The King and Queen Checkmate

How To Checkmate A King With A King and Two Queens - Chess Simplified

Checkmate With Queen and King

Checkmate with one queen

Scholar's Mate in Chess (The 4-Move Checkmate) - Chessable Blog

King and Queen Checkmate : r/chessbeginners

Queen checkmate on king over white Stock Photo by ©razihusin 30242235

King and Queen Mate: Bingo Worksheet for kids

In this position, (black to move) Qe1 is apparently checkmate, but I am confused because the rook is pinned and therefore cannot defend the queen. Can someone explain this to me?

Checkmate - Vintage Chess Board Game King Queen Grandmaster Poster for Sale by Weardomss

endgame - How do you checkmate with a queen? - Chess Stack Exchange