I will be commentating on a lot of moves probably, but do take them only as ideas / comments, not as set in stone rules.
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[6.50]
GN[p2501-Milker-711959-20120214]PW[Hannes (p2501)]PB[Alexey (Milker)]WR[5k]BR[16k]DT[2012-02-10,2012-02-14]GC[Game ID: 711959]PC[Dragon Go Server: http://www.dragongoserver.net/]RE[W+11.50]
;B[dd]
;W[pp]
;B[dp]
;W[pd]
;B[cl]C[A little odd, but playable I guess -
more common options would be
sanrensei or a kakari.
http://senseis.xmp.net/?SanRenSei
http://senseis.xmp.net/?Kakari]
;W[fc]
;B[cg]C[The Ogeima was a popular response in ancient China. Nowadays not so much, because it leaves a weak point at sansan.
http://senseis.xmp.net/?Ogeima
http://senseis.xmp.net/?Sansan]
;W[jd]
;B[hq]C[Too slow. Neither C8 nor H3 are a Shimari, so the corner is still weak. But its also not a good extension, for an extension along the side K3 would be much better. So H3 does neither really well and is thus a bad move overall.
http://senseis.xmp.net/?Shimari]
;W[mq]
;B[qf]
;W[qh]
;B[ph]C[This is playable and even joseki when the situation makes it necessary, but very uncommon because locally its better for white.]
;W[pi]
;B[pg]
;W[qj]
;B[qc]C[Naturally white would seperate with R16, I don't remember why I didn't do it.]
;W[pc]
;B[qd]
;W[pe]
;B[qe]
;W[md]C[Black got the corner and has access to the center between two white groups, so this looks like a success for black to me.]
;B[of]C[This move does not require an immediate response by white and thus black gave up the innitiative to white basically for free, because P14 does not gain much for black.]
;W[db]C[D18 aims at removing the weakness of white around H17. Black will get C17 which is in a good relationship with C13 (better than C14) - but do not make the mistake of thinking that thus the Ogeima is a better response to a Kakari than the Keima.
http://senseis.xmp.net/?Kakari
http://senseis.xmp.net/?Keima
http://senseis.xmp.net/?Ogeima
]
;B[cc]
;W[fe]
;B[fg]C[I found this a little off for black, looks thin.]
;W[df]C[Most likely the wrong way of playing for white.]
;B[ef]
;W[dg]
;B[cf]
;W[dh]
;B[fi]
;W[ch]
;B[de]
;W[dk]
;B[ck]
;W[cj]
;B[ej]
;W[dj]
;B[el]C[F8 looks better, because white will have less forcing moves I think.]
;W[ei]
;B[ek]
;W[bi]C[White is alive now, Blacks aim should now be finishing his shape (his weak points) locally in sente.
http://senseis.xmp.net/?Sente]
;B[bg]
;W[bk]
;B[bl]
;W[aj]
;B[ah]C[This and all the following moves black should reserve for later. Black is wasting a lot of Ko threats.
http://senseis.xmp.net/?Ko]
;W[ai]
;B[al]
;W[ak]
;B[dl]
;W[cq]C[Now the weakness of the lower left corner becomes apparent, black can not get a good result in this corner anymore. Also black will end up overconcentrated.]
(;B[cp]C[The wrong side to block I think. D3 looks much better for black, because of the double hane (see variation).
http://senseis.xmp.net/?Hane]
;W[dq]
;B[eq]
;W[er]
;B[fq]
;W[bp]
;B[fr]C[Blocking at B5 is more important.]
;W[bo]
;B[kp]
;W[qp]
;B[mo]C[Resembles the opening moves a lot. It looks like you are trying to fence in territory.]
;W[jl]C[Maybe a little deep and very daring from white.]
;B[nj]C[Blacks seems to intent on killing white. This is very risky for black.]
;W[mm]
;B[om]
;W[qm]C[White takes the time to help th bottom because blacks moves in the area are very thin and have a lot of aji.
http://senseis.xmp.net/?Aji]
;B[nn]C[Black having to make a move here shows that blacks earlier moves were inefficient.]
;W[mk]
;B[nk]
;W[nl]
;B[ol]
;W[kn]C[White should probably have made a move towards the top, rather then the bottom. To risky for white who was probably looking to cut there later.]
