(;GM[1]FF[4]AP[Drago:2.10]SZ[9]AB[cg][cf][ce][ef][ee][ed][cc]AW[cd][bd][be][dc][cb][gc][fe][ff][eb][eg][dg];B[fg]C[obvious first move];W[gg];B[fh];W[gh];B[dh];W[eh]
;B[di]C[already less obvious]
(;W[ei];B[df];W[fi]
(;B[bi]C[the first really hard tesuji]
(;W[ah];B[bh];W[ag];B[dd];W[ch]
(;B[bg]C[or else ...];W[ci];B[bf];W[af];B[ai])
(;B[ci]
;W[bg]C[Black is dead]))
(;W[ch];B[bh];W[ag];B[bg];W[ah]
(;B[dd];W[ci];B[bf];W[af];B[ai];W[ae]
;B[bc]C[awakening at last the marked stone])
(;B[ci];W[dd];B[af]
;W[bf]C[Black is dead])))
(;B[bh];W[bi]
(;B[ch];W[ag]
(;B[ah];W[dd])
(;B[dd];W[ah]))
(;B[dd];W[ch];B[bf];W[ag];B[af];W[ah];B[bg];W[ci];B[ai];W[ah])))
(;W[fi]C[Black lives easily];B[bh]))