This is a first line large knight's move connection. For this problem, the required diagonal move is .
The other diagonal at for the first line large knight's move connection does not work for this problem. can cut the connection.
If , then is an atari.
togo: And if on (following the connection tesuji), then on with no snapback coming to the rescue of the left bridgehead.
It's tempting to play on the point of symmetry with in the middle, but white can cut with here.