-
Recent Posts
Recent Comments
graliontorile on Doing Every 4-Fill gralion torile on A Hidden Triple From Hidden… Sudent on KrazyDad Super-Tough 555 Proxy on KrazyDad Super-Tough 555 Sudent on Ultrahardcore Review ALS-wings… Archives
- May 2022
- April 2022
- March 2022
- February 2022
- January 2022
- December 2021
- November 2021
- October 2021
- September 2021
- August 2021
- July 2021
- June 2021
- May 2021
- April 2021
- March 2021
- February 2021
- January 2021
- December 2020
- November 2020
- October 2020
- September 2020
- August 2020
- July 2020
- June 2020
- May 2020
- April 2020
- March 2020
- February 2020
- January 2020
- December 2019
- November 2019
- October 2019
- September 2019
- August 2019
- July 2019
- June 2019
- May 2019
- April 2019
- March 2019
- February 2019
- January 2019
- December 2018
- November 2018
- October 2018
- September 2018
- August 2018
- July 2018
- June 2018
- May 2018
- April 2018
- March 2018
- February 2018
- January 2018
- December 2017
- November 2017
- October 2017
- September 2017
- August 2017
- July 2017
- June 2017
- May 2017
- April 2017
- March 2017
- February 2017
- January 2017
- December 2016
- November 2016
- October 2016
- September 2016
- August 2016
- June 2016
- May 2016
- April 2016
- March 2016
- February 2016
- January 2016
- December 2015
- November 2015
- October 2015
- September 2015
- August 2015
- July 2015
- June 2015
- May 2015
- April 2015
- March 2015
- February 2015
- January 2015
- December 2014
- November 2014
- October 2014
- September 2014
- August 2014
- July 2014
- June 2014
- May 2014
- April 2014
- March 2014
- February 2014
- January 2014
- December 2013
- November 2013
- October 2013
- September 2013
- August 2013
- July 2013
- June 2013
- May 2013
- April 2013
- March 2013
- February 2013
- January 2013
- December 2012
- November 2012
- October 2012
- September 2012
- August 2012
- July 2012
- June 2012
- May 2012
- April 2012
- March 2012
- February 2012
- January 2012
- December 2011
- November 2011
- October 2011
- September 2011
Categories
- Advanced Solving
- Alary
- Barker
- Basic Solving Procedures
- Berthier
- Expert Reviews
- Extreme Solving
- Gordon
- Gould
- Green
- Hanson
- Heine
- Hobiger
- KrazyDad
- Longo
- Monster
- Nakamoto
- Pitkow
- Puzzle Reviews
- Sheldon
- Sheldon
- Shortz
- shye
- Snyder
- Stephens
- Stuart
- Sudoku Toolware
- Sysudoku History
- Tom Sheldon
- Uncategorized
- Weekly Extreme
Meta
Tag Archives: ALS_XZ
Softening left page ultrahardcore 353
Here is another puzzle the DIY oriented solvers suggest is too hard for human solving, even as the moves they find are too instructive to ignore. This post gets quickly to ALS methods that demand exhaustive enumeration from the DIY … Continue reading
Two Solvers Play With UHC 265
Heine’s left page ultrahardcore 265 is solved in two posts. This post follows the alternative methods of the review solvers Beeby and Sudokuwiki until they converge on a long series of AIC in the second post. Here is the grid … Continue reading
An ultrahardcore 221 ALS AIC Clinic
Continuing a solution path with a finned starfish (5 lines), Beeby carries us through an unlikely series of ALS aided AIC, dancing around two stalled coloring clusters. The contest ends with regular AIC finally expanding and wrapping the clusters. Here … Continue reading
Posted in Advanced Solving, Puzzle Reviews, Heine
Tagged ALS aided AIC, coloring trap, ALS wings, coloring wrap, ALS_XZ, ultrahardcore review, finned starfish
Leave a comment
UHC 89 Breaks Out from a Monster Basic
This post coordinates the two DIY solvers used in the ultrahardcore review, choosing and interpreting solver methods and ignoring some removals to match the Sysudoku DIY order of battle. A series of early moves breaks the ice for AIC building … Continue reading
Posted in Advanced Solving, Puzzle Reviews, Heine
Tagged APE, basic traces, ALS_XZ, ultrahardcore review, ALS-wing, dfc boomer, i-way
Leave a comment
Lite Coloring Avoids Trials in KrazyDad 425
This post backs up your lite coloring effort, I hope, on KrazyDad 425. The initial lite trees deliver a cluster merge, and as these grow, lite coloring gives two confirmations and a coloring wrap to finish without trial. The first … Continue reading
A Lite Update on Castillo’s Only Extreme 347
This post updates a solution by coloring trial in the review post of 12/19/17. A bypass of 6 4-fills resolves 3 of them immediately, but goes no further than the original 3-fill only bypass. Then we follow Beeby through a … Continue reading
Beeby Softens Up ultrahardcore 443
This post reports a series of Beeby ALS-XZ featuring alignments in Z and X, almost to the point where a trial is needed. A simple basic trace means a hard start, with a crowded grid. Sudokuwiki’s 579-wing is a Beeby … Continue reading
Posted in Extreme Solving, Heine, Puzzle Reviews
Tagged ALS-wing, ALS_XZ, complex 1-way, dfc boomer, Stefan Heine, ultrahardcore review
Leave a comment
An SASdC Trial Defeats ultrahardcore 355
In this post a SASdC trial plays like a regular hard puzzle from other collections. The trial amounts to adding two clues, and seeing what happens. But it isn’t guessing, and instead of making a small gain, the trial solves … Continue reading
A Coloring Trial Weakens ultrahardcore 311
Sorry about last week’s post arriving a week earlly. This week continues the solving of Stefan Heine’s ultrahardcore 311 with a coloring trial, and an enabled Beeby marching to the solution. Here is the trial grid, after the removal of … Continue reading
Posted in Extreme Solving, Heine
Tagged ALS 1-way, ALS_XZ, coloring trial, hidden rectangles, naked quad, Stefan Heine, ultrahardcore review
Leave a comment
Beeby Carries UHC 223 to a Second Cluster
This post reports how the Beeby solver comes to life after the Single Alternate Sue de Coq trial , and nibbles Heine’s ultrahardcore 223 to a second coloring cluster. Beeby notes the ANL as a simple chain, but it’s AIC … Continue reading
Posted in Extreme Solving, Heine, Puzzle Reviews
Tagged ALS chains, ALS_XZ, double ALS, Stefan Heine, ultrahardcore review
2 Comments