Choi Cheolhan met Kim Jiseok (7 dan) at the challenger's decision match and played 3 games against him.
Kim Jiseok took the early lead when he beat Choi at the first game. Choi opened the game with a recently fashionable approach, white 10. As a result, white got potential at the right side while black captured a big corner at the upper right. White later played a ko fight and use it to invade black's bottom right corner. Later, white let black's group at the right side escaped and captured 3 stones in the center to help his group at the left side.
Kim Jiseok
The first game's record:
Kim Jiseok (black) vs. Choi Cheolhan (white). Result: B+3.5
(;CA[Windows-1252]SZ[19]AP[MultiGo:4.4.4]EV[54th Korean Kuksu, title match #1]DT[2010-12-22]
PB[Kim Jiseok]BR[7p]PW[Choi Cheolhan]WR[9p]KM[6.5]RE[B+3.5]MULTIGOGM[1]
;B[pd];W[dd];B[qp];W[dq];B[co];W[oq];B[mp];W[qf];B[pi];W[md];B[qe];W[pf];B[oe];W[pe]
;B[qd];W[od];B[of];W[og];B[nd];W[oc];B[nc];W[pc];B[rf];W[rg];B[qc];W[nb];B[mc];W[ne]
;B[nf];W[me];B[pg];W[qg];B[mb];W[qb];B[rb];W[pb];B[na];W[ph];B[mf];W[lf];B[mg];W[po]
;B[qo];W[pn];B[qn];W[pm];B[qm];W[ql];B[pl];W[qk];B[pk];W[qi];B[pp];W[op];B[oo];W[no]
;B[on];W[om];B[nn];W[nm];B[mn];W[mm];B[ln];W[lm];B[km];W[kn];B[kl];W[mk];B[lp];W[jn]
;B[jp];W[oa];B[ob];W[qr];B[qj];W[rj];B[pj];W[rk];B[rr];W[nb];B[le];W[ld];B[ob];W[kq]
;B[kp];W[nb];B[ke];W[lb];B[ob];W[rq];B[pr];W[nb];B[lc];W[kd];B[ob];W[mo];B[lo];W[nb]
;B[kc];W[jd];B[ob];W[rs];B[or];W[nb];B[ma];W[rc];B[rd];W[jc];B[ob];W[ra];B[sc];W[nb]
;B[kb];W[sb];B[rc];W[mi];B[kf];W[se];B[qa];W[re];B[sa];W[jb];B[ob];W[jg];B[pa];W[cf]
;B[fq];W[fp];B[gp];W[ep];B[gq];W[dl];B[lj];W[lk];B[em];W[dm];B[dn];W[en];B[eo];W[fn]
;B[fo];W[go];B[do];W[gn];B[cq];W[bq];B[cr];W[kk];B[di];W[bo];B[bp];W[fk];B[fh];W[ff]
;B[hh];W[fi];B[fg];W[gf];B[dg];W[cg];B[ch];W[df];B[gi];W[ei];B[eh];W[hj];B[ck];W[dj]
;B[cj];W[bl];B[if];W[jf];B[je];W[ie];B[kg];W[kh];B[lg];W[bn];B[dk];W[ek];B[bg];W[bi]
;B[ig];W[he];B[jh];W[bh];B[ri];W[si];B[qh];W[rh];B[nj];W[mj];B[nh];W[rm];B[in];W[im]
;B[hn];W[ho];B[hm];W[io];B[il];W[hl];B[jm];W[gm];B[ij];W[im];B[ik];W[ii];B[ji];W[jj]
;B[dc];W[cc];B[cd];W[ec];B[db];W[bd];B[hc];W[ic];B[ed];W[ce];B[fc];W[fd];B[ee];W[ef]
;B[gb];W[ap];B[cp];W[hq];B[cb];W[bb];B[hi];W[jl];B[jk];W[hk];B[kj];W[ll];B[gd];W[gr]
;B[fr];W[ir];B[oh];W[qi];B[gs];W[hs];B[hr];W[gg];B[hp];W[gh];B[ar];W[jl];B[ih];W[ip]
;B[iq];W[eb];B[ea];W[fe];B[fb];W[ni];B[oi];W[rp];B[pq];W[rn];B[cm];W[cl];B[cn];W[bm]
;B[ha];W[ca];B[aq];W[gj];B[ps];W[nr];B[nq];W[ec];B[hd];W[id];B[eb];W[lh];B[nk];W[ao]
;B[ro];W[so];B[qq];W[sr];B[nl];W[ol];B[ok];W[ka];B[la];W[ja];B[np];W[qs];B[ki];W[km]
;B[ng];W[pg];B[sd];W[sf];B[ec];W[de];B[hb];W[ba])
At the second game, Choi who took black played a territory oriented game. He played Low Chinese Opening and then invade at 3-3 early in the game. White sacrificed his 6 stones to get some extra stones at the upper side. The game ended with both players got big chunk of moyo.
