(;
AB[na][nb][nc][nd][qa][ra][sa][pc][qc][rc][sc][od][pd][pe][qe][re][sf]
AW[ma][mb][mc][md][me][oa][ob][pb][qb][rb][sb][qd][rd][sd][ne][oe][of][pf][qf][rf][rg][sg]
C[What is the status of this famous position?

Source:
    From the yose volume of Gokyo Seimyo, a nearly 200 year old problem set.]
(;
B[se]
C[Capturing is a greedy mistake.]
(;
W[rd]
C[White is a move ahead in the capturing race.]
(;
B[oc];W[pa];B[ra];W[sd]
)
    (;
    B[sd];W[pa];B[ra];W[oc]
    )
)
    (;
    W[pa]
    C[Capturing back returns the favor to Black.];
    B[rd]
    C[Black lives in sente.]
    )
)
    (;
    W[se]
    C[White capturing is also a greedy mistake.];
    B[sf]
    C[Now Black is ahead a move in the capturing race, which the reader can verify.

So amazingly, neither side can make any progress from the initial position, whose status is a seki!

Furthermore, according to the AGA rules, neither side can claim any points of territory.]
    )
)

