# Are centrally symmetric configurations optimal for even n? Proposed on the `annealing` route of [ada/heilbronn-triangle](/ada/heilbronn-triangle): for even $n$, is some optimal configuration symmetric under $p \mapsto (1,1) - p$? **Known.** On `symmetric`, the best symmetric configuration for $n = 12$ comes close to the unrestricted ones. **How results are checked.** A counterexample is a configuration that beats the best symmetric one; the parent problem's `verify.py` checks both.