(;
KM[6.50]
TM[1800]
DT[2015-12-22]
PC[The KGS Go Server at http://www.gokgs.com/]
PW[Li ZhuoLiang (Hong Kong)]
PB[Eric Lui (USA)]
C[KPMC 2015:  Eric Lui on Li ZhuoLiang v Lui
White:  Li ZhuoLiang (Hong Kong)
Black:  Eric Lui (USA)
Commentary:  Eric Lui
Published in the December 23, 2015 edition of the American Go E-Journal

In this 5th (of 6) round game of the 2015 Korean World Amateur Championships (KPMC) against Li ZhuoLiang from Hong Kong, Eric Lui walks us through his thinking process at key points.   After staying calm during a big unclear middle game fight, Eric emerges with an attack on Li's weak group.  Eric then converts the attack into a territorial advantage to coast to a win.];
B[pd]
C[Each game you chose for color.  This game is Eric's 5th as Black, but his first san ren sei.];
W[dd];B[pp];W[dq];B[pj];W[nq];B[do]
C[This tenuki is common.];
W[qn];B[on]
C[This move is probably not joseki.  A two space pincer would be joseki.  Black is trying to do something the opponent does not know.];
W[qq]
C[Simple response.]
(;
B[qp]
C[Black must block on this side.];
W[pq];B[op]
C[Blocking is correct.]
(;
W[oq]
(;
B[jd]
C[Building a moyo.];
W[fc]
LB[hc:A][qc:B][qf:C]
C[White's response is very interesting - slow and solid.  White is playing solid against Black's potential, and he has a plan.

Normal would be A.  Other moves would be B directly or C.]
(;
B[fp]
C[Now Black switches to the bottom left.]
(;
W[nc];B[oc];W[nd];B[pf];W[ld]
TR[fc]
C[White's plan - the marked stone is in a good place.]
(;
B[gd]
C[See the variation.];
W[gc];B[kf];W[mg];B[og];W[jc];B[ic];W[je]
C[Very sharp play and a very aggressive plan.  Black did not see it coming.];
B[ke];W[id];B[kd];W[kc];B[hd];W[ie];B[hc]
C[A risky fight for both sides now.];
W[jg]
C[A very complicated fight.];
B[lg];W[gf];B[fd];W[ed];B[ff];W[fg];B[ee];W[eg];B[de];W[cd];B[ce]
(;
W[oe]
C[With this move White is concerned with settling his own group first before attacking Black.];
B[dh]
C[Black doesn't respond, because this move feels more urgent.];
W[pe];B[qe];W[qd];B[qc];W[rd];B[rc];W[od];B[pc];W[qf];B[re];W[pg]
(;
B[jf]
LB[of:A]
C[The variation shows what will happen if Black connects at A instead.];
W[rf];B[sd]
(;
W[ph]
C[A difficult move for White to make.  See the variation.];
B[mh];W[nh];B[mf];W[oh];B[ng];W[nf]
(;
B[mj]
C[Too greedy.  See the variation.];
W[if];B[bd];W[bc];B[be]
C[Sente.  See the variation.]
(;
W[cb];B[fi];W[ge];B[fe];W[ii];B[ik];W[kj];B[kk];W[hk]
C[White uses a good technique to escape.];
B[hl];W[gk];B[gi]
C[Black hits the vital point, which is painful for White.];
W[hi];B[ek];W[il];B[jk];W[ij];B[hm];W[gh];B[hg];W[ig];B[ki]
LB[lj:A]
C[This move protects the weakness at A.];
W[el];B[dl];W[ej];B[ei];W[dj];B[fj];W[fk];B[dk];W[cj];B[ch];W[fm];B[em];W[en];B[fl];W[gl];B[dn];W[hn];B[im];W[gm];B[in];W[ho];B[io];W[fo];B[eo];W[fn];B[eq];W[gp];B[er]
LB[dr:A][nc:B][gd:C][oe:D]
C[Playing A is better, because this game move leaves bad aji that White takes advantage of later.  In any event, Black's attack here is very successful and builds an unshakable lead.

