A Modular Packing System for Sudoku
76My solve of "Inverted Current" by Raumplaner, a sudoku the Modular Lines and Kropki Pairs constraints.
Solve in Sven's SudokuPad WebApp: https://tinyurl.com/8zfc2ra7
This puzzle is from the Modular Lines Puzzle Pack, which is a public pack available on the Cracking the Cryptic Patreon page.
https://www.patreon.com/posts/modular-lines-69391377
The puzzles in this pack were created by FullDeck, JC Godart, jeremydover, Missing a Few Cards, Raumplaner and rockratzero.
Thank you for allowing me to showcase a puzzle from this pack.
There is also a more extensive pack available for Cracking the Cryptic patreon supporters.
Modular Lines were first seen in the wild in a puzzle by FinnishGuy back in November 2021, so credit for this wonderful constraint goes go him.
Puzzle Rules:
- Normal Sudoku rules apply.
- All lines are modular lines. Different colours are used to distinguish where lines cross each other.
- Modular lines: every set of three sequential digits along a line must contain a complete set of residues modulo 3, i.e. one digit from {1,4,7}, one from {2,5,8}, and one from {3,6,9}. Digits may repeat on a line if allowed by other rules.
- Kropki pairs: Digits separated by a white dot form a consecutive pair. Digits separated by a black dot are in a 1:2 ratio. Not all possible dots are shown.
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