(;SZ[19]EV[London Open]RO[5]DT[3/1/98]PC[London]PB[Luc Vannier

]BR[1 Dan]PW[Robin Upton]WR[1 Dan]HA[0]KM[6½]RE[W+R];B[dp];W[pd];B[dc];W[pp];B[ci];W[pj];B[nq];W[lq];B[qq];W[qp];B[pq];W[op];B[nr];W[mo];B[nc];W[nd];B[md];W[ne];B[oc];W[pc];B[jc];W[de];B[cd];W[ei];B[dk];W[mi];B[ji];W[me];B[ld];W[kf];B[ie];W[ig];B[jg];W[jf];B[if];W[hg];B[kg];W[lf];B[ih];W[hf];B[he];W[kd]L[kc]C[If black ignores this, white 'a' is painful.];B[kc];W[ge];B[hc];W[gd];B[gc];W[fg];B[qj];W[qi];B[ri];W[qk];B[rj];W[qh];B[rk];W[ql];B[rl];W[rh];B[ro];W[rp];B[qm];W[pm];B[pl];W[pk];B[pn];W[ol];B[rn];W[on];B[lr];W[po]C[White missed a trick here - see the variation pointe out by Caspar Nijhuis (5 Dan).](;B[qn]N[Slack];W[kq]C[White is content to let the marked stones struggle for life.]M[lr][nr][nq][pq][qq];B[fk];W[hj]C[White had used 55 minutes at this point, black 21 minutes.];B[ik];W[hk];B[li];W[lh];B[kh];W[lj];B[ki];W[il];B[mj];W[jk];B[kk];W[lk];B[mh];W[ni];B[kl];W[kj];B[jj];W[ij];B[lg];W[mf];B[oi];W[nj];B[mg];W[ii];B[og];W[pf];B[pg];W[qf];B[of];W[nh];B[mk];W[ll];B[ml];W[lm];B[oj];W[nk];B[oe];W[od]M[oe][og][of][pg][oi][oj][mj][mk][ml][kl][kk][jj][ji][ih][jg][kg][kh][ki][li][mh][mg][lg]C[The marked stones are captured. Black resigns. Time used: White - 75 minutes, Black - 37 minutes.])(;N[Better]AE[po];W[qn]C[Throwing in is tesuji here.]N[Tesuji];B[qo];W[po]C[Now black has no chance but to fill...];B[qn]L[sp]C[Now white 'a' is sente against the top group. This clearly does greater harm to the stones on the bottom.]))