(;
AB[ki][kj][kk][lj][jh][jl][hh][hl][hj][gj]
AW[jj][ji][ii][jk][ik]
C[White plays.]
(;
W[hk]
C[At first glance, Black seems very thin, and White seems only to have to push through to find a double atari to capture a surrounding stone.];
B[gl];W[hi];B[gh]
C[Black is careful not to allow an easy double atari.];
W[il]
C[But now White has a long sequence of forcing moves.];
B[im];W[jm];B[kl];W[hm];B[in];W[gk];B[fk];W[fl];B[gm];W[fj];B[ek];W[gi]
C[White seems to have an escape by finally capturing 2 surrounding stones, but ...];
B[fi];W[ej];B[ih];W[ij];B[gj]
C[... White's ataris come to an end.  White dies in a snapback.]
)
    (;
    W[fj]
    C[As usual in such problems, the symmetrical move is the solution.];
    B[ih];W[il];B[im];W[jm];B[kl];W[hm];B[in];W[hk];B[gl];W[gk];B[fk];W[fl]
    C[With this double atari, White finally escapes.]
    )
)

