(;
AB[kq][hr][hq][gq][fq][fp][ep][dp][cp][cq][bq][bo][ar]
AW[br][cr][dq][eq][fr][gr][ir][iq][ip][io][bn][co][dn][cm][fn][go]
TR[kq]
C[White plays.

Source:
    Korean life and death pamphlet.

Side variations analysis:
    Myron Souris]
(;
W[es]
C[Fails, and reading out the sequence should be quick and easy for most players.];
B[dr];W[er];B[bs];W[ds];B[gs]
C[Black wins the semeai.]
)
    (;
    W[ds]
    C[Fails.  Black has another easy defense.];
    B[er];W[dr];B[gs];W[es];B[bs]
    )
    (;
    W[hs]
    C[This most obvious attack ... fails!

White seems to connect out and prevent Black from doing the same, but ...];
    B[gs]
    C[... Black now has several easy-to-read forcing moves.];
    W[fs];B[dr];W[er];B[ds];W[bs];B[ao]
    C[A beautiful move.  Black makes an eye on the left side, and White has a painful liberty shortage along the bottom.];
    W[is]
    C[White tries to quickly make all the connections before giving atari, but ...];
    B[aq];W[gs];B[as]
    C[... White is a move too late.  Black lives!]
    )
    (;
    W[er]
    C[The only move that works!]
    (;
    B[ds];W[gs];B[es];W[hs]
    C[White can no longer make 2 eyes just on the bottom left edge, so White must connect out here, but ...];
    B[dr]
    C[... now with a liberty shortage, White cannot capture these 3 stones!];
    W[bs]
    C[This move only seems to delay the inevitable capture of White's corner stones.]
    (;
    B[aq];W[ao]
    C[Finally, White's ingenious plan is clear.  Black's capture of the 3 stones make only 1 eye.  Black dies.]
    )
        (;
        B[ao]
        C[Making an eye on the left side is too slow.];
        W[is]
        C[White can capture the 3 stones now.  Black dies.]
        )
    )
        (;
        B[is]
        C[This hane looks like a good forcing move, but ...];
        W[gs]
        C[... White is now alive in the corner without having to connect out.  In addition, Black's group cannot connect out.  Play out the following sequence.];
        B[hs];W[jr];B[ds];W[es];B[bs];W[dr]
        C[Black collapses.]
        )
    )
    (;
    W[dr]
    C[This connection seems similar to the previous correct variation, but this move is a mistake!];
    B[is]
    C[Now, unlike the previous variation, Black does have a forcing move here.];
    W[jr];B[es]
    C[White's eye-shape is bad.  White has only 1 eye, and Black wins the semeai.]
    )
    (;
    W[gs]
    C[This move also looks similar to the correct variation, but the move is bad timing.];
    B[er];W[dr];B[es]
    (;
    W[hs]
    C[White doesn't have time to connect out.];
    B[bs]
    C[Black captures the 5 stones.]
    )
        (;
        W[ds];B[hs];W[fs];B[bs]
        C[Again, White has only 1 eye, and Black wins the semeai.]
        )
    )
)

