# 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!

All OctoPuzzles links come with walkthroughs if you need help at any point. (Not all puzzles have OctoPuzzles links.)

## KailOVER #

Published on November 7, 2023.

*Difficulty: 3*

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

## Circular Whispers #

Published on October 22, 2023.

*Difficulty: 2*

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

## River #

Published on July 27, 2023.

*Difficulty: 2*

*Tags: Sudoku, Renban, Killer Cages*

## Pointer Fillomino #

Published on July 24, 2023.

*Difficulty: 4*

*Tags: Fillomino*

Divide the grid into orthogonally connected regions such that no two regions of the same size share an edge. Also place a number in each cell indicating the size of the region it is in.

Arrows indicate that the nearest cell with value n in the indicated direction is n cells away, where n is the digit in the arrow.

An example puzzle is shown below.

## Wiring #

Published on July 3, 2023.

*Difficulty: 2*

*Tags: Sudoku, German Whispers, Kropki*

## Last Stand #

Published on June 17, 2023.

*Difficulty: 3*

*Tags: Sudoku, Thermometers*

## 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.)

## Mind The Gap #

Published on May 24, 2023.

*Difficulty: 3*

*Tags: Sudoku, X-Sums, Diagonal*

## WXV #

Published on May 24, 2023.

*Difficulty: 2*

*Tags: Sudoku, Renban, German Whispers, XV*

This was a gift for my high school Macroeconomics teacher.

## Push #

Published on May 24, 2023.

*Difficulty: 2*

*Tags: Sudoku, Killer Cages, Kropki*

## 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.)

## Tepper #

Published on May 8, 2023.

*Difficulty: 2*

## First Burn #

Published on May 3, 2023.

*Difficulty: 4*

*Tags: Suguru, Chaos Deconstruction, German Whispers, Ambiguity, Odd/Even*

Suguru: Fill some cells in the grid with the digits 1-9 such that no digit repeats in a row or column. All digits must belong to a region, which is a collection of orthogonally connected cells. A region of size n contains the digits 1 through n once each. Regions may not touch each other orthogonally, although they may touch each other diagonally.

Whisper/Scream Lines Ambiguity: Each line is either a Whisper or a Scream; the solver must determine which. Adjacent digits on a Whisper line differ by 5 or more. Adjacent digits on a Scream line differ by 2 or more, and furthermore, every digit on a Scream must be high (6789).

If two cells along the same Whisper line are not on an orthogonally connected path along the line, then they must not be in the same region. This rule does NOT apply for Scream lines.

All branches of a line are considered the same line.

Odd/Even: Digits in a gray circle are odd. Digits in a gray square are even.

Any cell containing a line, Odd, or Even clue must have a digit in it.

## Silent Suguru #

Published on April 24, 2023.

*Difficulty: 5*

*Tags: Suguru, Chaos Deconstruction, German Whispers, Odd/Even*

Suguru: Fill some cells in the grid with the digits 1-9 such that no digit repeats in a row or column. All digits must belong to a region, which is a collection of orthogonally connected cells. A region of size n contains the digits 1 through n once each. Regions may not touch each other orthogonally, although they may touch each other diagonally.

German Whispers: Adjacent digits on a German Whisper line differ by 5 or more.

Two cells along the same German Whisper belong in the same region if and only if they are on an orthogonally connected path along the line.

Odd/Even: Digits in a gray circle are odd. Digits in a gray square are even.

Any cell containing a German Whisper, Odd, or Even clue must have a digit in it.

## Quadrants #

Published on April 22, 2023.

*Difficulty: 2*

## 6:13 #

Published on April 16, 2023.

*Difficulty: 3*

*Tags: Sudoku, Anti-Knight, Killer Cages*

## Conjoined #

Published on April 4, 2023.

*Difficulty: 2*

*Tags: Sudoku, Killer Cages*

## 9x9 Skyscraper Thermos #

Published on March 23, 2023.

*Difficulty: 4*

*Tags: Sudoku, Skyscrapers, Thermometers*

## 6x6 Skyscraper Thermos #

Published on March 22, 2023.

*Difficulty: 2*

*Tags: Sudoku, Skyscrapers, Thermometers*

## Minutia #

Published on March 21, 2023.

