Chase the Fog Away
Another Fog and Killer puzzle!
Estimated difficulty: 1.5/5
Rules
Normal sudoku and killer cage rules apply. Every row, column, and box must contain a complete set of the digits 1-9.
Digits inside cages indicated by dashed lines cannot repeat and must sum to the value in the upper left corner of the cage, if given.
Fog initially covers part of the grid. Placing correct digits clears fog from surrounding cells, possibly revealing more clues. It is possible (even sometimes necessary) to place digits within the fog.
Death by Smog
Estimated difficulty: 1.5/5
Rules
Normal sudoku and killer cage rules apply. Every row, column, and box must contain a complete set of the digits 1-9. Digits inside cages indicated by dashed lines cannot repeat and must sum to the value in the upper left corner of the cage, if given. Fog initially covers part of the grid. Placing correct digits clears fog from surrounding cells, possibly revealing more clues.
Zeroing In
If you get stuck on the break-in to this puzzle, think about the secret and how you might use it multiple times. Zeroing In also appears in GAS Collection 2.
Estimated difficulty: 1.5/5
Rules
Normal sudoku rules apply: every row, column, and box must contain a complete set of the digits 1-9.
Killer cages: Inside cages marked by dashed lines, digits must sum to the number shown in the upper left corner of the cage.
Antiknight: Digits separated by a chess knight's move must be different.
Newgate Fog
We set this puzzle as an introductory fog puzzle for novice solvers. The name is a reference to Newgate Gaol in Britain in connection to the cages that appear through the grid. It was then featured by BremSter as Sudoku on a Cold Foggy Day for FullDeck's birthday on 23 November 2022.
Estimated difficulty: 1/5
Rules
Normal sudoku and killer cage rules apply. Every row, column, and box must contain a complete set of the digits 1-9. Digits inside cages indicated by dashed lines cannot repeat and must sum to the value in the upper left corner of the cage, if given. Fog initially covers part of the grid. Placing correct digits clears fog from surrounding cells, possibly revealing more clues.
Weathervane
This puzzle was set while students in our Puzzles and Paradoxes class were setting their first 6x6 puzzles.
Estimated difficulty: GAS
Rules
Standard 6x6 sudoku rules apply: every row, column, and 2x3 box indicated by darker shaded lines must contain a complete set of the digits 1-6.
Arrows: Digits along an arrow must sum to the value shown in the attached circle. Digits may repeat along the arrow if allowed by other rules.
Waste Measurements
A straightforward killer cage puzzle, Waste Measurements also appears in our GAS Collection 2.
Estimated difficulty: 1/5
Rules
Normal sudoku rules: every row, column, and box must contain a complete set of the digits 1-9.
Normal killer cages: digits within a cage cannot repeat and must sum to the number shown in the upper left.