-
Recent Posts
Recent Comments
Sudent on Sysudoku Sue de Coq Gmamla on Sysudoku Sue de Coq Sudent on All Hands on Deck Against UHC… Gerald Asp on All Hands on Deck Against UHC… Sudent on Go Fish! Archives
- 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
- Green
- Hanson
- Heine
- Hobiger
- KrazyDad
- Longo
- Monster
- Nakamoto
- Pitkow
- Puzzle Reviews
- Sheldon
- Sheldon
- Shortz
- Snyder
- Stephens
- Stuart
- Sudoku Toolware
- Sysudoku History
- Tom Sheldon
- Uncategorized
- Weekly Extreme
Meta
Tag Archives: AIC
No THLS Case for Hidden XY Chains
This post and the next demonstrate that the examples presented in The Hidden Logic of Sudoku as requiring “Hidden” XY Chains actually have alternative, and much less demanding, resolution paths in the Sysudoku repertoire. The burdensome maintenance of symmetry grids is … Continue reading
Hodoku Nice Loop Mythology
This post dismisses the Stephens/Hobiger theory of cell links, propogation rules, and loop closing rules as unnecessary and overcomplicated. It uses the first two Hodoku AIC ANL examples to demonstrate the alternative Sysudoku chain construction process. As a blogger, one … Continue reading
Posted in Advanced Solving, Expert Reviews, Hobiger
Tagged AIC, AIC hinge, Bernhard Hobiger, Discontinuous Nice Loops, Hodoku, nice loops
Leave a comment
Hodoku Chain Building
This post endorses Hodoku’s explanation of strong and weak links, regretfully confined to chains. His discussions of grouping and ALS nodes are supplemented for completeness. Hodoku graphic representation of chains by cell shading and candidate coloring is seen to be … Continue reading
Posted in Advanced Solving, Expert Reviews, Hobiger
Tagged AIC, ALS AIC node, Bernhard Hobiger, grouped chains, Hodoku, strong links, weak links
Leave a comment
Decoding Hodoku Chain Notes
This post comments on the first part of the Hodoku “Chains and Loops” page. It reveals the premise dependent view of chains to be based on computer coding, and unsuited for human solving advice. It explains Hodoku’s chain notations as … Continue reading
Posted in Expert Reviews, Hobiger
Tagged AIC, Bernhard Hobiger, forcing chains, Hodoku, irregualr XYZ-wing, XY-wing
Leave a comment
A Sudokuwiki Resolution of Insane 475
In this post Insane 475 is taken through basic and then submitted to Andrew Stuart’s Sudokuwiki solver for advanced solving. In the original review, the puzzle was solved by an Single Alternative Sue de Coq trial, but in this update … Continue reading
Posted in Extreme Solving, KrazyDad, Puzzle Reviews
Tagged AIC, AIC trial, pattern slicing, pink olive analysis, sue-de-coq
Leave a comment
Digit Forcing Chains?
Is Andrew Stuart’s Digit Forcing Chains a useful new solving technique? Actually, no. Andrew’s sudowiki site introduces digit forcing chains with examples that raise – and seem to settle – that question. Needless confusion is created by this unwarranted introduction. First, have you … Continue reading
Toxic ALS in Unsolvable 40
Our struggle with Unsolvable 40 continues with a detailed walk through of the search for ALS toxic sets, and an analysis of the its stuck number ALS. Here is our grid with row ALS superimposed on a thin, as yet … Continue reading
Posted in Advanced Solving
Tagged AIC, ALS toxic sets, color clusters, LPO, Medusa coloring, POM, toxic sets, XY-chain
1 Comment
The ALS Node in the AIC
This post explains how an Almost Locked Set, an ALS, can be a node in an AIC, providing a slink between two winks connecting candidates of different numbers. In this blog the ALS was first applied in the Sysudoku version … Continue reading
Posted in Advanced Solving
Tagged AIC, AIC nice loop, ALS AIC node, ALS aided AIC, ALS node
3 Comments
Dessert at the Colorful AIC Feast
Happy 4th! Last post, on Maestro 49 of Fall 2009 we mixed coloring and AIC to good effect, and discovered the joys of the slink/wink color shortcut in AIC chains. We continue now with two clusters. The second, red/orange cluster … Continue reading
Posted in Advanced Solving
Tagged AIC, AIC almost nice loops, AIC hinge, color clusters
Leave a comment
A Colorful AIC Feast
We are met today to confirm the AIC take down by sysudokie readers on a tough steer, Megastar Maestro 49 of Fall 2009. The rodeo begins with limited coloring, the identification of five AIC hinge cells, and an extension of … Continue reading
Posted in Advanced Solving
Tagged AIC, AIC almost nice loops, AIC coloring shortcut, almost nice loop, Medusa coloring
1 Comment