Sunny, with a Chance of Fog
Sunny, with a Chance of Fog
Difficulty
★★☆☆☆

What a bright and shiny day - even the renbans have turned yellow! Surely nothing could possibly go wrong…

Rules

To start, you need to know these rules:

  • Sudoku: Fill the grid with the digits 1-9, so that each digit occurs exactly once in every row, every column and every 3x3 box.
  • Renban Lines: Digits on a line form a set of non-repeating, consecutive digits in any order.

Later, you’ll need to know these as well:

  • Encroaching fog: The grid is not covered in fog. Placing a correct digit in a cell will summon fog to that cell, and to the 8 surrounding cells. No guessing or erasing of digits is required.
  • Kropki: If two cells do not have a grid line between them, their digits are consecutive. If a renban line is hollow between two cells, the digit in one cell is double the other. Not all kropki clues are given.

Notes:

  • In this puzzle, constraints are being rendered in non-standard ways.
  • The colour tool will not work, and the line tool is strange. Such is the price of summoning fog!

How I made this

I’ve written a short post about how I made this work. Check it out here.

In this series