(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[5.50]TM[32400]
PW[Ishida Yoshio]PB[Sakata Eio]WR[9d]BR[9d]DT[1975-07-21,22]EV[Honinbo,30,Japan,Mainichi]RO[7,Title match]PC[Tokyo (Nihon Kiin), Japan]SO[http://gobase.org/games/japan/titles/honinbo/30/game-7.sgf]C[This is a game between Ishida playing white and Sakata playing black, played in 1975]RE[W+21.50]
;B[pd]
;W[dc]
;B[dq]LB[ce:A]C[Black plays here to approach at A first.]
;W[qp]
;B[ce]
;W[do]
;B[cm]LB[co:A]C[This pincer threatens to connect at A. White has several ways to defnd against this]
(;W[bo]C[This is a fighting variation]
;B[fp]
(;W[en]C[A typical example of "your enemy's key point is yours".]
;B[dk]
(;W[hq]C[White starts a fight]
;B[hp]
;W[ip]
;B[ho]CR[en][bo][do]C[After these move the white marked seem to have been severely hurt, but white has a nice way to settle them]
;W[eq]C[a sacrificing technique. White hopes to sacrifice this stone to gain moves in the corner]
(;B[ep]
;W[dp]
(;B[dr]C[This was a surprising and special move.The idea is to not give white any forcing moves in the corner. Its drawback however is that white gets stronger on the lower side.]
(;W[gq]LB[gp:A]C[The advantage of this move is that there is now a cut at A. White is a bit more vulnerable at the lower side though]
;B[fq]
;W[fm]C[Again the point where both would like to play]
(;B[hm]C[In the game black did choose this jump]
;W[fk]
;B[kq]C[This gave him the opportunity to attack here]
(;W[io]C[This move looks strange, but is necessary]
;B[in]
(;W[kp]C[In the game Ishida played like this, which was good.]
;B[lp]
;W[ko]C[The commentary stops here.]
;B[jq]
;W[iq]
;B[op]
;W[gp]
;B[go]
;W[fo]
;B[fr]
;W[bq]
;B[br]
;W[cq]
;B[cr]
;W[di]
;B[ej]
;W[gj]
;B[eo]
;W[fn]
;B[dn]
;W[cn]
;B[dm]
;W[bm]
;B[bl]
;W[al]
;B[ak]
;W[am]
;B[aq]
;W[bp]
;B[hk]
;W[kl]
;B[ei]
;W[gh]
;B[hi]
;W[gi]
;B[dh]
;W[ji]
;B[ik]
;W[kj]
;B[ii]
;W[ig]
;B[jm]
;W[km]
;B[gl]
;W[fl]
;B[gk]
;W[cl]
;B[hg]
;W[hh]
;B[ih]
;W[jh]
;B[il]
;W[dl]
;B[ed]
;W[ec]
;B[fd]
;W[gc]
;B[gd]
;W[hc]
;B[hd]
;W[ic]
;B[fc]
;W[fb]
;B[gb]
;W[hb]
;B[eb]
;W[ga]
;B[cc]
;W[db]
;B[qf]
;W[oq]
;B[nq]
;W[pq]
;B[nr]
;W[qn]
;B[pi]
;W[cj]
;B[ck]
;W[bk]
;B[bj]
;W[aj]
;B[bi]
;W[eh]
;B[dj]
;W[dg]
;B[ch]
;W[dd]
;B[de]
;W[hf]
;B[ql]
;W[or]
;B[oc]
;W[qj]
;B[pj]
;W[qk]
;B[pl]
;W[qh]
;B[pk]
;W[rf]
;B[re]
;W[rg]
;B[ro]
;W[qo]
;B[nn]
;W[lo]
;B[rm]
;W[qe]
;B[rd]
;W[pg]
;B[pf]
;W[of]
;B[oe]
;W[ng]
;B[mh]
;W[mg]
;B[jg]
;W[if]
;B[kh]
;W[on]
;B[mo]
;W[lq]
;B[lr]
;W[mp]
;B[np]
;W[oo]
;B[no]
;W[nm]
;B[mm]
;W[ml]
;B[nl]
;W[om]
;B[mk]
;W[ll]
;B[ir]
;W[nk]
;B[mi]
;W[ol]
;B[oh]
;W[og]
;B[rk]
;W[rj]
;B[ki]
;W[jj]
;B[lf]
;W[sk]
;B[rl]
;W[ne]
;B[mf]
;W[nf]
;B[md]
;W[nd]
;B[nc]
;W[me]
;B[le]
;W[ld]
;B[mc]
;W[lg]
;B[kg]
;W[kf]
;B[ke]
;W[jf]
;B[je]
;W[qi]
;B[ie]
;W[gg]
;B[ff]
;W[oi]
;B[nh]
;W[ph]
;B[nj]
;W[rn]
;B[fj]
;W[li]
;B[lh]
;W[lj]
;B[oj]
;W[gf]
;B[sj]
;W[si]
;B[rh]
;W[sm]
;B[sl]
;W[mj]
;B[ni]
;W[sn]
;B[sj]
;W[ok]
;B[pe]
;W[pm]
;B[qg]
;W[sh]
;B[sf]
;W[ri]
;B[se]
;W[qm]
;B[sg]
;W[sk]
;B[fa]
;W[oi]
;B[gb]
;W[jr]
;B[kr]
;W[fb]
;B[co]
;W[em]
;B[gb]
;W[hr]
;B[js]
;W[fb]
;B[ln]
;W[ea]
;B[kn]
;W[cd]
;B[be]
;W[kb]
;B[bc]
;W[lb]
;B[mb]
;W[bd]
;B[ad]
;W[ef]
;B[lc]
;W[bb]
;B[jb]
;W[jc]
;B[kc]
;W[ab]
;B[fe]
;W[fg]
;B[la]
;W[ac]
;B[ae]
;W[cg]
;B[bg]
;W[ns]
;B[ms]
;W[os]
;B[ai]
;W[ek]
;B[ci]
;W[cf]
;B[bf]
;W[lm]
;B[mn]
;W[ap]
;B[ar]
;W[ak]
;B[jk]
;W[rh]
;B[kk]
;W[lk]
;B[ib]
;W[ia]
;B[ka]
;W[pp]
;B[fi]C[time used:
W 8h 38m 
B 7h 22m
])
(;W[ko]C[Note that this is bad shape]
;B[iq]C[black can cut here!]
