Artisanal Sudoku, Volume 191

1. Even Flow

• Normal sudoku rules apply (fill each row, column, and 3x3 box with the digits 1-9 once each), and all clues are standard.

• Thermometers: digits on the thermometer increase from the bulb.

• German whispers: along green lines, digits differ from their neighbors by at least 5.

• Digits in cells with a shaded square are even.

• Very rough difficulty estimate: 4/10

Play online: SudokuPad

New to variant sudoku? Check out these beginner-friendly guides to cages and other popular rulesets.

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2. Boulevard

• Normal sudoku rules apply (fill each row, column, and 3x3 box with the digits 1-9 once each), and all clues are standard.

• Thermometers: digits on thermometers increase from the bulb.

• Renban lines: purple lines contain a non-repeating set of consecutive digits in any order.

• Digits in cells separated by a V sum to 5.

• Digits in cells separated by an X sum to 10.

• Very rough difficulty estimate: 5/10

Play online: SudokuPad

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3. Breaking Point

• Normal sudoku rules apply (fill each row, column, and 3x3 box with the digits 1-9 once each), and all clues are standard.

• Cages: the sum of the digits inside each cage is equal to the small number in the top left corner.

• Arrows: the sum of the digits along an arrow is equal to the digit in the connected circle, and these digits can repeat if allowed by other rules.

• Very rough difficulty estimates: 8/10, 6/10

Play online: SudokuPad | unshaded

Extra clues: SudokuPad | unshaded

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Prime Week Bonus Puzzle! It’s been a little while, but I’m about to make up for it, because this is the first of four primes from 191 to 199. This puzzle is called Uneasy Alliance, and I’m happy with how it turned out, but the difficulty might be a little higher than I’d like, so I also made an alt version (as always, the image shows the version with fewer clues).

• Normal 6x6 sudoku rules apply in both grids (fill each row, column, and box with the digits 1-6 once each).

• The same digit cannot appear in the same relative position (e.g. the digit in r1c1 in the left grid must be different from the digit in r1c1 in the right grid).

• Skyscraper clues: each cell in the center column contains a single digit which acts as a skyscraper clue for both grids. Each clue indicates the number of digits visible in that direction, where higher digits block the view of lower digits (e.g. a 2 in the center column means there are two digits visible in that row in the left grid (looking from right to left), and two digits visible in that row in the right grid (looking from left to right)).

• Arrows: the sum of the digits along an arrow is equal to the digit in the connected circle, and these digits can repeat if allowed by other rules.

• Renban lines: purple lines contain a non-repeating set of consecutive digits in any order.

• Very rough difficulty estimates: 7/10, 5/10

Play online: SudokuPad

Extra clues: SudokuPad

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Some other puzzles I enjoyed this week:

• Under the green-wood, by rockratzero

• Kanji: Fuku (Blessing), by Mazzel (via mazzel-sudoku.com)

• Shelter, by Aeon

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This week’s meta-description:
At long last, another prime week.

For premium subscribers, hints and two more bonus puzzles are below. If you prefer puzzles on the tougher side, the trend continues…