PROBLEM:
If the puzzle you solved before you solved the puzzle you solved after you solved the puzzle you solved before you solved this one, was harder than the puzzle you solved after you solved the puzzle you solved before you solved this one, was the puzzle you solved before you solved this one harder than this one?
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SOLUTION:
Yes.  There are only 2 puzzles being spoken of: this one, and the one before this one.  The entire question could be rephrased like this:

If the puzzle you solved before this one was harder than this one, was the puzzle you solved before this one harder than this one?

Obviously, the answer to the question is simply yes