Module: EnPassantBoardControl

Included in:
Board
Defined in:
lib/sapphire-chess/movement_rules/en_passant_board_control.rb

Instance Method Summary collapse

Instance Method Details

#capture_passed_pawn!(target_square) ⇒ Object 



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# File 'lib/sapphire-chess/movement_rules/en_passant_board_control.rb', line 2

def capture_passed_pawn!(target_square)
  captured_pawn = passed_pawn(target_square)

  self[captured_pawn] = EmptySquare.instance
end

#passed_pawn(target_square) ⇒ Object 



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# File 'lib/sapphire-chess/movement_rules/en_passant_board_control.rb', line 15

def passed_pawn(target_square)
  direction = self[target_square].color == :white ? 1 : -1

  [target_square.first + direction, target_square.last]
end

#was_en_passant?(piece, target_square) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sapphire-chess/movement_rules/en_passant_board_control.rb', line 8

def was_en_passant?(piece, target_square)
  captured_pawn = passed_pawn(target_square)

  self[target_square].is_a?(Pawn) &&
    self[target_square].pawn_to_pass(piece).include?(captured_pawn)
end