Category Archives: Advanced Solving

Techniques applying after candidates are identified. Why they work. How and when to look for them.

Books 3 and 4 In the KD Insane Review

Posted on January 1, 2019 by

Welcome to 2019 Systematic Sudoku. This post continues on the updated KrazyDad v4 review, with KD Insane 435 and 445. This is a brief report on what you’ll find in the updated posts of August 2013. The review update begins … Continue reading →

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KrazyDad Insane 425 Introduces Pattern Slicing

Posted on December 25, 2018 by

This post reports on the introduction of pattern slicing, a.k.a. the pink olive, in KD Insane v4, b2, n5 of 7/30/13. The method is defined, and demonstrated on the 3-panel of Insane 425. This review is being updated first, as … Continue reading →

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The KD Insane 425 Boomerangs

Posted on December 18, 2018 by

This post reports on the introduction of spotting techniques for the boomerang ANL in the updated KrazyDad Insane v4 b2 n5. The cell based examples of this KD Insane review post of July 23, 2013 suggest the inclusion of both … Continue reading →

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KD Insane 415 Updated

Posted on December 11, 2018 by

This post tells the story in the solving of Krazy Dad Insane v4, b1, n5, as reported in updated Sysudoku posts of 7/13/13 and 7/20/13. It’s one way that coloring and pattern analysis work together. Important features of Sysudoku Basic … Continue reading →

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Logic Justifies Aligned Triple AIC Hinges

Posted on September 25, 2018 by

This post takes on a challenge puzzle 17 which follows the Figure 30.1 of the previous post, in Andrew Stuart’s The Logic of Sudoku.   A boomerang ANL shows why aligned triple candidates are eligible to be AIC hinge partners. Logic … Continue reading →

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Fleshing Out Stuart’s ALS Node Figure 30.1

Posted on September 18, 2018 by

Andrew Stuart’s The Logic of Sudoku, in a chapter on Almost Locked Sets, presents an example of an ALS node in a confirming Almost Nice Loop, as Figure 30.1. This post fills in the solution, before and after the series … Continue reading →

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A funster Extreme 116 Labor Day Special

Posted on September 4, 2018 by

An effective bypass, and a simple uniqueness rectangle, and three choices to close down funster Extreme 116 early. Charles Timmerman’s funster Extreme collection is less than  extreme, but a good introduction to advanced solving methods. The basic work is easy, … Continue reading →

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