Rey's Puzzles

Difficulties are marked according to the Logic Masters Germany scale. These are just my best guesses, so please let me know if you have a different opinion!

Shrug #

Published on June 21, 2024.

Difficulty: 4

Tags: Sudoku, Arrows, Killer Cages

Image of 'Shrug' puzzle

CTC

Penpa

F-Puzzles

Hedge Maze #

Published on May 19, 2024.

Difficulty: 4

Tags: Sudoku, Arrows, Killer Cages, Odd/Even

Image of 'Hedge Maze' puzzle

CTC

Penpa

LMD

Maria #

Published on March 9, 2024.

Difficulty: 4

Tags: Sudoku, Killer Cages

Image of 'Maria' puzzle

CTC

Penpa

F-Puzzles

LMD

KailOVER #

Published on November 7, 2023.

Difficulty: 3

Tags: Sudoku, Region Sum Lines, Circle Counters, Diagonal

Image of 'KailOVER' puzzle

CTC

Penpa

LMD

Circular Whispers #

Published on October 22, 2023.

Difficulty: 2

Tags: Sudoku, Circle Counters, German Whispers, Odd/Even

Image of 'Circular Whispers' puzzle

CTC

Penpa

River #

Published on July 27, 2023.

Difficulty: 2

Tags: Sudoku, Renban, Killer Cages

Image of 'River' puzzle

CTC

Penpa

Wiring #

Published on July 3, 2023.

Difficulty: 2

Tags: Sudoku, German Whispers, Kropki

Image of 'Wiring' puzzle

CTC

Penpa

F-Puzzles

Last Stand #

Published on June 17, 2023.

Difficulty: 3

Tags: Sudoku, Thermometers

Image of 'Last Stand' puzzle

CTC

Penpa

F-Puzzles

LMD

Fillomino Chaos Construction 2 #

Published on June 5, 2023.

Difficulty: 5

Tags: Sudoku, Chaos Construction, Fillomino, Sightlines

Divide the grid into 9 orthogonally connected regions of size 9, and place the digits 1-9 in the grid such that each row, column, and region has one copy of each digit.

Then, divide each region into some polyominoes such that no two polyominoes of the same size share an edge.

Digits in a circle indicate the size of the polyomino it is in, and digits in a square indicate the number of polyominoes in its region.

A digit in a clued cell indicates the number of cells seen in the indicated directions combined (including itself). POLYOMINO borders obstruct vision.

Penpa solvers only: Answer check requires all digits to be filled out, green edges for region borders, and double edges for pentomino borders that are NOT region borders. (All region borders are also pentomino borders because of the rules.)

Image of 'Fillomino Chaos Construction 2' puzzle

CTC

Penpa

LMD

WXV #

Published on May 24, 2023.

Difficulty: 2

Tags: Sudoku, Renban, German Whispers, XV

This was a gift for my high school Macroeconomics teacher.

Image of 'WXV' puzzle

CTC

F-Puzzles

Mind The Gap #

Published on May 24, 2023.

Difficulty: 3

Tags: Sudoku, X-Sums, Diagonal

Image of 'Mind The Gap' puzzle

CTC

Penpa

F-Puzzles

Push #

Published on May 24, 2023.

Difficulty: 2

Tags: Sudoku, Killer Cages, Kropki

Image of 'Push' puzzle

F-Puzzles

Fillomino Chaos Construction #

Published on May 22, 2023.

Difficulty: 5

Tags: Sudoku, Chaos Construction, Fillomino

Divide the grid into 9 orthogonally connected regions of size 9, and place the digits 1-9 in the grid such that each row, column, and region has one copy of each digit.

Then, divide each region into some polyominoes such that no two polyominoes of the same size share an edge.

Digits in a circle indicate the size of the polyomino it is in, and digits in a square indicate the number of polyominoes in its region.

Penpa solvers only: Answer check requires all digits to be filled out, green edges for region borders, and double edges for pentomino borders that are NOT region borders. (All region borders are also pentomino borders because of the rules.)

Image of 'Fillomino Chaos Construction' puzzle

CTC

Penpa

LMD

Tepper #

Published on May 8, 2023.

Difficulty: 2

Tags: Sudoku, Renban, Arrows

Image of 'Tepper' puzzle

CTC

Penpa

F-Puzzles

Quadrants #

Published on April 22, 2023.

Difficulty: 2

Tags: Sudoku, Arrows, Quads

Image of 'Quadrants' puzzle

CTC

F-Puzzles

6:13 #

Published on April 16, 2023.

