(;
AB[qd][oc][ic][qj][oj][ej][cj]
AW[cd][ed][ch][ql][qp][op]
C[White to play to reduce the upper right corner.

Source
    American Go Journal Vol. 18, No. 2, 1984, pp. 25-26.
    Keshi and Uchikomi, Kaoru Iwamoto.]
(;
W[oe]
C[Normally this point is key to the defense or attack of Black's upper right corner.];
B[pe];W[nc];B[pc]
C[But with Black's outside strength, White's position becomes uncomfortable.  Black's right side is strengthened, and White's stones lack a base and will be subject to constant attack.]
)
    (;
    W[rd]
    C[A good practical idea to challenge Black's framework.

The variations are endless, but the following gives one possibility of reasonable play for both sides.]
    (;
    B[qe];W[nh];B[ph];W[qc]
    C[When the timing is right, White can live in the corner.]
    (;
    B[pc];W[qb];B[re];W[sc]
    )
        (;
        B[rb]
        C[Trying to kill White is unreasonable and dangerous.];
        W[rc];B[qb];W[pc]
        C[And White either captures the 2 stones in the corner, or runs out into to the center to cause havoc.]
        )
    )
        (;
        B[re]
        C[If Black tries to hold White with this hane ...];
        W[qe]
        C[White immediately cuts.  This cut and the following moves are a common technique worth remembering.];
        B[rc];W[pd];B[qc];W[rf];B[sd];W[og];B[qf];W[qg];B[pe]
        LB[pf:a][mg:b]
        C[And after a play at either A or B, White can be satisfied with the erasure.  Given Black's initial overwhelming influence, White has a flexible shape and Black's is somewhat heavy.]
        )
    )
)

