Module: Chess::PlayKingMoves

Included in:
PlayMovesByType
Defined in:
lib/chess/play_moves/play_king_moves.rb

Overview

PlayKingMoves

Instance Method Summary collapse

Instance Method Details

#castling_move?(piece, board, move_pos) ⇒ Boolean

check if move is a castling_move

Parameters:

Returns:

  • (Boolean) 


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# File 'lib/chess/play_moves/play_king_moves.rb', line 24

def castling_move?(piece, board, move_pos)
  castling_moves = piece.castling_moves(board)
  castling_moves.include?(move_pos)
end

#play_castling_move(piece, board, move_pos) ⇒ void

This method returns an undefined value.

plays the castling move (a special move which moves 2 pieces a king and a rook)

Parameters:



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# File 'lib/chess/play_moves/play_king_moves.rb', line 33

def play_castling_move(piece, board, move_pos)
  play_normal_move(piece, board, move_pos)
  play_rook_jump_move(piece, board, move_pos)
end

#play_king_move(piece, board, move_pos) ⇒ void

This method returns an undefined value.

plays the given castling move or normal move for king

Parameters:



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# File 'lib/chess/play_moves/play_king_moves.rb', line 13

def play_king_move(piece, board, move_pos)
  if castling_move?(piece, board, move_pos)
    play_castling_move(piece, board, move_pos)
  else
    play_normal_move(piece, board, move_pos)
  end
end

#play_rook_jump_move(piece, board, rook_move_pos) ⇒ void

This method returns an undefined value.

plays the move of jumping rook over to the other side of king

Parameters:



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# File 'lib/chess/play_moves/play_king_moves.rb', line 44

def play_rook_jump_move(piece, board, rook_move_pos) # rubocop:disable Metrics/MethodLength
  king_file = piece.pos.first
  king_rank = piece.pos.last
  if king_file == 'c'
    rook = board.piece_at('a', king_rank)
    rook_move_pos = ['d', king_rank]
    play_normal_move(rook, board, rook_move_pos)
  elsif king_file == 'g'
    rook = board.piece_at('h', king_rank)
    rook_move_pos = ['f', king_rank]
    play_normal_move(rook, board, rook_move_pos)
  end
end