Amazingly, Lee Changho lost to an amateur player (Han Taehee) in the 2nd BC Card Cup, in less than 100 moves!
Here is the game record.
(;
KM[6.5]
EV[2nd BC Card Cup 1st round]
FF[3]
SZ[19]
GM[1]
PW[Han Taehee]
WR[a6]
DT[2010-01-16]
BR[9d]
RE[W+R]
PB[Lee Changho]
;B[pd];W[dd];B[qp];W[dp];B[oq];W[qf];B[nc];W[rd];B[qh];W[qc];B[qe]
;W[re];B[pf];W[pg];B[qg];W[rf];B[og];W[gc];B[pj];W[fq];B[cj];W[cl]
;B[cf];W[ch];B[bh];W[bg];B[cg];W[bi];B[bf];W[ci];B[cc];W[cd];B[bd]
;W[dc];B[bc];W[jc];B[jp];W[oo];B[po];W[lo];B[on];W[lq];B[jn];W[no]
;B[op];W[jr];B[el];W[cn];B[cq];W[er];B[iq];W[ir];B[hq];W[fn];B[gl]
;W[nr];B[lm];W[or];B[je];W[nn];B[om];W[nm];B[nl];W[jm];B[km];W[im]
;B[mp];W[lp];B[kn];W[hn];B[mq];W[mr];B[mo];W[jk];B[ej];W[bj];B[dm]
;W[dn];B[kj];W[jj];B[ji];W[ii];B[ih];W[hi];B[eh];W[jh];B[ki];W[ig]
;B[fd];W[ff];B[cm];W[bm];B[en];W[eo];B[ef];W[ee])
BC Card Cup is a mixed tournament as amaterus can also participate. There were five Korean amateurs who each managed to defeat three professional players in a row to make it through the preliminaries, but of the five ones only Han Taehee won in the main tournament.
Yu Bin, a famous Chinese player who used to be in the top a few years ago, also lost to an amateur (Na Hyun).
Here is the game record between Yu Bin 9p and Na Hyun 6 dan amateur: Yu Bin, playing black, lost by half a point.
(;
RE[W+0.5]
WR[a6]
KM[6.5]
FF[3]
SZ[19]
GM[1]
PB[Yu Bin]
BR[9d]
EV[2nd BC Card Cup integration preliminary tournament final]
DT[2010-01-13]
PW[Na Hyun]
;B[pd];W[dd];B[qp];W[dp];B[fq];W[hq];B[cf];W[fc];B[bd];W[cn];B[oq]
;W[qf];B[qh];W[of];B[nd];W[pi];B[qe];W[qi];B[rf];W[qg];B[rg];W[rh]
;B[og];W[ph];B[nf];W[qn];B[dr];W[cq];B[fo];W[ho];B[fm];W[hm];B[fk]
;W[dk];B[hc];W[cc];B[ci];W[di];B[dh];W[ei];B[cj];W[ek];B[hl];W[en]
;B[fn];W[im];B[eh];W[gj];B[ep];W[bc];B[do];W[co];B[dq];W[cp];B[lq]
;W[lc];B[jc];W[oc];B[pf];W[nc];B[pc];W[md];B[cl];W[em];B[cm];W[gl]
;B[fl];W[gk];B[fj];W[fi];B[el];W[fh];B[br];W[cr];B[cs];W[bq];B[dn]
;W[bs];B[as];W[aq];B[bm];W[ar];B[hi];W[gi];B[le];W[kd];B[fb];W[eb]
;B[ie];W[je];B[jf];W[id];B[jd];W[ke];B[he];W[kf];B[ql];W[rp];B[qq]
;W[pm];B[pl];W[ol];B[ok];W[pk];B[rn];W[ro];B[pj];W[qk];B[rl];W[rk]
;B[om];W[nl];B[pn];W[qo];B[qm];W[po];B[nm];W[np];B[nq];W[mp];B[ml]
;W[nk];B[mn];W[op];B[kr];W[lo];B[mk];W[nj];B[mj];W[km];B[ni];W[oj]
;B[jg];W[lm];B[mm];W[kg];B[ji];W[kp];B[me];W[jb];B[ic];W[gd];B[hd]
;W[kc];B[pb];W[jh];B[ih];W[kh];B[hg];W[ki];B[jj];W[kj];B[jk];W[kk]
