(;SZ[19]AW[cd]AW[cc]AW[dc]AW[de]AW[cg]AW[dq]AW[po]AW[qn]AW[pm]AW[qi]AW[oi]AB[qd]AB[oc]AB[ce]AB[dd]AB[ed]AB[do]AB[nq]AB[pq]AB[qp]AB[qo]AB[qg]C[Is it possible to capture the white stone in a ladder at A? If not, please play at B.FORCE]LB[df:A]LB[jd:B]TR[de]FF[4]GM[1]AP[Jago:Version 4.35]GN[goproblem1521] (;B[df];W[ee];B[fe];W[ef];B[eg] (;W[ff];B[gf];W[fg];B[fh];W[gg];B[hg];W[gh];B[gi];W[hh];B[ih];W[hi];B[hj];W[ii];B[ji];W[ij];B[ik];W[jj];B[kj];W[jk];B[jl];W[kk];B[lk];W[kl];B[km];W[ll];B[ml];W[lm];B[ln];W[mm];B[nm];W[mn];B[mo];W[nn];B[on];W[no] (;B[oo];W[np] (;B[mp];W[op] (;B[pp]C[The ladder works.RIGHT]) (;B[oq]C[The ladder works.RIGHT])) (;B[op];W[mp])) (;B[np];W[oo])) (;W[mn]AB[gf]AB[hg]AB[ih]AB[ji]AB[kj]AB[lk]AB[ml]AB[fh]AB[gi]AB[hj]AB[ik]AB[jl]AB[km]AB[ln]AW[ff]AW[fg]AW[gg]AW[gh]AW[hh]AW[hi]AW[ii]AW[ij]AW[jj]AW[jk]AW[kk]AW[kl]AW[ll]AW[lm]AW[mm]AB[nm]C[CHOICE];B[mo];W[nn];B[on];W[no] (;B[oo];W[np] (;B[mp];W[op] (;B[pp]C[The ladder works.RIGHT]) (;B[oq]C[The ladder works.RIGHT])) (;B[op];W[mp])) (;B[np];W[oo]))) (;B[jd]C[Sorry, but the ladder works.]))