(;AB[bc]AB[cb]AB[dc]AB[ec]AB[eb]AB[fb]AW[ga]AW[gb]AW[fc]AW[ed]AW[gd]AW[dd]AW[cd]AW[cc]AW[bd]AP[goproblems]
(;B[ac];W[da]
(;B[db];W[fa]
(;B[ea];W[bb];B[ca];W[ba])
(;B[ba];W[ea]))
(;B[ba];W[ea];B[ab];W[ca]))
(;B[da];W[fa]
(;B[ea];W[bb])
(;B[ac]
(;W[ba];B[bb];W[ea];B[aa]C[B can lose less stones ])
(;W[ea]C[];B[ba];W[db];B[ab];W[ca]C[]))
(;B[ba];W[ac];B[ab];W[bb]C[]))
(;B[fa];W[da]
(;B[ca];W[bb])
(;B[ba];W[ac];B[ab];W[bb]C[])
(;B[ab];W[db]
(;B[ba]C[Black can make life losing less stones than five])
(;B[ca]))
(;B[bb];W[db]))
(;B[bb];W[ea];B[da];W[fa];B[db])
(;B[ea];W[bb])
(;B[ba];W[ac];B[ab];W[bb]C[])
(;B[ab]
(;W[ba]
(;B[da];W[fa];B[ea];W[ca])
(;B[bb];W[ea];B[da];W[fa])
(;B[fa];W[bb]
(;B[da]C[RIGHT])
(;B[ca];W[ac];B[da]C[RIGHT])))
(;W[da];B[ba])))