;B[mh];W[rr];B[qr];W[jr];B[rq];W[dm];B[dl];W[gf];B[hf];W[eo];B[jl]
;W[kl];B[oi];W[qj];B[gp];W[be];B[ce];W[cd];B[bf];W[ad];B[jo];W[ko]
;B[jq];W[kq];B[ir];W[lr];B[js];W[mq];B[jp];W[nr];B[jm];W[eg];B[ef]
;W[ff];B[ee];W[fd];B[sr];W[oh];B[nh];W[io];B[jn];W[il];B[or];W[iq]
;B[na];W[sg];B[pg];W[sf];B[re];W[se];B[sd];W[sh];B[rd];W[dg];B[ch]
;W[pp];B[pq];W[gb];B[hr];W[af];B[bg];W[ib];B[hb];W[ha];B[qh];W[qg]
;B[mb];W[mc];B[ka];W[lb];B[hk];W[hj];B[in];W[hn];B[ik];W[gm];B[la]
;W[oa];B[ob];W[nb];B[ma];W[od];B[gc];W[fa];B[do];W[dn];B[pa];W[kb]
;B[oe];W[gq];B[gr];W[bn];B[sk];W[sj];B[sl];W[sn];B[rm];W[ja];B[oa]
;W[ck];B[bk];W[ag];B[ah];W[ae];B[lf];W[lg];B[mg];W[mo];B[an];W[ao]
;B[am];W[on];B[pm];W[nn];B[ds];W[bs];B[ij];W[gh];B[hh];W[ne];B[bo]
;W[bp];B[nd];W[os];B[ps];W[ns];B[ls];W[mr];B[ed];W[ec];B[ne];W[go]
;B[bh];W[fg];B[ge];W[fe];B[sq];W[so];B[ks];W[hp];B[fp];W[qh];B[qf]
;W[li];B[mi])
Iyama Yuta of Japan then restored things to “the natural order” and eliminated Na Hyun. Here is the game record: Iyama Yuta, playing white, won by resignation.
(;
KM[6.5]
EV[2nd BC Card Cup 1st round]
FF[3]
SZ[19]
GM[1]
PW[Iyama Yuta]
WR[9d]
DT[2010-01-16]
BR[a6]
RE[W+R]
PB[Na Hyun]
;B[qd];W[pp];B[dc];W[cp];B[ep];W[od];B[ld];W[qe];B[re];W[pe];B[rf]
;W[qc];B[rc];W[pd];B[rd];W[ph];B[qb];W[gq];B[er];W[dn];B[fo];W[ck]
;B[hp];W[dq];B[eq];W[kp];B[hq];W[de];B[ce];W[cf];B[cd];W[dg];B[fc]
;W[nq];B[ro];W[rp];B[qp];W[qo];B[qq];W[rq];B[po];W[qn];B[pq];W[op]
;B[rn];W[rr];B[qm];W[pn];B[om];W[pm];B[pl];W[on];B[nn];W[oo];B[rl]
;W[mf];B[fh];W[gf];B[dk];W[cj];B[cl];W[dl];B[co];W[do];B[dp];W[cn]
;B[bo];W[bp];B[dm];W[bl];B[el];W[cm];B[mc];W[nc];B[lf];W[lg];B[me]
;W[nf];B[kf];W[kg];B[jf];W[jg];B[ig];W[ed];B[gb];W[if];B[ie];W[ih]
;B[hg];W[hf];B[hh];W[ii];B[hi];W[id];B[he];W[ge];B[hd];W[ij];B[ol]
;W[qk];B[ql];W[hj];B[fj];W[dj];B[fg];W[ef];B[gl];W[oj];B[kr];W[cr]
;B[dr];W[cq];B[ll];W[nk];B[mm];W[lk];B[lq];W[lp];B[nr];W[mq];B[mr]
;W[or];B[jl];W[mo];B[jq];W[gd];B[hc];W[bf];B[kk];W[kj];B[mk];W[lj]
;B[mj];W[mi];B[be];W[ec];B[eb];W[ae];B[ad];W[af];B[os];W[ns];B[ms]
;W[pr];B[dd];W[nl];B[ml];W[nm];B[qj];W[pj];B[qi];W[hl];B[gm];W[in]
;B[hm];W[km];B[jm];W[kl];B[kn];W[jk];B[jn];W[ln];B[pi];W[oi];B[oh]
;W[og];B[qh];W[nh];B[pg];W[pf];B[oh];W[db];B[fd];W[ee];B[cb];W[ph]
;B[cs];W[qg];B[br];W[rj];B[rk];W[rh])
You can find the tournament table at this link; make sure to look at both top-most (main tournament) and second from the top (preliminary) tables.
