Tag Archives: XY nice loop

The Elbow n-set of shye’s Roman Candle

Posted on February 1, 2022 by Sudent

This post is about the sixth example of forum commentator shye’s introductory post on fireworks, his name for elimination methods based on the restriction of candidate values in row/box/column combinations. Our series of posts on fireworks defines a particular form … Continue reading →

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KrazyDad Super-Tough 525 Review Update

Posted on June 8, 2021 by Sudent

This post has an updated solution of KDST 525, starting with a 3-fill and a rare remote pair. The bv scan has an irregular XYZ-wing, and the 6-panel features a  long XY nice loop that illustrates the XY Railroad on … Continue reading →

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Super Fiendish 17 and 27

Posted on December 10, 2019 by Sudent

Two of Brian Challenger’s Super Fiendish, 17 and 27, are put together because solution paths are short. Stage right is the Sufi 17 line marked grid with an immediate, and decisive, XY nice loop. The follow up features an early … Continue reading →

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The FTSPAH Review Begins With a Tour

Posted on October 15, 2019 by Sudent

Here I report on 4 and 24, the first two of 10 puzzles selected for the Sysudoku review of the FTSPAH puzzle book. Starting grids were displayed at the end of last week’s post.   I also explain a few things … Continue reading →

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Lucky Panda 240 Rides Nice Loop Coloring

Posted on June 25, 2019 by Sudent

The candidates of a nice loop form a coloring cluster. This review puzzle from the Lucky Panda Sudoku review illustrates a decisive nice loop coloring. Two hidden UR 2 show up as well. After a productive bypass and box marking, … Continue reading →

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A funster Extreme 116 Labor Day Special

Posted on September 4, 2018 by Sudent

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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Funster Extreme 46 Not So Much

Posted on August 7, 2018 by Sudent

The review of Charles Timmerman’s funster Hard to Extreme Sudoku continues with Extreme 46. It’s  entertainingly advanced. Extreme 46 has its moments.  The basic trace is spread across the page with 3-fill after 3-fill. Two unusual events occur in box … Continue reading →

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Only Not Extreme 46

Posted on October 10, 2017 by Sudent

The review of Castillo’s Only Extreme collection continues with Only Extreme 46.  A very extensive bypass is survived, to leave very little to add in box marking, and an interesting line marking.  The rest is murder by the usual suspects … Continue reading →

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Closing Very Hard v.2 with the Real 38

Posted on July 4, 2017 by Sudent

To be fair, here is my do over of the real Ardv2 38, the one with a given 7 in r7c6.  My omission of it hatched a productive distraction, having no bearing on the collection it came from. The basic … Continue reading →

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Suset Jelly in nrc Space

Posted on December 6, 2016 by Sudent

Here we work through an advanced supersymmetry example from The Hidden Logic of Sudoku, without the symmetries.  The humanly practical tools of Sysudoku are entirely adequate to the task. The theme of this review is that the burdensome emulation SudoRules, … Continue reading →

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