Posts Tagged ‘ama vs pro’

How Strong Are Professional Players?

Sunday, March 28th, 2010

Just how strong are top professional go players compared to amateur players?

This question comes up again and again. The replies vary a lot, from saying that current amateurs are so strong that there is little difference between them and top professionals, to saying that there is such a huge gap that amateurs can never get any close to top professionals levels.

It is being said that top Asian amateurs are quite close in strength to mid-level (5 dan) professionals. It is not easy to get a very accurate comparison though due to the fact that there are few chances for amateurs and top professionals to play together. One interesting data point is the series of results of the annual games between the professional Honinbo and amateur Honinbo in Japan. The handicap is adjusted each year according to the previous year’s result, and the handicap seems to vary between 2 and 3 stones.

A very big surprise came recently when Lee Changho was defeated in BC Cup by a Korean ex-insei amateur. A few years ago Fernando Aguilar, a very strong Argentinian amateur, defeated two 9 dan professionals in a row in Toyota and Denso Cup.

These kinds of exceptional results are keeping the amateurs hopes high. But exceptional results are statistical improbable. We have to look at several games to draw a meaningful conclusion.

At the recently finished Shusaku Cup organized in Romania there were two Chinese professional players invited (Luo Xihe 9p and Huang Yizhong 7p), and they played teaching games with several top players. Last year the guests were Mok Jinseok 9p and Kim Seung-Jun 9p of South Korea. The professional guests gave between 2 and 4 stones handicap to several European players rated 5-7 dan and won almost all games both in 2009 and 2010 editions. This shows that professional players are very very strong.

Pal Balogh 6d received 3 stones from Luo Xihe 9p and won by 3.5 points. This is the only instance when the amateur player won in the series of the Shusaku Cup demo/teaching games that I saw.

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]HA[3]KM[0.5]TM[1800]OT[10/300 Canadian] GN[Shusaku Cup 9p demo game]PW[Luo Xihe]PB[Pal Balogh]WR[9p]BR[6d]DT[2010-03-27]PC[Tirgu Mures, Romania]AB[pd][dp][pp]RE[B+3.50] ;W[dc] ;B[de] ;W[nq] ;B[lq] ;W[qf] ;B[qh] ;W[pm] ;B[np] ;W[of] ;B[nd] ;W[pi] ;B[oq] ;W[lc] ;B[me] ;W[jd] ;B[rd] ;W[oc] ;B[od] ;W[nc] ;B[pc] ;W[qi] ;B[cc] ;W[cn] ;B[cl] ;W[en] ;B[fp] ;W[dh] ;B[db] ;W[ec] ;B[eb] ;W[cd] ;B[bc] ;W[hq] ;B[go] ;W[fr] ;B[bp] ;W[dr] (;B[ip] ;W[iq] ;B[jp] ;W[dk] ;B[bn] ;W[co] ;B[bo] ;W[cp] ;B[ck] ;W[cq] ;B[fc] ;W[cj] ;B[bj] ;W[bi] ;B[bk] ;W[rp] ;B[qo] ;W[ro] ;B[qn] ;W[qq] ;B[pr] ;W[rn] ;B[qm] ;W[qr] ;B[rf] ;W[rg] ;B[qe] ;W[sf] ;B[pf] ;W[qg] (;B[pg] ;W[ph] ;B[og] ;W[hc] ;B[fe] ;W[kr] ;B[kq] ;W[ql] ;B[rm] ;W[rl] ;B[nm] ;W[nr] ;B[mq] ;W[or] ;B[pq] ;W[ps] ;B[os] ;W[ns] ;B[mr] ;W[cf] ;B[ce] ;W[be] ;B[df] ;W[bg] ;B[dl] ;W[dj] ;B[sn] ;W[rr] ;B[pl] ;W[pk] ;B[ol] ;W[gb] ;B[hl] ;W[bq] ;B[bm] ;W[jl] ;B[re] ;W[ri] ;B[jk] ;W[kk] ;B[ik] ;W[ll] ;B[kj] ;W[lj] ;B[li] ;W[ki] ;B[jj] ;W[mj] ;B[mi] ;W[ok] ;B[km] ;W[lm] ;B[kl] ;W[nl] ;B[om] ;W[kn] ;B[lk] ;W[mk] ;B[jn] ;W[kk] ;B[jm] ;W[bd] ;B[dd] ;W[pb] ;B[qb] ;W[ob] ;B[cg] ;W[bf] ;B[dg] ;W[ch] ;B[kh] ;W[nh] ;B[qs] ;W[rs] ;B[je] ;W[id] ;B[kd] ;W[kc] ;B[ie] ;W[fh] ;B[gh] ;W[gi] ;B[hi] ;W[gg] ;B[hh] ;W[hg] ;B[ig] ;W[qa] ;B[rb] ;W[gn] ;B[fi] ;W[he] ;B[gj] ;W[ac] ;B[ab] ;W[ad] ;B[bb] ;W[fo] ;B[gp] ;W[qs] ;B[jr] ;W[ir] ;B[jq] ;W[eq] ;B[ep] ;W[ng] ;B[nf] (;W[lg] ;B[gd] ;W[hd] ;B[sl] ;W[js] ;B[ms] ;W[os] ;B[sk] ;W[rj] ;B[aq] ;W[ar] ;B[ap] ;W[br] ;B[hn] ;W[so] ;B[sm] ;W[mn] ;B[no] ;W[gm] ;B[hm] ;W[jg] ;B[if] ;W[jh] ;B[ji] ;W[kg] ;B[ih] (;W[ni] ;B[ko] ;W[ln] ;B[ra] ;W[ge] ;B[pa] ;W[mc] ;B[ei] ;W[di] ;B[se] ;W[sg] ;B[ks] ;W[is] ;B[lr] ;W[fb] ;B[rk] ;W[qk] ;B[gl] ;W[qp] ;B[pn] ;W[fk] ;B[em] ;W[fn] ;B[fq] ;W[gq] ;B[dq] ;W[er] ;B[eh] ;W[fg] ;B[eg] ;W[nn] ;B[on] ;W[ff] ;B[hf] ;W[gf] ;B[ef] ;W[gk] ;B[hk] ;W[hp] ;B[ho] ;W[gc] ;B[fd] ;W[fa] ;B[ea] ;W[oh] ;B[oe] ;W[aj] ;B[ak] ;W[ai] ;B[sj] ;W[si] ;B[oa] ;W[na] ;B[qa] ;W[lo] ;B[lp] ;W[mo] ;B[lk] ;W[ml] ;B[mp] ;W[kk] ;B[el] ;W[ek] ;B[lk] ;W[le] ;B[ke] ;W[mf] ;B[mh] ;W[md] ;B[mg] ;W[ne] ;B[sq] ;W[sr] ;B[me] ;W[lf] ;B[ld] ;W[ne] ;B[gr] ;W[gs] ;B[me] ;W[lh] ;B[ki] ;W[ne] ;B[hs] ;W[hr] ;B[me] ;W[cb] ;B[ca] ;W[ne] ;B[rh] ;W[sh] ;B[me] ;W[ed] ;B[ne] ;W[ee] ;B[fj] ;W[kk]C[Game record not complete. Reportedly, black won by 3.5p. The result would have been jigo if white didn't make a mistake in yose, earlier.]) (;W[ko])) (;W[sl] ;B[mg] ;W[lf])) (;B[hc])) (;B[el]))

