[*] with blatant cheating that would make @Snakes blush
pip install z3-solver
import z3
x, y = z3.Ints('x y')
zs = z3.Solver()
zs.add(0 <= x, x <= size_limit)
zs.add(0 <= y, y <= size_limit)
for it in data:
zs.add(z3.Abs(x - it.sx) + z3.Abs(y - it.sy) > it.r)
assert zs.check() == z3.sat
return zs.model().eval(x * 4000_000 + y).as_long()
15_1 took 0.212 seconds
tech/science swag. 
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Hey now. Getting Mathematica to solve it is still programming :p
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