My first mistakeless chess match!

Cool M2 i found in a Game today

White resigned. Moral victory, forfeit or 700 elo blunder?

Can you find the next best move for black?

Accused me of cheating because I played fast in a bullet game

HOW my move is mistake and how I move c6?

Why is it oversight?

What about it?

I ended up taking rook and Queen

How is Bb4 not a brilliant move but an inaccuracy?

What about it?

A great would also be fine but inaccurate really?

Why is taking the knight with queen the best move?

Mate at the edge of the board i did today.

A Brilliant move?

What about it?

This is my first brilliant move. I’ve played casually for a while but only recently started really getting into chess. I’m confused as to why a long castle would warrant a brilliant?