-
Recent Posts
Recent Comments
Archives
- 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
Meta
Tag Archives: iXYZ-wing
Reviewing James Forest’s Classic Sudoku
This post presents a Sysudoku solution of the Classic 24, from James Forest’s Book 30. We’ll do every 24th Classic. The first suggests an easy basic and an interesting diversity of advanced methods. The bypass fills the East boxes with … Continue reading
Posted in Advanced Solving, Puzzle Reviews
Tagged finned swordfish, Forest Classic, irregular XYZ, iXYZ-wing, UR type 2b
Leave a comment
A funster Extreme 116 Labor Day Special
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
Pattern Coloring Not-Both on Only Extreme 261
On this post of the Manuel Castillo Only Extreme review, Only Extreme 261 justifies its “extreme” label. After limited advanced moves, a pattern based coloring suggests an extension via a not-both trial on a long AIC strong link. The not-both … Continue reading
Almost Extreme 175 Tags Five Advanced Bases
This post reaches the halfway point in the review of Manuel Castillo’s Only Extreme collection, with Only Extreme 175. A double UR, a regular Sue de Coq and irregular XYZ-wing prepare the bv field for coloring, and an XY chain … Continue reading
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
Mike Peterson’s Very Hard Sudoku, v.1
Resuming posts after a quiet summer, this review identifies the title book as a basic level collection, offering an interesting challenge for the slink marking bypass, and little else. The brief introduction offers interesting historical facts, but is another example … Continue reading
Posted in Advanced Solving, Basic Solving Procedures, Puzzle Reviews
Tagged iXYZ-wing, Mike Peterson, Very Hard Sudoku, XY-chain
Leave a comment
The Nastiest Ever Party II
This post displays some sysudokie snapshots from Nastiest 618, 640 and 651, The bv scan rules, with line marked fish, unique rectangles, Sue de Coq, XYZ-wings, and XY-chains. A Sysudoku technique formerly rated extreme gets to stop for a drink. … Continue reading
Posted in Advanced Solving, Longo, Puzzle Reviews
Tagged Frank Longo, iXYZ-wing, Nastiest Sudoku Ever, Sudoku bv scan, Sudoku coloring, Sudoku Sue de Coq, sue-de-coq, UR, XY rail, XYZ-wing
Leave a comment
