(;
AB[mc][qc][pd][ce][de][dh][cl][do][dp][eo][np][kq][pq][qr][rr]
AW[dc][cd][ed][rd][qf][ph][qk][po][ep][fp][qp][qq][cq][dq][iq]
C[Black plays.

Source:
    "Amateur Kyu Game"
    American Go Yearbook 2003, pp. 56-57
    James Kerwin 1P]
(;
B[qm]
C[This invasion is not big now.  But the following moves are instructive.

The upper side is bigger.  See the variation.];
W[pl]
LB[pm:A]
C[The game move, but A is preferable in this case.];
B[pm];W[om]
(;
B[on]
C[The game move, but a mistake.];
W[pn];B[ol];W[nm]
(;
B[ql]
C[Another mistake.];
W[pk];B[rk];W[rj];B[nn];W[rn]
C[Black's invasion has turned into a huge loss.]
)
    (;
    B[ro]
    C[Black can still scrape by with this slide.]
    (;
    W[rp];B[rm];W[oo];B[rk];W[ok];B[rj]
    )
        (;
        W[no];B[rl];W[rk];B[rp]
        )
    )
)
    (;
    B[rk]
    C[Black must start with this attachment.];
    W[rj];B[on]
    C[Now this hane works.];
    W[pn];B[rl];W[qj];B[ro];W[rp];B[rn]
    (;
    W[oo]
    (;
    B[sm]
    C[Black lives.]
    )
        (;
        B[nn]
        C[Black is not strong enough to endure an all out fight by extending here.]
        )
    )
        (;
        W[so]
        C[White does not have enough liberties to try to kill with this hane.]
        )
    )
)
    (;
    B[gc]
    C[For example, playing here is bigger and would put great pressure on White's top left corner.]
    )
)