Difficulty: 3

Tags: Sudoku, Anti-Knight, Killer Cages

Image of '6:13' puzzle

CTC

Penpa

F-Puzzles

Conjoined #

Published on April 4, 2023.

Difficulty: 2

Tags: Sudoku, Killer Cages

Image of 'Conjoined' puzzle

CTC

Penpa

F-Puzzles

9x9 Skyscraper Thermos #

Published on March 23, 2023.

Difficulty: 4

Tags: Sudoku, Skyscrapers, Thermometers

Image of '9x9 Skyscraper Thermos' puzzle

CTC

Penpa

LMD

6x6 Skyscraper Thermos #

Published on March 22, 2023.

Difficulty: 2

Tags: Sudoku, Skyscrapers, Thermometers

Image of '6x6 Skyscraper Thermos' puzzle

CTC

Penpa

Minutia #

Published on March 21, 2023.

Difficulty: 1

Tags: Sudoku, Killer Cages, Diagonal

Image of 'Minutia' puzzle

CTC

F-Puzzles

Pointy #

Published on March 19, 2023.

Difficulty: 2

Tags: Sudoku, Arrows

Image of 'Pointy' puzzle

CTC

F-Puzzles

LMD

Wings #

Published on March 18, 2023.

Difficulty: 2

Tags: Sudoku, Killer Cages, Diagonal

Image of 'Wings' puzzle

CTC

Penpa

F-Puzzles

LMD

Zoom #

Published on March 13, 2023.

Difficulty: 2

Tags: Sudoku, Renban, Kropki

Image of 'Zoom' puzzle

CTC

F-Puzzles

Monster Without A Name #

Published on March 11, 2023.

Difficulty: 4

Tags: Sudoku, Chaos Construction, Monster Cages

This puzzle is a chaos construction. Cages indicate the product of each region sum contained in a cage. For instance, if a 4-cell cage contained 1,2 in one region and 3,4 in another region, its total would be (1+2)x(3+4)=80. Cages may be contained in one region, in which case, the total is just the sum of the cells. Digits may not repeat in a cage.

Image of 'Monster Without A Name' puzzle

CTC

Penpa

F-Puzzles

LMD

Cars #

Published on March 5, 2023.

Difficulty: 2

Tags: Sudoku, Killer Cages, Kropki

Image of 'Cars' puzzle

CTC

F-Puzzles

LMD

Monster Cages #

Published on March 4, 2023.

Difficulty: 2

Tags: Sudoku, Chaos Construction, Monster Cages

This puzzle is a chaos construction. Cages indicate the product of each region sum contained in a cage. For instance, if a 4-cell cage contained 1,2 in one region and 3,4 in another region, its total would be (1+2)x(3+4)=80. Cages may be contained in one region, in which case, the total is just the sum of the cells. Digits may not repeat in a cage.

Image of 'Monster Cages' puzzle

CTC

Penpa

F-Puzzles

Intersections #

Published on February 27, 2023.

Difficulty: 2

Tags: Sudoku, X-Sums, Diagonal

Image of 'Intersections' puzzle

CTC

Penpa

F-Puzzles

Starry Sums #

Published on February 21, 2023.

Difficulty: 2

Tags: Sudoku, Diagonal, Star Battle

Shade a square in each row, column, and region such that each digit 1-9 is shaded once and no two shaded squares touch, not even diagonally. Digits outside the grid indicate the sum of the digits it sees before the shaded square.

Image of 'Starry Sums' puzzle

CTC

Penpa

F-Puzzles

LMD

QT #

Published on February 17, 2023.

Difficulty: 1

Tags: Sudoku, Thermometers, Quads

Image of 'QT' puzzle

CTC

F-Puzzles

LMD

X-Lines Sudoku #

Published on February 14, 2023.

Difficulty: 4

Tags: Sudoku, X-Lines, Killer Cages

On an X-Line, if X is on the line then so must 10-X. Digits may repeat on a line, so 1159 would be a valid X-Line.

Image of 'X-Lines Sudoku' puzzle

CTC

Penpa

F-Puzzles

LMD

Class of '23 #

Published on February 11, 2023.

Difficulty: 3

Tags: Sudoku, Killer Cages

Image of 'Class of '23' puzzle

CTC

Penpa

F-Puzzles

LMD

El Corazón #

Published on February 8, 2023.

Difficulty: 2

Tags: Sudoku, Killer Cages, Thermometers

Image of 'El Corazón' puzzle

CTC

Penpa

F-Puzzles

Stairs #

Published on February 6, 2023.

Difficulty: 2

Tags: Sudoku, Killer Cages, Diagonal

Image of 'Stairs' puzzle

CTC

Penpa

F-Puzzles

Highway #

Published on February 1, 2023.

