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Play     Each of the two sides corresponds to one player; they are referred to here as pink and green. The game begins with four markers placed in a square in the middle of the grid, two facing pink side up, two pieces with the green side up.    The pink player makes the first move.Pink must place a piece in such a position that there exists at least one straight (horizontal, vertical, or diagonal) line between the new piece and another pink piece, with one or more green pieces between them. After placing the piece, pink turns over (flips, captures) all green pieces lying on a straight line between the new piece and any anchoring pink pieces. All reversed pieces now show the pink side, and pink can use them in later moves -- unless green has reversed them back in the meantime.     Players take alternate turns. If one player cannot make a valid move, play alerts message and passes back to the other player.     The game shows the results on every move and marks which player is on a turn.When neither player can move, the game ends. This occurs when the grid has filled up.     The player with more pieces on the board at the end wins. Strategy     A beginner often looks for the move that will reverse the greatest possible number of pieces, trying for immediate numerical advantage. But this strategy is too shortsighted to work. In practice, the game pieces change color many times in the course of a game, so early numerical advantage is rarely an advantage, and is often a disadvantage because it reduces "mobility" for the majority player.    While it is possible to achieve complete dominance early and capture all the tiles, it is extremely unlikely. Instead of numerical advantage, the key elements of successful Reversi strategy are corners, mobility, edge play, parity, endgame play, and looking ahead. Enjoy the game!
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