(;AB[ii]AB[ij]AW[jj]AB[kk]AW[li]AW[lj]AW[lk]AB[mh]AB[mi]AB[mj]AB[mk]AB[ml]AW[ll]AB[mm]AB[lm]AB[lh]AB[kh]AB[ik]AB[jk]AB[ih]AW[kl]AW[jg]AW[hl]AW[gm]AW[fn]AW[lo]AW[kp]AW[jq]AB[gs]AW[ds]AW[cs]AW[bs]AW[as]AW[ar]AB[br]AB[cr]AW[aq]TR[jj]C[Black to capture the marked stone.]AP[goproblems]
(;B[kj];W[ji]
(;B[jh];W[ki]
(;B[jl];W[km];B[kn];W[jm];B[im];W[jn];B[jo];W[in];B[hn];W[io];B[ip];W[ho];B[go];W[hp];B[hq];W[gp];B[fp];W[gq]
(;B[gr];W[fq];B[eq];W[fr]
(;B[fs];W[er];B[dr];W[es];B[bq];W[ap];B[bp];W[ao];B[bo];W[an];B[bn];W[am];B[bm];W[al];B[bl];W[ak];B[bk];W[aj];B[bj];W[ai];B[bi];W[ah];B[bh];W[ag];B[bg];W[af];B[bf];W[ae];B[be];W[ad];B[bd];W[ac];B[bc];W[ab];B[bb]
(;W[il]
(;B[aa]C[RIGHT])
(;B[ba];W[hm]))
(;W[hm]
(;B[aa]C[RIGHT])
(;B[ba]
(;W[il])
(;W[gn])))
(;W[gn]
(;B[aa]C[RIGHT])
(;B[ba]
(;W[hm])
(;W[fo])))
(;W[fo]
(;B[aa]C[RIGHT])
(;B[ba]
(;W[gn])
(;W[ep])))
(;W[ep]
(;B[aa]C[RIGHT])
(;B[ba]
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(;W[dq])))
(;W[ln]
(;B[aa]C[RIGHT])
(;B[ba];W[ko]))
(;W[ko]
(;B[aa]C[RIGHT])
(;B[ba]
(;W[ln])
(;W[jp])))
(;W[jp]
(;B[aa]C[RIGHT])
(;B[ba]
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(;W[iq])))
(;W[iq]
(;B[aa]C[RIGHT])
(;B[ba]
(;W[jp])
(;W[hr])))
(;W[hr]
(;B[aa]C[RIGHT])
(;B[ba]
(;W[iq])
(;W[hs]))))
(;B[er];W[fs];B[es]C[RIGHT]))
(;B[fq];W[gr];B[hr];W[fr];B[er];W[fs];B[es]C[RIGHT]))
(;B[jm]C[RIGHT]))
(;B[ki];W[jh]))
(;B[jm]C[RIGHT]))