With this module is possible call the method to_utf8 on a string. This method convert the chess piece identifier character into UTF8 chess character, for example:

:001 > require 'chess/utf8_notation'
 => true
:002 > 'Qf7#'.to_utf8
 => '♕f7#'

To use this utility explicit require is needed: require 'chess/utf8_notation'

Methods
T
Constants
UTF8_MAP = { 'P' => '♙', 'R' => '♖', 'N' => '♘', 'B' => '♗', 'Q' => '♕', 'K' => '♔', 'p' => '♟', 'r' => '♜', 'n' => '♞', 'b' => '♝', 'q' => '♛', 'k' => '♚' }
 

Map a piece identifier character with the corresponding UTF8 chess character
Instance Public methods
to_utf8()

Replace the piece identifier characters with UTF8 chess characters

Source: show 

# File lib/chess/utf8_notation.rb, line 33
def to_utf8
  self.gsub(/[PRNBQKprnbqk]/, UTF8_MAP)
end