(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]SZ[19]KM[6.50]PW[Yamashita Keigo]PB[Kobayashi Satoru]WR[9p]BR[9p]EV[Kisei Sen]PC[Japan]DT[2007-02-22,02-23]GN[Kisei game 4]RO[4]RE[W+R];B[pd];W[dp];B[pq];W[dd];B[fq];W[cn]
;B[jp]C[Good old "Kobayashi fuseki" - I didn't see this in a while in professional games!
I actually don't have any professional game from 2006 with this fuseki - last one I have is from 2005.];W[qf];B[pi];W[pn];B[qp];W[pk];B[nd];W[op];B[oq];W[mp]
(;B[oo]L[po]C[One variation on Cyberoro shows black at A instead - see the variation.];W[hq]TR[op]C[Wow - it looks like white wants to play everywhere! He's treating his triangle marked stone lightly - it can be sacrificed. He is in no hurry to defend in the lower right and end up with 2 heavy groups.]
(;B[on]L[hp][ip][jq]C[My first instinct is to play at A with Black ( a la "Lessons in the fundamentals") - but that may be just what white wants, since it will likely result in white connecting his stones on the lower side after Black A, White B - seee the variation.

Black can also consider C to prevent white from connecting - see the Cyberoro variation.

Also, Black want to eliminate aji in the lower right.];W[jq];B[kq]
;W[kp]TR[hq][jq][kp][mp][kq][jp]C[By the way, the local position with the triangle marked stones is pretty famous - it is normally pretty easy for white to settle one way or another.
In this particula case black has many stones in the neighborhood, though, so it's a little tougher for white than usual.];B[lq];W[jo];B[ip];W[iq];B[io];W[ko];B[mq];W[gp];B[in];W[km]
;B[il];W[fp]
;B[kk]C[This capping attack is very severe - White took profit in the lower left in exchange - although that's not all territory yet.
I would have played here instead of White's last move

Black looks good to me - I wouldn't want to be White in this position.];W[ml]
;B[ol]L[mj]C[Black is starting a splitting attack. The other option for Black is to keep playing keima, with A];W[mj]
(;B[ok]L[nk][jk]C[A Cyberoro variation showed Black peeping at A instead - which looks raw, but it's meant for Black to be able to keep sente and defend against White B, which proved severe in the game. See the variation.];W[jk]C[White counterattacks - black's prospective profit in the lower right is too large, white has to be aggressive.];B[jl];W[kl]
;B[lk]L[jj]C[Black would love to start a ladder with A - only if it worked for him.];W[mk];B[jn];W[kn];B[ik];W[jj];B[ii];W[ij];B[hj]
;W[hi]C[Wow - white is super aggressive.
Black - the initial attacker - went under attack himself. This happened a lot to Kobayashi Satoru in this Kisei series, unfortunately for him.];B[gi];W[hh];B[ki];W[gj];B[hk];W[ji];B[fj];W[ih]
;B[dn]L[li][gk]C[Ladder-breaker - black wants to be able to play at A without worrying about white B.];W[li]C[White eliminated the bigger threat.];B[cm];W[co]
;B[dm]C[White got very thick in the center, where he was under attack, and black hardly got enough compensation - I don't think this result is good for black

My current notes on this game end here for now.];W[pl];B[dq];W[eq];B[er];W[ep];B[cq];W[fr];B[fs];W[gr];B[pm]
;W[qm];B[om];W[pj];B[oj];W[qi];B[qh];W[ph];B[oi];W[ri];B[qj]
;W[rl];B[rh];W[rj];B[pg];W[kc];B[cf];W[ce];B[df];W[ec];B[gh]
;W[bo];B[fd];W[fc];B[hd];W[pb];B[qc];W[mc];B[bf];W[be];B[jd]
;W[ap];B[jc];W[qb];B[cc];W[bc];B[rb];W[nc];B[kb];W[lb];B[kd]
;W[lc];B[jb];W[ne];B[od];W[le];B[kh];W[kj];B[lh];W[mh];B[mg]
;W[nh];B[me];W[mf];B[md];W[pc];B[rd];W[lg];B[kg];W[lf];B[ld]
;W[ma];B[rn];W[oh];B[qg];W[qn];B[ro]
;W[pf]C[Black resigned.])
(;B[nk]C[Cyberoro variation.];W[mk]
;B[ij]TR[pk][ml][mk][mj]L[jk]C[White cannot connect his triangle stones together, and Black isn't worried about A anymore.]))
(;B[hp];W[ip]
(;B[iq]C[Black cannot cut here - both sides ladders are in White's favor.];W[io]
(;B[hr];W[jq];B[gq]
;W[kp]C[This ladder favors White - black cannot play like this.])
(;B[jq]
;W[gp]C[Again, ladder favors White.]))
(;B[io];W[iq];B[gp];W[jq];B[kp]
;W[lr]L[ho][jo]C[White has connected his stones on the lower side, and Black still has A and B to worry about - I guess Black didn't like this variation.]))
(;B[jq];W[po];B[np];W[no];B[pp];W[on];B[mo];W[op];B[nq];W[mn]
;B[lo];W[ln];B[ko]
;W[oh]C[Cyberoro variation: Black took a lot of proft on the lower side, but White's attack is very severe now that white built thickness.]))
(;B[po];W[oo];B[on];W[pm]
;B[nn]C[This looks more severe for Black (or "clear cut" in the proper sense - it doesn't give white many choices).]))
