Roughly

It means that there are three different phases of the game, but they are not part of the official rules, but just how games usually work out. It doesn't mean that there are more than three phases, but rather that how each phase develops depends on the players and their abilities so he uses 'roughly' to show that it is inexact and an approximation.

But there are more. Maybe he meant that, right?

"Roughly" implies that the division is not really precise, and the speaker is assuming that there are only three phases for the sake of simplicity.

ozzourti"Roughly" implies that the division is not really precise, and the speaker is assuming that there are only three phases for the sake of simplicity.

But that he could give more detail?

soheil1 ozzourti"Roughly" implies that the division is not really precise, and the speaker is assuming that there are only three phases for the sake of simplicity.But that he could give more detail?

That is not what he is saying. The two responses you have had have explained the 'roughly'. Don't try to read more into than is there.

ozzourti"Roughly" implies that the division is not really precise, and the speaker is assuming that there are only three phases for the sake of simplicity.

Any difference between 'roughly' and 'in a simple division'? What about 'in a simple and inaccurate division'

'A chess game is roughly divided into three phases[...]'

Smoother and more natural is
'A chess game is divided into roughly three phases[...]'

soheil1 ozzourti"Roughly" implies that the division is not really precise, and the speaker is assuming that there are only three phases for the sake of simplicity.Any difference between 'roughly' and 'in a simple division'? What about 'in a simple and inaccurate division'?

soheil1What does it mean that 'A chess game is roughly divided into three phases[...]' ?Means he could name more but he didn't?

It is slightly ambiguous if you know nothing about chess. But we know that he didn't mean "roughly three". We know he meant "roughly divided". There are three phases (opening, middle game, end game), but it is hard to say where one en

soheil1 soheil1 ozzourti"Roughly" implies that the division is not really precise, and the speaker is assuming that there are only three phases for the sake of simplicity.Any difference between 'roughly' and 'in a simple division'? What about 'in a simple and inaccurate division'?

Using "simple and inaccurate division" would not work here. It's not that the d