This is about the only right answer here. I am currently doing something very similar to this, but with some days where I eat more. But even going to this extreme, you probably won’t be losing 50lbs in 2 months.

I am also exercising. Zone 2 walking and weight lifting to maintain and build muscle.

You could try a 3 day fast as well. A full 72 hours. Only water, coffee, or tea. No cream. No sugar. No nothing. See how well you can get through that.

Even with my modified diet, it can be very difficult at times. I am also being monitored by a doctor where I check in every 2 weeks or reach out if I have issues with anything. So, I am being heavily monitored right and would not recommend this method without a doctor present.