Analyzer
The difficulty rating and which techniques a puzzle needs.
Every puzzle you load, generate or import is solved once by the same engine, with the techniques ranked as in HoDoKu. The result is shown in the top bar (for example Hard · 612) and in the Summary tab.
Level and score
The level is the hardest class of technique the puzzle needs: Easy, Medium, Hard, Unfair or Extreme. The score adds up a points value for every step of the solution path, so two puzzles on the same level can still differ in how long and how awkward the path is.
Techniques used
The Summary tab lists the techniques on the solution path, with how often each one is used, hardest first. Each name links to its guide. The hardest technique is tagged.
Paste any puzzle into Import to see its rating before you start. Nothing is sent anywhere: the analysis runs in your browser.