Almost Extreme Bean ExHdv10 II-29


Here we have a regular XYZ wing with two irregular victims, multiple coloring clusters and wraps, one, by an AIC almost nice loop. Rebecca Beam’s Extremely Hard v.10 II-29 is borderline extreme.

Basic is tough, but routine.

 

Except for the 4-wing as line marking begins.

 

Line r7 was filled in box marking with a match occurring on the r2, the first line marked. The wing fins stay in place as the remaining lines are marked, prohibiting the entry of 4’s in columns c2 and c6. To report what happened, I put them in and mark them as removed.

 

 

The 4-wing removal enables two naked triples, one in the North box and one in c6. The latter triggers a 9-boxline, and a 67 subset in c4.

 

 

 

 

 

 

The growing bv field produces a rectangular XYZ-wing, which yields nothing to unit winks. Here two victims look around the ER corners to see two of the three members of the wing’s toxic set.

 

When a target is suggested, you can often construct a chain to see it.

With coloring, II-29 begins to  look more extreme.  Coloring breaks the bv into three disconnected clusters. When AIC hinges are added, an AIC ANL wraps orange with a trap in r2c7.

 

 

 

One wrap leads to another, and another, in the collapse of Extremely Hard v.10 II-29.

 

At this point I’ve completed the remaining review puzzles, and can share the review table for Rebecca Bean Extremely Hard v.10 with you.

Next is one of the two Sysudoku extreme rated puzzles of the ExHd v. 10 review, way down at a Moito rating of 0.93.  It is VI-24. From me it demanded coloring trials. Maybe you can do it straight up. Notice how I’m assuming the Moito and Bean ratings are the same. Where’s the explanation of either or both?

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About Sudent

My real name is John Welch. I'm a happily married, retired professor (computer engineering), timeshare traveling, marathon running father of 3 wonderful daughters and granddad to 7 fabulous grandchildren. The blog is about Sudoku solving. It covers how to start, basic solving to find candidates efficiently, and advanced solving methods in an efficient order of battle. It is about human solving methods, not computer solving.
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