# 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!

## Sudoku

If you are new to puzzle-solving, you may want to read the rules of common sudoku variants.

### Highway (2.5★)

Written on February 1, 2023.

F-Puzzles

Penpa

### Genome (2★)

Written on January 31, 2023.

F-Puzzles

Penpa

### Bird (3★)

Written on January 19, 2023.

F-Puzzles

Penpa

### Kakuro Sudoku (2★)

Written on January 11, 2023.

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

F-Puzzles

Penpa

### Equations (2★)

Written on January 7, 2023.

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

F-Puzzles

Penpa

### Uzumaki (1★)

Written on January 6, 2023.

F-Puzzles

Penpa

### Hooks and Swipes (1★)

Written on January 4, 2023.

F-Puzzles

Penpa

### Snowflake (1★)

Written on January 3, 2023.

F-Puzzles

Penpa

### Distant Neighbors (2★)

Written on January 2, 2022.

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).

F-Puzzles

Penpa

### Close Neighbors (1★)

Written on December 31, 2022. As featured on Cracking the Cryptic.

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).

F-Puzzles

Penpa

### That’s What I Mean (2.5★)

Written on December 28, 2022.

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

F-Puzzles

### 7-Eleven (3★)

Written on December 8, 2022.

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

F-Puzzles

### 5 (2★)

Written on December 3, 2022. As featured on Cracking the Cryptic.

The line is a German Whisper. As far as I know, F-Puzzles does not have an option to create a German Whisper, so it does not have any error checking. (Penpa does not either, and placing XV’s is annoying, so I opted to use F-Puzzles instead.)

F-Puzzles

### Alphabet Soup (5★)

Written on November 4, 2022. Warning: This puzzle is extremely hard.

This puzzle has some special rules: each thermo displayed in the right grid must be placed in a unique $3 \times 3$ subgrid on the left grid. Moreover, the position of each thermo must not change with respect to its subgrid (meaning no rotation or translation within the subgrid).

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).

Penpa

An example puzzle is shown below.

Example (Penpa)

### X Marks the Spot (3★)

Written on October 28, 2022.

Penpa

F-Puzzles

## Star Battle

In a star battle, some number of stars must be placed in every row, column, and region. No two stars may touch, even diagonally.

### Star Battle 1 (1★)

Written on January 27, 2023.

Penpa