(;SZ[19]AW[db]AW[bc]AW[dc]AW[cd]AW[dd]AW[df]AW[cg]AB[bb]AB[cb]AB[eb]AB[cc]AB[fc]AB[hc]LB[bb:2]LB[bc:1]C[a greedy black responded to white's push of 1 by blocking at 2. what should white do now?]AB[bi]AB[di]GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]RU[Japanese]KM[0.00]PW[White]PB[Black]PL[W]
(;W[ba]
(;B[bd]
(;W[ca];B[ac]
(;W[be]C[black diesRIGHT])
(;W[bf];B[be];W[ae];B[ce]C[black dies, but you've left unnecessary aji and liberties])
(;W[ae];B[be];W[bf];B[ce]C[black dies, but you've left unnecessary aji and liberties])
(;W[bg];B[ce]
(;W[de];B[bf])
(;W[bf];B[de]))
(;W[ab];B[aa]C[why play ko?])
(;W[cf];B[be])
(;W[aa];B[ab];W[da];B[be])
(;W[ce];B[be])
(;W[af];B[bf]))
(;W[ab];B[ac]
(;W[ca];B[aa]C[why play ko?])
(;W[be];B[ca]))
(;W[be];B[ca]
(;W[da];B[ac])
(;W[ad];B[da]C[black connects]))
(;W[ac];B[ad]
(;W[ca];B[ab]
(;W[bf]C[RIGHT])
(;W[af]C[black dies, but you've left unnecessary aji and liberties])
(;W[ce]C[black dies, but you've left unnecessary aji and liberties])
(;W[bg]C[black dies, but you've left unnecessary aji and liberties])
(;W[cf]C[black dies, but you've left unnecessary aji and liberties])
(;W[ag]C[black dies, but you've left unnecessary aji and liberties])
(;W[de]C[black dies, but you've left unnecessary aji and liberties])
(;W[be]C[RIGHT]))
(;W[be];B[da]
(;W[ab];B[aa])
(;W[ae];B[ca]))
(;W[ab];B[aa];W[ab];B[ca]))
(;W[da];B[ac]
(;W[ca];B[be];W[ab];B[aa]C[ko])
(;W[ab];B[aa]C[ko]))
(;W[ad];B[ac]))
(;B[da];W[ab]C[RIGHT]))
(;W[ab];B[bd]
(;W[ba];B[ac]
(;W[ca])
(;W[be];B[ca]))
(;W[ca];B[ac];W[ba];B[aa]C[why play ko?])
(;W[ac];B[ad])
(;W[da];B[ac])
(;W[be];B[ac]
(;W[ca];B[aa])
(;W[ba];B[ca])
(;W[ae];B[da])
(;W[da];B[aa])))
(;W[da];B[bd]
(;W[be];B[ac])
(;W[ca];B[ac];W[ba];B[be];W[ab];B[aa]C[ko])
(;W[ba];B[ac]
(;W[ca])
(;W[ab];B[aa]C[ko]))
(;W[ac];B[ad]
(;W[ca];B[ab];W[ba];B[bf]
(;W[be];B[ce]
(;W[cf];B[bg])
(;W[de];B[bg])
(;W[bg]))
(;W[bg]
(;B[af];W[be];B[cf];W[ce];B[dg])
(;B[ce]
(;W[de];B[af])
(;W[cf];B[de]
(;W[be];B[ee])
(;W[ee];B[be]
(;W[fd];B[af])
(;W[af];B[ed]))))))
(;W[ba];B[ab];W[ca];B[bf]
(;W[be];B[ce]
(;W[cf];B[bg])
(;W[de];B[bg])
(;W[bg]))
(;W[bg]
(;B[af];W[be];B[cf];W[ce];B[dg])
(;B[ce]
(;W[de];B[af])
(;W[cf];B[de]
(;W[be];B[ee])
(;W[ee];B[be]
(;W[fd];B[af])
(;W[af];B[ed]))))))
(;W[be];B[ab])))
(;W[ca];B[ba]
(;W[da];B[bd]
(;W[ac];B[ad]
(;W[ab];B[aa];W[ac];B[ag])
(;W[be];B[ab]))
(;W[be];B[ac])
(;W[ad];B[ac]))
(;W[bd];B[da])
(;W[ab];B[da]))
(;W[bd];B[da]C[letting black connect isn't so special])
(;W[be];B[da])
(;W[ac];B[da])
(;W[ec];B[bd]C[black can now choose to live in the corner])
(;W[gb];B[bd])
(;W[ad];B[da])
(;W[ea];B[bd]))
