(;AB[bb]AB[cb]AB[cc]AB[dd]AB[de]AB[df]AB[ef]AB[fc]AB[fg]AB[gg]AB[hg]AW[ff]AW[eg]AW[dg]AW[fh]AW[gh]AW[cf]AW[ce]AW[cd]AW[ch]AW[bc]AW[bd]AW[ab]C[Please play the biggest endgame move.]AB[hh]AB[ic]AP[goproblems]
(;W[ba]
(;B[dc]C[Good job! Because of F14, black cannot block at C19.RIGHT])
(;B[ca]C[Black makes a mistake. How does white continue?];W[dc]
(;B[db];W[ec]C[Good job! Black cannot defend both sides. RIGHT])
(;B[ec];W[db];B[aa]
(;W[da];B[ac];W[ed]C[RIGHT])
(;W[ed];B[da]C[Not as large as it could be.]))))
(;W[aa];B[ba];W[dc];B[db];W[ec];B[ed];W[eb];B[fb];W[ea];B[fa])
(;W[ac];B[ba];W[dc];B[ec])
(;W[dc];B[ec]
(;W[db];B[eb];W[ba];B[da]C[Good job! RIGHT])
(;W[ba];B[db]C[RIGHT])))
