This preprint claims to show that Othello is solved: https://arxiv.org/abs/2310.19387

This question resolves positively if, in my opinion, it has been accepted as correct in 6 months.

By accepted as correct, I mean that some scrutiny by credible individuals has been applied, and the claim of the paper is accepted as correct. This may involve the author of the paper providing more code or data.

If the paper goes effectively unnoticed for 6 months, this resolves as N/A.