Learn How to Discover Check: Tactical Refutation
This middlegame puzzle is a classic example of a discovered check combined with a discovered attack. The key idea is that one piece can move with tempo, opening a line for another attacker while also creating a direct check on the king. In positions like this, king safety matters more than raw material count, so even a side that appears ahead can be punished if the king is exposed and pieces are loosely coordinated.