--- a/src/network.h	Mon Aug 24 14:30:47 2026 +0200
+++ b/src/network.h	Mon Aug 24 14:31:37 2026 +0200
@@ -43,7 +43,6 @@
 #define NETCODE_GAMEINFO 0x10
 #define NETCODE_PGNDATA 0x11
 #define NETCODE_MOVE 0x20
-#define NETCODE_CHECK 0x22
 #define NETCODE_CHECKMATE 0x23
 #define NETCODE_STALEMATE 0x28
 #define NETCODE_NOMATERIAL 0x29