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Unix Version 7 - man page for reversi (v7 section 6)

REVERSI(6)				   Games Manual 			       REVERSI(6)

       reversi - a game of dramatic reversals

       /usr/games/reversi [ [ -r ] file ]

       Reversi	(also  known  as  `friends', `Chinese friends' and `Othello') is played on an 8x8
       board using two-sided tokens.  Each player takes his turn by placing a token with his side
       up  in an empty square.	During the first four turns, players may only place tokens in the
       four central squares of the board.  Subsequently, with each turn, a  player  must  capture
       one or more of his opponent's tokens.  He does this by placing one of his tokens such that
       it and another of his tokens embrace a solid line of his opponent's  horizontally,  verti-
       cally  or diagonally.  Captured tokens are flipped over and thus can be re-captured.  If a
       player cannot outflank his opponent he forfeits his turn.  The play  continues  until  the
       board is filled or until no more outflanking is possible.

       In  this game, your tokens are asterisks and the machine's are at-signs.  You move by typ-
       ing in the row and column at which you want to place  your  token  as  two  digits  (1-8),
       optionally separated by blanks or tabs.	You can also type

       c      to  continue  the game after hitting break (this is only necessary if you interrupt
	      the machine while it is deliberating).

       g n    to start reversi playing against itself for the next n moves (or	until  the  break
	      key is hit).

       n      to stop printing the board after each move.

       o      to start it up again.

       p      to print the board regardless.

       q      to quit (without dishonor).

       s      to print the score.

       Reversi	also  recognizes  several commands which are valid only at the start of the game,
       before any moves have been made.  They are

       f      to let the machine go first.

       h n    to ask for a handicap of from one to four corner squares.  If you're good, you  can
	      give the machine a handicap by typing a negative number.

       l n    to  set  the  amount of lookahead used by the machine in searching for moves.  Zero
	      means none at all. Four is the default.  Greater than six means you may fall asleep
	      waiting for the machine to move.

       t n    to  tell	reversi  that  you will only need n seconds to consider each move. If you
	      fail to respond in the alloted time, you forfeit your turn.

       If reversi is given a file name as an argument, it will checkpoint the game, move by move,
       by dumping the board onto file.	The -r option will cause reversi to restart the game from
       file and continue logging.


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