Tag Archives: AIC almost nice loops

World’s Hardest Sudoku 65


Not really hardest, but entertaining. World’s Hardest Sudoku 65 has a UR challenge, a UPE, a finned swordfish, an AIC ANL, and a very different color wrap. It’s also a few cells short of a multiple solution. Basics are moderate, … Continue reading

Posted in Advanced Solving, Puzzle Reviews | Tagged , , , , , , | Leave a comment

Only Extreme 132 Joins the Extreme Team


Another payoff for expansion of a limited coloring network via AIC slink. It’s an extreme tactic that, after six years of blogging, I finally blundered my way into.  This collection illustrates the not-both trial thoroughly. Please comment if you know … Continue reading

Posted in Extreme Solving, Puzzle Reviews | Tagged , , , , , , | Leave a comment

Fick’s Advanced Path on Only Extreme 3


In the pre-review post of August 29, Cluster Extension by Not-Both Trials, a series of coloring cluster expansions were made by testing the not-both condition for AIC slink coloring. Like other trials, this tactic is considered extreme here in Sysudoku. … Continue reading

Posted in Advanced Solving, Puzzle Reviews | Tagged , , , | Leave a comment

Remaining THLS XV hXY Avoided


Here we complete the report on the puzzles selected in The Hidden Logic of Sudoku to show that hidden XY chains are an “inescapable tool for the advanced player”, and therefore  require the generation and maintenance of symmetry grids. None … Continue reading

Posted in Advanced Solving, Berthier, Puzzle Reviews | Tagged , , , , , , | 2 Comments

Hodoku Grouped AIC I


This post uses two grouped AIC ANL from Hodoku to illustrate how such chains are inspired and constructed. After the first, readers are challenged to try this approach on the following examples, with checkpoint to follow. I was prepared to … Continue reading

Posted in Advanced Solving, Expert Reviews, Hobiger | Tagged , , , , , | Leave a comment

Simplifying Hodoku AIC


This post examines the AIC examples from the Discontinuous Nice Loop section of Hodoku Chain and Loop techniques page. Hodoku claims to demonstrate a new type of elimination technique based on AIC loops, called AIC Discontinuous Type 2. AIC ANL … Continue reading

Posted in Advanced Solving, Expert Reviews, Hobiger | Tagged , , , , | Leave a comment

Revisiting Wex 435


This post updates the Weekly Extreme Review with a revisit of Wex 435, a puzzle that proved resistant to the single alternate Sue de Coq and was deemed the toughest in the review series, inspiring an extreme ALS trial, the … Continue reading

Posted in Advanced Solving, Puzzle Reviews, Weekly Extreme | Tagged , , , , , , , , | Leave a comment