(;AB[rl]AB[ql]AB[pj]AB[oi]AB[oh]AB[og]AB[ng]AB[mh]AB[kh]AB[lh]AW[rj]AW[qh]AW[rf]AW[qe]AW[pf]AW[of]AW[nf]AW[mg]AW[lf]AB[nj]AW[nh]AW[ni]AW[mi]AW[mj]AW[nk]AB[mk]AW[rn]AW[pn]AW[oo]AW[nn]AW[mn]AW[lm]AB[qj]AB[pi]TR[mj]TR[mi]TR[ni]TR[nh]C[Capturing the marked stones would make you very strong in the center.]AP[goproblems]
(;B[lj];W[oj]
(;B[li]
(;W[nj];B[nl]C[RIGHT])
(;W[ok];B[nj]C[RIGHT]))
(;B[ok];W[nl]
(;B[nj]C[Just ko])
(;B[li];W[nj]))
(;B[nl];W[ml]
(;B[ok];W[lk])
(;B[lk];W[ol]
(;B[li]C[RIGHT])
(;B[ok];W[pk]
(;B[li];W[qk]TR[rl]TR[ql]C[No need to lose those stones.])
(;B[qk];W[nm]))
(;B[nm]
(;W[ok])
(;W[om]
(;B[li]C[RIGHT])
(;B[ok];W[pk]
(;B[qk];W[mm])
(;B[li];W[qk]TR[ql]TR[rl]C[No need to lose those stones.])))))))
(;B[li];W[lj])
(;B[oj];W[lk];B[ml];W[kj]C[White is safe.])
(;B[ok];W[lk]
(;B[nl];W[kj]C[White is safe.])
(;B[ml];W[kj]C[White is safe.]))
(;B[nl];W[lk]
(;B[ml];W[kj]C[White is safe.])
(;B[ok];W[kj]C[White is safe.])
(;B[lj];W[ml])))