Checkmate Cool Chess Ninja Game King & Queen Gift

Achieving Checkmate w/ Only King & Queen

File:Checkmate of black king after anticipation of white queen

Chess: Can you checkmate with three queens against a lone king?

A Simple Guide To Checkmating The Lone King in Checkmate

Checkmate - Wikipedia

How to checkmate with a king and a bishop, how does the strategy

Chess Noob - Mating with a King and Rook

Chess Pieces Pawn King Queen Checkmate Strategy Gift Acrylic Print by Thomas Larch - Fine Art America

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?

Chess Pieces Pawn King Queen Checkmate Strategy Gift Greeting Card by Thomas Larch