Possible brillint move?

Why this isn’t labelled as brilliant but only great?

It’s WTP, mate in one from Polgar’s puzzle book. How did black even get into this position? I can’t think of any legal move that preceded this.

I know it’s just a puzzle to make you see the mate, but I sometimes like to imagine what preceded it, so I can learn to recognise the necessary setup

Another Don't resign post. He got greedy wanting 3 queens on the board

After 3 months of nonstop playing, I finally beat Antonio!

This my friends is why you don’t need 4 queens! #Stalemate

Help understanding

I've recently started playing and I see that no matter what, the first thing most people do is taking the knights with the bishop. I understand that it may be helpful to create double pawns to ruin the pawn structure but sometimes people do it regardless of whether there would be a double pawn or not. I'm the 600-800 ELO range now. Is this just beginner's anxiety to get the knights off the board, or am I missing a broader tactic? It was my understanding that bishops and knights had similar value depending on whether you're playing an open or closed position.

I can believe in divine action.

My opponent robbed me of the chance to play my first ever smothered mate

Got this position recently, white to play and win

This was a 24h daily game

The Best Checkmate Notation - the GG move

Was losing by 7 when opponent just basically let me line up this inescapable checkmate