fix example on 400

index.php

@@ -26,9 +26,6 @@
                 $warning = "Cette grille a plusieurs solutions.";
         }
         require("sudoku.php");
-    } else {
-        if ($currentGrid) {
-            require("400.php");
     } else {
         $grid = new Grid();
         $gridAsString = $grid->toString();
@@ -39,6 +36,9 @@
 
         $_SESSION["nbSolutions"] = 1;
 
+        if ($currentGrid) {
+            require("400.php");
+        } else {
             header("Location: $newGridUrl");
         }
     }