What does 'mate in one' mean in chess? Apparently, I've done it

What does 'mate in one' mean in chess? Apparently, I've done it many times since my buddy keeps telling me it's my favorite checkmate move? - Quora

Ultimate Chess Glossary & Chess Terms (+300) - Alberto Chueca - High Performance Chess Academy

What does 'mate in one' mean in chess? Apparently, I've done it many times since my buddy keeps telling me it's my favorite checkmate move? - Quora

In this position, black to move resigned. Easy puzzle: why did he resign? Hard puzzle: what winning move could he have played instead of resigning? : r/chess

Decision making in critical positions - Chess Forums

Why is this a draw by timeout vs insufficient material? I literally have forced mate in 1, clearly my material is sufficient. : r/chess

How the heck am I supposed to mate in 2? It's too hard for me but yet again I'm 834 so .. : r/chess

Kay County Chess Club

Checkmates - Basics, Rules and Types of Popular Checkmates

What is the difference between a stalemate and a draw in Chess? - Quora

DRAW - Why?? - Chess Forums

Can my opponent Castle me into Checkmate? - Quora

Checkmate - Wikipedia