It just shows the text, but it should work in any HTML page.
<iframe id="8530357" allowtransparency="true" frameborder="0" style="width:100%;border:none;" src="//www.chess.com/emboard?id=8530357"></iframe><script>window.addEventListener("message",e=>{e['data']&&"8530357"===e['data']['id']&&document.getElementById(`${e['data']['id']}`)&&(document.getElementById(`${e['data']['id']}`).style.height=`${e['data']['frameHeight']+30}px`)});</script>
I actually think it's broken right now.
Though, according to another post, maybe it's working?
https://www.chess.com/forum/view/general/posting-pgn-to-blogger?page=2#last_comment
It just shows the text, but it should work in any HTML page.
<iframe id="8530357" allowtransparency="true" frameborder="0" style="width:100%;border:none;" src="//www.chess.com/emboard?id=8530357"></iframe><script>window.addEventListener("message",e=>{e['data']&&"8530357"===e['data']['id']&&document.getElementById(`${e['data']['id']}`)&&(document.getElementById(`${e['data']['id']}`).style.height=`${e['data']['frameHeight']+30}px`)});</script>