Position adapted from a game between high dans on KGS. Thanks to Lok for the final version of the problem, and to all for adding new variations !
(;AB[ds]AW[es]AW[fs]AW[fr]AW[fq]AW[fp]AB[ep]AB[eq]AB[er]AB[dp]AB[dn]AW[eo]AW[en]AW[gn]AW[hn]AW[in]AW[jn]AW[kn]AW[ko]AW[kp]AW[lp]AW[jq]AW[iq]AW[ir]AW[hs]AB[is]AB[js]AB[jr]AB[kr]AB[kq]AB[lq]AB[mp]AB[lo]AB[ln]AB[lm]AB[km]AB[jm]AB[gm]AB[hm]AB[im]AB[jp]C[Black to kill.]AB[hr]AB[fo]AW[fn]AW[gs]AB[fm]AB[em]AB[dm]AB[do]AB[dr]AB[mo]AB[mr]AP[goproblems]
(;B[ip];W[hq]
(;B[hp];W[gr]
(;B[gp];W[go];B[gq]C[Correct !RIGHT])
(;B[go];W[gp];B[ho]C[Only seki, but you were close..]))
(;B[gq];W[hp];B[gp]C[RIGHT]))
(;B[hp];W[ip];B[hq];W[jo]
(;B[ho];W[go];B[io];W[jp];B[gp];W[fo]C[Seki.])
(;B[go];W[ho];B[gp]C[Seki.]))
(;B[hq];W[ip];B[hp];W[jo]
(;B[ho];W[go];B[io];W[jp];B[gp];W[fo]C[Seki.])
(;B[go];W[ho];B[gp]C[Seki.])))