You're White. Type or speak your move. Turn Advanced mode on when you're ready to play blind.
Moves: full coords e2e4, target-only pawn push e4, castle O-O / O-O-O, promote e7e8q. Voice: tap the mic and say “e2 to e4” or “knight f3” — it reads the opponent's reply back to you. In Advanced mode the board is covered but you keep playing; the validator tells you exactly why a move is rejected.