Ilia Shikshin 7d received 2 stones from Luo Xihe 9p and lost by 0.5 points.

(;FF[4]GM[1]SZ[19]ST[2]CA[UTF-8]AP[SGFC:1.16] GN[Demonstration Shusaku Cup 2010] PB[Ilia Shikshin] BR[7d] HA[2] PW[Luo Xihe] WR[9p] KM[0.5] DT[2010-03-26] PC[Tirgu Mures, Romania] RE[W+0.5] TM[1800] OT[10/300 Canadian] RU[Japanese] AB[pd][dp];W[dc];B[pq];W[qo];B[qk];W[qf];B[qh];W[cn];B[fq];W[nc] ;B[pf];W[ci];B[jc];W[pg];B[of];W[qg];B[qe];W[qc];B[rf];W[pc] ;B[rg];W[hc];B[de];W[cd];B[eh];W[ie];B[lc];W[md];B[ke];W[ei] ;B[fi];W[fh];B[eg];W[di];B[ge];W[gi];B[fj];W[gh];B[gc];W[ff] ;B[hd];W[ed];B[np];W[qq];B[qr];W[rr];B[pr];W[rp];B[rn];W[qn] ;B[rm];W[qm];B[ql];W[om];B[jp];W[mn];B[lo];W[hq];B[hp];W[iq] ;B[ip];W[gq];B[fp];W[lr];B[mr];W[kq];B[jr];W[jq];B[gr];W[mq] ;B[nr];W[ko];B[kp];W[lp];B[mo];W[hr];B[kn];W[gp];B[go];W[fo] ;B[gn];W[fr];B[er];W[gs];B[ml];W[nk];B[pp];W[pl];B[oj];W[mk] ;B[lk];W[lj];B[kk];W[mi];B[cl];W[cp];B[cq];W[do];B[dq];W[el] ;B[bp];W[ji];B[dm];W[em];B[dn];W[fn];B[eo];W[gm];B[in];W[ic] ;B[id];W[gb];B[fc];W[fb];B[jb];W[ec];B[fe];W[ee];B[hb];W[jm] ;B[jn];W[ck];B[bk];W[bl];B[dk];W[cj];B[bm];W[dl];B[cm];W[gf] ;B[rd];W[rc];B[bj];W[bi];B[hm];W[gl];B[mb];W[nb];B[hl];W[en] ;B[co];W[hk];B[ik];W[hj];B[ga];W[eb];B[nh];W[he];B[ib];W[ij] ;B[jk];W[mm];B[nl];W[ok];B[pk];W[ll];B[lm];W[nq];B[oq];W[oo] ;B[op];W[nm];B[kl];W[ng];B[og];W[ni];B[oi];W[mh];B[jf];W[oh] ;B[ph];W[ig];B[qp];W[ro];B[rq];W[sq];B[sc];W[sb];B[sd];W[qb] ;B[rs];W[sn];B[rl];W[ls];B[sr];W[kg];B[jg];W[jh];B[od];W[na] ;B[mp];W[lq];B[je];W[aj];B[al];W[ld];B[kd];W[la];B[lb];W[ma] ;B[lg];W[kh];B[mg];W[nf];B[ne];W[nh];B[me];W[po];B[ms];W[ka] ;B[es];W[fs];B[oc];W[kb];B[kc];W[ob];B[no];W[ai];B[ak];W[nn] ;B[if];W[hf];B[nd];W[mc];B[fa];W[ea];B[ha];W[fd];B[gd];W[ol] ;B[ll];W[sm];B[sl];W[so];B[nj];W[mj];B[lh];W[kj];B[li];W[ja] ;B[gk];W[fk];B[sp])

