FEN is actually an ASCII readout of a chess position.
Once you get them, they're pretty easy to understand. Each rank is divided by a / mark. The eighth rank is listed first, then the seventh, sixth, etc. Any empty squares are represented by a number. Occupied squares are represented by a letter - a capital letter means the piece is white, a lower case letter means that it is black. The pieces that correspond to the letter are the following:
p - pawn
n - knight
b - bishop
r - rook
q - queen
k - king
following the description of the ranks comes the letter b or w by itself, which indicates whose turn it is. After this comes the notation of which rooks have already moved. These will only appear if the corresponding king for that side has not yet moved, as they are an indication of which side may be castled to. A capital Q and/or K indicates that white's Queen's and King's rooks have not been moved. A lower case q or k indicates the same for black. The next space will only indicate a square if a pawn has just moved two squares on the previous move, and this will denote the square that was skipped (for en passant capture purposes.) The following number indicates how many moves have elapsed since a pawn has moved or a piece has been captured (for purposes of the 50 move draw rule.) The last number indicates how many total moves have elapsed in the game.
Hope that helps. It's a very useful feature on RHP.
-mike
Originally posted by legionnaireThat is neat info I did not know. What I do know is you can paste the FEN code into a program like Winboard to see the current positon. Winboard is a neat little program to get a hold of and keep track of games when you arn't online. Easy enough to find online, and free!
[b]FEN is actually an ASCII readout of a chess position.
Once you get them, they're pretty easy to understand. Each rank is divided by a / mark. The eighth rank is listed first, then the seventh, sixth, etc. Any empty squares are represented by a....