Thanks for "bartTM" and "mr0661" to point me the vagueness of this problem
so this is 2nd version of it
(;AB[ik]AB[il]AB[jl]AB[jm]AB[jn]AB[in]AB[jo]AB[ko]AB[jp]AB[jq]AB[jr]AB[iq]AB[js]AB[hr]AB[gr]AB[hs]AB[mo]AB[mp]AB[mn]AB[mm]AB[nq]AB[or]AB[os]AB[pq]AB[qr]AB[qp]AB[qo]AB[qn]AB[po]AB[qm]AB[pm]AB[ql]AB[qk]AB[bs]AB[ar]AB[dr]AB[ds]AB[bq]AB[cq]AB[dp]AB[cp]AB[bp]AB[ap]AB[bo]AB[am]AB[bm]AB[cm]AB[cl]AB[bk]AW[ao]AW[an]AW[bn]AW[cn]AW[co]AW[dn]AW[dm]AW[dl]AW[dk]AW[ck]AW[ek]AW[kk]AW[jk]AW[kl]AW[km]AW[ln]AW[lo]AW[lp]AW[kq]AW[kr]AW[ls]AW[mr]AW[mq]AB[nr]AW[np]AW[op]AW[oq]AW[pp]AW[oo]AW[on]AW[om]AW[pn]AW[nl]AW[nk]AW[pl]AW[pk]AW[gk]AW[hl]AW[gm]AW[hm]AW[im]AW[hn]AW[gn]AW[io]AW[ip]AW[hq]AW[gq]AW[fq]AW[eq]AW[er]AW[es]AW[fs]AW[fr]AW[gs]AW[dq]AW[br]AW[eo]AW[fo]AB[ks]AB[kn]AW[ep]AW[kp]AW[ns]AW[ms]C[White 4 is a fatal mistake Black to kill and save 4 mark stones]AB[bj]AB[ci]AB[bi]AW[cj]AW[di]AW[gj]AW[fi]AB[hj]AB[hi]AB[gi]AB[ji]AB[jj]AW[kj]AW[ki]AW[li]AW[pj]AW[qi]AB[qj]AB[ri]TR[mm]TR[mn]TR[mp]TR[mo]LB[ks:1]LB[dq:2]LB[kn:3]LB[kp:4]AB[hk]AP[goproblems]
(;B[lm]C[That's it!RIGHT])
(;B[nm];W[lm])
(;B[ol];W[lm])
(;B[lq];W[lm];B[lr]C[Good but you can do better.])
(;B[lr];W[lm];B[lq]C[Good but you can do better.]))
