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!

The search feature will find all puzzles with any of the selected difficulties and all of the selected tags.

Difficulty 1 2 3 4 5

Tags Sudoku Killer Cages Diagonal Thermometers German Whispers Arrows Kropki Renban Chaos Construction Odd/Even Star Battle X-Sums Equations Fillomino CTC Features Chaos Deconstruction Circle Counters Classic Sudoku Consecutive Neighbors Monster Cages Quads Skyscrapers Suguru Ambiguity Anti-Knight Averaging Cells Dutch Neighbors Irregular Little Killers Region Sum Lines Sandwiches Sightlines X-Lines XV

Close Neighbors 2 #

Published on May 21, 2026.

Difficulty: 3

Tags: Sudoku, Consecutive Neighbors

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).

CTC

Penpa

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).

CTC

Penpa

F-Puzzles