I have tested the workbook embedded in this blog article:
How to embed Excel files, calculators on your website? » Chandoo.org
In the embeded workbook example the bottom right buttons do not function when you click them:
Microsoft Feedback
Information about the workbook
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I want to share here my own Excel Chess Board PGN Viewer, done without the help of macros that I've posted on my blog and lets you see any saved chess game in files written in PGN format.
Do you want to try it? Download it from my blog...
If you can't play Minesweeper in the office, why not try it without enabling Excel macros?
I just want to share with you in this lounge my DeactivateBombs.xlsx game. Enjoy it!
Read a post about my Minesweeper game here.