Monthly Archives: May 2021

Two Dave Green 4-fills

Posted on May 25, 2021 by Sudent

This post reports Sysudoku Basic on the two Dave Green puzzles of the previous post. In the Sunday 5-star of 4/17/21 on the left, a 5-fill becomes a 4-fill when N6 drops in. It is immediately  resolved to a 3-fill … Continue reading →

Posted in Basic Solving Procedures, Green, Puzzle Reviews | Tagged | Leave a comment

Complex 1-ways Take Out KDI 475

Posted on May 18, 2021 by Sudent

This post updates KrazyDad Insane v.4, b.7, #5 with a bypass 4-fill and a solution free of trials, unless you consider the complex 1-way a trial. To the line marking, we add Beeby’s UR. If 6r1c7, the 9 slinks carry … Continue reading →

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

The Complex 1-Way in AIC Building

Posted on May 11, 2021 by Sudent

This post is about an AIC building option offered by Philip Beeby’s PhilsFolly.com solver, and how and where it is best applied in DIY solving.  Here we refer to this solver as Beeby and this technique as complex 1-way.  Complex … Continue reading →

Posted in Advanced Solving, Extreme Solving, Heine | Tagged , | Leave a comment

Ultrahardcore Review ALS-wings V

Posted on May 4, 2021 by Sudent

This post completes a survey of ALS-wings in the review of Stefan Heine’s ultrahardcore collection. The study was to determine how ALS-wings can be constructed as ALS maps are built. This post covers five more examples in UHC 443 found … Continue reading →

Posted in Advanced Solving, Extreme Solving, Heine | Tagged , | 2 Comments