diff -r f0fc70b6f8f9 -r 2a6d83f4677e src/chess/knight.h
--- a/src/chess/knight.h	Thu Jul 30 18:34:15 2026 +0200
+++ b/src/chess/knight.h	Thu Jul 30 19:17:38 2026 +0200
@@ -36,7 +36,7 @@
 extern "C" {
 #endif
 
-bool knight_chkrules(Move *move);
+bool knight_chkrules(const Move *move);
 #define knight_isblocked(gs,m) false
 
 #ifdef	__cplusplus