diff --git a/src/MainWindow.cpp b/src/MainWindow.cpp
index afca91e..f9d5905 100644
--- a/src/MainWindow.cpp
+++ b/src/MainWindow.cpp
@@ -58,22 +58,6 @@ MainWindow::MainWindow()
   Bind(wxEVT_CLOSE_WINDOW, &MainWindow::OnClose, this);
 }
 
-class AdvancePage : public wxPreferencesPage {
-public:
-  virtual wxString GetName() const { return "Topics"; }
-  virtual wxBitmap GetLargeIcon() {
-    return wxArtProvider::GetBitmap(wxART_HELP, wxART_TOOLBAR);
-  }
-  virtual wxWindow *CreateWindow(wxWindow *parent) {
-    wxPanel *p =
-        new wxPanel(parent, wxID_ANY, wxDefaultPosition, wxSize(800, 800));
-    wxBoxSizer *s = new wxBoxSizer(wxVERTICAL);
-    s->Add(new wxButton(p, COPY_FEN_BTN, L"Copy FEN"), 1, wxEXPAND);
-    p->SetSizer(s);
-    return p;
-  }
-};
-
 void MainWindow::OnSettings(wxCommandEvent &event) {
   if (prefsEditor != NULL) {
     delete prefsEditor;
diff --git a/src/game_tab/Game.cpp b/src/game_tab/Game.cpp
index dab67b8..48e48bf 100644
--- a/src/game_tab/Game.cpp
+++ b/src/game_tab/Game.cpp
@@ -29,6 +29,7 @@ std::string Game::GetTag(std::string tagname) { return (tags[tagname]); }
 void Game::SetTag(std::string tagname, std::string value) {
   tags[tagname] = value;
 }
+
 bool Game::IsBlackToPlay() {
   if (current == NULL) {
     return (false);
@@ -55,6 +56,7 @@ void Game::DeleteMove(HalfMove *m) {
 }
 
 HalfMove *Game::GetCurrentMove() { return (current); }
+
 HalfMove *Game::GetMoves() { return (moves); }
 
 void Game::PromoteMove(HalfMove *m) {
diff --git a/src/game_tab/Game.hpp b/src/game_tab/Game.hpp
index 37b6f77..53249fb 100644
--- a/src/game_tab/Game.hpp
+++ b/src/game_tab/Game.hpp
@@ -37,5 +37,10 @@ public:
   std::vector<std::string> ListTags();
   std::string GetPGN();
   void SetResult(std::string result);
+  /**
+   * @brief Build current game
+   * Verify and play all the moves in the game
+   * while building the fen for each move
+   */
   void BuildAndVerify();
 };
\ No newline at end of file
diff --git a/src/game_tab/HalfMove.hpp b/src/game_tab/HalfMove.hpp
index 07be4d0..51b38a0 100644
--- a/src/game_tab/HalfMove.hpp
+++ b/src/game_tab/HalfMove.hpp
@@ -55,5 +55,11 @@ public:
   void SetFen(std::string fen);
   void SetCapture(char c);
   std::string GetPGN();
+
+  /**
+   * @brief Build current move
+   * Verify and play all the moves in the game
+   * while building the fen for each move
+   */
   void BuildAndVerify(std::string initial_fen);
 };