diff --git a/konnovaea/maze_solver.py b/konnovaea/maze_solver.py
index ec7d079..c22b789 100644
--- a/konnovaea/maze_solver.py
+++ b/konnovaea/maze_solver.py
@@ -167,15 +167,35 @@ class MazeSolver:
     def __init__(self, maze, strategy=None):
         self.maze = maze
         self.strategy = strategy
+        self.observers = []
+
+    def attach(self, observer):
+        self.observers.append(observer)
+
+    def detach(self, observer):
+        self.observers.remove(observer)
+
+    def notify(self, event, data=None):
+        for observer in self.observers:
+            observer.update(event, data)
     
     def set_strategy(self, strategy):
         self.strategy = strategy
     
     def solve(self):
+        if self.strategy is  None:
+            raise ValueError("Стратегия не установлена")
+        self.notify("search_started")
+
         start_time = time.perf_counter()
-        path, visited = self.strategy.find_path(self.maze, self.maze.start, self.maze.exit)
+        path, visited_count = self.strategy.find_path(self.maze, self.maze.start, self.maze.exit)
         end_time = time.perf_counter()
-        return SearchStats(path, (end_time - start_time) * 1000, visited)
+        time_ms = (end_time - start_time) * 1000
+
+        self.notify("search_finished", time_ms)
+        self.notify("path_found", path)
+
+        return SearchStats(path, time_ms, visited_count)
 
 class Observer(ABC):
 
@@ -266,6 +286,10 @@ class MoveCommand(Command):
         self.player.move_to(self.new_cell)
         self.view.update("undo", None)
 
+    def undo(self):
+        self.player.move_to(self.old_cell)
+        self.view.update("undo",None)
+
 class GameController:
 
     def __init__(self, maze, view):
@@ -326,7 +350,16 @@ class GameController:
 
             command = input("Введите команду: ").lower().strip()
 
-            
+            if command in ['w', 'a', 's', 'd']:
+                self.try_move(command)
+            elif command == 'u':
+                self.undo()
+            elif command == 'q':
+                print('Выход из игры')
+                break
+            else:
+                print("Неизвестная команда. Используйте: W/A/S/D - движение, U - отмена, Q - выход")
+