*Difficulty: 1*

*Tags: Sudoku, Killer Cages, Diagonal*

## Pointy #

Published on March 19, 2023.

*Difficulty: 2*

## Wings #

Published on March 18, 2023.

*Difficulty: 2*

*Tags: Sudoku, Killer Cages, Diagonal*

## Zoom #

Published on March 13, 2023.

*Difficulty: 2*

## 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.

## Cars #

Published on March 5, 2023.

*Difficulty: 2*

*Tags: Sudoku, Killer Cages, Kropki*

## 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.

## Intersections #

Published on February 27, 2023.

*Difficulty: 2*

*Tags: Sudoku, X-Sums, Diagonal*

## 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.

## QT #

Published on February 17, 2023.

*Difficulty: 1*

*Tags: Sudoku, Thermometers, Quads*

## 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.

## Class of '23 #

Published on February 11, 2023.

*Difficulty: 3*

*Tags: Sudoku, Killer Cages*

## El Corazón #

Published on February 8, 2023.

*Difficulty: 2*

*Tags: Sudoku, Killer Cages, Thermometers*

## Stairs #

Published on February 6, 2023.

*Difficulty: 2*

*Tags: Sudoku, Killer Cages, Diagonal*

## Sandwich Stars #

Published on February 5, 2023.

*Difficulty: 1*

*Tags: Star Battle, Sandwiches*

Two stars must be placed in every row and column. No two stars may touch, even diagonally.

Additionally, it must be possible to place some digits in cells without stars that signify the number of adjacent stars (diagonally adjacent cells count) and digits do not repeat in a row or column. Also, clues outside a row or column indicate the sum of the digits between the stars.

Cells with a circle must have a digit in them.

Determining where every digits goes is not part of the puzzle; it merely must be possible to place them. (In other words, the placement of the digits is not necessarily unique; only the placement of the stars must be.)

## Latin Stars #

Published on February 4, 2023.

*Difficulty: 1*

*Tags: Star Battle, X-Sums*

Two stars must be placed in every row and column. No two stars may touch, even diagonally.

Additionally, it must be possible to place some digits in cells without stars that signify the number of adjacent stars (diagonally adjacent cells count) and digits do not repeat in a row or column.

Also, some digits are given as clues are outside each row and column. The first X squares in a row or column in the direction of a clue, where X is the first digit seen in that row or column (which is not necessarily in the first square of the row or column), must add to the indicated sum. (Any square without a digit does not contribute to the sum.)

Determining where these digits go is not part of the puzzle; it merely must be possible to place them. (In other words, the placement of the digits is not necessarily unique; only the placement of the stars must be.)

## Highway #

Published on February 1, 2023.

*Difficulty: 2*

*Tags: Sudoku, Killer Cages, Diagonal*

## Genome #

Published on January 31, 2023.

*Difficulty: 2*

*Tags: Sudoku, German Whispers, Renban, Kropki*

## Star Battle 1 #

Published on January 27, 2023.

*Difficulty: 1*

*Tags: Star Battle*

## Bird #

Published on January 19, 2023.

*Difficulty: 3*

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

## 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).

## Equations #

Published on January 7, 2023.

*Difficulty: 2*

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

## Uzumaki #

Published on January 6, 2023.

*Difficulty: 1*

*Tags: Sudoku, Classic Sudoku*

## Hooks and Swipes #

Published on January 4, 2023.

*Difficulty: 1*

*Tags: Sudoku, Thermometers*

## Snowflake #

Published on January 3, 2023.

*Difficulty: 1*

*Tags: Sudoku, Classic Sudoku*

## 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).

## 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).

## 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.

## 7-Eleven #

Published on December 8, 2022.

*Difficulty: 3*

*Tags: Sudoku, Killer Cages*

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

## 5 #

Published on December 3, 2022.

*Difficulty: 2*

*Tags: Sudoku, German Whispers, CTC Features*

## 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).

An example puzzle is shown below.

**Hint 1**

**Hint 2**

## X Marks the Spot #

Published on October 28, 2022.

*Difficulty: 3*

*Tags: Sudoku, Thermometers, Arrows*