I know in StockFish if you type "d" you get an ascii view of the board and a FEN string for the current state. Is there any command in other UCI engines such as Rybka 4 that will output a FEN string?

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From reading various chess source codes, mostly before 2005, I can state that most don't a FEN output. Any that would allow for a non-starting position should accept FEN, as it's just a special form of PGN. Crafty and san_kit both have a "fen" command.

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