Tag Archives: hidden UR 1

Two Solvers Play With UHC 265

Heine’s left page ultrahardcore 265 is solved in two posts. This post follows the alternative methods of the review solvers Beeby and Sudokuwiki until they converge on a long series of AIC in the second post. Here is the grid … Continue reading

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Nakex 183 Hides the Keys

The last review puzzle, Nakamoto Extreme 183, follows the collection’s pattern of hiding easier removals behind methods that are very difficult to spot. An effective defense is to maintain bv maps, X-panels, and coloring clusters carefully as more advanced results … Continue reading

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