(;AB[db]AB[dc]AB[cd]AB[bd]AB[ad]AB[ba]AW[be]AW[ce]AW[de]AW[ee]AW[ed]AW[ec]AW[eb]AW[gb]AW[ca]AW[cb]AW[ab]AB[dd]AW[bg]C[Try to read it out first.]AP[goproblems]
(;B[bb];W[bc]
(;B[cc];W[aa]
(;B[ac]
(;W[da]
(;B[bb]TR[ab]TR[aa]MA[ba]C[White can't save the marked stones because of a shortage of liberties.RIGHT]MA[ea])
(;B[ea];W[ae])
(;B[ae];W[af])
(;B[ba];W[ae]))
(;W[bb]
(;B[da]C[Simple.RIGHT])
(;B[ae];W[af])))
(;B[da];W[ae]
(;B[ac];W[ea])
(;B[bb];W[ba]MA[ac]C[Black can't push.])
(;B[ba];W[bb])
(;B[ea]C[White plays tenuki, knowing the Black stones are dead anyway.]))
(;B[bb];W[ba]
(;B[ac];W[da])
(;B[da];W[ae]MA[ac]C[Black cannot push.])
(;B[ae];W[bg]))
(;B[ba];W[da])
(;B[ae];W[da]
(;B[bb];W[af]
(;B[ac];W[bc])
(;B[ea];W[ac]))
(;B[ac]))
(;B[ea];W[ae]))
(;B[ac];W[aa]
(;B[cc]
(;W[da]
(;B[bb]TR[ab]TR[aa]MA[ba]C[White can't save the marked stones because of a shortage of liberties.RIGHT]MA[ea])
(;B[ea];W[ae])
(;B[ae];W[af])
(;B[ba];W[ae]))
(;W[bb]
(;B[da]C[Simple.RIGHT])
(;B[ae];W[af])))
(;B[da];W[ea]
(;B[cc];W[ae])
(;B[bb];W[ba]C[Black can't push.]MA[cc])
(;B[ba];W[bb])
(;B[ae];W[af]))
(;B[bb];W[ba]
(;B[da];W[ae]MA[cc]C[Black cannot push.])
(;B[cc];W[da]))
(;B[ba];W[bb]
(;B[da];W[ae])
(;B[cc];W[ae]))
(;B[ae];W[da]))
(;B[da];W[aa]
(;B[ac];W[ea]
(;B[cc];W[ae])
(;B[bb];W[ba]C[Black can't push.]MA[cc])
(;B[ba];W[bb])
(;B[ae];W[af]))
(;B[cc];W[ae]
(;B[ac];W[ea])
(;B[bb];W[ba]MA[ac]C[Black can't push.])
(;B[ba];W[bb])
(;B[ea]C[White plays tenuki, knowing the Black stones are dead anyway.]))
(;B[bb];W[ba]
(;B[cc];W[ae]MA[ac]C[Black cannot push.])
(;B[ac];W[ae]MA[cc]C[Black cannot push.]))
(;B[ba];W[bb]
(;B[cc];W[ea])
(;B[ac];W[ae])))
(;B[ae];W[da]
(;B[ac];W[af]
(;B[aa];W[ab])
(;B[cc];W[bc])
(;B[ea];W[cc]))
(;B[cc];W[aa]
(;B[bb];W[af]
(;B[ac];W[bc])
(;B[ea];W[ac]))
(;B[ac];W[af]))))
(;B[da];W[bb]
(;B[ac];W[ae]
(;B[bc];W[ea])
(;B[cc];W[ea]))
(;B[bc];W[ea]
(;B[ac];W[ae])
(;B[cc];W[ae]))
(;B[cc];W[ae]
(;B[bc];W[ea])
(;B[ac];W[ea]))
(;B[ea];W[fa]C[One eye against none.]))
(;B[bc];W[da]C[Black can get only one eye.])
(;B[cc];W[bb]
(;B[da];W[ea]
(;B[bc];W[ae])
(;B[ac];W[ae]))
(;B[bc];W[da])
(;B[ac];W[da])
(;B[ea];W[da])
(;B[ae];W[da]))
(;B[ac];W[da]
(;B[bb];W[cc])
(;B[cc];W[bb]))
(;B[aa];W[da])
(;B[ea];W[bb]
(;B[fa];W[da])
(;B[da];W[fa]C[One eye against none.])
(;B[ac];W[da])
(;B[bc];W[da])
(;B[cc];W[da])
(;B[ae];W[da]))
(;B[ae];W[af]
(;B[bb];W[bc]
(;B[ac];W[da]
(;B[aa];W[ab])
(;B[cc];W[bc])
(;B[ea];W[cc]))
(;B[cc];W[aa]
(;B[da];W[ea])
(;B[ac];W[da])
(;B[bb];W[da]
(;B[ac];W[bc])
(;B[ea];W[ac])))
(;B[da];W[aa]
(;B[bb];W[ea])
(;B[cc];W[ea])
(;B[ac];W[ea])))
(;B[da];W[bb])
(;B[bc];W[bb])
(;B[cc];W[bb])
(;B[ac];W[bb])
(;B[ea];W[bb]
(;B[ac];W[da])
(;B[bc];W[da])
(;B[cc];W[da])
(;B[da];W[fa])
(;B[fa];W[da]))
(;B[aa];W[da])))