Method: Board#initialize

Defined in:
lib/gorb/board.rb

#initialize(black = nil, white = nil, handicap = 0, komi = 6.5, size = "19x19") ⇒ Board

Initialize a new Board instance. Requires two Player objects, a handicap, a komi and a size as arguments. The handicap should be an integer from 0 to 9. Komi can be negative. Size should be either 9x9, 13x13 or 19x19.

Raises:

  • (ArgumentError) 


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# File 'lib/gorb/board.rb', line 11

def initialize(black=nil, white=nil, handicap=0, komi=6.5, size="19x19")
  @black = black ||= Player.new("Black")
  @white = white ||= Player.new("White")
  @komi = komi
  @size = size
  @groups = []
  @hashes = []
  @turn = black
  @dead_groups = []

  raise ArgumentError, "Incorrect handicap" if handicap < 0 or handicap > 9
  @handicap = handicap
  @komi = 0.5 if handicap > 0
  @turn = white if handicap > 1

  if size == "9x9"
    @letters = %w{A B C D E F G H J}
    handicap_stones = %w{G7 C3 G3 C7 E5 C5 G5 E7 E3}
  elsif size == "13x13"
    @letters = %w{A B C D E F G H J K L M N}
    handicap_stones = %w{K10 D4 K4 D10 G7 D7 K7 G10 G4}
  elsif size == "19x19"
    @letters = %w{A B C D E F G H J K L M N O P Q R S T}
    handicap_stones = %w{Q16 D4 Q4 D16 K10 D10 Q10 K16 K4}
  else
    raise ArgumentError, "Incorrect board size"
  end

  case @handicap
  when 2..5, 7, 9
    handicap_stones[0..(@handicap-1)].each {|s| self.add_stone(s, :black)}
  when 6, 8
    handicap_stones[0..@handicap].each {|s| self.add_stone(s, :black)}
    self.remove_stone(handicap_stones[4]) # Middle stone
  end
end