Logic Masters Deutschland e.V.

We are so back

To anyone who's wondering where I've been, the answer is busy! Between now and my last puzzle a few months ago, I published a journal piece, wrote a thesis, graduated, moved, and am now officially employed!

I don't know exactly how regularly I'll keep up setting; work is rough, and I have other creative projects that I'm working on. Still, though, it's good to be back!

This puzzle was set for round 7 of the first Skunkworks League competition season hosted by damasosos92, in which participants get a few weeks to set a puzzle per round. For this round, among other constraints, puzzles had to be a quattroquadri. At least 8 different standard, local variants had to be used, and each could be used exactly once. Furthermore, contestants were to aim for a 2-3 star difficulty level on LMD.

I do think this puzzle might be closer to 4 star territory for some, so I've provisionally rated it at that, but I could see it sitting at 3 stars here as well.

Also, if you enjoyed this puzzle and are looking for more, you can find a whole 36 other handcrafted quadroquattri puzzles (in the 2-4 star range) that I spent more time and care setting in my quadroquattri pack, which includes some of my favorite puzzles I've ever set!

Rules:

Regular sudoku rules apply; place a digit between 1-9, inclusive, into every cell such that digits do not repeat in any row, column, or bold 3x3 box.

Regular double arrow: The thin gray line with a circles on each end is a double arrow; the sum of the digits along the line must be equal to the sum of the two circles.

Regular region sum line: The light blue line is a region sum line; box borders must divide this line into segments with equal sums.

Regular Dutch whisper: The orange line is a Dutch whisper; adjacent digits along the line must differ by at least 4.

Regular entropic line: The peach line is an entropic line; each set of 3 adjacent digits along the line must contain one of {123}, one of {456}, and one of {789}.

Regular lockout line: The dark blue line with diamonds on each end is a lockout line; the digits in the diamonds must differ by at least 4, and the digits on the line must not be between or equal to the digits in the diamonds.

Regular renban line: The pink line is a renban line; digits along the line must form a nonrepeating, contiguous sequence (i.e. 123 / 465).

Regular modular line: The teal line is a modular line; each set of 3 adjacent digits along the line must contain one of {147}, one of {258}, and one of {369}.

Regular parity line: The red line is a parity line; each set of 2 adjacent digits along the line must include one odd number and one even number.

Regular sequence line: The thick gray line is a sequence line; when read from either end to the other, digits along the line must form an arithmetic sequence.

Solve online:

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