diff --git a/chess_paths/chess_paths.c b/chess_paths/chess_paths.c
index 93b8f28..174c70c 100644
--- a/chess_paths/chess_paths.c
+++ b/chess_paths/chess_paths.c
@@ -1,5 +1,16 @@
 // vim: set ts=4 sw=4 et tw=80:
 
+/*
+ * Assignment 3 - Chess paths
+ * Claudio Maggioni
+ *
+ * No external source was used as parts of code or as an inspiration for the
+ * overall algorithm.
+ *
+ * The flag DEBUG, if defined, activates some debug messages printe on stdout.
+ * This is disabled to comply with tests.
+ */
+
 #include "chess_paths.h"
 #include <assert.h>
 #include <stdlib.h>