Tag Archives: coloring wrap

Hanabi Without Fireworks


This post reports the ultrahardcore solver solutions for shye’s fifth fireworks example in the forum post  http://forum.enjoysudoku.com/fireworks-t39513.html . It shows the difficulty of the 5th example puzzle and the corresponding value of the fireworks solution. Starting with the common neck … Continue reading

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The UHC 265 Wrap Up


This post continues on the solution path for left page ultrahardcore 265. We begin where we left off, with the two solvers synchronized and with the first preliminary coloring cluster on the grid. Next, a 3 – ANL creates a … Continue reading

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An ultrahardcore 221 ALS AIC Clinic


Continuing a solution path with a finned starfish (5 lines), Beeby carries us through an unlikely  series of ALS aided AIC, dancing around two stalled coloring clusters. The contest ends with regular AIC finally expanding and wrapping the clusters. Here … Continue reading

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Closing Out ultrahardcore 133


Resuming on ultrahardcore 133 after two 1-ways, and a r1 naked pair 16 removing 16r1c3, and the resulting NW naked pair 48 removing 4r3c3.  Solver Beeby finds this ALS node AIC. Starting from 6r2c9, it was a possible exit from … Continue reading

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Krazydad Super-Tough 545 Wraps Up Fast


It’s mostly in Basic with Super-Tough v. 5, b.4, # 5. The post of March 26, 2013 reports a long XY chain, followed by two remarkable irregular XYZ-wings, then two finned swordfish. However, this update shows that the generous bv … Continue reading

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KrazyDad Super-Tougn 515 Starts a Review Update


This post begins the update review of the Super-Tough collection available on krazydad.com with volume 5, book 1, number 5. The Super tough collection was first reviewed in March 2013, but that was one of the first reviews on Sysudoku, … Continue reading

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A Partial Pattern Trial on ultrahardcore 179


This post starts with the 5-panel freeform  analysis to compare with yours and then moves on with the partial pattern trial suggested in the last post, of 8 patterns containing 8r2c9. My 5-panel patterns are much less promising  than the … Continue reading

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Nakamoto Extreme 43 Redefines Sysudoku Extreme


This post recounts another AIC building project of 15 boomerangs, Nakamoto Extreme 43. The Nakamoto Extreme collection justifies the ‘extreme’ label by possibly exhausting the time and patience of a human solver.  Let’s say, if a puzzle justifies a trial … Continue reading

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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

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Lucky Panda 480 Ends the Review


The last review Sudoku of the Lucky Panda Books 500 Sudoku Puzzles, 480, finishes on message with Sysudoku’s choices of bv mining tools, the XY railway and coloring. If you have time for nothing else, you might try your hand … Continue reading

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