apex64 Coach
Double Check
What it is
A double check is a discovered check where both the moving piece and the unmasked piece give check simultaneously. Since you cannot block two lines or capture two pieces in one move, the king is absolutely forced to move.
When to use it
Use it to break through defenses that a single check could not — a double check ignores captures, blocks, and even nearby defenders, making it the backbone of the most famous mates.
How to use it
Line up a piece behind another that can move to give its own check. When you move the front piece with check, both attackers strike at once — hunt for double checks especially when setting up a forced king walk or smothered mate.
Worked examples
Watch the coach play the tactic from real master games.