fact: Definition Level_91 := |> _ # # # # # # # # # # # <| |> # # _ _ _ _ # _ _ _ _ # # <| |> # _ X X * O X O * X X _ # <| |> # O O O _ _ _ _ _ O O O # <| |> # _ X X * O X O * X X _ # <| |> # # _ _ _ _ * _ _ _ _ # # <| |> # _ X X * O X O * X X _ # <| +> # O O O _ _ + _ _ O O O # <| |> # _ X X * O X O * X X _ # <| |> # # _ _ _ _ # _ _ _ _ # # <| |> _ # # # # # # # # # # # <| |><| .