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Well now I want to spend a few hours using it to solve the peaceable queens problem: https://youtu.be/IN1fPtY9jYg

Sounds similar to n-Queens, check out

for inspiration

Actually, the Peaceable Army (or Armies) of Queens problem is a separate problem and much harder than the n-queens problem. Here is a MiniZinc model: http://hakank.org/minizinc/peaceableArmyOfQueens.mzn , and a Picat model: http://hakank.org/picat/peaceableArmyOfQueens.pi

(Also: Thanks for your links to my site.)