Artisanal Sudoku, Volume 147

1. Looper

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

• Correctly placed digits clear the fog around them.

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

• Quadruple circles: a digit inside a white circle must appear in at least one of the four cells surrounding that circle.

• Very rough difficulty estimate: 4/10

Play online: SudokuPad

Note: there may be a few points where cleared fog reveals part of a digit in a quadruple circle. You are of course welcome to use any information you can glean, but identifying partly-obscured digits is not required to solve the puzzle.

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

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2. Harlequin

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

• Killer cages: the sum of the digits inside each cage is equal to the small number in the top left corner, and digits cannot repeat within a cage.

• Thermometers: digits on thermometers increase from the bulb.

• Digits in cells separated by a white dot are consecutive.

• Very rough difficulty estimate: 6/10

Play online: SudokuPad | unshaded | F-Puzzles

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3. Sycamore

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

• Killer cages: the sum of the digits inside each cage is equal to the small number in the top left corner (if given), and digits cannot repeat within a cage.

• 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: 9/10, 7/10

Play online: SudokuPad | unshaded | F-Puzzles

Extra clues: SudokuPad | unshaded | F-Puzzles

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Some other puzzles I enjoyed this week:

• 6-Whisperer Noodles, by wuc

• Dutch Flat Mates - Ten or Eleven, by Marty Sears

• Bubblicious, by Blobz

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This week’s meta-description:
Featuring another pretty approachable fog puzzle!

For premium subscribers, hints and two more bonus puzzles are below. If you like anti-knight and double-digit arrow sums, imagine them both in the same puzzle!