(;
AB[np][pp][pq][kq][qr][rr]
AW[oo][po][qo][dp][fq][iq][qq][rq]
C[Black plays.
Go World #22, p. 55
"Forcing Moves", Sakai Masanori 4p, James Davies]
(;
W[mq]
C[If Black tenukis, Black better have a good reason to allow White's invasion here.];
B[mp];W[lq];B[lp];W[kr]
C[White connects out and Black loses territory and eye space.]
)
    (;
    B[ko]
    C[Black can defend the invasion with this jump.  However, Black ends in gote with little effect on White's position.]
    )
    (;
    B[jq]
    C[Black's bump is a good defensive forcing move to remember.];
    W[ip]
    PL[W]
    C[White will probably stand up here.];
    W[mq]
    C[But now White's invasion doesn't work.];
    B[mp];W[lq];B[lp]
    )
)

