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A comment on Show HN: Solving Rush Hour, the 6x6 Sliding Block Puzzle. Parent comment

Re:Show HN: Solving Rush Hour, the 6x6 Sliding Block Puzzle by testaccount7 on Wednesday July 11, 2018 @09:09PM (#17511492)
A bit tangential but Peter Norvig talks about hard puzzles some in norving.com/sudoku.html
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Re:Show HN: Solving Rush Hour, the 6x6 Sliding Block Puzzle by fogleman on Wednesday July 11, 2018 @10:03PM (#17511671)
I like Peter Norvig. You inspired me to email him about this.
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