diff -r 6cc15ba51424 -r ea2448961441 src/chess/pgn.h
--- a/src/chess/pgn.h	Sat Jul 18 22:00:49 2026 +0200
+++ b/src/chess/pgn.h	Sun Jul 19 17:13:16 2026 +0200
@@ -37,7 +37,20 @@
 #ifdef	__cplusplus
 extern "C" {
 #endif
-    
+
+enum {
+    pgn_no_error = 0,
+    pgn_error_missing_quote,
+    pgn_error_missing_bracket,
+    pgn_error_missing_brace,
+    pgn_error_missing_dot,
+    pgn_error_move_syntax,
+    pgn_error_move_semantics,
+    pgn_error_result_syntax,
+    pgn_error_result_mismatch,
+    pgn_error_unexpected_eof,
+};
+
 int read_pgn(FILE *stream, GameState *gamestate);
 int parse_pgn(const char *data, GameState *gamestate);
 void write_pgn(FILE* stream, GameState *gamestate, bool export_comments);