I'm figuring it's a side move since you've been focusing on that, plus advantages on the side tend to be easier to quantify
Naturally I assume we don't want to leave ourselves open to an unbalanced edge which I believe rules out the top side
I think it's 7? My reasoning is we're able to play it without flipping the purple piece to the upper-right so we don't give them an exploitable unbalanced edge. When/if purple takes 8, we can take to the left and then gain another move by balancing the edge ourselves on the right. Hopefully that makes sense
If it's something not on the side then I have no idea lol
Naturally I assume we don't want to leave ourselves open to an unbalanced edge which I believe rules out the top side
I think it's 7? My reasoning is we're able to play it without flipping the purple piece to the upper-right so we don't give them an exploitable unbalanced edge. When/if purple takes 8, we can take to the left and then gain another move by balancing the edge ourselves on the right. Hopefully that makes sense
If it's something not on the side then I have no idea lol