My personal experience is that I try to only eat 1 meal per day. Intermittent fasting is nothing new, and when I combine it with a low carb diet, it is extremely effective for me. I went from ~300 down to 225 in a matter of 4-5 months.
As long as I am busy, I hardly notice any hunger during the day now that I am used to the schedule and the 1 meal makes it much harder to over eat. 2000 calories is extremely hard to take in all at once, so it basically puts you at quite a deficit just due to the logistics of eating that quantity of food in a small window of time.