Ondrej Silt 6d received 3 stones from Luo Xihe 9p and lost by resignation.

(;FF[4]GM[1]SZ[19]ST[2]CA[UTF-8]AP[SGFC:1.16] GN[Demonstration game Shusaku-cup 2010 board 1] EV[Demonstration game Shusaku-cup 2010 board 1] PB[Ondrej Silt] BR[6d] HA[3] PW[Luo Xihe] WR[9p] KM[0.5] DT[2010-03-25] PC[Tirgu Mures, Romania] RE[W+R] TM[3600] OT[1x10 byo-yomi] RU[Japanese] US[HW9x9] AB[pd][dp][pp];W[dc];B[de];W[nq];B[lq];W[gp];B[ip];W[dn];B[eo] ;W[gn];B[en];W[no];B[pn];W[in];B[ko];W[nm];B[km];W[pl];B[pq] ;W[el];B[em];W[dl];B[fl];W[fm];B[dm];W[cl];B[cm];W[iq];B[jq] ;W[dr];B[dq];W[il];B[fk];W[di];B[hq];W[gq];B[ho];W[go];B[er] ;W[ir];B[hr];W[hp];B[jr];W[io];B[is];W[fd];B[fe];W[ge];B[ff] ;W[fi];B[cc];W[cb];B[cj];W[ci];B[bl];W[dj];B[bk];W[bj];B[ck] ;W[dk];B[ed];W[fc];B[gf];W[he];B[cd];W[nc];B[hf];W[ie];B[if] ;W[je];B[hk];W[hi];B[ik];W[jk];B[hl];W[ij];B[im];W[jl];B[hm] ;W[jm];B[hn];W[jn];B[gm];W[fn];B[gk];W[cf];B[df];W[be];B[kg] ;W[qf];B[oe];W[nf];B[ki];W[jh];B[jf];W[ne];B[ke];W[kd];B[ji] ;W[kh];B[ih];W[lh];B[ii];W[hj];B[gr];W[li];B[hh];W[fj];B[fq] ;W[dg];B[eg];W[qc];B[cg];W[bg];B[ld];W[le];B[lf];W[kf];B[ec] ;W[eb];B[ke];W[jp];B[iq];W[kf];B[lj];W[mj];B[ke];W[gj];B[fp] ;W[kf];B[fb];W[hc];B[ke];W[me];B[jd];W[kf];B[gb];W[hb];B[ke] ;W[kc];B[lk];W[mk];B[ll];W[mm];B[kn];W[qo];B[dh];W[ch];B[qn] ;W[po];B[oo];W[on];B[op];W[ro];B[rn];W[rq];B[rl];W[qr];B[qj] ;W[ri];B[pr];W[so];B[sn];W[qq];B[rj];W[mq];B[om];W[nn];B[qh] ;W[rh];B[qg];W[qi];B[pi];W[rg];B[pf];W[pj];B[rf];W[qe];B[re] ;W[qd];B[oi];W[rd];B[si];W[se];B[pk];W[oj];B[ok];W[nj];B[ol] ;W[jj];B[jc];W[kf];B[bi];W[bh];B[ke];W[gc];B[lc];W[kf];B[db] ;W[da];B[ke];W[kb];B[lb];W[kf];B[ml];W[mg];B[nr];W[mr];B[np] ;W[mp];B[mo];W[lo];B[lp];W[mn];B[ms];W[os];B[or];W[ls];B[ps] ;W[qp];B[lr];W[ns];B[ms];W[ns];B[ks];W[qs];B[ms];W[mo])

Cornel Burzo 6d received 3 stones from Huang Yizhong 7p and lost by time.

