Hi, as you'll see in various answers in this community, it's not the calories per se, it's what food the calories come from. If you were to eat a lot of carbs versus a balanced diet, you might have exactly the same calorie count but get fat on the carb diet and do fine on the balanced diet.
A lot of people have different theories and what is really most important is to figure out what works for you and makes you feel your best. I personally have found that I can skip breakfast with no issue and eat an early lunch. But that I do have to eat or my blood sugar drops. I also found that if I skip lunch, I eat like a maniac at dinner. So, spacing it out might be best. I have never gained weight by skipping breakfast. I'm just not hungry in the morning so forcing myself to eat doesn't work. Had that fight with my mom when growing up for years and it hasn't changed after all this time. I have one son that needs breakfast to function and one that is like me and doesn't get hungry in the morning and doesn't eat a lot, just a couple of bites and he's good until lunch time. We're all different. :>)
So, skipping breakfast and lunch and having a brunch works if it works for your lifestyle. Yes, you can look at your calorie count as what you take in for the day verses at what time of day. If you eat all your calories right before bed? That's more problematic but eating a one bigger meal rather than two smaller meals is not a difference. Make healthy choices though and watch your portion size. And alter the plan if you find it isn't working. I personally tend to not eat early in the morning and if I do, it's a few bites and then eat a very early lunch. then I might have a light snack mid afternoon and then dinner. that works best for me.
Are you trying to lose weight or maintain weight, by the way?