(;AB[qd]AW[fd]AB[dn]AW[pp]AB[od]AW[ce]AB[eq]AW[bn]AB[bp]AW[ck]AB[qn]AW[nq]AB[pj]AB[nc]AW[ne]AB[ld]AW[jd]AB[lf]AW[oc]AW[nd]AB[oe]AW[mc]AB[nb]AW[nf]AB[lc]AW[qe]AB[qf]AW[re]AB[pf]AW[pc]AB[mb]AW[pd]AB[pe]AW[rd]AB[rf]C[In the game white played S18. But if he play Tennuki at A, kill the corner.]AW[nj]LB[nj:A]AP[goproblems]
(;B[qb];W[qc];B[rb];W[pb]
(;B[pa];W[oa];B[qa];W[ob];B[rc];W[sc]
(;B[na];W[qd]
(;B[se]C[RIGHT]))
(;B[sb]C[RIGHT])
(;B[sa]C[RIGHT])))
(;B[qc];W[qb];B[rc];W[sc];B[rb];W[sb];B[pb];W[ra])
(;B[rc];W[qc]
(;B[se];W[rb];B[sd];W[sc])
(;B[rb];W[qb]
(;B[sd];W[se]
(;B[sc];W[ra])
(;B[sb];W[ra];B[sf];W[sc]C[Only ko]))
(;B[se];W[sd];B[sf];W[sb])))
(;B[pb];W[qb];B[rb];W[qa]
(;B[ob];W[qc])
(;B[rc];W[qc];B[ob];W[ra];B[se];W[sc])))