Is this a fortress

I got a position like this and was wondering if it was a fortress

it is

After 1. Rh5, how does Black get his King to b4?

Some of these are a loss for the weaker side, but I'm sure >90% of class players don't even know the basic winning idea for the rook (it's pretty cool actually if you've never seen it).

But in this specific position white's pieces are bad, so black can probably draw without much trouble.

If the black king lands on c6 I don't know what the winning idea is... doesn't mean it doesn't exist, just saying.

For future reference, the way to reliably draw is to keep your pawns off the same color of your bishop.

Common class player mistake is to think the best way to draw is put the pawns on the same color.

Overall it is better to place the pawns on the opposite color of the bishop. In rare cases like the pure defending purpose in R vs. B it is best to build a protection network e.g. placing the pawns on bishop color.

Indeed this looks like a fortress.

My Stockfish (and Leela ) with  6 men TB , flat all throughout with +2.46 up to depth 85 (3.2 billion nodes).

So, +2.46 come from static evaluation (internal evaluation) , I am pretty sure that it is  (99%) fortress.

There are two signs which indicate a fortress:

-no progress, e.g. high constant number

-more than one move have exactly the same evaluation

Progress? Defending is paramount. Don't think that White is gonna win by any means. Rh5 is not sufficient IMHO.

I mentioned Rh5 in reply to a "Black might be winning with Kb4 and Bc3" claim... not as a winning attempt for White.

The reasons I was doing with Analysis with SF is that , I have concern about a few possible possible positions where white can force black player's fortress.

Position 1. c5 break,

If black take the pawn, it will lead to fragmented pawns with complicated king opposition, I cant gaurante draw or loss in quick though,, That is why I asked Stockfish to calculate.

Possible posistion 2, after c5 pawn break, if black doesnt take the pawn, this position is a forced loss.

Progress means,, if there is a loss, SF should goes up from +2.46 to +123 which is a table score win score before SF can see forced mate. (In this scenerio, it was flat 2.46 throughout) 

Fig 1 or Fig 2 of the my above posts?

Fig 1 is still draw.

Fig 2 is a loss. 

i win these with white for breakfast.

So if it is not a fortress does white have a plan to make progress? If so, what is it?

I don't think he's saying that. I think he's saying even if it's a draw you can't call it a fortress since black's position is not "as set in stone as [it] should be"

Just because a position is a technical draw doesn't mean it's a fortress.

I obviously agree that white should at least try to win but I'm curious what exactly should white try?  If black does a lot of passive moves, what moves would you play to try to push for a win?