Mystery-Akari

(Published on 13. January 2022, 08:00 by CJK)

In December 2021 there was a logic puzzle advent calender on mathebau.rocks, containing variants of standard puzzles. These puzzles are now uploaded to the puzzle portal.

07. Dezember - Akari

This puzzle is a small mystery puzzle: Parts of the rules have to be figured out by yourself.

Rules: Put some lamps on white cells, such that all field are illuminated by lamps and no two lamps illuminate each other. Lamps shine horizontally and vertically until the next grey cell or the border of the grid.
Grey cells indicate the number of lamps in two (of eight possible) directions. You need to discover yourself, which directions theses are (this is the mystery part. Attention: External knowledge is required). As a hint, the directions are already given for one cell.