Restless Knights
Anastasia's Mate
This checkmate got its name from the novel Anastasia und das Schachspiel by Johann Jakob Wilhelm Heinse (Wikipedia). The pattern is like you see on the diagram. A rook or a queen (more commonly a rook) delivers the mate on the a- or h-file (more commonly the h-file) and the knight is placed three squares horizontally from the mated king. A pawn on the g-file (or b-file if it's a queenside mate) blocks the king's escape as well. Often comes after a sacrificial combination.
Tips for using the board below: If you tap the f3-square, that'll take you to the next game. C3 will take you back to the previous one. If you tap e7, that will flip the board. Note that once you've flipped the board, the functions don't flip, so e7 becomes d2, f3 becomes c6 and c3 becomes f6. Many more squares have functions, I'll let you discover them for yourself if you want to.