(;GM[1]FF[4]SZ[19]AP[SmartGo:2.5.0.0]CA[big5]
GN[S4_USA_CZE]
PW[Lukas Podpera (Czech)]
PB[Calvin Sun (US)]BR[7d]
EV[World Youth Go Championships]RO[4]
DT[July 2010]
PC[Taiwan]
KM[7.5]
RE[B by 17]
AN[Mingjiu Jiang]MU[1]
C[World Youth Go Championships, Round 4
July 25, 2010
W: Lukas Podpera (Czech)
B: Calvin Sun (US)
Commentary by Minjiu Jiang 7P
Published in the American Go E-Journal

If Kevin wins this game, he will be in the final, playing the Korean player. The White player defeated Andrew Huang of Canada and has been studying go in China, like many young European players. Mingjiu Jiang taught U.S. reps Calvin Sun and Kevin Fang, as well as Canada rep Andrew Huang. ]
;B[pd];W[dc];B[dq];W[qp];B[ce];W[do];B[dl];W[gp];B[eo];W[en];B[fo];W[dp]
;B[fq];W[cq];B[eq];W[fn];B[go];W[bp];B[kq]
C[joseki so far, no problem, all correct];W[di];B[ed];W[ec];B[fd];W[gc];B[fc]
;W[fb];B[cc]
(;W[dd]
C[I don't know this one, but maybe it's something he learned in China];B[de]
;W[gd];B[cd]
(;W[ge]
C[I don't like this, normally, White will jump to A]LB[gf:A];B[ff]
C[This is a good result for B]
(;W[kc]
C[This feels too close; if W wants to play on this side, should go all the way to A

]
LB[nc:A];B[gn]
C[good move!]
(;W[el]LB[dm:A]
C[this would be better at A];B[ek];W[fl];B[fk]
C[very good for B; this hurts the marked stone]TR[di];W[dk];B[dj];W[ck];B[cj]
;W[bl];B[bj];W[dm];B[ei]
C[this is a terrific result for B; W is too overconcentrated. I was very happy when I saw this, standing behind Kevin. ]
;W[oq];B[qg]
C[feels a little slow for B, a play at A would be better. ]LB[qj:A]
(;W[qc];B[qd];W[pc];B[oc];W[ob];B[nb];W[nc];B[od];W[mb];B[pb];W[na];B[qb]
C[this is good for B because now that B is strong, it's hard for W to play at A. And it's too early for W to play here; should have taken A first]
LB[qj:A];W[rc];B[rb];W[qj];B[pm]
C[perfect; B is so strong in the upper right that he can reduce white strongly]
;W[ko]
(;B[jo]
C[no good; too close to thickness; need to play at A and help the marked stone]
LB[mq:A]TR[pm]
(;W[lq]
C[good move; W is attacking the marked stone]TR[pm];B[kp];W[lp];B[lo]
C[I like this move; very strong];W[kn];B[lr]
C[also good];W[mr];B[kr];W[jn];B[in];W[io];B[jp];W[im];B[hn]
(;W[mm]LB[nk:A]
C[If W wants to gamble on the attack, must play more strongly at A];B[pk]
;W[pj];B[nk]
C[yes! Good; played very well.];W[qk]
C[it's hard for W to kill these stones];B[nm];W[ml];B[qo]
C[yes! now, American 7d is ok];W[po];B[qn];W[rp]
(;B[oj];W[oi];B[ql];W[qh];B[ni];W[oh];B[mo];W[np];B[nn]
C[W is weak and B has more territory; I don't think W has any more chance. Calvin played the Korean player next and lost. In the final round, he played the Korean player again and lost, and placed 4th. 

No further comments. ]
;W[kl];B[gb];W[hb];B[eb];W[ga];B[db];W[rg];B[qf];W[rf];B[re];W[nh];B[mi]
;W[gk];B[hl];W[gj];B[fi];W[ik];B[nl];W[gf];B[gi];W[lg];B[ph];W[ri];B[me]
;W[ne];B[nd];W[md];B[ld];W[mc];B[mf];W[nf];B[mg];W[mh];B[ng];W[og];B[of]
;W[le];B[oe];W[lf];B[lh];W[pg];B[kh];W[jf];B[il];W[jl];B[pf];W[pi];B[gl]
;W[mj];B[lj];W[mk];B[nj];W[kj];B[jj];W[ji];B[ki];W[ij];B[kk];W[jk];B[jg]
;W[hh];B[kf];W[ke];B[je];W[kd];B[if];W[jh];B[kg];W[gg];B[fg];W[ms];B[bk]
;W[cl];B[cr];W[br];B[dr];W[ro];B[rn];W[pa];B[rk];W[ra];B[sc];W[qa];B[rd]
;W[id];B[bs];W[ar];B[al];W[am];B[ak];W[bm];B[jd];W[jc];B[ie];W[he];B[ii]
;W[kj];B[ih];W[lk];B[jj];W[ji];B[se];W[rj];B[rl];W[no];B[mn];W[fe];B[ee]
;W[sf];B[gh];W[hg];B[mp];W[mq];B[pn];W[oo];B[ln];W[lm];B[ls];W[fj];B[ej]
;W[ep];B[fp];W[hi];B[li];W[on];B[hk];W[hj];B[ea];W[fa];B[fm];W[om];B[ol]
;W[ig];B[jh];W[jj];B[so];W[sp];B[sn];W[sk];B[sl];W[sj];B[gm];W[em];B[jf]
;W[jm];B[cs];W[hf];B[sb];W[oa];B[sa];W[hm];B[as])
(;B[ni]
C[better]))
(;W[nk]))
(;W[kp];B[jp];W[lq]
C[this is better for W]))
(;B[mq]))
(;W[qj];B[mq]
C[better here than in the upper right corner]))
(;W[dm]))
(;W[nc]
C[much better]))
(;W[gf]))
(;W[gd];B[dd];W[gf];B[cb]
C[also possible; normal]))

