chording support

include/Board.h

@@ -20,6 +20,7 @@ public:
     int getMineCount() const;
     void regenerateBoard();
     bool isGameWon() const;
+    std::vector<Cell> getNeighborsOf(int x, int y);
 
 private:
     Vector2 size;

include/Cell.h

@@ -38,6 +38,7 @@ public:
     void toggleFlag();
     Content getContent() const;
     void setContent(Content newContent);
+    Vector2 getPosition() const;
 
 private:
     State state = State::Hidden;