(;FF[4]CA[UTF-8]PW[Cho Chikun]PB[Fujisawa Shuko]WR[9p, Meijin, Honinbo, Oza]BR[9p, Kisei]KM[5.5]DT[1983-02-02,03]AP[GoSWF:1.9]EV[Kisei,7,Japan,Yomiuri]PC[Toyama, Japan]RE[B+3.5]RO[3]SO[http://gobase.org//games/japan/titles/kisei/7/game-3.sgf]TM[32400]C[Comments by leopika 2k on KGS];B[pd];W[dd];B[pq];W[cp];B[ep];W[eq];B[fq];W[dq];B[fp];W[cn];B[pk]C[Black invite White to invade the South to try and bild territory in the Est.];W[jp];B[lp];W[jn];B[fm];W[jl];B[dm];W[cm];B[dl]SQ[bn][bo][ao][an][ap][bp][aq][bq][cq][cr][cs][bs][br][ar][dr][ds][as]C[The western black stones are now settled.White has 17 definite points in the corner plus komi = 22,5 points.Black, in the other hand, has good prospect in the East, plus a white group to target in the center.];W[po];B[qp];W[mp];B[mq];W[nq];B[np];W[mo];B[nr];W[no];B[oq];W[lq];B[kq];W[lo];B[lr]SQ[an][bn][ao][ap][bo][bp][aq][bq][cq][cr][cs][bs][br][ar][as][dr][ds][mr][ls][ms][ns][or][os][qs][pr][ps][qr][qq][rq][sq][sr][ss][rs][rr]MA[lq][nq]C[Black and white have settled their group in the center and have about the same amount of points.White: 22,5 pointsBlack: 21 points];W[qf]TR[pk]C[White invade, isolating the marked black stone.];B[qe]TR[pk]C[Black decide to protect the corner because he hasn't good prospects in the East anymore, and because making White stronger in the area isn't a problem, since the marked black stone can connect to the southern ones quite easily.];W[pf];B[nc];W[qi]TR[pk]C[Now is the time for Black to rescue his marked stone.];B[on];W[oo];B[qn]C[And Black connects happily.];W[ck]TR[dd][jl][pf]LB[cl:A]C[Going out now is ESSENTIALfor White: it binds somewhat all his stones together (see the relation between the marked stones and the one just played).Without it, Black would shut White in the corner with A, and it would then be very difficult for White to build anymore territory at all.];B[kc]C[Black limits White's influence cautiously.];W[dk];B[ek];W[ej];B[fk];W[fj];B[gj]TR[dd][fj][jl][pf]C[Black tries to break the relation between the marked white stones.];W[gk];B[gi];W[eh];B[il];W[jk];B[hk];W[cd]SQ[ce][be][ae][cc][cb][ca][ba][bb][bc][bd][ad][ac][ab][aa][cf][cg][ch][cj][ci][di][dj][dh][bf][bg][bh][bi][bj][af][ag][ah][ai][aj][ak][bk][al][bm][am][an][bn][bo][ao][ap][bp][aq][bq][cq][cr][cs][bs][br][ar][as][dr][ds][mr][ms][ls][ns][or][os][pr][ps][qr][qs][qq][sq][rq][rs][sr][rr][ss][ro][so][sp][rp][rn][sn][lb][mb][la][ma][el][fl][gl]MA[gk][lq][nq]LB[rf:A]C[White: 59,5 pointsBlack: 36 pointsEven if Black protected the corner with A, he still would be behind by about ten points.];B[fd]TR[pf][qf][qi]C[Now, thanks to that play, attacking the white marked stones would gain Black a lot of territory in the North and Center.];W[jd]TR[qf][pf][qi][jk][jl][jn][lo][mo][no][oo][po][mp][jp]C[White try to limit Black while connecting indirectly in the center his two marked groups.];B[jc];W[ic];B[ec];W[gc];B[ff];W[gd];B[ge];W[he];B[cb];W[gf];B[fe];W[df];B[eg];W[dg];B[fh]SQ[ce][cf][cg][bi][bh][bj][af][bf][bg][ag][ah][ai][aj][bk][ak][al][am][bm][bn][an][ao][bo][bp][ap][aq][bq][cq][cr][br][ar][as][bs][cs][dr][ds][hd][rg][rh][sh][sg][id][mb][ma][la][lb][kb][ka][ca][mr][ms][ls][os][ns][or][pr][ps][qs][qr][qq][rq][rr][rs][ss][sr][sp][so][sq][el][fl][gl][ab][ba][aa]MA[nq][lq][gk]LB[rf:A]C[White: 42,5 pointsBlack: 38 pointsNow, if Black could protect the corner with A, he would have an easy game, I think, because he would have more territory plus three white groups still unsettled to target.];W[qc]C[Therefore it's time for white to invade, even if it means damaging his marked stones in the process.]TR[pf][qf][qi];B[re];W[ob];B[nb];W[oc];B[od];W[rb];B[kd];W[na];B[ne]TR[gc][gd][he][gf][ic][jd][pf][qf][qi][jk][jl][jn][jp][lo][mo][no][oo][po][mp]C[Now, the three marked white groups become all targets for Black to attack.];W[je]TR[pf][qf][qi][jk][jl][jn][jp][lo][mo][no][oo][po][mp]C[White reinforce one his groups, but Black can still attack the other two.The efficiency of this attack will determine the game.];B[qj];W[pi];B[nk];W[mh];B[kj];W[lk];B[mi];W[ni];B[mj];W[ke];B[lh];W[mg];B[ml];W[ll];B[pn];W[im];B[ei];W[di];B[dh];W[ch];B[sc];W[sb];B[oa];W[pa];B[pc];W[pb];B[ra];W[qa];B[io];W[ii];B[jh];W[le];B[hl];W[hm];B[lg];W[mf]TR[jc][kc][kd][nb][nc][od][pd][pc][ne][qe][re][sc][hm][im][jn][jp][lo][mo][no][oo][po][mp][jl][jk][ii][lk][ll]LB[lg:A][mf:B]C[With the A-B exchange, Black definitively abandon his northern stones to try and kill the white ones in the center.];B[gl];W[mm];B[nn];W[jj];B[ki]LB[ih:A][if:B][hh:C][hg:D]C[Now, White can't connect his center stones to the northern ones.If White A, Black B.If White C, Black D.];W[hr];B[gr];W[go];B[ip];W[fc];B[hf]LB[ed:A]C[I'm not sure why Black is frightened to connect at A.I suppose the white stones in the center are too big of a threat for him to be greedy right now.];W[if];B[hg];W[er];B[hq];W[ed];B[ri];W[rh];B[rj];W[ig];B[ih];W[rf];B[qh];W[ph];B[fi];W[cj];B[hd];W[hc];B[sh];W[rg];B[dj];W[ej];B[do];W[fr];B[gs];W[dn];B[en];W[id];B[co];W[bo];B[dp];W[bq];B[oj];W[oi];B[cl];W[bl];B[jg];W[jf];B[nj];W[si];B[sj];W[pj];B[fs];W[es];B[ee];W[qk];B[ql];W[lf];B[de];W[ce];B[kg];W[eh];B[rk];W[dh];B[sg];W[sf];B[si]C[time used:W 8h 7m B 8h 59m])