(;GM[1]FF[4]SZ[19]AP[SmartGo:2.8.3.0]
PW[Benjamin Teuber (Germany)]WR[6d]
PB[Chen Cheng-Hsun (Taipei)]BR[7d]
EV[2012 WAGC]RO[6]
DT[20120515 [15:17]
KM[6.5]
RE[B+R]
US[Chris Garlock]
AN[Yang Shuang 3P]
C[2012 WAGC
Round 6
W: Benjamin Teuber (Germany)
B: Chen Cheng-Hsun (Taipei) 
Commentary by Yang Shuang 3P
Transcribed by Chris Garlock]
;B[qd];W[dp];B[pq];W[dc];B[nc];W[po];B[qo];W[qn];B[qp];W[pm];B[nq];W[qi]
;B[qg];W[ce];B[ql];W[rm];B[pj];W[rk];B[rl]
(;W[qk]
C[shd be at A; Benjamin told me he just forgot to play the joseki move ]
LB[sl:A];B[pl];W[pk];B[ol];W[sl];B[ok];W[pi]
C[now white is not alive and black A is sente]LB[om:A];B[oj];W[pg];B[qj]
;W[rj];B[rh];W[ri];B[nh];W[op];B[oq];W[ro];B[nn];W[pf];B[qe]
C[white has to run and his group is really thin ];W[nf];B[oh];W[ph];B[fq]
;W[fp];B[ep];W[eo];B[eq]
(;W[do]LB[dq:A]
C[A is a choice; leads to a fight (see var)];B[dq]
(;W[gp]
C[better at A]LB[cq:A];B[cq]
C[black gets the big point];W[mj]
C[overplay. white is attacking a thick white wall; and white's own rightside group is thin and not safe. he's probably trying to protect the cut at A but this is one-sided thinking. because of the weakness of the white group I like jumping simply at B instead.]
LB[fo:A][lf:B];B[lh];W[oi];B[ni];W[nj]
(;B[kj]
C[better at A; see var]LB[ml:A];W[ml];B[om]
C[wrong direction for a fight];W[kk]TR[mo]
C[black has some weak points around the marked point];B[jk];W[kl];B[jl];W[jm]
;B[jj]
(;W[np]LB[mo:A]
C[A works too]
(;B[mp]
C[the jump at A is better]LB[ln:A];W[mo];B[no]
(;W[pn]LB[pp:A]
C[last losing move; must play at A, threatening black's corner];B[lo];W[mn]
;B[mm];W[ln];B[lm];W[kn];B[km]
C[white resigns after B77. 

see 78 on for continuation variations. white can create a seki in the center...]
;W[jn];B[lp]
(;W[nm];B[nl];W[ll];B[nm]
C[no seki; black has an extra liberty at A. white dies in the center and his rightside group is also not alive]
LB[qm:A])
(;W[ll];B[nm];W[mk];B[lj];W[qm];B[mi];W[on];B[lk];W[oo]
C[seki locally, but the rightside white group is not definitely alive...]
))
(;W[pp]
C[lots of options from here; see variations];B[lo]
(;W[mn];B[mm];W[ln];B[lm];W[kn];B[km];W[jn];B[lp];W[ll];B[nm]
(;W[lj];B[mk];W[nk];B[nl];W[lk];B[mi];W[on])
(;W[mk];B[lj];W[qm];B[mi];W[on];B[lk]))
(;W[qq];B[km];W[kn];B[lm];W[mm];B[mn];W[ln])))
(;B[ln]))
(;W[mo];B[mn];W[lo]TR[kj]
C[this shows why the marked stone was an overplay];B[no];W[np];B[mp];W[pp]
C[b center dies]))
(;B[ml];W[kj];B[jh]
C[keeps pressure on right-side white group]))
(;W[cq]
C[important point and big]))
(;W[dq];B[do];W[co];B[dn];W[fo];B[cn];W[bo]))
(;W[sl];B[rj];W[qj];B[qk];W[sk];B[pi];W[ri];B[qh];W[rh];B[rg];W[ol]
C[joseki; black tenukis now]))

