Thank you for the feedback!
You are so smart to find the "always win" strategy! I don't even think about it.
As for "a whole cluster", do you mean more than 1 line?
Did you try the Learning Mode? I can add the more than 1 line example into the Learning Mode to clarify it.
replyYeah it took me a second to understand how the game worked in learning mode.
replyBy "whole cluster" I mean when there is more than 1 line completed with the same piece. For example if you have 2 lines that meet at a corner, placing the corner piece triggers a flip for both / all lines that meet in that corner. I found myself surprised by that the first time it happened.