(;AW[pd]AW[pc]AW[ob]AW[pe]AW[qe]AW[oe]AB[qd]AB[rd]AB[re]AB[qf]AB[qg]AB[qh]AB[qj]AB[oc]AB[nb]AB[mc]AB[kd]AB[id]AB[ic]AB[nf]AW[og]AW[pg]AW[pi]AW[ni]AW[hd]AW[hc]AW[ie]AW[fd]AW[fe]AW[ee]AW[dd]AW[dc]AW[bd]AB[de]AB[ce]AB[ed]AB[ge]AB[he]AB[gg]AB[jg]AB[eg]AB[dg]AB[fh]AB[ch]AW[cg]AW[bg]AB[bh]AB[di]AW[dh]AW[eh]AW[ei]AW[ci]AW[cj]AW[cl]AW[dm]AW[en]AW[ep]AW[fq]AW[er]AB[eq]AB[dq]AB[dr]AB[dp]AB[do]AB[dn]AB[co]AB[cm]AB[bn]AB[kq]AB[jo]AW[kp]AW[iq]AW[mq]AW[pq]AW[qo]C[White has a weak group in the upper right. Black has now invaded the lower side. Last move was A. How should black play here, to weaken the group in the upper right and win the game ? Please begin with B.]LB[kp:A]LB[jp:B]AP[goproblems];B[jp];W[jq];B[lp];W[ko];B[kn];W[lo];B[mo];W[ln];B[lm];W[mn];B[nn];W[mm];B[ml];W[nm];B[om];W[nl];B[nk];W[ol];B[pl];W[ok];B[oj];W[pk];B[pj];W[qk];B[rk];W[ql];B[rl];W[qm];B[nj];W[li];B[kj]C[Great ! A unfavorable ladder to weaken the white group. Takao Shinji captured the group and Cho Chikun resigned after move 135.RIGHT])