(;
AB[mn][nn][lo][lp][lq][no]
AW[kn][ln][mo][mp][jp][pp][nq][qq]
C[Black plays.

Source:
    "Top Tesuji" (#2), poll from the "Weekly" go newspaper.]
(;
B[np]
C[A mistake.];
W[mq]
C[Now White repairs the weakness.];
B[oq];W[or];B[nr]
C[This desperate try to separate White's stones doesn't work.];
W[mr];B[pr];W[ns]
C[White can connect to the lower right stones.];
B[pq]
C[For example ...];
W[qr]
)
    (;
    B[oq]
    C[A very common tesuji that appears most often in unplayed variations!]
    (;
    W[or]
    C[At 1st glance, White seems to have his own counter-tesuji, but ...];
    B[nr]
    C[... Black has a counter-counter-tesuji.]
    (;
    W[mr];B[mq]
    C[Black sacrifices a stone (or two) to capture and connect.]
    )
        (;
        W[op];B[np]
        C[Again, Black sacrifices to connect.]
        )
    )
        (;
        W[mr];B[mq]
        C[Depending on the outside, Black has multiple options.  For example ...];
        W[np];B[nr];W[op];B[pr]
        )
    )
)

