(;AB[jc]AB[jd]AB[je]AW[ie]AW[id]AW[ic]AW[ib]AW[jb]AB[kb]AW[ka]C[Black to block white and protect its territory.]AB[kf]AB[lf]AB[mf]AB[of]AB[od]AB[oe]AB[nf]AP[goproblems]
(;B[lb];W[la]
(;B[ma];W[ja]
(;B[mb]C[RIGHT])
(;B[mc]C[RIGHT])
(;B[nb]C[RIGHT]))
(;B[nb];W[ma]))
(;B[la];W[lb];B[ja];W[kc]C[ko.]))