See my comment above
This comment is hidden because it contains spoiler information about the solution
Sorry I don't remember. My son explained it to me a couple of years ago. Must be on the internet somewhere.
Approved.
I don't mind.
raise ValueError('puzzle is unsolvable')
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See my comment above
This comment is hidden because it contains spoiler information about the solution
Sorry I don't remember. My son explained it to me a couple of years ago. Must be on the internet somewhere.
This comment is hidden because it contains spoiler information about the solution
Approved.
I don't mind.
This comment is hidden because it contains spoiler information about the solution
raise ValueError('puzzle is unsolvable')