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Tag Archives: finned X-wing
Coloring Dominates Very Hard III-15
The review of Moito’s Road to Mastery Sudoku continues with another example of early coloring and its cooperative interactions with the X-panel. The advanced path is similar to that of Very Hard I-35 two posts back, but this time coloring … Continue reading
Cluster Extension by Not-Both Trials
In this post and the next, the first puzzle of the Manuel Castillo Only Extreme Sudoku review, Only Extreme 3, is taken ahead of the review of his Only Hard Sudoku. The reason is in the title. Rounding out the … Continue reading
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 Olive Side of Fata Morgana
This post illustrates with Fata Morgana the practice of taking both sides of a trial, to be sure that a contradiction is found. The pink trial led to the solution. Fully expecting a contradiction, the olive trial begins with the … Continue reading
Posted in Extreme Solving, Monster
Tagged Fata Morgana, finned X-wing, pink olive trial, post solution trial, trial trace
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Finishing More Extreme 200
This post continues, slicing the 9 patterns of More Extreme 200, and conducting trials of the divided sets. A brief, but decisive cluster merge ends the struggle. Antoine was right. #200 is outstanding. Following a pink/olive analysis on the 9 … Continue reading
Gordon Guide Puzzle Review
This post reviews the collection of 700 Frank Longo puzzles following the text in the Gordon Guide to Solving Sudoku. A review table summarizes the Sysudoku rating of 10 preselected puzzles, and one advanced puzzle is analyzed in detail. The … Continue reading
Posted in Advanced Solving, Puzzle Reviews, Sudoku Toolware
Tagged finned X-wing, Frank Longo, Gordon Guide Sudoku, line marking X-wing, XYZ map, XYZ-wing
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Grinding Down Insane 495 with LPO Coloring
In this concluding post on Insane 495, one of two clusters is expanded by several means, including color LPO and a nice loop, merging clusters and reaching a point where an easy trial color wraps it up. Insane 495 is … Continue reading
