(;GM[1]FF[4]AP[Drago:3.17]SZ[19]CA[UTF-8]DT[29-9-1861]RE[w+3]PW[shusaku]PB[murase shuho]GN[6]EV[jubango]WR[7d]BR[6d]US[sgf by arthur koks]SO[Invincible, the games of shusaku]CP[J. Power and Kiseido Publishing Company]GC[tainaka shin 9d
amk = arthur mathieu koks 6k ];B[qd];W[dc];B[pq];W[oc];B[pe];W[co]
(;B[nd]
(;W[qk]C[important];B[qo];W[qh];B[nc]
;W[jc]C[aiming to develop 4];B[ce];W[fd]
;B[ep]C[high approach appropriate here because shimari in the SE];W[dq];B[eq];W[dr];B[iq];W[od]
(;B[oe]C[natural but dubious probably without thinking];W[nb]
(;B[lc];W[mb];B[kc];W[qb];B[rb];W[pb]
(;B[jb];W[rc];B[rd];W[qc];B[ic];W[cd];B[de];W[gc];B[ci]
;W[ne]C[severe, b needs to sacrifice 11 &  7];B[pg];W[me];B[ph];W[qi]
(;B[ie]
;W[mc]C[big, b's thickness neutralized];B[oj];W[qm];B[cm];W[er];B[ff];W[ng];B[pi]
;W[om]C[this move and b's previous are calm responses to b's 47 & 49. W is gathering strength to handle b's framework. getting ready for the big jump.];B[ld];W[md];B[mp];W[gq];B[be];W[bd]
(;B[lj]
;W[ck]C[key point, necessay to restore territorial balance.];B[bo];W[cn];B[dm];W[bn];B[bm];W[ek];B[an];W[bp];B[fm];W[gk]
;B[gp];W[fq]
(;B[ei];W[hl];B[io]
;W[kk]C[pressure on b's right group, helps w to establish his group. game-determining moves.];B[kj];W[km];B[im];W[il];B[ml]
;W[dj]L[bk][ei]C[stops bA in sente, another rerason that B was wrong];B[di]
(;W[ko];B[kp];W[mo];B[lp];W[no];B[op]
;W[jj]C[w is virtually settled, b failed; game is close now.];B[ji];W[ij];B[hb];W[gb];B[rn]
;W[qq]L[qn][rm]C[perfect timing. worth studying.
( w needs A and/or B preferably in sente )]
(;B[rm]C[first variant is maybe more reasonable but rejected because of being docile.];W[ok];B[nk];W[pr];B[or];W[nq];B[np];W[oq];B[pp];W[nr]
;B[pl]C[b needs compensation for his 20 points loss below.];W[qf];B[ql]
;W[re]C[settled, so b switches to centre group];B[jm];W[jl];B[ll];W[kl];B[fl];W[fk];B[gi];W[gn];B[go];W[fn]
;B[en];W[bl];B[bj];W[al];B[jo];W[el];B[em];W[fo];B[fp];W[eo]
;B[do];W[dp];B[gm]
(;W[dn];B[hn];W[do];B[hm]
;W[am]C[w caculated this before w96.];B[se]
(;W[sf];B[sd];W[qe]
(;B[pd];W[qg];B[of];W[rk];B[sg];W[rf];B[qr];W[os];B[rq];W[qs]
;B[rr];W[lr];B[ad];W[ac];B[ae];W[bb]
;B[ln]C[gains 20 points, compensation for loss at the bottom. but not enough];W[pk];B[ol];W[lg];B[pj];W[qj];B[kn];W[mi];B[nj];W[ir];B[jr]
;W[hq];B[ip];W[hr];B[ga];W[fa];B[ha];W[ec];B[lb];W[gg];B[fb]
;W[ea];B[ih];W[gf];B[ge];W[ef];B[fg];W[ee];B[eb];W[da]
;B[db]C[amk: why 179, 187 & 189?];W[ca];B[gd];W[cg];B[bg];W[jg];B[ig];W[eg];B[fe];W[jf];B[kr]
;W[je];B[jd];W[if];B[hf];W[sc];B[lq];W[ls];B[rs];W[ps];B[hc]
;W[fc];B[dd];W[ed];B[mh];W[hg];B[he];W[li];B[nh];W[ii];B[hh]
;W[ni];B[mg];W[mf];B[oh];W[jh];B[ki];W[lh];B[rl];W[sk];B[nf]
;W[cf];B[bf];W[hi];B[gh];W[gj];B[ch];W[eh];B[cj];W[bk];B[mq]
;W[mr];B[ke];W[le];B[kf];W[lf];B[aj];W[hp];B[ho];W[lm];B[mm]
;W[sl];B[ma];W[na];B[la];W[sm];B[sn];W[is];B[ej];W[dk];B[fh]
;W[cc];B[fj])
(;B[qg]
;W[pd]C[some exchange]))
(;W[pf];B[of];W[og];B[rf];W[qg];B[qe];W[rg];B[nf];W[mf]
;B[mg]C[w looses the fight]))
(;W[hn];B[hm]
(;W[dn])
(;W[am];B[dn];W[ao])))
(;B[qp];W[pr];B[qr];W[oq];B[pp];W[np];B[nq];W[mq];B[or];W[jp]
(;B[jo];W[jq];B[ip]
;W[kr]L[ir][lo]C[next A and B miai for w]
(;B[ir];W[lo];B[lq];W[mr];B[lr];W[ls])
(;B[lo];W[ir]))
(;B[jq]L[jo][lo]C[necessay but w has A and B later for massive thickness]))
(;B[qr];W[pr];B[or];W[pp];B[oq];W[rr];B[ps];W[po]
;B[qp]L[qn][rm][rq][rp]C[next A or B is sente for w making him comfortable.
(AMK: I'm not sure wB is sente, b tenuki, wC-> bD ? )];W[rm];B[aa];W[rq];B[rp]
(;W[rs];B[sq])
(;W[so];B[sp])
(;W[sp];B[so]))
(;B[pp];W[rp]
(;B[ro]
;W[rr]C[troublesome for b])
(;B[pr];W[rm]
;B[sn]L[po][qn]C[A and B are W's sente now again giving him a  outward strength.]))
(;B[pr];W[po]
;B[pp]L[qn][rm]C[adequate compensation because A and B are sente again]))
(;W[ss];B[bk]
(;W[bl];B[al];W[bj];B[cl];W[cj])
(;W[bj];B[cj];W[bl];B[cl];W[ak];B[ej];W[dk];B[fk];W[fl];B[fj]
;W[el])))
(;B[hl]C[better]))
(;B[bo];W[bp]
;B[lj]L[ck]C[now w's invasion at a is harder.]))
(;B[ld]C[centre fight would be too much of a burden for b with his groups split up.]))
(;B[jd]
(;W[rc];B[rd];W[qc]
;B[ic]C[better than the game])
(;W[ic];B[id];W[hc]
;B[oh]C[reasonable game for b])))
(;B[mb]C[logical continuation after w21. but not advisable here, that is why b21 is a mistake being corrected here.];W[pb];B[na];W[ob];B[me]
;W[qc]L[nf]C[b's thickness is ineffective, even threatened by w's peep at a.]))
(;B[ob];W[pb];B[nb];W[oe];B[pc];W[pf];B[qc];W[qe];B[re]
;W[qf]C[b has corner profit in sente so is satisfied]))
(;W[mc];B[qk];W[md];B[me];W[le]
;B[lf]C[ideal shape for b]))
(;B[qk]
;W[md]C[different game, also possible]))