A Cleverly-Titled Logic Puzzle Blog: Monday Mutant 36: Room and Reason (regular minus domino)

The leftmost grid is a Room and Reason puzzle. The middle grid is a "mutant" Room and Reason puzzle in which, instead of no two black cells being allowed to share an edge, every black cell must share an edge with EXACTLY ONE other black cell (the rules are otherwise unchanged). The given numbers in the two puzzles are in the same locations (although some are shown as blank squares rather than numbers), and when the givens in the latter puzzle are subtracted from the correspondingly located givens in the former puzzle, the resulting differences are the numbers shown in the rightmost grid. Solve both puzzles.

(click to enlarge)

Who's the author?

Grant Fikes has been writing logic puzzles in an amateur capacity since 2005, and in a professional capacity since 2013. He serves as one of the most prolific contributors to the blog on Grandmaster Puzzles; his works have also appeared in Akil Oyunlari, in Sudoku Xtra, the United States Puzzle Competition (2012-2014), and in a smartphone app. Grant has also created Kakuro puzzles for Kakuro Conquest (the puzzles haven't appeared yet, for whatever reason). As a word puzzle constructor, Grant's puzzles have appeared in the short-lived Will Shortz's Wordplay, in GAMES World of Puzzles, and in the smartphone app Bonza, and his creation Pent Words has won an award from Kadon Enterprises.

Excluding puzzles in the Logicsmith Exhibition series which were created by others, or where otherwise indicated, all puzzles on this blog are the intellectual property of Grant Fikes, and are released under a Creative Commons Attribution-Noncommercial 3.0 United States License.

Monday Mutant 36: Room and Reason (regular minus domino)

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