Tag Archives: quad forcing chains

Ultrahardcore 3 Schlagt Forcing Chains


In this post, we continue with Sudokuwiki into forcing chain methods, and their relevance to the ultrahardcore theme. Sudokuwiki stalls, as Stefan predicts.  Then we fashion a trial for a logical, but practical outcome. On the grid after the red/orange … Continue reading

Posted in Extreme Solving, Heine, Puzzle Reviews | Tagged , , , | 2 Comments