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As far as I can tell, the output my solution provides is identical to the one provided by the example. Why is this not being counted as correct?
You're calling "checkerboard(1, n, n)" in the function "checkerboard(n)" Your first call has three arguments for checkerboard. The top-level function has only one. Therefore, you're trying to call checkerboard with too many input arguments.
Hopefully, a late answer is better than none at all.
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