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Tag Archives: AIC almost nice loops
Only Extreme 304 is AIC Level
This post and the next update Castillo’s Only Extreme Sudoku review with a solution of OnEx 304 without trials. Most of the solution path is in AIC building, the most challenging level of Sysudoku Advanced. The only move prior to … Continue reading
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
Only Extreme 132 Is Cut From the Extreme Team
Another example of expansion of a limited coloring network via the not-both test on an AIC slink. It’s an extreme tactic that need only be tried as a last resort. While the expansion does work in OnEx 132, it is … Continue reading
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
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
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 AIC almost nice loops, Bernhard Hobiger, coloring trap, Grouped AIC ANL, Hodoku, X-panel
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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
