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Tag Archives: hidden dublex
Closing With the Hidden Dublex
This closing post adds two examples of a fierce looking line marking being de-fanged by hidden dublex on the over abundant X values A double line exclusion, or dublex, is one of the primary moves of Basic sudoku, in which … Continue reading
Can Box Marking Be Extreme?
This post continues the Sysudoku Basic review of Puzzleproof Extreme Sudoku 2, with reports on 70 and 91. In the basic trace of Pzlpf2 70, there is the typical heavy bypass, and collapse in the 9: box marking list. The … Continue reading
FTSPAH 104 and 144
The review of the unspeakable FTSPAH continues with two more puzzles selected arithmetically. The basic trace of FTSPAH 104 is Sysudoku Basic at its best. A near collapse in the bypass is extended by a deferred hidden dublex, which 104 … Continue reading
Posted in Advanced Solving, Basic Solving Procedures, Puzzle Reviews
Tagged coloring wrap, FTSPAH, hidden dublex, hidden pair
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PencilPress 41 and A Well Hidden Dublex
In the review of PencilPress Extreme Sudoku, 41 is a another bypass blow out, with two steep collapses. Tom Sheldon’s Master Class 50 hands you a hidden dublex that is a challenge to spot and verify. We’re reviewing the PencilPress … Continue reading
Systematic Sudoku 