The Owen's defence is a chess opening which starts with 1. e4 b6!?. This opening is playable if Black can get a quick c7-c5 break, where he has a pawn on e6, b6, and then he pushes c7-c5.
However, Stockfish on 22ply depth disagrees, giving White a +0.89 advantage. This hardly seems playable, as White has almost the advantage of an extra pawn.
So there must be a reason for this evaluation. I think that White can somehow prevent the break, to get a full pawn center, but I can't find any way to do so without compromising my pawn structure.