ChessEngine: Reset the engine state on receiving a ucinewgame command

2 files changed, 7 insertions, 0 deletions

diff --git a/Userland/Services/ChessEngine/ChessEngine.cpp b/Userland/Services/ChessEngine/ChessEngine.cpp
index b1195590a1..e68e45e67b 100644
--- a/Userland/Services/ChessEngine/ChessEngine.cpp
+++ b/Userland/Services/ChessEngine/ChessEngine.cpp
@@ -74,3 +74,9 @@ void ChessEngine::handle_unexpected_eof()
     if (on_quit)
         on_quit(EPIPE);
 }
+
+void ChessEngine::handle_ucinewgame()
+{
+    m_board = Chess::Board();
+    m_last_tree = {};
+}
diff --git a/Userland/Services/ChessEngine/ChessEngine.h b/Userland/Services/ChessEngine/ChessEngine.h
index 1ffd6ea237..9afc0fc394 100644
--- a/Userland/Services/ChessEngine/ChessEngine.h
+++ b/Userland/Services/ChessEngine/ChessEngine.h
@@ -19,6 +19,7 @@ public:
     virtual void handle_position(Chess::UCI::PositionCommand const&) override;
     virtual void handle_go(Chess::UCI::GoCommand const&) override;
     virtual void handle_quit() override;
+    virtual void handle_ucinewgame() override;
     virtual void handle_unexpected_eof() override;
 
     Function<void(int)> on_quit;