(;SZ[3]AB[ab]AB[cb]C[White to play and live.]AP[goproblems]
(;W[bb]
(;B[ba];W[bc]C[Neither side can play A1 or C1. All stones are alive in seki. Both sides pass now.RIGHT]MA[ac]MA[cc])
(;B[bc];W[ba]C[Neither side can play A3 or C3. All stones are alive in seki. Both sides pass now.RIGHT]MA[aa]MA[ca]))
(;W[ba];B[bb])
(;W[bc];B[bb]))