(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]KM[6.50]TM[60] PW[Qiao Zhijian]PB[Magist]WR[4p]BR[9p]RO[07]PC[Tygem]C[another of the standard pro vs master openings a more territorial game. Highlights 25-37 Master loosely seals W in, leaving weaknesses behind but bringing everything together very nicely with miai of 32 and 33. !! 58-72 This corner invasion should be more standard, but I've never seen it before professionally and can't find it on waltheri. Master shows how to play good shape to fight back - sacrificing a bit of territory is ok. !!]RE[B+Resign]TC[3]TT[20] ;B[pd] ;W[dd] ;B[qp] ;W[dq] ;B[nq] ;W[qf] ;B[nc] (;W[qj]C[is there a better shape?] ;B[co] ;W[ck] ;B[fp] ;W[ep]C[in the recent few years this move has become particularly popular, though it seems strangely crude on first sight, perhaps opinions will treat this less favourably now.] (;B[eo] ;W[fq] ;B[gp] ;W[gq] ;B[hp] ;W[hq] ;B[ip] (;W[iq] ;B[ci] ;W[jp] ;B[cf] (;W[fc] (;B[ej]C[more of a global attack, aiming to loosely surround W, more flexible than D10, I think this is more respectful that W has already spent a move at K4, and so is willing to let W live while fixing the shape in sente, and the support at C14 is also important or else W C13 would be powerful.] ;W[el] (;B[jo]C[this seems to try to protect the F5 cut or help seal W in but if it is not necessary, it may lose a lot] (;W[kp] ;B[gk]C[even with the K5 exchange, this sort of move seems risky with weaknesses. It normally requires a strong understanding of the local position, or the shape may break if W gets out.] (;W[cm]C[this looks like W is worried about death and with good reason this is a vital shape point] ;B[dp] ;W[eq] ;B[fm]C[this shape is too good, all B's stones are working well, including K5 - now B is solid (though not much clear territory yet), but the main problem is W is awkward to make life - Master seemed to guarantee a miai of two good points] ;W[bi] ;B[bh] ;W[bj]C[W still not completely alive and depends on outside weakness such as the C12 cut, D6 peep, E9 sente] (;B[cc]C[W can't hope for much trying to separate this stone as the side group is weak] ;W[cd] ;B[bd] ;W[dc] ;B[bb] ;W[cb] ;B[bc] ;W[ic] ;B[gd]C[not directly a ladder maker (is that the term?) for C12, but trying to protect the various cuts (D11, F10), and creating potential in the centre] (;W[he]C[a master style exchange to make B heavy!] (;B[ge] ;W[hb]C[later W G14 or B H14 looks good] ;B[rd]C[!! Master also plays this move, I almost wondered if it hates this as too passive. It seems that it knows to think of this as a territory game, with no big moyo - W has already lived in B's area, and in return B has stolen the corner territory.] (;W[bp]C[excellent shape locally, but a little suspect as being slow. It seems that W is worried that B will really aim to kill given the help at G15, or at least that W can't do anything in the centre without worrying for the life and death.] (;B[qh]C[interesting this makes the W shape locally look bad - R14 is misplaced] (;W[qn]C[seems to be an overplay] (;B[ql] (;W[ph]C[standard technique, but it doesn't do that much for your eyespace] ;B[pg] ;W[pi] ;B[qg] ;W[qq]C[expected, but the result seems bad for W - it seems that the O3 corner protection is still quite well placed - perhaps pros need to adjust their thinking about this enclosure.] ;B[pq] ;W[rp] ;B[rq] ;W[qr] ;B[ro] ;W[pp] ;B[qo] ;W[oq] ;B[op] ;W[pr] ;B[po] ;W[np] ;B[pq] ;W[or]C[a big territory gain for W locally, but the Q12 group has no eyespace] (;B[nh]C[calm and steady to attack, but actually very powerful, making territory, by defending against P13, and mapping out huge centre potential, and also good for L17, not just