diff --git a/SobolevNS/docs/data/task2_maze/demo.py b/SobolevNS/docs/data/task2_maze/demo.py
new file mode 100644
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+++ b/SobolevNS/docs/data/task2_maze/demo.py
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+"""
+demo.py - короткая демонстрация всех паттернов на маленьком лабиринте.
+"""
+
+from maze_solver import (
+    TextFileMazeBuilder, MazeSolver, ConsoleView,
+    BFSStrategy, DFSStrategy, AStarStrategy, DijkstraStrategy,
+    Player, MoveCommand, CommandHistory,
+)
+
+
+def main():
+    print("=== Builder: загружаем small_10x10.txt ===")
+    builder = TextFileMazeBuilder()
+    maze = builder.build_from_file("mazes/small_10x10.txt")
+
+    view = ConsoleView(verbose=True)
+    view.update({"type": "maze_loaded", "maze": maze})
+
+    print("\nСам лабиринт:")
+    print(maze.render_text())
+
+    print("\n=== Strategy: пробуем все 4 алгоритма ===")
+    solver = MazeSolver(maze)
+    solver.attach(view)
+
+    for cls in (BFSStrategy, DFSStrategy, AStarStrategy, DijkstraStrategy):
+        solver.set_strategy(cls())
+        stats = solver.solve()
+        print(f"--- {stats['strategy']} путь длиной {stats['path_length']} ---")
+        print(maze.render_text(path=stats['path']))
+        print()
+
+    print("=== Command: пройдёмся вручную и сделаем undo ===")
+    player = Player(maze.start)
+    history = CommandHistory()
+    print(f"стартовая позиция: ({player.x},{player.y})")
+
+    # Несколько шагов вправо
+    for d in "DDDD":
+        ok = history.do(MoveCommand(maze, player, d))
+        print(f"  move {d}: {'ok' if ok else 'blocked'} -> ({player.x},{player.y})")
+
+    print("Откатываем 2 хода (undo, undo):")
+    history.undo()
+    history.undo()
+    print(f"  теперь игрок в ({player.x},{player.y})")
+
+    print("\nЛабиринт с игроком:")
+    print(maze.render_text(player=player))
+
+
+if __name__ == "__main__":
+    main()