Just One More “More Extreme”


This post concludes the Alary More Extreme review puzzles with More 144, Basic marking features a timely naked quad, and advanced solving is another parade of highlights.

more 144 basic trThe basic trace classifies More Extreme 144 as a tough one. I would hate to be faced with the task of starting it with the number scanned candidates. I wouldn’t even want to do it with the grid encrusted with computer generated number scanned candidates. Are you listening, Antoine?

 

more 124 nq gridIf you don’t go through it, I’d like you to see at least the naked quad along the way. Note the long fill strings, loads of candidates, and the few sparse,and therefore promising numbers.

 

 

more 144 fin swordThe bv scan is a bust, but the X-panel offers some promise. The 6-panel delivers a finned swordfish, with one victim in the fin box. All of the kraken victims go free.

Your challenge for the next post is to identify the kraken victims and to show how each of them escapes. A potential victim that sees the fin by any means is eaten by the fish. Forcing chain vision is necessary.

more 144 9-patternsGoing on through the  X-panels, a 9-swordfish deletes all candidates impeding a coloring cluster of two 9-patterns.

If you don’t see the swordfish, look for its victims now missing from the previous grid.

These patterns extend the coloring into the 6-panel. What happens then is LPO magic.

 

 

more 144 6 LPOOne of the two 9 patterns is true. Together, they limit the blue or the green patterns of other numbers. The limits go both ways. The partial 6-patterns allow two blue 6-patterns, and zero 6-green patterns, with freeforms from the left. It’s a pink/olive wrap, in blue and green! Green candidates, and others orphaned by the blue patterns, are eliminated. That’s nine 6-candidates gone!

 

 

more 144 blue ntThe surviving grid sports a naked triple forcing 8r6c1, a fatal wound. If you care to follow it, the autopsy report is below.

It’s time to close the review. Again, I do enthusiastically endorse Antoine Alary’s Extreme Sudoku and More Extreme sequel for advanced level sysudokies.

 

 

It would be nice if we could can the wild claims and honor  good advanced level Sudoku books for what they are.

more 144 autopsy

OK, a promise is a promise. Next time you can compare notes with me on a sysudokie solution of More Extreme 200. You have yours all ready, don’t you? If not, get the book and get busy!

And don’t forget to do your More Extreme 144 kraken homework. Virginia is in high school now, so I had to do the kraken analysis myself. Fortunately the ©Word X-panel template makes it sooo easy. Just copy the numbers in, delete the ones seen by a true victim and it’s confirmed cohorts, and see if the fin survives.

Yeah, I know.  Virginia says that laptops and Office aren’t cool anymore.

 

 

 

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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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