(;AB[hr]AB[hq]AB[iq]AB[jq]AB[lq]AB[lr]AB[mr]AB[ms]AW[jr]AW[nr]AW[nq]AW[mq]AW[mp]AW[lp]AW[kp]AW[jp]AW[hp]AW[ip]AW[gp]AW[gq]AW[gr]C[Black to live]AP[goproblems]
(;B[ks];W[kq];B[kr];W[hs])
(;B[kr];W[is]
(;B[hs];W[ks]C[Black is dead])
(;B[ks];W[hs]C[Black is dead])
(;B[ir];W[ks]C[Ko]))
(;B[kq];W[is]
(;B[ks];W[hs])
(;B[hs];W[ks]C[Black is dead]))
(;B[is];W[kr];B[kq];W[ks]
(;B[js]C[Correct, Black makes Seki];W[gs];B[hs]C[RIGHT])
(;B[ir];W[js])
(;B[ls];W[js])
(;B[hs];W[js]))
(;B[js];W[is]
(;B[kq];W[ks])
(;B[ks];W[hs]
(;B[ir];W[kq])
(;B[kq];W[ir]))
(;B[kr];W[ks])
(;B[ir];W[ks])
(;B[hs];W[ks]))
(;B[ir];W[kr]
(;B[js];W[kq])
(;B[kq];W[ks]))
(;B[hs];W[kq]
(;B[kr];W[ks]C[Black can't live in Seki because of the cut])
(;B[ks];W[kr])
(;B[js];W[kr])))