This fully interactive, pure-ruby chess game runs in the terminal. Color cues in the game not only illuminate the board, but also show players where they can move and what pieces they can take. The game takes advantage of modules, inheritance, and manipulation of user input for a great chess experience.
To play the game, clone this repo, navigate to the project folder, and enter ruby game.rb
In order to check whether moves would put a player in check, I made a deep duplication of the board, performed the move, and checked the result.
def valid_moves(color)
return [] if self.color != color
valid_moves = []
self.possible_moves.each do |move|
new_board = board.dup
new_board.make_move!(position, move)
valid_moves << move unless new_board.in_check?(color)
end
valid_moves
end
def dup
duped = Board.new(true)
grid.each_with_index do |row, row_idx|
row.each_with_index do |square, col_idx|
if square.class == EmptyPiece
duped.grid[row_idx][col_idx] = EmptyPiece.new
else
duped.grid[row_idx][col_idx] = square.dup_with_board(duped)
end
end
end
duped
end
Object-Oriented Programming--all pieces inherit from a Piece class, and the Bishop, Rook, and Queen all inherit from the Slideable module for their multi-tile movement.
Navigate through the game with simple arrow key commands.
def get_input
key = KEYMAP[read_char]
handle_key(key)
end
def handle_key(key)
case key
when :ctrl_c
exit 0
when :return, :space
@cursor_pos
when :left, :right, :up, :down
update_pos(MOVES[key])
nil
else
puts key
end
end
def read_char
STDIN.echo = false
STDIN.raw!
input = STDIN.getc.chr
if input == "\e" then
input << STDIN.read_nonblock(3) rescue nil
input << STDIN.read_nonblock(2) rescue nil
end
ensure
STDIN.echo = true
STDIN.cooked!
return input
end
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent