{
  "patternType": "FORK",
  "description": "Knight fork hitting king and queen simultaneously.",
  "cases": [
    {
      "id": "fork_knight_checks_king_and_queen",
      "initialFen": "4k3/5q2/8/5N2/8/8/8/6K1 w - - 0 1",
      "sideToMove": "white",
      "bestMove": { "san": "Nd6+", "uci": "f5d6" },
      "resultingFen": "4k3/5q2/3N4/8/8/8/8/6K1 b - - 1 1",
      "expectedPattern": {
        "type": "FORK",
        "side": "white",
        "attackerSquares": ["d6"],
        "targetSquares": ["e8", "f7"],
        "explanationKey": "knight_fork"
      },
      "context": "The knight hop gives check on e8 while simultaneously attacking the queen on f7.",
      "tags": ["tactics", "knight"]
    }
  ]
}