I heard that the best way to maintain is to have a maintenance diet day followed by a weight loss diet on the day next and so on for the rest of the week ? Is that true ?
Give this article a look as it should hopefully answer your question:
By limiting carbs on your off days and consuming more of them on your training days, you'll essenatially be able to burn more fat and add more muscle with better macronutrient timing. While you may maintain your current weight, you'll drastically be able to improve your body composition (i.e. decrease your body fat percentage).
Does that help answer your question?