Outside at Knight: This is One Tricky Knight Sudoku!

Today's Puzzle:

We've had a run of fantastic Knight Sudoku's recently, and this one would certainly be amongst the best of them!

Link to Play:

Outside at Knight by FullDeck and Missing a Few Cards https://tinyurl.com/SudokuSleuthOutsideAtKnight

Rules:

Normal sudoku rules apply.

Cells a chess knight's move apart must contain different digits.

Digits outside the grid must appear in one of the first three cells of the row or column from the position of the clue.