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]HA[3]KM[0.5]TM[3600]OT[1x30 byo-yomi] GN[Demonstration game Shusaku-Cup 2010 board 2]PW[Huang Yizhong]PB[Cornel Burzo]WR[7p]BR[6d]DT[2010-03-25]EV[Demonstration game Shusaku-Cup 2010 board 2]PC[Tirgu Mures, Romania]AB[pd][dp][pp]RE[W+Time] ;W[dc] ;B[de] ;W[nq] ;B[cc] ;W[qn] ;B[oo] ;W[qq] ;B[dd] ;W[ec] ;B[cb] ;W[ic] ;B[mp] ;W[qp] ;B[mq] ;W[cn] ;B[fq] ;W[nc] (;B[qf] ;W[bp] ;B[cm] ;W[bm] ;B[bn] ;W[cl] ;B[dm] ;W[bo] ;B[dl] ;W[ck] ;B[dn] ;W[an] ;B[pb] ;W[kr] ;B[nr] ;W[hq] ;B[ql] ;W[ne] (;B[ir] ;W[hr] ;B[iq] ;W[ip] ;B[hp] ;W[jq] ;B[io] ;W[jp] ;B[gq] ;W[ho] ;B[gp] ;W[is] ;B[in] ;W[on] ;B[nn] ;W[om] ;B[gr] ;W[jr] (;B[ro] ;W[po] ;B[qo] ;W[pn] ;B[rn] ;W[op] ;B[no] ;W[or] ;B[lr] ;W[kn] ;B[ko] ;W[jo] ;B[jn] ;W[km] ;B[kp] ;W[ks] ;B[nm] ;W[ol] ;B[pq] ;W[pr] ;B[mk] ;W[nk] ;B[nl] ;W[mj] ;B[lk] ;W[qj] ;B[rp] ;W[rq] ;B[rj] ;W[rk] ;B[qk] ;W[rl] ;B[pj] ;W[qi] ;B[ri] ;W[qm] ;B[ok] ;W[rh] ;B[nj] ;W[qg] ;B[pi] ;W[qh] ;B[pf] ;W[ie] ;B[gc] ;W[ej] ;B[kc] ;W[ke] ;B[ch] ;W[dh] ;B[ci] ;W[dk] ;B[id] ;W[jd] ;B[ib] ;W[hb] ;B[hc] ;W[hd] ;B[jc] ;W[id] ;B[jb] ;W[df] ;B[ef] ;W[cf] ;B[eg] ;W[dg] ;B[eh] ;W[di] ;B[gb] ;W[fe] ;B[gg] ;W[jh] ;B[hf] ;W[gd] ;B[jg] ;W[kg] ;B[jf] ;W[kf] ;B[kh] ;W[ee] ;B[gj] ;W[be] ;B[fc]LB[md:A] ;W[ed] ;B[eb] ;W[gi] ;B[hi] ;W[hj] ;B[fi] ;W[gk] ;B[gh] ;W[cd] ;B[md] ;W[lh] ;B[ki] ;W[hn] ;B[im] ;W[hm] ;B[il] ;W[hl]) (;B[po] ;W[qm] ;B[qo] ;W[ro] ;B[rp])) (;B[pr] ;W[on] ;B[nn] ;W[om] ;B[qi])) (;B[co] ;W[qf] ;B[oe] ;W[qc] ;B[dn]))

Lucian Corlan 5d received 4 stones from Huang Yizhong 7p and lost by 2.5 points.

