Dirty chess trick every good player should know (from a Magnus game)

Hey ... I thought he played the only winning move in that game! After all, black is a piece up and white can't have many choices.

Yes, White did find the move in game. But according to Stockfish, White could have played c5 in that position (not this one) and it would be smth like +8.0. Since you cannot put more solutions into chess.com puzzles, I decided to shift two pawns to make c5 impossible. (It was also maybe bullet instead of blitz).

This was the actual position from game where c5 is also winning. The idea is somehow that the bishop is under attack and if it moves away, you can play c6. If Bxc5, you eventually win queen by discovery attack. So Qxc5 is best response but still losing.

That's very neat of you!