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Tag Archives: color wrap
Funster Extreme 46 Not So Much
The review of Charles Timmerman’s funster Hard to Extreme Sudoku continues with Extreme 46. It’s entertainingly advanced. Extreme 46 has its moments. The basic trace is spread across the page with 3-fill after 3-fill. Two unusual events occur in box … Continue reading
A.D. Ardson’s Sudoku Diabolical
This post begins a brief review of A.D. Ardson’s Sudoku Diabolical, with a review table and analysis of the first of a pre-selected series 30, 70, . . . , 390. Ardson’s Sudoku Very Hard Puzzles, volume 2, very similar … Continue reading
Posted in Advanced Solving, Puzzle Reviews
Tagged Ardson Sudoku Diabolical, color wrap, coloring traps, LM X-wing, naked triple, XY rail
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A Very Hard Finale with Ardv2 398
A hard basic leaves it to an unusual ALS to shake things loose, enabling an XY and a UR to wrap it up. Maybe the hardest of the pre-selected Very Hard. Line marking looks easy, until you look at … Continue reading
Posted in Advanced Solving, Puzzle Reviews
Tagged A.D. Ardson, ALS-XZ, color wrap, Very Hard Sudoku, XY-chain
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More Satisfaction in Saturday 2
This post completes the last hour of the Satisfaction Sudoku tour of Sysudoku, with alternative solution paths beyond the bv scan in Saturday 2. It features a finned X-wing, a coloring wrap, and an alternative freeform pattern analysis with a … Continue reading
An xyt Color Wrap
In the spirit of Valentine’s Day, I come across a coloring resource in Berthier’s xyt chain. The elaboration of Royle 17-20565 in Chapter XVII of The Hidden Logic of Sudoku is a challenge in itself. By the theory of looking … Continue reading
Berthier’s xyt-chains in THLS
Next we review the introduction of xyt-chains in The Hidden Logic of Sudoku. These are modified XY-chains which allow extra candidates in the chain cells, and unlike regular XY-chains, make eliminations regardless of whether the chain starting candidate is true … Continue reading