Overall, the opening was interesting.  Playing B was White's idea to try to take the initiative.

Playing C is questionable, and the following sequence left a defect in Black's shape that White immediately took advantage of.

The fight became complicated and risky for both, but D was wishful thinking.  White's gain on the right was relatively small, and caused him to fall behind overall.

End of commentary.];
W[om];B[nm];W[ol];B[ql];W[oj];B[pn];W[bo];B[bn];W[lk];B[lj];W[cm];B[dm];W[cn];B[co];W[bm];B[bp];W[an];B[bk];W[ck];B[cl];W[bl];B[bj];W[bq];B[rq];W[rr];B[hp];W[ip];B[hq];W[jj];B[ll];W[mk];B[nk];W[ml];B[nl];W[mm];B[km];W[lm];B[kn];W[mo];B[nj];W[go];B[lq];W[np];B[rp];W[ok];B[no];W[lp];B[kq];W[mn];B[nn];W[mr];B[cp];W[ap];B[sr];W[rs];B[he];W[hf];B[qj];W[pi];B[rh];W[nb];B[ob];W[me];B[gq];W[dr];B[cq];W[br];B[cr];W[bs];B[cs];W[kg];B[lf];W[js];B[jr];W[ks];B[ls];W[lr];B[kr];W[ms];B[is];W[bi];B[ci];W[aj];B[di];W[ak];B[bh];W[ri];B[qi];W[qh];B[rj];W[of];B[kh];W[sh];B[si];W[sg];B[rg]
C[White resigns.]
)
    (;
    W[fj];B[db];W[eb];B[bb];W[cb];B[ca];W[dc];B[cc]
    C[A large ko.]
    )
)
    (;
    B[if]
    C[Correct.];
    W[pl]
    C[White can strike at Black's weakness, but ...];
    B[ol]
    C[... Black can play lightly here.  Black is better.]
    )
)
    (;
    W[if]
    C[White save these stones, but ...];
    B[ig];W[hg];B[ih];W[hh];B[ii];W[hi];B[ij];W[gk];B[of]
    C[... connecting here is a problem for White.]
    )
)
    (;
    B[of];W[oh];B[ph];W[nf];B[qg];W[ng];B[rf];W[kg]
    C[White captures 4 key stones.]
    )
)
    (;
    W[cg]
    C[I expected this play.];
    B[bd];W[bc];B[bf];W[ad];B[ae]
    C[Black may use this ko to settle the group, but I think White should play like this anyway.];
    W[be];B[gg];W[gh];B[bd]
    )
)
    (;
    B[jf]
    LB[mg:A]
    C[This move may be proper, but White can then play A to move toward the center.  I'm not satisfied with this result.]
    )
)
    (;
    W[co];B[cn];W[cp];B[dn];W[cj];B[pf]
    C[Black expected this result, which might be ideal for Black.]
    )
)
    (;
    B[pf]
    C[If Black defends the moyo, ...];
    W[cm]
    C[... White will pincer.]
    )
)
    (;
    B[fp]
    C[My other choice - forcing White low at the bottom.]
    )
)
    (;
    W[rp]
    C[If White plays here, ...];
    B[oq]
    C[... Black pushes in for a good result.];
    W[or]
    (;
    B[nr]
    C[This outside cut gives Black sente, which is good for Black.

White has a choice now:  to take the stone or to connect.
If White connects, the result is similar to the variation, in which Black cuts on the inside.];
    W[mr]
    C[If White takes the stone, ...];
    B[rq];W[qr];B[ro]
    C[... Black has a nice result locally.]
    )
        (;
        B[pr]
        C[If Black cuts on the inside, ...];
        W[qr];B[nr];W[ps];B[ro];W[rq];B[qo];W[mq]
        C[... this expected result is locally good for White, but Black takes sente.]
        )
    )
    (;
    W[rq]
    C[White can also descend, but ...];
    B[rp]
    LB[lq:A]
    C[... Black will respond here to have forcing moves around A.]
    )
)
    (;
    B[pq];W[qp];B[po]
    TR[on]
    C[The marked stone is inefficient.]
    )
)