;B[ll]C[Good move, spoiling your opponents shape is always a good strategy.]
;W[ml]
;B[mj]
;W[lk]
;B[ln]
;W[lm]
;B[jn]
;W[mn]
;B[lo]
;W[no]C[There is the cut. Black has to protect from a second cut at P9, white will get a few forcing moves to get a better result at the right side.]
;B[oi]
;W[pk]
;B[ok]
;W[ki]
;B[km]
;W[kl]
;B[jm]
;W[ii]
;B[ig]
;W[hl]
;B[gn]
;W[if]
;B[hf]
;W[hg]C[I just did the crosscut out of principle, but it is a mistake by white I think. The result looks good for black.]
;B[hh]
;W[he]
;B[gf]
;W[jg]
;B[ih]
;W[jf]
;B[ge]
;W[gd]
;B[lq]
;W[np]
;B[mp]
;W[dn]
;B[dr]
;W[cr]
;B[ds]
;W[cs]
;B[es]
;W[aq]
;B[en]
;W[do]
;B[eo]
;W[mr]
;B[lr]
;W[im]
;B[in]
;W[fh]
;B[gh]
;W[eh]
;B[hi]
;W[ff]
;B[gg]
;W[ee]
;B[ec]C[Very good move, I had overlooked this.]
;W[fd]
;B[eb]
;W[fb]
;B[ea]
;W[gm]
;B[fm]
;W[gk]
;B[gj]
;W[ij]
;B[li]
;W[mg]
;B[oe]
;W[od]
;B[kh]
;W[kj]
;B[lg]
;W[lf]
;B[me]
;W[mf]
;B[nd]
;W[nc]
;B[ne]
;W[ld]
;B[le]
;W[ke]
;B[pb]
;W[ob]
;B[pf]
;W[oc]
;B[pa]
;W[mb]
;B[fa]
;W[hb]
;B[ga]
;W[ha]
;B[oo]
;W[op]
;B[rh]
;W[ri]
;B[qg]
;W[qi]
;B[sh]
;W[si]
;B[rf]
;W[ls]
;B[ks]
;W[ms]
;B[jr]
;W[pn]
;B[on]
;W[eg]
;B[pl]
;W[ql]
;B[po]
;W[qo]
;B[pm]
;W[qn]
;B[dm]
;W[bn]
;B[fl]
;W[hn]
;B[ho]
;W[hm]
;B[fo]
;W[jh]
;B[gl]
;W[hj]
;B[fk]
;W[kg]
;B[lh]
;W[bh]
;B[ag]
;W[oa]
;B[rb]
;W[nh]
;B[ng]
;W[mh]
;B[oh]
;W[gb]
;B[hk]
;W[il]
;B[ik]
;W[jk]
;B[gk]
;W[bm]
;B[am]
;W[ed]
;B[dc]
;W[co]
;B[ep]
;W[cm]
;B[an]
;W[ao]
;B[nf]
;W[pj]
;B[mi]
;W[kf]
;B[oj]
;TW[ia][ja][ka][la][ma][na][ib][jb][kb][lb][nb][gc][hc][ic][jc][kc][lc][mc][hd][id][kd][ie][je][ef][ci][di][ji][bj][jj][rj][sj][kk][qk][rk][sk][ll][rl][sl][rm][sm][cn][rn][sn][ro][so][ap][rp][sp][bq][nq][oq][pq][qq][rq][sq][ar][br][nr][or][pr][qr][rr][sr][as][bs][ns][os][ps][qs][rs][ss]TB[aa][ba][ca][da][qa][ra][sa][ab][bb][cb][db][qb][sb][ac][bc][rc][sc][ad][bd][cd][rd][sd][ae][be][ce][re][se][af][bf][sf][hg][og][rg][sg][gi][fj][em][fn][kn][go][io][jo][ko][fp][gp][hp][ip][jp][lp][gq][iq][jq][kq][er][gr][hr][ir][kr][fs][gs][hs][is][js]C[White: 71 territories + 2 prisoners + 6.5 komi = 79.5
Black: 63 territories + 5 prisoners = 68
Result: W+11.5]N[RESULT])
(;B[dq]
;W[cp]
;B[co]
;W[bo]
;B[bn]))
RU[Japanese]SZ[19]KM[6.50]
GN[p2501-Milker-711959-20120214]PW[Hannes (p2501)]PB[Alexey (Milker)]WR[5k]BR[16k]DT[2012-02-10,2012-02-14]GC[Game ID: 711959]PC[Dragon Go Server: http://www.dragongoserver.net/]RE[W+11.50]
;B[dd]
;W[pp]
;B[dp]
;W[pd]
;B[cl]C[A little odd, but playable I guess -
more common options would be
sanrensei or a kakari.
