How is this a draw and not checkmate?

What about brilliant moves?

Mate in 4, black to move. Was able to find this in a time scramble in 3 moves by accident

Nice brilliant move I found

"omg ultimate fork just as the prophecies fo-- oh. yeah, guess checkmate's cool too"

Black to move. Thought this was a neat trap. Can you find it?

Cutting it close

Why is this a blunder?

I thought I was creating a fork and forcing my opponent to surrender either their queen or bishop. Why is this considered a blunder?

What is this number represent. Asking for a friend.

Dude trying to scholar's mate me

Why Did My Opponent Resign? They Won...