BMR and calorie intake
For what it's worth my opinion is that you should be eating at least your BMR as if you don't eat enough for what your body needs just to maintain it's necessary functions it will go into starvation mode. In this state your metabolism will slow down and you will not burn off calories as efficiently, your body will be trying to hold on to fat deposits as it doesn't know when it will next get enough food to meet it's needs.
Good luck with the weight loss.
For what it's worth my opinion is that you should be eating at least your BMR as if you don't eat enough for what your body needs just to maintain it's necessary functions it will go into starvation mode. In this state your metabolism will slow down and you will not burn off calories as efficiently, your body will be trying to hold on to fat deposits as it doesn't know when it will next get enough food to meet it's needs.
Good luck with the weight loss.