http://senseis.xmp.net/?SanRenSei
http://senseis.xmp.net/?Kakari]
;W[fc]
;B[cg]C[The Ogeima was a popular response in ancient China. Nowadays not so much, because it leaves a weak point at sansan.
http://senseis.xmp.net/?Ogeima
http://senseis.xmp.net/?Sansan]
;W[jd]
;B[hq]C[Too slow. Neither C8 nor H3 are a Shimari, so the corner is still weak. But its also not a good extension, for an extension along the side K3 would be much better. So H3 does neither really well and is thus a bad move overall.
http://senseis.xmp.net/?Shimari]
;W[mq]
;B[qf]
;W[qh]
;B[ph]C[This is playable and even joseki when the situation makes it necessary, but very uncommon because locally its better for white.]
;W[pi]
;B[pg]
;W[qj]
;B[qc]C[Naturally white would seperate with R16, I don't remember why I didn't do it.]
;W[pc]
;B[qd]
;W[pe]
;B[qe]
;W[md]C[Black got the corner and has access to the center between two white groups, so this looks like a success for black to me.]
;B[of]C[This move does not require an immediate response by white and thus black gave up the innitiative to white basically for free, because P14 does not gain much for black.]
;W[db]C[D18 aims at removing the weakness of white around H17. Black will get C17 which is in a good relationship with C13 (better than C14) - but do not make the mistake of thinking that thus the Ogeima is a better response to a Kakari than the Keima.
http://senseis.xmp.net/?Kakari
http://senseis.xmp.net/?Keima
http://senseis.xmp.net/?Ogeima
]
;B[cc]
;W[fe]
;B[fg]C[I found this a little off for black, looks thin.]
;W[df]C[Most likely the wrong way of playing for white.]
;B[ef]
;W[dg]
;B[cf]
;W[dh]
;B[fi]
;W[ch]
;B[de]
;W[dk]
;B[ck]
;W[cj]
;B[ej]
;W[dj]
;B[el]C[F8 looks better, because white will have less forcing moves I think.]
;W[ei]
;B[ek]
;W[bi]C[White is alive now, Blacks aim should now be finishing his shape (his weak points) locally in sente.
http://senseis.xmp.net/?Sente]
;B[bg]
;W[bk]
;B[bl]
;W[aj]
;B[ah]C[This and all the following moves black should reserve for later. Black is wasting a lot of Ko threats.
http://senseis.xmp.net/?Ko]
;W[ai]
;B[al]
;W[ak]
;B[dl]
;W[cq]C[Now the weakness of the lower left corner becomes apparent, black can not get a good result in this corner anymore. Also black will end up overconcentrated.]
(;B[cp]C[The wrong side to block I think. D3 looks much better for black, because of the double hane (see variation).
http://senseis.xmp.net/?Hane]
;W[dq]
;B[eq]
;W[er]
;B[fq]
;W[bp]
;B[fr]C[Blocking at B5 is more important.]
;W[bo]
;B[kp]
;W[qp]
;B[mo]C[Resembles the opening moves a lot. It looks like you are trying to fence in territory.]
;W[jl]C[Maybe a little deep and very daring from white.]
;B[nj]C[Blacks seems to intent on killing white. This is very risky for black.]
;W[mm]
;B[om]
;W[qm]C[White takes the time to help th bottom because blacks moves in the area are very thin and have a lot of aji.
http://senseis.xmp.net/?Aji]
;B[nn]C[Black having to make a move here shows that blacks earlier moves were inefficient.]
;W[mk]
;B[nk]
;W[nl]
;B[ol]
;W[kn]C[White should probably have made a move towards the top, rather then the bottom. To risky for white who was probably looking to cut there later.]
