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About Double Check

A double check is the most forcing move in chess. By giving check with two pieces simultaneously — typically a discovered check where the moving piece also checks — you leave the enemy king no choice but to move, because no single block or capture can stop two checks at once. This makes double checks the engine behind many spectacular mating combinations and sacrifices: material stops mattering when the king is dragged into the open. These {count} double-check puzzles train you to recognize when a king can be force-marched to its doom.

Frequently asked questions

What is a double check?

A double check is a check delivered by two pieces at the same time, usually via a discovered check. The king is forced to move because two checks cannot both be blocked or captured.

Why must the king move in a double check?

You can block or capture one checking piece, but never two in a single move, so the only legal reply is to move the king.

Are double checks used in checkmates?

Yes. Because they are so forcing, double checks are at the heart of many famous mating patterns, including the smothered mate.

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