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Tag Archives: Manuel Castillo
Only Extreme 304 Scavenger Hunt
This post finishes the updated review of Only Extreme 304, displaying the Sudoku moves listed last week for the scavenger hunt. The ALS X-chain boomerang starts with the 9-chain emerging from r9c7 and terminating on the 9 candidate of ALS … Continue reading
Only Extreme 304 is AIC Level
This post and the next update Castillo’s Only Extreme Sudoku review with a solution of OnEx 304 without trials. Most of the solution path is in AIC building, the most challenging level of Sysudoku Advanced. The only move prior to … Continue reading
Classic Review Ends,OnEx 261 Escapes Trials
This post traces the bypass finish of Classic 240 and presents the review table for James Forest’s Classic Sudoku. Then it continues the update review of Manuel Castillo’s Only Extreme Sudoku with Only Extreme 261. Demonstrating a solution without trial, … Continue reading
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Tagged AIC boomerangs, AIC seeking level, ALS boomerang, bypass 3-fill, Classic Sudoku, coloring wrap, confirming A, confirming ANL, irregular ANL victim, James Forest, Manuel Castillo, Only Extreme Sudoku, pattern freeforms, pattern orphans, unique rectangle 2b
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Classic 216 Bypassed and Only Extreme 132 Demoted
This post adds another bypass solving to the review of James Forest’s Classic Sudoku, Classic 216. Then a report on an update of the 10/24/17 post on Castillo’s Only Extreme 132, in which a hard, but indecisive not-both trial leads … Continue reading
Only Extreme 390 – a Fitting Finale
In this post, the last preselected Sudoku of the review, Only Extreme 390, is solved by only advanced methods, but by an extremely thin margin. The first crack in the armor is an irregular XYZ-wing. At first I missed an … Continue reading
