Answers are here and never sent to the board. The open clue appears at the top
as soon as someone picks it.
Every control here drives the TV, so the board needs nobody at its keyboard.
Tap a clue below to open it. bad line retires just this clue. bad sync retires every clue from
that song, for when the timing itself is off. Both undo, and both persist —
a retired clue will not come back on a future board.