Champion Tactics with GM Wolff - Discovered Check & Double Check

These are a specific kind of Double Attack or Discovered Attack. A "Discovered Check" happens when one piece moves away and "uncovers" check against the king by the piece behind it. "Double Check" is the same thing, except that the piece moving away also puts the king into check, so the king is attacked

Concepts + Examples of Discovered and Double Checks - Full Chess

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