;B[ll]C[Good move, spoiling your opponents shape is always a good strategy.]
;W[ml]
;B[mj]
;W[lk]
;B[ln]
;W[lm]
;B[jn]
;W[mn]
;B[lo]
;W[no]C[There is the cut. Black has to protect from a second cut at P9, white will get a few forcing moves to get a better result at the right side.]
;B[oi]
;W[pk]
;B[ok]
;W[ki]
;B[km]
;W[kl]
;B[jm]
;W[ii]
;B[ig]
;W[hl]
;B[gn]
;W[if]
;B[hf]
;W[hg]C[I just did the crosscut out of principle, but it is a mistake by white I think. The result looks good for black.]
;B[hh]
;W[he]
;B[gf]
;W[jg]
;B[ih]
;W[jf]
;B[ge]
;W[gd]
;B[lq]
;W[np]
;B[mp]
;W[dn]
;B[dr]
;W[cr]
;B[ds]
;W[cs]
;B[es]
;W[aq]
;B[en]
;W[do]
;B[eo]
;W[mr]
;B[lr]
;W[im]
;B[in]
;W[fh]
;B[gh]
;W[eh]
;B[hi]
;W[ff]
;B[gg]
;W[ee]
;B[ec]C[Very good move, I had overlooked this.]
;W[fd]
;B[eb]
;W[fb]
;B[ea]
;W[gm]
;B[fm]
;W[gk]
;B[gj]
;W[ij]
;B[li]
;W[mg]
;B[oe]
;W[od]
;B[kh]
;W[kj]
;B[lg]
;W[lf]
;B[me]
;W[mf]
;B[nd]
;W[nc]
;B[ne]
;W[ld]
;B[le]
;W[ke]
;B[pb]
;W[ob]
;B[pf]
;W[oc]
;B[pa]
;W[mb]
;B[fa]
;W[hb]
;B[ga]
;W[ha]
;B[oo]
;W[op]
;B[rh]
;W[ri]
;B[qg]
;W[qi]
;B[sh]
;W[si]
;B[rf]
;W[ls]
;B[ks]
;W[ms]
;B[jr]
;W[pn]
;B[on]
;W[eg]
;B[pl]
;W[ql]
;B[po]
;W[qo]
;B[pm]
;W[qn]
;B[dm]
;W[bn]
;B[fl]
;W[hn]
;B[ho]
;W[hm]
;B[fo]
;W[jh]
;B[gl]
;W[hj]
;B[fk]
;W[kg]
;B[lh]
;W[bh]
;B[ag]
;W[oa]
;B[rb]
;W[nh]
;B[ng]
;W[mh]
;B[oh]
;W[gb]
;B[hk]
;W[il]
;B[ik]
;W[jk]
;B[gk]
;W[bm]
;B[am]
;W[ed]
;B[dc]
;W[co]
;B[ep]
;W[cm]
;B[an]
;W[ao]
;B[nf]
;W[pj]
;B[mi]
;W[kf]
;B[oj]
;TW[ia][ja][ka][la][ma][na][ib][jb][kb][lb][nb][gc][hc][ic][jc][kc][lc][mc][hd][id][kd][ie][je][ef][ci][di][ji][bj][jj][rj][sj][kk][qk][rk][sk][ll][rl][sl][rm][sm][cn][rn][sn][ro][so][ap][rp][sp][bq][nq][oq][pq][qq][rq][sq][ar][br][nr][or][pr][qr][rr][sr][as][bs][ns][os][ps][qs][rs][ss]TB[aa][ba][ca][da][qa][ra][sa][ab][bb][cb][db][qb][sb][ac][bc][rc][sc][ad][bd][cd][rd][sd][ae][be][ce][re][se][af][bf][sf][hg][og][rg][sg][gi][fj][em][fn][kn][go][io][jo][ko][fp][gp][hp][ip][jp][lp][gq][iq][jq][kq][er][gr][hr][ir][kr][fs][gs][hs][is][js]C[White: 71 territories + 2 prisoners + 6.5 komi = 79.5
Black: 63 territories + 5 prisoners = 68
Result: W+11.5]N[RESULT])
(;B[dq]
;W[cp]
;B[co]
;W[bo]
;B[bn]))
Overall I don't think I made a good job in the teaching game. I hope you had fun