Flexible and muscular? He's probably referring to his body type.
what is a moderate advantage in chess ?

So in the title you're asking what a moderate advantage is, but then in the actual post you ask something completely different? I'm a little confused too.
To me a moderate advantage means one side definitley has a noticeable advantage but the other side has a tenable position anyway.
Flexible is kind of an interesting way to describe one's style, because you always want to pick flexible plans in chess, but I guess it could mean someone who likes to keep all options open and doesn't like to make too many concrete decisions (they can often be put off for a while but eventually you have to pick exactly which plan or plans to follow and exactly how you do it) but likes to just improve his position. That's what I like to do lol.
I have no clue about the "muscular" part...

This was also very confusing to me, so I tried to re-word it:
What is a moderate advantage in chess?
Also, I'm having trouble understanding what it means to have a flexible style of play. When I asked my brother who's a NM (just became one) the way he characterises a flexible style is confusing. His tone of voice seems to characterize a flexible style as strong or aggressive which doesn't make sense to me. I know "flexible" is an actual style of chess as it's even used to describe some personalities in the Chessmaster series. My best guess is it means both positional and something else at the same time (?) but I don't understand.
So my questions are, in chess: 1) what is a moderate advantage and, 2) what is a flexible style?
A moderate advantage isn't a term I've heard thrown around a lot -- I'm guessing because it's moderate that it's not extreme... so it means one side has an edge. So this is not a winning advantage, lets say like a pawn for no compensation would be technically a winning advantage. This is just a slight advantage in the position. It may easily be given away after 1 or 2 slight inaccuracies, but it's definitely present.
A flexible style means the player isn't overly concerned with attacking or waiting for the endgame. More specifically they aren't too concerned with what types of advantages their position is able to get. For example, a positional player may not like the dynamic advantages of a tactical battle in a wide open position while a dynamic attacker may be uncomfortable in a closed maneuvering game.
So a flexible player doesn't mind acquiring either dynamic or static advantages, and is comfortable playing different types of positions. It's important to note comfort because chess positions aren't played on a whim, as a player you have to meet the needs of the position -- it's whether or not you're comfortable with a wide range of needs that makes you flexible.
In the cases where a player can chose, a flexible player will chose whichever method he evaluates as resulting in the most favorable end position regardless of if it means heading into an endgame with a slight advantage or committing to an attack.

Interesting. But what you describe is what I call a balanced player, as opposed to someone who just likes to play flexible moves. That's probably what he meant though.

Interesting. But what you describe is what I call a balanced player, as opposed to someone who just likes to play flexible moves. That's probably what he meant though.
Hmm, I guess you're right. It's hard to distinguish between the two. A flexible player for sure would play flexible moves -- but a flexible player would probably also be a balanced player I guess.

Interesting. But what you describe is what I call a balanced player, as opposed to someone who just likes to play flexible moves. That's probably what he meant though.
Hmm, I guess you're right. It's hard to distinguish between the two. A flexible player for sure would play flexible moves -- but a flexible player would probably also be a balanced player I guess.
I would think when someone says flexible as a style or player characteristic what comes to my mind is both the ability to play any kind of positions and also makes me kind of think of a counter-attacker than can adapt easily to different plans. But a "balanced player" is a good a guess as any to what that guy was refering to.
Like the title says and also I'm having touble figuring out a style of play when asked my brother whos a NM (just became one
) he talks about his style of play being flexable in a muscular manor and thats also one of the chessmasters for the PS2 personalities but just don't understand what that is does this mean both being a positional player or something
?