40 pieces in a 4×10 configuration at either end of the board. The ranks are printed on one side only and placed so that the players cannot identify the opponent's pieces. Players may not place pieces in the lakes or the 12 squares in the center of the board. Such pre-play distinguishes the fundamental strategy of particular players, and influences the outcome of the game. Gameplay Players alternate moving; red moves first. The right to move first does not significantly affect game play (unlike chess). Each player moves one piece per turn. A player must move a piece in their turn; there is no "pass". Two zones in the middle of the board, each 2×2, cannot be entered by either player's pieces at any time. They are shown as lakes on the battlefield and serve as choke points to make frontal assaults less direct. The game can be won by capturing the opponent's Flag or all of their moveable pieces. It is possible to have ranked pieces that are not moveable because they are trapped behind bombs. In unusual cases, it is possible to draw, for example, when both players' flags are protected by bombs and each player has one remaining piece which is not a miner. The average game has 381 moves. The number of legal positions is 10115. The number of possible games is 10535. Stratego has many more moves and substantially greater complexity than other familiar games such as chess and backgammon; however, unlike those games where a single bad move at any point may result in loss of the game, most moves in Stratego are inconsequential as players think in "games not moves" (Boer, 2007). Rules of movement All movable pieces, with the exception of the Scout, may move only one step to any adjacent space vertically or horizontally (but not diagonally). A piece may not move onto a space occupied by a like-color piece. Bomb and Flag pieces are not moveable. The Scout may move any number of spaces in a straight line (such as the rook in chess). In the older versions of Stratego the Scout could not move and strike in the same turn; in newer versions this was allowed. Even before that, sanctioned play usually amended the original Scout movement to allow moving and striking in the same turn because it facilitates gameplay. No piece can move back and forth between the