(;FF[4]GM[1]SZ[19]ST[2]CA[UTF-8]AP[SGFC:1.16] GN[Shusaku Cup 2010 7p demo] PB[Lucian Corlan] BR[5d] HA[4] PW[Huang Yizhong] WR[7p] KM[0.5] DT[2010-03-27] PC[Tirgu Mures, Romania] RE[W+2.5] TM[1800] OT[10/300 Canadian] RU[Japanese] AB[dd][pd][dp][pp];W[nq];B[qn];W[fq];B[hq];W[fo];B[cn];W[ip] ;B[eq];W[fr];B[kp];W[iq];B[mp];W[cf];B[fd];W[cl];B[di];W[ef] ;B[en];W[el];B[fn];W[fi];B[go];W[hd];B[ge];W[bd];B[jd];W[he] ;B[hf];W[if];B[gg];W[je];B[dg];W[df];B[fh];W[eh];B[ei];W[eg] ;B[hh];W[fj];B[dk];W[dl];B[ek];W[fk];B[fl];W[ck];B[ci];W[hj] ;B[jh];W[jj];B[ld];W[le];B[md];W[lh];B[ki];W[fm];B[ir];W[hr] ;B[jr];W[gp];B[ho];W[hp];B[hs];W[gq];B[gs];W[io];B[gl];W[gm] ;B[hm];W[hl];B[gn];W[gk];B[jn];W[in];B[im];W[ko];B[lp];W[jm] ;B[hn];W[km];B[ln];W[kn];B[li];W[mh];B[lk];W[qc];B[pc];W[qd] ;B[qf];W[rf];B[pq];W[qg];B[pf];W[rh];B[qk];W[pb];B[ob];W[qb] ;B[er];W[nb];B[nc];W[oa];B[mb];W[oc];B[od];W[jg];B[cc];W[bc] ;B[bb];W[ml];B[jp];W[jo];B[be];W[ce];B[cd];W[bf];B[ac];W[ae] ;B[kg];W[ih];B[re];W[qe];B[ig];W[hg];B[rg];W[sg];B[ig];W[jf] ;B[ii];W[kh];B[ji];W[me];B[ob];W[fs];B[bm];W[bl];B[es];W[db] ;B[cb];W[gc];B[id];W[ie];B[na];W[ec];B[ed];W[jq];B[kq];W[nn] ;B[np];W[rk];B[ql];W[rj];B[rl];W[lo];B[nf];W[ic];B[jc];W[ib] ;B[jb];W[ja];B[ka];W[ia];B[kd];W[fc];B[sk];W[sj];B[sl];W[pm] ;B[pn];W[om];B[on];W[no];B[mo];W[mn];B[oo];W[ok];B[qi];W[ri] ;B[qm];W[dn];B[do];W[dm];B[bo];W[gr];B[ol];W[nl];B[pl];W[nm] ;B[ll];W[lm];B[ke];W[kf];B[ne];W[mg];B[da];W[ea];B[ca];W[is] ;B[ks];W[pa];B[dc];W[eb];B[pg];W[qh];B[al];W[ak];B[am];W[fg] ;B[ff];W[gh];B[eo];W[fp];B[ij];W[jk];B[hi];W[ee];B[fe];W[mf] ;B[gi];W[ab];B[aa];W[qj];B[oj];W[pj];B[nk];W[pk];B[nj];W[oi] ;B[ph];W[pi];B[pe];W[mk];B[mj];W[og];B[of];W[ep];B[js];W[hs] ;B[ab];W[ad];B[ng];W[oh];B[il];W[ik];B[gj];W[hk];B[cm];W[jl] ;B[nh];W[ni];B[lj];W[mi];B[kj];W[kl];B[kk];W[fh];B[gd])

Artam Kachanovsky 6d received 3 stones from Huang Yizhong 7p and lost by resignation.

(;FF[4]GM[1]SZ[19]ST[2]CA[UTF-8]AP[SGFC:1.16] EV[SHUSAKU CUP 3] PB[Artam Kachanovsky] BR[6d] PW[Huang Yizhong] WR[7p] KM[0.5] DT[2010-03-26] PC[The KGS Go Server at] RE[W+R] TM[3600] OT[15/300 Canadian] RU[Japanese] ;AB[dd][pd][dp];W[qp];B[op];W[cf];B[fc];W[lp];B[pm];W[oo];B[no] ;W[on];B[pp];W[qn];B[qq];W[qo];B[pr];W[om];B[nn];W[qi];B[ip] ;W[cn];B[fp];W[dj];B[ko];W[nc];B[lc];W[pf];B[oc];W[nd];B[oe] ;W[ob];B[pb];W[od];B[pe];W[pc];B[qc];W[qf];B[of];W[ld];B[kc] ;W[mf];B[oh];W[pj];B[oj];W[ok];B[qh];W[rh];B[ph];W[rg];B[mj] ;W[nk];B[mh];W[gq];B[iq];W[gp];B[fo];W[ho];B[io];W[hn];B[fm] ;W[hl];B[fk];W[el];B[gm];W[hm];B[dm];W[cm];B[dl];W[bk];B[ll] ;W[mm];B[lm];W[hj];B[fi];W[hh];B[jg];W[je];B[jd];W[ie];B[hg] ;W[gh];B[di];W[ci];B[ej];W[dh];B[eh];W[dg];B[eg];W[id];B[gg] ;W[er];B[fq];W[fr];B[hr];W[gr];B[cq];W[ei];B[go];W[hp];B[di] ;W[dq];B[ic];W[hc];B[hb];W[ib];B[jc];W[gb];B[hd];W[gc];B[gd] ;W[fb];B[ke];W[fd];B[ge];W[ec];B[dr];W[eq];B[br];W[cp];B[bp] ;W[co];B[dk];W[ei];B[cs];W[jh];B[kg];W[fh];B[di];W[cj];B[ei] ;W[fg];B[ff];W[ef];B[ee];W[df];B[gk];W[fe];B[gf];W[kn];B[jm] ;W[jl];B[gj];W[ih];B[ig];W[km];B[jn];W[kl];B[ln];W[lo];B[kp] ;W[lq];B[il];W[ik];B[im];W[jo];B[jp];W[in];B[jo];W[jr];B[hk] ;W[jk];B[ir];W[kq])

Lucian Corlan 5d received 3 stones from Mok Jinseok 9p and lost by resignation.

