diff --git a/react-ystemandchess/src/environments/environment.js b/react-ystemandchess/src/environments/environment.js
index bbdeb1fc..abdffcf2 100644
--- a/react-ystemandchess/src/environments/environment.js
+++ b/react-ystemandchess/src/environments/environment.js
@@ -6,7 +6,7 @@ export const environment = {
 	urls: {
     middlewareURL: 'http://localhost:8000',
     stockfishServerURL: 'http://localhost:8080', // unified naming
-    chessServerURL: 'http://localhost:8080',     // point to mock stockfish server for testing
+    chessServerURL: 'http://localhost:3001',     // chessServer (socket.io game state)
   },
 	productionType: 'development', // development/production
 };
\ No newline at end of file
diff --git a/react-ystemandchess/src/features/engine/StockfishTutor.tsx b/react-ystemandchess/src/features/engine/StockfishTutor.tsx
index eea1668e..c5643794 100644
--- a/react-ystemandchess/src/features/engine/StockfishTutor.tsx
+++ b/react-ystemandchess/src/features/engine/StockfishTutor.tsx
@@ -1071,11 +1071,10 @@ const StockfishTutor: React.FC<Props> = ({ enabled, trigger, fenBefore, fenAfter
         // eslint-disable-next-line no-console
         console.debug('StockfishTutor: analyzing move', { fenBefore, fenAfter, moveUci, uciHistory });
         try { setDebugLog(`analyzing move ${moveUci} | fenBefore=${fenBefore.split(' ')[0]}...`); } catch (e) { /* ignore */ }
-        // Safely read environment URL keys
+        // Stockfish analysis endpoint (/api/analyze) is hosted on stockfishServerURL.
+        // chessServerURL is websocket-only and does not handle HTTP analysis.
         const urls = (environment && (environment as any).urls) || {};
-        // Support multiple environment keys: prefer unified chessServerURL but
-        // also accept stockfishServerURL (some deployments use that name).
-        const rawBase = urls.chessServerURL || urls.stockfishServerURL || urls.chessServer || urls.stockfishServer || '';
+        const rawBase = urls.stockfishServerURL || urls.stockfishServer || '';
         const baseUrl = typeof rawBase === 'string' ? rawBase.replace(/\/$/, '') : '';
 
                         if (!baseUrl) {