attacking.] ;W[oo]C[W tries to punish B for not exchanging the atari yet] ;B[on] ;W[pp] ;B[no] ;W[op] ;B[pn]C[but B's area is reduced quite a bit, but Q12 has even less eyespace now.] ;W[ni] ;B[mi] ;W[nj] ;B[mj] ;W[nk] ;B[mk] ;W[nl] ;B[lm]C[completely miserable for W] ;W[oh] ;B[og] ;W[qk] ;B[pl] ;W[rl] ;B[rm] ;W[sk] ;B[ri] ;W[mm] ;B[mn] ;W[ll]C[does this gain anything? as while it guarantees B will protect at N12 now (as B won't sacrifice N6 when W hasn't yet made life), but it seems to be proper to protect N12 anyway, and this loses points locally I guess W feared a tenuki such as H14 to protect] ;B[ml] ;W[nm] ;B[kn]C[B gains a few points protecting here] ;W[mh] ;B[ng] ;W[rj] ;B[lh] ;W[hf] ;B[hh] ;W[lc] ;B[bo] ;W[ch] ;B[dh] ;W[cg] ;B[bg] ;W[dg] ;B[eh] ;W[df] ;B[ce] ;W[fg] ;B[de] ;W[ff] ;B[ee] ;W[hg] ;B[ih] ;W[jg] ;B[jh] ;W[nb] ;B[ob] ;W[mb] ;B[md] ;W[oc] ;B[pc] ;W[oa] ;B[pb] ;W[ke] ;B[db] ;W[eb] ;B[ca] ;W[mf] ;B[mg] ;W[me] ;B[ne] ;W[dj] ;B[ek] ;W[fl] ;B[em] ;W[fi] ;B[gi] ;W[dl] ;B[gl] ;W[cp] ;B[do] ;W[ap] ;B[rr] ;W[kg] ;B[ld] ;W[kd] ;B[fh] ;W[di] ;B[pk] ;W[pj] ;B[hd] ;W[id] ;B[ed]C[B+R]) (;B[no]C[this does seem bad shape, you lose the N4 atari] ;W[mp]C[as W N5 is big for both the centre and hurting the right side and the P6 peep remains])) (;W[od]C[what about this alphago technique?] ;B[oc] ;W[pe] ;B[qd] ;W[ph])) (;B[op]C[hoping for a corner protection] ;W[pl])) (;W[qm]C[the stable way to go])) (;B[ql]C[I'm still not at a level where I understand why the invasion is better] (;W[ph]C[as this looks painfully submissive with big endgame remaining for both sides S14 vs S15, S8 vs S10, still the S12 weakness, perhaps Master thinks R6 isn't really territory as the corner is still weak and there is the R6 invasion. Perhaps it is also to do with the centre]) (;W[oj]C[or perhaps it is fear of something else? this seems risky] ;B[qh]C[but perhaps this is more W can do to fight here with the extra move?] (;W[pg]C[this seems risky] ;B[ph] ;W[oh] ;B[og]) (;W[od]C[some sacrifice aji?] ;B[oc] ;W[pe] ;B[qd] ;W[ph])))) (;W[bn]C[this is also a shape, hard to say which is better for points as though B4 was bigger, it is a weak shape, and W's life and death needs consideration])) (;B[gc]C[this seems unlikely] ;W[ff] ;B[fd] ;W[df])) (;W[gc] ;B[kc]C[after this, J16 is a superb follow up]) (;W[hb] ;B[] ;W[lc]C[if W is solid, G16 may become a very good exchange])) (;B[bn] ;W[bm] (;B[bl] ;W[dn] ;B[do] ;W[dj] ;B[di] ;W[ek] ;B[fj] ;W[al]) (;B[dl]C[shape to kill, but too much aji around]))) (;W[fm]C[it would be nice to try to poke at the weaknesses first] ;B[gn]C[but there doesn't seem to be much issue] ;W[cm] ;B[dp] ;W[eq] ;B[bj]C[B might take sente to kill]) (;W[gl]C[there is probably an eye, but not much shape weakness] ;B[hl] ;W[fk]C[very crude] ;B[fj] ;W[hk] ;B[gj] ;W[hm] ;B[il] ;W[fn] ;B[dp] ;W[eq] ;B[fo]C[still hard for W to find shape] ;W[gn] ;B[cm]C[very painful])) (;W[gl]C[a possibility] (;B[kp] ;W[jq]C[the B shape remains awkward] ;B[in] ;W[cm]) (;B[ko] ;W[gj]))) (;B[gk]C[this does feel like bad shape, perhaps that is why W dared to play like this] ;W[gl] ;B[hl] ;W[gm] ;B[hm] ;W[gn] ;B[fo] ;W[hn]C[in this sort of variation, a B stone at K5 is vital])) (;B[dj]C[B might do this to break the eyespace more if B had K4, but if W will probably get out and E5 will be weak] (;W[el]) (;W[fo]C[its possible that master is also thinking that D10 captures a little too small if B has to give up the 4 stones, but I doubt that is the main reason]))) (;W[fo]C[this seemed to work quite well (game 9)])) (;W[jq])) (;B[fq]C[this is also a joseki shape without C9])) (;W[pk]C[master played this (game 10), but with some support on the left] ;AW[fc][do]AB[bd][cf]))