(;
AB[eb][fb][dc][dd][ed][ce][cf][bf]
AW[cb][cc][cd][db][ec][fc][bd][be][id]
C[Black plays.

Source:
Go World #28, pp. 49-50, Summer 1982
"Basic Fighting Techniques"
Miyazawa Goro]
(;
B[gc]
C[Black has some forcing moves, but will this plan be helpful?];
W[fd];B[fe];W[gd];B[hd];W[ge];B[he];W[gf]
C[Running out of forcing moves, Black is left with 2 weak groups.];
B[hc]
C[Black can save the stones at the top, but ...];
W[de];B[ee];W[ef];B[df];W[ff]
C[... White's squeeze makes Black's plan a failure.]
)
    (;
    B[fd]
    TR[eb][fb]
    C[Sacrificing the marked stones is the correct idea, but this sequence doesn't work well.];
    W[gc];B[gd];W[hc]
    C[Black just helps White seal off the top area.]
    )
    (;
    B[gd]
    C[Correct sacrifice tesuji.];
    W[gc]
    C[White must save the 2 stones, but ...];
    B[hc]
    C[... now Black has this magnificent forcing sequence.];
    W[gb];B[hb];W[ea];B[fd];W[fa];B[hd]
    TR[id]
    C[Black creates massive thickness that dominates the top.  And now White's marked stone has little use.]
    )
)