Choi Cheolhan
The second game record:
Choi Cheolhan (black) vs. Kim Jiseok (white). Result: B+2.5
(;CA[Windows-1252]SZ[19]AP[MultiGo:4.4.4]EV[54th Korean Kuksu, title match #2]DT[2010-12-24]
PB[Choi Cheolhan]BR[9p]PW[Kim Jiseok]WR[7p]KM[6.5]RE[B+2.5]MULTIGOGM[1]
;B[pd];W[dd];B[pq];W[dq];B[do];W[co];B[cn];W[cp];B[qk];W[dn];B[jq];W[nc];B[pf];W[pb]
;B[qc];W[kc];B[cm];W[en];B[cj];W[ch];B[cc];W[dc];B[cd];W[de];B[bf];W[cf];B[ce];W[bg]
;B[df];W[cg];B[db];W[eb];B[cb];W[fc];B[ej];W[be];B[bd];W[af];B[ab];W[el];B[fh];W[ef]
;B[bi];W[po];B[np];W[qq];B[qr];W[qp];B[rr];W[qm];B[nn];W[mo];B[op];W[on];B[om];W[nm]
;B[ol];W[rk];B[rl];W[no];B[oo];W[mn];B[pn];W[qn];B[pm];W[ql];B[rj];W[pk];B[qj];W[pl]
;B[pj];W[ok];B[nl];W[oj];B[lq];W[oh];B[qh];W[ml];B[nn];W[mm];B[mk];W[pg];B[qg];W[nk]
;B[on];W[ne];B[lk];W[of];B[km];W[pe];B[qf];W[qe];B[re];W[jk];B[li];W[jo];B[ko];W[dk]
;B[dj];W[fi];B[bo];W[bp];B[jh];W[gi];B[an];W[lg];B[hh];W[gh];B[hi];W[hj];B[ij];W[gk]
;B[dh];W[dg];B[hk];W[gj];B[ck];W[ik];B[jn];W[ig];B[kg];W[ji];B[ni];W[oi];B[lf];W[ih]
;B[ng];W[og];B[ke];W[jf];B[mg];W[oe];B[qd];W[jd];B[gq];W[fr];B[fq];W[gr];B[er];W[eq]
;B[hr];W[dr];B[qb];W[ho];B[hp];W[oc];B[go];W[in];B[im];W[gn];B[fo];W[pr];B[or];W[di]
;B[gs];W[es];B[hm];W[hn];B[fn];W[gm];B[fm];W[fl];B[dl];W[rm];B[sk];W[rq];B[sq];W[qa]
;B[ra];W[pa];B[rc];W[ap];B[ei];W[eh];B[ld];W[lc];B[sp];W[ek];B[em];W[eo];B[ep];W[dp]
;B[fp];W[ci];B[ro];W[qo];B[hl];W[gl];B[ki];W[kj];B[je];W[ie];B[jg];W[kl];B[ll];W[nh]
;B[mh];W[nj];B[mi];W[md];B[dm];W[do];B[jp];W[io];B[pc];W[ob];B[ea];W[fa];B[da];W[if]
;B[kf];W[mf];B[lh];W[bj];B[aj];W[ah];B[od];W[ao];B[bn];W[pi];B[nd];W[me];B[ad];W[qi]
;B[ri];W[ip];B[iq];W[ai];B[bk];W[kn];B[ln];W[pp];B[ps];W[ae];B[fj];W[bh];B[bj];W[sm]
;B[sl];W[kd];B[le];W[fs];B[hs];W[kk];B[fk];W[gg];B[jm];W[ii];B[lm];W[jj];B[sr];W[mc])
The final game was played at 5 January. This time Kim Jiseok played black while Choi played white. So far Choi played all his games at the main round with white and won by resignation.
Black opened the game with Mini Chinese Opening. Both players exchanged their corners early with move 63 and 64. Choi showed his fighting skill with He attacked a strong group (black's group at m12) and successfully trapped it. Kim Jiseok resigned after 174 moves.
The third game's record
Choi Cheolhan (whitr) vs. Kim Jiseok. Result: W+R
(;CA[Windows-1252]GM[1]AP[MultiGo:4.4.4]SZ[19]FF[3]EV[54th Kuksu challenger decision match round 3]
DT[2011-01-05]PB[Kim Jiseok]BR[7d]PW[Choi Cheolhan]WR[9d]KM[6.5]RE[W+R]MULTIGOGM[1]
;B[pd];W[dp];B[qp];W[cd];B[fq];W[dn];B[kq];W[iq];B[jo];W[eq];B[fp];W[hp];B[go];W[ho]
;B[hn];W[gn];B[fn];W[gm];B[fm];W[in];B[hm];W[gl];B[jm];W[fl];B[im];W[em];B[hr];W[lq]
;B[hq];W[kr];B[cq];W[kp];B[er];W[cp];B[bq];W[dj];B[ip];W[jp];B[io];W[ko];B[jn];W[nc]
;B[pf];W[ic];B[ed];W[df];B[ef];W[eg];B[cc];W[bc];B[bd];W[dc];B[ce];W[cb];B[dd];W[cg]
;B[ec];W[dr];B[dq];W[de];B[cc];W[ep];B[db];W[fr];B[oc];W[pq];B[qq];W[mb];B[pr];W[bf]
;B[ob];W[qj];B[ql];W[rl];B[qm];W[qg];B[qf];W[pg];B[kc];W[kb];B[jb];W[jc];B[lb];W[kd]
;B[lc];W[ld];B[ib];W[of];B[og];W[ne];B[rg];W[rh];B[rf];W[pi];B[ng];W[mc];B[ka];W[hc]
;B[ni];W[rm];B[rn];W[qk];B[hb];W[kg];B[je];W[jd];B[mf];W[hf];B[jg];W[jh];B[ig];W[lf]
;B[ih];W[me];B[fg];W[ee];B[ff];W[fe];B[eh];W[gh];B[dg];W[ch];B[gd];W[ie];B[ej];W[ek]
;B[di];W[ci];B[gj];W[ji];B[fk];W[el];B[ii];W[jj];B[li];W[ij];B[hj];W[hg];B[hh];W[gg]
;B[lg];W[kf];B[hk];W[lh];B[mh];W[kh];B[nk];W[pl];B[pn];W[be];B[sm];W[pm];B[qn];W[nl]
;B[ok];W[pk];B[nm];W[ml];B[ol];W[om];B[nn];W[mk];B[kk];W[nj];B[oj];W[mj];B[oi];W[lj]
;B[kj];W[mi];B[ki];W[kl];B[jk];W[mm])
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