Playing a game as black. I see a brilliant tactic which actually is a blunder. My queen is hanging on f2. Perfect. Fortunately my opponent didn’t see it. Neither did I to be fair. I also didn’t see that their queen is also hanging. Neither did my opponent. So queens stayed on the board. I did win the game and didn’t see this until the game review.

Board vision is wonderful thing when you actually look at the board in its entirety.