yes

Sources/Engine/Board.swift

@@ -76,6 +76,12 @@ public class Board: CustomStringConvertible, EventDelegate {
 
 	func notify(_ event: Event) {
 		#warning("Not implemented")
+		switch event {
+		case .kingInCheck(let piece, let king):
+			king.insertThreat(piece)
+		case .piecePinned(let p1, let p2):
+			break
+		}
 	}
 
 	internal func addPieceToTarget(_ piece: Piece, target: Square.Position) {