rules - Why is this a checkmate? - Chess Stack Exchange

I'm new to chess and I'm confused about a puzzle I was practicing. As you can see my black queen has put the white king in check, but I'm confused how this is possible if a rook is right next to my

If I'm up two pawns, should I trade the other pieces and go for

Bughouse chess - Wikipedia

chess - Checkmate all the kings #3 - Puzzling Stack Exchange

Scholastic Chess Club Part 3: Check Checkmate and Stalemate

I'm slaughtering the chess opponent near the end, and they call it

rules - Why is this a checkmate? - Chess Stack Exchange

How can white checkmate black in this chess puzzle? - Board & Card

Was promoting to knight the correct play here? : r/chessbeginners

From a lichess tactic I got wrong White to play and win. : r/chess