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]KM[0.5]TM[1800]OT[3x30 byo-yomi] GN[SHUSAKU CUP 2009, Tirgu Mures, ROMANIA]PW[MOK JINSEOK]PB[LUCIAN CORLAN]WR[9p]BR[5d]DT[2009-03-29]RO[Handicap game]RE[W+R]PC[The KGS Go Server at] ;B[pd] ;W[] ;B[dd] ;W[] ;B[dp] ;W[pq] ;B[dj] ;W[fq] ;B[hq] ;W[fc] ;B[hc] ;W[ch] ;B[fd] ;W[cd] ;B[ce] ;W[cc] ;B[de] ;W[eb] ;B[gc] ;W[eh] ;B[fj] ;W[gh] ;B[hj] ;W[ih]LB[gd:A] ;B[if] ;W[ge] ;B[gd] ;W[cn] ;B[fp] ;W[gp] ;B[gq] ;W[cp] ;B[cq] ;W[ep] ;B[fo] ;W[dq] ;B[do] ;W[eo] ;B[en] ;W[eq] ;B[dn] ;W[fn] ;B[go] ;W[co] ;B[dl] ;W[cr] ;B[bq] ;W[br] ;B[fr] ;W[er] ;B[es] ;W[dr] ;B[cm] ;W[bm] ;B[bl] ;W[an] ;B[hp] ;W[ck] ;B[cl] ;W[nc] ;B[ld] ;W[ne] ;B[qf] ;W[pb] ;B[mc] ;W[md] ;B[lc] ;W[qc] ;B[nb] ;W[oc] ;B[qd] ;W[ob] ;B[qi] ;W[qo] ;B[nq] ;W[mp] ;B[pp] ;W[qp] ;B[pr] ;W[qq] ;B[np] ;W[mq] ;B[mr] ;W[lr] ;B[or] ;W[ms] ;B[nr] ;W[mo] ;B[on] ;W[qm] ;B[nm] ;W[lm] ;B[kh] ;W[fm] ;B[el] ;W[hn] ;B[jj] ;W[ik] ;B[ij] ;W[bk] ;B[kq] ;W[kp] ;B[jp] ;W[jo] ;B[ko] ;W[kn] ;B[lp] ;W[lo] ;B[lq] ;W[kp] ;B[jq] ;W[lk] (;B[di] ;W[dh] ;B[bj] ;W[bi] ;B[dc] ;W[db] ;B[bb] ;W[cb] ;B[be] ;W[ki] ;B[ji] ;W[jh] ;B[kj] ;W[ba] ;B[cj] ;W[jf] ;B[fg] ;W[ei] ;B[fh] ;W[ej] ;B[fk] ;W[aj] ;B[dk] ;W[al] ;B[kg] ;W[ie] ;B[ke] ;W[fi] ;B[gi] ;W[hi] ;B[gj] ;W[ef] ;B[gg] ;W[gf] ;B[eg] ;W[df] ;B[dg] ;W[cf] ;B[cg] ;W[bg] (;B[bf] ;W[hg] ;B[hh] ;W[kf] ;B[lf] ;W[gh] (;B[bp] ;W[ff] ;B[bo] ;W[gr] ;B[gs] ;W[fs] (;B[ac] ;W[ir] ;B[bc] ;W[ec] ;B[ed] ;W[gb] ;B[fa] ;W[hb] ;B[ib] ;W[bd] ;B[ad] ;W[ic] ;B[jb] ;W[jc] ;B[kc] ;W[hd] ;B[ca] ;W[fb] ;B[aa] ;W[ia] ;B[kb] ;W[ae] ;B[af] ;W[da] (;B[ba] ;W[ag]C[Black resigned.]) (;B[ga] ;W[ba] ;B[ja] ;W[ab] ;B[ae] ;W[ag] ;B[ha])) (;B[kl])) (;B[kl] ;W[ff] (;B[ll]) (;B[jm]))) (;B[ff] ;W[fe] ;B[hh] ;W[ee] ;B[bf])) (;B[dc]C[Black should first play here.] ;W[db] ;B[bb] ;W[cb] ;B[be] ;W[ba] ;B[di] ;W[dh] ;B[bi] ;W[ci] ;B[bh] ;W[cj] ;B[al]))

Ali Jabarin 5d received 4 stones from Mok Jinseok 9p and lost by resignation.

