(;
AB[ra][qb][pb][pc][pd][qe][qf][rf][pf][qi][qh][rj]
AW[rb][sb][qc][qd][re][se][sf][ob][nc][nd][pe][oe][oh][ng][pj][ql][rl]
C[Black plays.

Source:
    Go World, #38, p. 52
    Tesuji problem,  Kanagawa Masaaki 6p]
(;
B[sg]
C[Slack.  Black fails to use the aji of the corner stones.];
W[rd];B[sc];W[qa];B[pa];W[oa];B[rh]
C[Black lives in gote with only 3 points of territory.  All of Black's corner stones have gone to waste.]
)
    (;
    B[qa]
    C[Correct];
    W[rg]
    (;
    B[sh]
    (;
    W[oc]
    C[Best];
    B[sa];W[od];B[rd];W[pa];B[sg]
    C[Black lives while capturing some stones.  This line of play is best for both sides.]
    )
        (;
        W[sg]
        C[Inferior];
        B[sa];W[rc];B[sd];W[oc];B[rh];W[od];B[qg]
        C[Black captures some stones while living.]
        )
    )
        (;
        B[rh]
        C[Too slow.];
        W[rd];B[sc];W[oc];B[qg];W[od];B[sg]
        C[Black has to live small and in gote.  Black's corner stones have been no help.]
        )
    )
)

