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Tag Archives: XYZ-wing
A Timely Finned Fish in funster Extreme 88
Continuing the review of Charles Timmerman’s funster Hard to Extreme Sudoku, with Extreme 88. The basic compensates for a modest bypass with a favorable line marking. A naked single early and a finned 2-wing late. Finned fish is a topic … Continue reading
Only Extreme 132 Is Cut From the Extreme Team
Another example of expansion of a limited coloring network via the not-both test on an AIC slink. It’s an extreme tactic that need only be tried as a last resort. While the expansion does work in OnEx 132, it is … Continue reading
Only Not Extreme 46
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
The Limited XYZ-wings of THLS
The XYZ-wing is limited in The Hidden Logic of Sudoku, as it generally is in Sudoku literature, by a limited conception of the weak link. This post presents a resolution of Royle 17-12407 using an iXYZ-wing, a form of the … Continue reading
CLEF Homework on Unsolvable 190
Here is a checkpoint Sysudoku reader’s homework on the Sysudoku Cross Line Exocet Filter introduced in the previous post. Was it hard? I stumbled many times on the 3467 case of the last week, and I may need corrections on … Continue reading
Posted in Extreme Solving, Monster
Tagged CLEF, Cross Line Exocet Filter, exocet trials, remote pair, UnSolvable 190, XYZ-wing
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Longo’s Nastiest Ever After
This post finishes the illustrative review of Frank Longo’s The Nastiest Sudoku Book Ever, with review puzzles 673, 684, 695 and 706. The bv scan and occasional easy coloring continue to be enough for what Frank claimed to be the … Continue reading
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
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