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I wondered if anyone would spot this :)

There's a recursion depth limit of 500 on the TypeScript compiler, which prevents this solution working for N > 7

Even Aphyr's original Haskell solution only demonstrates N = 6, so in some sense this is an improvement on the state of the art for type-level N Queens solutions /s

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I don't really know what it means, but I've seen it used to work around depth issues in Typescript, but can this use a "trampoline"?

I don't think there's any way to do iteration in the type system (other than recursion), so there's no way around it.

I considered forking the compiler to set a deeper limit, but at some point Typescript itself is going to stack overflow. Also that probably goes a bit beyond what Criss is expecting in an interview...

I don't know about the typescript compiler, but the way around template recursion limits in "classic" C++ template metaprogramming is to figure out a way to make it O(log N) depth instead of O(N) (for some value of N). Like instead of linearly iterating through a range of types through recursion, you divide and conquer. Easier said than done, but possible in some cases.

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