Difficulty: 2

Tags: Sudoku, Killer Cages, Diagonal

Image of 'Highway' puzzle

CTC

Penpa

F-Puzzles

LMD

Genome #

Published on January 31, 2023.

Difficulty: 2

Tags: Sudoku, German Whispers, Renban, Kropki

Image of 'Genome' puzzle

CTC

Penpa

F-Puzzles

Bird #

Published on January 19, 2023.

Difficulty: 3

Tags: Sudoku, German Whispers, Little Killers, X-Sums

Image of 'Bird' puzzle

CTC

Penpa

F-Puzzles

LMD

Kakuro Sudoku #

Published on January 11, 2023.

Difficulty: 2

Tags: Sudoku

Each number in a shaded cell is either the sum of the two digits below or to the right of it (possibly both).

Image of 'Kakuro Sudoku' puzzle

CTC

Penpa

F-Puzzles

Equations #

Published on January 7, 2023.

Difficulty: 2

Tags: Sudoku, Equations

Digits in cells separated by +, x, and = signs form valid arithmetic operations. (All arithmetic operations involve only one-digit numbers.) Classic sudoku rules apply.

Image of 'Equations' puzzle

CTC

Penpa

F-Puzzles

Uzumaki #

Published on January 6, 2023.

Difficulty: 1

Tags: Sudoku, Classic Sudoku

Image of 'Uzumaki' puzzle

CTC

Penpa

F-Puzzles

Hooks and Swipes #

Published on January 4, 2023.

Difficulty: 1

Tags: Sudoku, Thermometers

Image of 'Hooks and Swipes' puzzle

CTC

Penpa

F-Puzzles

Snowflake #

Published on January 3, 2023.

Difficulty: 1

Tags: Sudoku, Classic Sudoku

Image of 'Snowflake' puzzle

CTC

Penpa

F-Puzzles

Distant Neighbors #

Published on January 2, 2023.

Difficulty: 2

Tags: Sudoku, Dutch Neighbors

Every number must be adjacent to at least one number 4 away from it. For example, 4 must share a side with either a 8 or a 9 (possibly both).

Image of 'Distant Neighbors' puzzle

CTC

Penpa

F-Puzzles

Close Neighbors #

Published on December 31, 2022.

Difficulty: 1

Tags: Sudoku, Consecutive Neighbors, CTC Features

Every number must share a side with at least one other consecutive number. For example, 2 must share a side with either a 1 or a 3 (possibly both).

Image of 'Close Neighbors' puzzle

CTC

Penpa

F-Puzzles

That's What I Mean #

Published on December 28, 2022.

Difficulty: 2

Tags: Sudoku, Killer Cages, Averaging Cells

Numbers in a blue circle are the arithmetic mean of its orthogonal neighbors.

Image of 'That's What I Mean' puzzle

CTC

F-Puzzles

LMD

7-Eleven #

Published on December 8, 2022.

Difficulty: 3

Tags: Sudoku, Killer Cages

The digits orthogonally adjacent to a 7 must sum to 11.

Image of '7-Eleven' puzzle

CTC

Penpa

F-Puzzles

LMD

5 #

Published on December 3, 2022.

Difficulty: 2

Tags: Sudoku, German Whispers, CTC Features

Image of '5' puzzle

CTC

Penpa

F-Puzzles

LMD

Alphabet Soup #

Published on November 4, 2022.

Difficulty: 5

Tags: Sudoku, Thermometers

Each thermo displayed in the right grid must be placed in a unique region on the left grid. Moreover, the position of each thermo must not change with respect to its region (meaning no rotation or translation within the region).

Also note that the answer check will only work when the right side is cleared of digits (though you, of course, may consider yourself finished at the time you place the last digit in the left side of the grid).

Image of 'Alphabet Soup' puzzle

Penpa

LMD

An example puzzle is shown below.

Image of 'Alphabet Soup' example puzzle

Image of 'Alphabet Soup' example puzzle solution

Example

Hint 1
Exactly three 1’s are in the bottom row of their box. (The same holds true for any other digit, any other row, or any other column.)
Hint 2
You need to consider at most how many 1’s and how many 2’s can be in the bottom row in conjunction, according to the thermos. Then you need to ask how many there are, according to sudoku rules. (Use Hint 1 for the latter part!)

X Marks the Spot #

Published on October 28, 2022.

Difficulty: 3

Tags: Sudoku, Thermometers, Arrows

Image of 'X Marks the Spot' puzzle

CTC

Penpa

F-Puzzles

LMD