;W[jq]
;B[jp]
;W[ir]
;B[jo]))
(;W[kp]C[This looks like a good move, but is dangerous.]
;B[jp]C[Black can cut here!]
(;W[jo]
;B[jq]LB[io:A][iq:B]C[White is cut at A or B])
(;W[jq]
;B[jo]
;W[lq]C[White can not capture black like this]
;B[kr]
(;W[lr]C[This is a ladder]
;B[jr]
;W[iq]
;B[lp]
;W[ko]
;B[mp]LB[kn:A][mr:B]C[A and B are miai for black.])
(;W[lp]
(;B[jr]
;W[iq]
(;B[io]C[When black plays here, black dies.]
;W[ir]C[White has 4 liberties, black 3.])
(;B[ir]C[When black plays here, there is a ladder..]
;W[io]
;B[in]
;W[jn]C[Not good for black]))
(;B[lr]C[Black should first play here]
;W[mr]
;B[mq]C[And cut..]
;W[nq]C[Black sacrifices a stone to make the ladder work in his favor]
;B[jr]
;W[iq]
;B[ir]
(;W[io]
;B[in]
;W[jn]C[This does not work for white anymore]
;B[ko])
(;W[hr]
;B[io]
;W[ls]
;B[gp]C[White is captured]))))))
(;B[fk]C[Black had a decision to make from which side to jump. You can consider this jump]
;W[hm]C[But like this it seems white gets strong on the lower side, when black moves out]
(;B[io]C[black needs to push from behind]
;W[jp]
;B[jo]
;W[kp]
;B[jm])
(;B[in]
;W[jp]
;B[im]
;W[gk]C[Also possible])))
(;W[fr]C[This is one way of playing for white]
;B[fq]
;W[gr]
;B[er]
;W[el])
(;W[gr]C[This leads to the same result]
;B[fq]
;W[fr]
;B[er]
;W[el])
(;W[fq]C[This is most often an overplay]
;B[gq]
;W[gr]
;B[gp]
;W[fr]
;B[iq]
;W[hr]
;B[ir]C[This is hard for white. And the six white stones will be captured. White can get some forcing moves though on the outside.]))
(;B[er]
;W[cq]
;B[fq]
;W[cr]C[The most simple variation. White was hoping for this. In this game this would be preferably for white. Black has difficulties finding a good move at the bottom]
(;B[oq]C[if black approaches..]
;W[mq]C[This pincer would work well for white.])
(;B[kp]C[This is a good shape move, but allows white to play the shimari]
;W[oq]SQ[ip][hq]C[There is still a lot of aji left in the two marked white stones]
;B[qj]
(;W[kr]C[White could connect underneath or..])
(;W[io]C[try to escape]))))
(;B[er]C[this is also possible]
;W[dp]LB[cq:A][fq:B]C[White plays here, making miai of playing A  and B]
(;B[iq]
;W[dr]
;B[fr]
;W[cq]
;B[jq]C[A joseki])
(;B[ep]C[This would revert back to the other varition]
;W[cq]
;B[fq]
;W[cr])))
(;W[gn]C[to run like this is not good, black gets both sides.]
;B[iq]))
(;W[oq]
;B[en]C[This would be perfect for black]))
(;W[oq]C[When white plays tenuki..]
;B[co]C[Black is connected]
;W[cp]C[White can not cut]
;B[dp]
;W[cn]
;B[bo]
;W[bn]
;B[dn]
;W[eo]
;B[bm]C[Black is a step ahead and captures white])
(;W[en]C[This prevents the connection and is one joseki]
;B[co]C[Black can't connect anymore]
;W[cp]
;B[dp]
;W[cn]
;B[bo]
;W[bn]
;B[bp]C[Black is cut])
(;W[cq]C[Another possibility]))
