(;
AB[dd][fd][fe][ff][pd][nd][pp][qn][dp][dn][dj][fj][fh][eg][dg]
AW[ef][df][cg][cf][fg][gg][gh][qj][qf][nq][jp][fq]
TR[gh]
C[In this 4 stone handicap game, how should Black respond to the marked play?

Source:
    Correcting The Mistake, Kato Masao 9P
    Go World, #11, 1979, p. 60]
(;
B[fi]
C[In the game, Black thought that protecting here was necessary.];
W[di]
C[But now White has this forcing move.];
B[eh];W[cj]
C[Black has a dismal result.]
)
    (;
    B[gi]
    C[Another possibility, but Black's position is too thin.]
    (;
    W[eh]
    C[But White's atari here is a mistake.];
    B[dh];W[fi];B[ei]
    C[Black squeezes for an ideal result.]
    )
        (;
        W[ei]
        C[White exposes the weakness of Black's previous move.  Black cannot avoid a loss, while White connects.]
        (;
        B[eh];W[fi]
        )
            (;
            B[fi];W[eh]
            )
            (;
            B[di];W[dh]
            )
        )
    )
    (;
    B[dh]
    C[A strong and pragmatic way to protect the cut, but ...];
    W[bj]
    LB[ei:A]
    C[... after White slides here, Black still has to worry about White A later.]
    )
    (;
    B[ei]
    C[This move looks ordinary, but is correct.  Now the center and the left side are miai for Black.]
    (;
    W[bj]
    C[White can defend the left side, but ...];
    B[gi]
    C[... Black attacks the center with good shape.]
    )
        (;
        W[gi]
        C[White can strengthen the center, but ...];
        B[bh]
        C[... Black can attack the left side strongly here.]
        )
    )
)

