(;
AB[gb][cc][fc][hc][cd][gd][ge][bf][cf][ff][ag][fg][bh][eh][bi][di][cj][ej]
AW[fa][db][fb][dc][dd][de][fe][df][bg][cg][dg][ch][dh][ci]
PL[W]
C[White plays.

Source:
    From Susuki Tamejiro 8p's tsumego book from 1920.];
W[ae]
(;
B[ad]
C[Mistake.];
W[bd];B[ce];W[ac];B[af];W[cb];B[bc];W[bb]
C[White lives.]
)
    (;
    B[be]C[Correct defense.];W[cb];B[bb];W[bc]
    (;
    B[bd];W[ab];B[ba];W[ec];B[ca];W[da];B[ac];W[fd];B[ee];W[gc]
    C[Ko]
    )
        (;
        B[ac];W[ec];B[ee]
        C[Black eliminates the ko from the previous line, but ...];
        W[ca];B[ea];W[ab];B[aa];W[ba];B[bd]
        C[... now White has a ko on the left side.];
        W[af]
        C[For example ...];
        B[ad];W[af];B[ae];W[ab]
        )
    )
)

