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

Completely winning position. The engine on my phone thinks I should move the bishop out of the way, and doesn't see the mate. : r/chess

Forced mate in one is forcedly preventable! : r/chess

Bad puzzles or tactic solutions - Chess Forums

How easy is mate in 1?

My month-long quest to become a chess master from scratch, by Max Deutsch

How Is This Mate In 1? ♖ Tough Chess LOGIC Puzzle ♖ Chess Logic Puzzle

Checkmate - Chess Terms

Stalemate: the long and the Short of it

White to move, is this a draw? Or a forced mate : r/chessbeginners