk]
;W[aj]
;B[ak]
;W[ah]
;B[ai]))
(;B[os]
;W[pr]C[Free atari, bad shape, no more eye potential])
(;B[kr]C[You can do this]
;W[jr]
;B[js]C[Atari]
;W[lq]
;B[lr]C[Atari]
;W[mq]
;B[is]C[This is now sente. If white does not respond he is dead]
(;W[or])
(;W[di]
;B[os]
;W[pr]
;B[ks]
;W[ns]
;B[or]
;W[nr])))
(;B[np]
;W[oq]
;B[nq]
;W[or]
;B[nr]C[At this point all the white stones are dead]
(;W[qq]
;B[pq]
;W[pr]
;B[qr]
;W[rq]
;B[rr])
(;W[rr]
;B[qr]
;W[qq]
;B[rq]
;W[pq]
;B[sr])
(;W[qr]
;B[rr]
;W[qq]
;B[rq])))
(;B[po]C[Keep going after those stones]))
(;B[lm]C[This shoulder hit is important])
(;B[qp]C[This defends against the 3-3 invasion]))
(;B[lm]C[Defending your bottom right is pretty big]))
(;B[qj]C[Playing firmly here is fine. White cannot get more than 1 eye]
;W[rj]
;B[rk]
;W[si]C[One eye does not a living group make.]))
(;B[og]C[This move is called the nose hit - it is a good move to remember in these sort of situations]
(;W[ne]
;B[oe]
;W[nf]
;B[nh])
(;W[nh]
;B[oi]
;W[oh]
;B[ph]
;W[of]
;B[pg]
(;W[nf]
;B[pf])
(;W[ne]C[This cut looks danagerous, but white doesn't have enough liberties]
;B[pf]
;W[if]
;B[oe]
(;W[nf]
;B[ni]C[Black is fine])
(;W[jg]
;B[nf]C[Blac is still fine])))))
(;B[lh]C[Capping this stone directly would be better]))
(;W[oc]C[White can do this first]
;B[pa]
;W[ma]
;B[pc]
;W[la]
;B[od]))
(;W[od]
;B[ne]
;W[oc]C[White can do this first]))
(;B[oc]
;W[nb]
;B[ob]C[This still threatens to capture the 2 white stones]
;W[mb]))
(;B[kc]C[Keep white split. Keeping your opponent seperated and weak is an important fundamental.]))
(;B[jc]C[This may be better locally, but given that you have a framework I like the one on top better - no need to change direction going for the side.]))
(;B[pf]C[This builds the right and prepares to pincer the white stone.]))
(;B[ej]C[This would probably be a better local play if you want to damage the above white stone])
(;B[em]TR[fp]C[I also like this move as it threatens to surround white's corner]))