1 files changed, 6 insertions, 0 deletions
diff --git a/src/HalfMove.hpp b/src/HalfMove.hpp
index dc238cd..e049571 100644
--- a/src/HalfMove.hpp
+++ b/src/HalfMove.hpp
@@ -34,5 +34,11 @@ public:
   std::string Dump();
   /// @brief Perform a deep copy of a HalfMove
   void Copy(HalfMove *copy);
+  /// @brief Get HalfMove located x down the MainLine 
+  HalfMove* GetHalfMoveAt(int);
+};
+
+struct HalfMoveOutOfRange : public std::exception {
+  const char *what() const throw() { return "HalfMove distance is out of range"; }
 };
 } // namespace pgnp
 \ No newline at end of file