(;
AB[qc][rc][pd]
AW[nc][pc][qd][rd]
PL[W]
C[Black plays.];
C[Black plays.

As far as I can determine, this position doesn't appear in any pro game.  However, follow-ups in variations for both Black and White have the same not so obvious tesuji.]
(;
B[re]
C[An odd-looking, but a surprisingly effective contact play tesuji.

The following shows several options for White, but nothing seems satisfactory.]
(;
W[pe];B[od]
C[One possible sequence follows.];
W[qe];B[oc];W[ob];B[pb];W[ne];B[nd];W[md];B[mc];W[oe];B[nb];W[ld]
C[White builds a wall, but in gote.  Black's corner is maybe 15 points.]
)
    (;
    W[qe];B[pe]
    LB[oc:A]
    C[A painful forcing move.  Now if White saves the right side, Black's influence on the top will be much larger.

Instead, Black might even consider playing A first.];
    W[od]
    C[But if White saves the top, ...];
    B[qf]
    LB[pb:A]
    C[Black takes nice profit to project influence down the right side.

Later, playing A may be Black's privilege.]
    )
    (;
    W[od];B[pe];W[oe];B[pf]
    )
)
    (;
    B[pe]
    C[Another option, but ...]
    (;
    W[rb]
    C[... now White has the same nice contact tesuji!

Several options for Black follow.]
    (;
    B[oc];W[pb]
    (;
    B[ob];W[qb];B[nd]
    C[White has a strong group with territory in sente.]
    )
        (;
        B[re];W[qb];B[qe];W[sc];B[nd];W[ob];B[md];W[od]
        )
    )
        (;
        B[pb];W[oc];B[qb];W[qf];B[ra];W[pf]
        )
        (;
        B[qb];W[pb];B[ra]
        (;
        W[qf]
        C[Black still owes a move in the corner.]
        )
            (;
            W[sb]
            C[Depending on the outside, White can choose to kill the corner.];
            B[sc];W[qf]
            )
        )
    )
        (;
        W[qb]
        C[Inferior.];
        B[rb];W[pb];B[re]
        )
    )
    (;
    B[oc]
    C[Inferior.];
    W[pb];B[ob];W[od];B[pe];W[nb];B[oe];W[oa];B[re]
    C[White has a strong group in sente, and later can still use the aji of the 2 stones for useful forcing moves.]
    )
)

