how do you post a game on here?

Just above where you type a message you'll see small icons. First of them is a miniature chessboard. Click on that and insert the game.

I posted the above game as an example/practice - I've never posted a game before. There should be a chess board icon next to the B icon. From that there are options on how to post a game. 

I copied and pasted the URL for my example. I don't have a paid subscription, just a free normal membership. 

You do not need a subscription. I don't have one.  
There you go, a screenshot.

Thanks so much all! I had been playing/ posting from my phone which didn't have the capability. I'm at my desktop now and see the icons.

We use our enormous brains...

hello