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]KM[0.5]TM[3600]OT[3x30 byo-yomi] GN[demonstration]PW[MOK JINSEOK]PB[ALI JABARIN]WR[9p]BR[5d]DT[2009-03-27]EV[SHUSAKU CUP 2009]PC[The KGS Go Server at]RE[W+Resign] ;B[pd] ;W[] ;B[dd] ;W[] ;B[pp] ;W[] ;B[dp] ;W[nq] ;B[qn] ;W[iq] ;B[gq] ;W[cn] ;B[cp] ;W[ck] ;B[go] ;W[cf] ;B[fc] ;W[qf] ;B[nd] ;W[pj] ;B[pr] ;W[lp] ;B[ci] ;W[bd] ;B[cc] ;W[de] ;B[cd] ;W[bc] ;B[bb] ;W[ed] ;B[db] ;W[ec] ;B[eb] ;W[fd] ;B[gc] ;W[ei] ;B[dj] ;W[el] ;B[dl] ;W[dk] ;B[ej] ;W[fi] ;B[ek] ;W[dm] ;B[fl] ;W[em] ;B[gk] ;W[lc] ;B[gd] ;W[ff] ;B[jc] ;W[oc] ;B[pc] ;W[nc] ;B[od] ;W[md] ;B[mb] ;W[mc] ;B[nf] ;W[rd] ;B[rc] ;W[qd] ;B[qc] ;W[jb] ;B[ib] ;W[pg] ;B[lb] ;W[kc] ;B[kb] ;W[jd] ;B[ic] ;W[kg] ;B[nh] ;W[mg] ;B[ng] ;W[gn] ;B[ho] ;W[hn] ;B[hf] ;W[ik] ;B[hj] ;W[hg] ;B[ij] ;W[ig] ;B[jk] ;W[io] ;B[rj] ;W[kj] ;B[kk] ;W[mj] ;B[lj] ;W[li] ;B[lk] ;W[qm] ;B[qk] ;W[pn] ;B[qo] ;W[pm] ;B[pk] ;W[oj] ;B[qi] ;W[pi] ;B[ph] ;W[qh] ;B[oh] ;W[rh] ;B[ok] ;W[nk] ;B[nl] ;W[mk] ;B[ml] ;W[mi] ;B[om] ;W[pe] ;B[ob] ;W[nb] ;B[pb] ;W[ll] ;B[im] ;W[lm] ;B[in] ;W[oo] ;B[mo] ;W[mm] ;B[on] ;W[po] ;B[lo] ;W[nn] ;B[no] ;W[ol] ;B[pl] ;W[rl] ;B[rk] ;W[op] ;B[kn] ;W[qq] (;B[rq] ;W[ri] ;B[mn] ;W[nm] ;B[ol] ;W[sj] ;B[km] ;W[sk] ;B[ln] ;W[qr] ;B[pq] ;W[rp] ;B[qp] ;W[rr] ;B[mq] ;W[mr] ;B[nr] ;W[lr] ;B[oq] ;W[np] ;B[mp] ;W[rn] ;B[ro] ;W[sp] ;B[sn] ;W[rm] ;B[jr] ;W[jq] ;B[kr] ;W[lq] ;B[kq] ;W[kp] ;B[ir] ;W[jp] (;B[be] ;W[gp] ;B[fo] ;W[hr] ;B[bo] ;W[bn] ;B[gr] ;W[hq] ;B[hs] ;W[fp] ;B[hp] ;W[eq]C[Black resigned]) (;B[hq] ;W[os] ;B[bo])) (;B[qr] ;W[rr] ;B[pq]))

Lucian Deaconu 5d received 3 stones from Kim Seung-Jun 9p and lost by 0.5 points.

