Allow Multiple lines = 0

[killerducky]

On lichess you can set multiple lines to 0. Then you can see the eval, but not the variations. I want to use this e.g. quiz myself on a mate sequence. I cannot see the move, but if I make the wrong move I will see the eval change so I know that was wrong. Similar for middle game positions I can see if I make a very bad move, but without seeing what the suggested moves are.