Method: Uci#set_board

Defined in:
lib/uci.rb

#set_board(fen) ⇒ Object

set the board using Forsyth–Edwards Notation (FEN), LONG format including move, castling, etc.

Attributes

  • fen - rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - 0 1 (Please

see en.wikipedia.org/wiki/Forsyth%E2%80%93Edwards_Notation)



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# File 'lib/uci.rb', line 262

def set_board(fen)
  # rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - 0 1
  fen_pattern = /^[a-zA-Z0-9\/]+\s[bw]\s[kqKQ-]+\s[a-h0-8-]+\s\d+\s\d+$/
  unless fen =~ fen_pattern
    raise FenFormatError, "Fenstring not correct: #{fen}. Expected to match #{fen_pattern}"
  end
  reset_board!
  fen.split(' ').first.split('/').reverse.each_with_index do |rank, rank_index|
    file_index = 0
    rank.split('').each do |file|
      if file.to_i > 0
        file_index += file.to_i
      else
        @board[rank_index][file_index] = file
        file_index += 1
      end
    end
  end
  new_game!
  @fen = fen
  send_position_to_engine
end