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]KM[0.5]TM[1800]OT[3x30 byo-yomi] GN[SHUSAKU CUP 2009, ROMANIA]PW[KIM SEUNG-JUN]PB[LUCIAN DEACONU]WR[9p]BR[5d]DT[2009-03-28]RE[W+0.50] ;B[pd] ;W[] ;B[dd] ;W[] ;B[dp] ;W[pp] ;B[qn] ;W[np] ;B[pj] ;W[fq] ;B[cn] ;W[ip] ;B[jd] ;W[cf] ;B[ch] ;W[ef] ;B[fd] ;W[di] ;B[ce] ;W[bf] ;B[dh] ;W[eh] ;B[ei] ;W[ej] (;B[eg] ;W[fi] ;B[df] ;W[fg] ;B[dg] ;W[qf] ;B[qe] ;W[pf] ;B[nd] ;W[ql] ;B[ph] ;W[ol] ;B[ng] ;W[nj] ;B[kq] ;W[jq] ;B[jo] ;W[jp] ;B[qp] ;W[qq] ;B[po] ;W[rp] ;B[ro] ;W[qo] ;B[kp] ;W[ko] ;B[qp] ;W[oo] ;B[rq] ;W[qo] ;B[kn] ;W[lo] ;B[qp] ;W[ee] ;B[qo] ;W[de] ;B[cd] ;W[ci] ;B[bh] ;W[bi] ;B[ff] ;W[fe] ;B[ge] ;W[gf] ;B[ed] ;W[ff] ;B[pq] ;W[oq] ;B[op] ;W[he] ;B[or] ;W[pp] ;B[qr] ;W[cq] ;B[dq] ;W[cp] ;B[co] ;W[dr] ;B[er] ;W[cr] ;B[eq] ;W[fr] ;B[eo] ;W[fp] ;B[gn] ;W[fo] ;B[fn] ;W[dm] ;B[cm] ;W[dl] ;B[en] ;W[es] ;B[bk] ;W[bo] ;B[bn] ;W[bp] ;B[fl] ;W[gd] ;B[ln] ;W[mo] ;B[jn] ;W[nr] ;B[pm] ;W[qi] ;B[pi] ;W[qh] ;B[qj] ;W[rj] ;B[rk] ;W[si] ;B[rf] ;W[rg] ;B[re] ;W[qk] ;B[rl] ;W[rm] ;B[pl] ;W[sk] ;B[pk] ;W[qm] ;B[be] ;W[ai] ;B[gb] ;W[lc] ;B[nc] ;W[gc] ;B[fb] ;W[ic] ;B[jc] ;W[hb] ;B[jb] ;W[jf] ;B[ld] ;W[fc] ;B[ec] ;W[jk] ;B[hk] ;W[ho] ;B[jl] ;W[kl] ;B[il] ;W[os] ;B[op] ;W[pr] ;B[on] ;W[ji] ;B[hi] ;W[ih] ;B[af] ;W[ag] ;B[ae] ;W[ah] ;B[no] ;W[mp] ;B[dk] ;W[ek] ;B[cl] ;W[ke] ;B[kd] ;W[el] ;B[hh] ;W[hg] ;B[lk] ;W[lj] ;B[kk] ;W[kj] ;B[ll] ;W[oe] ;B[pg] ;W[qg] ;B[mj] ;W[mi] ;B[mk] ;W[od] ;B[oc] ;W[pe] ;B[qd] ;W[mg] ;B[mf] ;W[lg] ;B[ni] ;W[nh] ;B[oi] ;W[mn] ;B[mm] ;W[nn] ;B[nm] ;W[nf] ;B[ne] ;W[og] ;B[lf] ;W[kf] ;B[id] ;W[eb] ;B[db] ;W[hn] ;B[hm] ;W[oo] ;B[go] ;W[gp] ;B[no] ;W[gh] ;B[ie] ;W[if] ;B[fk] ;W[gj] ;B[hj] ;W[an] ;B[am] ;W[ao] ;B[ak] ;W[le] ;B[me] ;W[dj] ;B[ck] ;W[gk] ;B[gl] ;W[ga] ;B[ea] ;W[sf] ;B[se] ;W[sg] ;B[fj] ;W[gi] ;B[ii] ;W[jh] ;B[oo] ;W[qs] ;B[rs] ;W[ps] ;B[ib] ;W[hc] ;B[ia] ;W[ha] ;B[hd] ;W[em] ;B[in] ;W[fm] ;B[io] ;W[hp] ;B[gm] ;W[sn] ;B[so] ;W[ge] ;B[fa] ;W[sl] ;B[rn] ;W[dn] ;B[do] ;W[jj] ;B[ik] ;W[sm] ;B[je] ;W[oh] ;B[cj] ;W[bj] ;B[aj] ;W[ep]) (;B[fi] ;W[fh] ;B[dj] ;W[ci] ;B[cj] ;W[bi] ;B[ek] ;W[bj] ;B[fj]))

Lee Changho Defeated By An Amateur In BC Card Cup

Monday, January 18th, 2010

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.

Fujitsu Cup 2007

Sunday, April 15th, 2007
The International Fujitsu Cup 2007 started this weekend – and unfortunately everybody’s favorite “pro killer” amateurs – Fernando Aguilar and Jie Li – were eliminated in the first round. I wrote a few thoughts on their games – unfortunately none of them seem to have had any chance. Of the two, Aguilar’s game is by far the more exciting. Official matches between amateurs and professionals are unfair both ways: they are unfair for the amateur player, because the professional player has so much more experience and is playing Go for a living, but they are also unfair for the professional player because of the psychological pressure involved: there is nothing special if the amateur loses, actually that is 99% the expected result, while it’s such a painful outcome for the professional to lose…

From Novice to Expert

Friday, February 16th, 2007
Novice: Hey dude, so what’s better here, A or B? Expert: Hm,…, er,… C. Novice: What? Why??? Expert: Trust me. Novice: Year, right… What is this all about? It is about the Dreyfus Model, which lists stages in skills acquisition that apply to most domains – including Go, I believe. It explains, among other things, why professionals don’t seem able to explain to us the reason behind their moves, and why we shouldn’t be frustrated with this. I wrote an article on this.

North American Fujitsu Qualifier results

Monday, February 12th, 2007
Today was the final in the North American Fujitsu Qualifier – the tournament to decide who’s representing North America at the Fujitsu international Go championship. Jie Li, who is an amateur, defeated Mingjiu Jiang who is 7 dan pro. Jie Li has won many games against professionals – most recently a best-of-3 match against Feng Yun 9p – including victories in the past against Mingjiu, and against Jiang “Jujo” Zhujiu 9p (Mingjiu’s brother). In today’s final game, Jie Lie started by playing a calm, solid game, and strangely it was Mingjiu who seemed to try to push and complicate things, and got himself into trouble. Maybe the psychological pressure influenced Mingjiu’s game in a negative way – having lost to Jie Li before, and given that Jie Li has an amateur status, and that a pro isn’t supposed to lose against an amateur… The game was very exciting, a lot of fighting: a big group of Mingjiu’s died pretty early on, and he tried next to catch up by attacking several groups of Jie Li’s, but that didn’t work out well. First and second rounds of the Fujitsu Cup will be played at the Nihon Ki-in, on April 14th and 16th – looking forward for some exciting games. Go, Jie Li!