(;AW[qd]AW[qc]AB[pd]AB[pc]AB[oc]AB[ob]AB[nb]AB[mb]AB[mc]AW[nc]AW[nd]AW[od]AW[pe]AW[pf]AB[oe]AB[ne]AB[me]AW[md]AW[ld]AW[lc]AW[lb]AB[ng]C[black should try to make his stones alive]AP[goproblems]
(;B[qb];W[rb]
(;B[pa];W[ra]
(;B[qa];W[ma];B[na]C[RIGHT])
(;B[qe];W[qa])
(;B[ma];W[qa])
(;B[na];W[qa];B[qe];W[re];B[rd];W[rc];B[qf];W[pg]))
(;B[qa];W[ma]
(;B[na];W[pa])
(;B[pa];W[na]))
(;B[ma];W[pa]
(;B[oa];W[qa];B[pb];W[ra];B[rc];W[rd];B[qe];W[sc])
(;B[qa];W[oa])
(;B[ra];W[rd]
(;B[sb];W[rc]
(;B[qa];W[oa])
(;B[oa];W[qa]))
(;B[qa];W[oa])
(;B[oa];W[qa];B[pb];W[qa])))
(;B[oa];W[qa])
(;B[na];W[pa])
(;B[ra];W[sc]
(;B[pa]C[RIGHT])
(;B[ma];W[pa]
(;B[qa];W[oa])
(;B[oa];W[qa])
(;B[sb];W[sa]))
(;B[sb];W[sa]))
(;B[rc];W[rd]
(;B[ra];W[sc];B[pa]C[RIGHT])
(;B[sc];W[qa];B[pb];W[sd])
(;B[pa]C[RIGHT]))
(;B[sb];W[qa])
(;B[qe];W[qa]))
(;B[ma];W[qb])
(;B[oa];W[qb])
(;B[pa];W[qb])
(;B[na];W[qb])
(;B[qe];W[qb]C[black can't catch these stones])
(;B[pb];W[qb])
(;B[rb];W[qb])
(;B[qa];W[qb]))