I did not find this basic shape using pattern search... Hope its not duplicate. Comments welcome.
(;AP[goproblems]AB[ls]AB[lr]AB[lq]AB[jq]AB[kq]AB[iq]AB[hr]AW[gr]AW[gq]AW[gp]AW[hp]AW[ip]AW[jp]AW[kp]AW[lp]AW[mp]AW[mq]AW[mr]AW[ms]AW[jr]C[Black to life his group](;B[is]C[Ouch ... ])(;B[ks]C[Ouch...])(;B[ir];W[hs];B[js];W[kr])(;B[kr];W[js])(;B[hs];W[js])(;B[js];W[is](;B[ks];W[hs])(;B[ir];W[ks](;B[hs];W[js])(;B[kr];W[js]))(;B[kr];W[ks]C[Ko. The best black can get.RIGHT])(;B[hs];W[ks])))