Thank you for your feedback! The links to the previous 5 articles are at the very bottom of the STAGES OF THE GAME article (sorry it’s so long!)
Otherwise, you can always find the full, updated list of articles on the OGS COMMUNITY RESOURCES page here:
https://forums.online-go.com/t/ogs-community-go-resources/28982
Third heading down - OGS Forum Article Tutorials, under
tonybe’s 19x19 FOR BEGINNERS SERIES
and hit the little triangle on the side. Enjoy!