(;
GM[1]FF[4]VW[]AP[Many Faces of Go:11.0]
SZ[19]
HA[0]
ST[0]
PB[Yim Sungun]
PW[Chang Hao]
DT[1994-02-09]
PC[Korea]
KM[5.5]
RU[Korean]
RE[B+R]
AN[A.Dinerchtein, 1-dan pro]
EV[China-Korea Go Exchange, 1st]
CP[Go4Go]
BR[8p]
WR[6p]
WT[China]
BT[Korea];B[pd]
C[One of my teachers in Korea, Yim Sungun, 9-dan passed away on \
March, 28 at the age of 49, because of cancer.
http://www.youchanghyuk.com/news/viewpage.asp?pagec=1&seq=7057&gubun=all
 Today I would like to present one of his best games. 
The 1st China vs Korea Go Exchange (1994). Yim Sungun, 8-dan \
(Black) vs Chang Hao, 6-dan]
;W[dp];B[pq];W[dd];B[fq];W[cn];B[jp]
C[The favorite opening of my teacher]
;W[qn]
;B[qp]
(;W[pj]
C[White has two ways to extend -]

(;B[qh]
C[Black has few options -]
;W[on];B[mp]
C[Black can start from the peep at X (a probe)]
MA[pm]
;W[jc];B[cf];W[df];B[dg]
(;W[ce]
C[This joseki was really popular about 10 years ago. Lee Changho, \
9-dan developed it a lot -]
;B[ef];W[de];B[bf]
C[Black is playing for territory. It is also possible to connect \
at A or jump at B]
LB[eg:A][gg:B]
;W[eg];B[dh];W[eh];B[di];W[ei]
C[I would prefer to capture the marked stone directly]
TR[ef]

;B[dk]
C[Black is happy to answer]
;W[ff];B[be];W[nc]
C[It is usually better to defend the corner at X]
MA[cc]
;B[cc]
C[A huge move]
;W[dc]
(;B[pf]
C[The most solid answer -]
;W[qc]
C[Is it better to start from the attachment at X?]
MA[qi]
;B[pc];W[pb];B[qd];W[rb];B[rc];W[qb];B[pm]
(;W[qm]
C[The right answer -]
;B[pl];W[ql];B[rj]
C[The vital point]
;W[nl];B[pn]
(;W[ri]
C[A big mistake -]
;B[po];W[rk];B[qj]
C[It seems, that White missed this tesuji]
;W[qi];B[pi]
(;W[ph]
C[It is not easy for White to find the answer -]
;B[oi];W[rh];B[pk];W[pg];B[oj];W[qf]
C[Is it better to connect at X?]
MA[sj]
;B[og];W[of]
;B[oh];W[pe];B[nf]
C[Black may play at X directly]
MA[sj]
;W[ne];B[sj]
C[Anyway, the trade is clearly favorable for Black]
;W[mf];B[lh];W[jl];B[cb]
C[The largest place on the board]
;W[jn]
;B[dr];W[cq];B[cl]
C[Black's advantage is clear]
;W[ip];B[jq]
C[The most solid answer]
;W[cr];B[ep];W[eo];B[fo];W[gp]
;B[fp];W[gn];B[io]
C[A good move, preparing the connection]
;W[go];B[gq];W[lg];B[kh];W[mh];B[lj];W[mi]
;B[ng];W[mg];B[mj]
(;W[jo]
C[White missed the last chance here -]
;B[jj]
C[Now Black has a clear lead on territory and the position is extra-thick. \
We can say, that the game is already over. This is the last note.]
;W[lo];B[hp];W[in];B[jf];W[lp];B[lq];W[mq]
;B[nq];W[ho];B[hq];W[kq];B[mr];W[lr];B[dq];W[do];B[jr];W[je]
;B[ie];W[if];B[eb];W[jg];B[hc];W[gb];B[fc];W[hb];B[fd];W[fe]
;B[kf];W[kg];B[hf];W[ig];B[ic];W[id];B[hd];W[he];B[ib])
(;W[li];B[ki];W[kj]
C[This was the last chance to make the game complicated]
))
(;W[qk];B[oj];W[pk];B[rh];W[sj];B[ok]
C[Black's wall would be really huge]
))
(;W[po];B[qo];W[pk];B[oo];W[ol];B[pp];W[om];B[po];W[rk]
;B[qj];W[qk];B[nj];W[ph];B[qg];W[mi]
C[This is the best way to defend the group]
))
(;W[pn];B[qm];W[om];B[rn];W[ro];B[rm];W[qo];B[ol]
C[The fight would be hopeless for White]
))
(;B[pc];W[ne];B[pg]
C[This is another possibility]
))
(;W[ef];B[ce];W[cd];B[cj];W[fd]
C[This variation is suitable only for handicap games]
))
(;B[pl];W[ql];B[pm];W[qm];B[pn];W[pk];B[qh];W[rj];B[nm]
C[It is possible to create the wall]
)
(;B[ql];W[pl];B[pk];W[ok];B[qk];W[pm];B[qj];W[pi];B[qh]
C[It is also possible to invade and destroy White's territory]
))
(;W[qk];B[qi];W[on];B[pm];W[pn];B[mp];W[ok];B[nc]
C[It is not easy to decide, which plan is better]
))