The Smothered Mate or Philidor's Legacy typically occur with the opponent King on h8 or a8 surrounded by pieces and the White Knight delivering mate on f7 and g6 or c7 and b6.
Here are some games.
https://www.chessgames.com/perl/chessgame?gid=1521254
https://www.chessgames.com/perl/chessgame?gid=1383799
https://www.chessgames.com/perl/chessgame?gid=1551419
On the other hand, there are some games where the mate occured at the middle of the board.
https://www.chessgames.com/perl/chessgame?gid=1243016
https://www.chessgames.com/perl/chessgame?gid=1243092
Now time for some puzzles. I'm sure you can easily solve these.
Godoy - Castro, 2004 Black to move and win
Yagupov - Krusnullin, 1999 White to move and win
Thanks for reading and have fun with chess!
