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 Post subject: Stuck on last grid
PostPosted: Mon Oct 09, 2017 8:33 pm 
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This is the final grid in Ruud's Clueless Sumo X (full puzzle here: http://i.imgur.com/Ubu0fa9.png). I've solved all the rest of the puzzle, but I'm stuck on G1:

Code:
.-------------------------------.-------------------------------.-------------------------------.
| 27        3         189       | 6         5         28        | 2789      127       4         |
| 18        24        5         | 249       49        7         | 3         6         18        |
| 6         89        47        | 1         34        238       | 27        257       59        |
:-------------------------------+-------------------------------+-------------------------------:
| 4         6         3         | 5         2         9         | 78        17        18        |
| 5         1         29        | 7         8         4         | 29        3         6         |
| 289       7         289       | 3         6         1         | 4         25        59        |
:-------------------------------+-------------------------------+-------------------------------:
| 2389      289       12        | 29        139       5         | 6         4         7         |
| 37        5         467       | 8         347       36        | 1         9         2         |
| 127       249       467       | 249       1479      26        | 5         8         3         |
'-------------------------------.-------------------------------.-------------------------------'


Richard's SudokuSolver suggests an X-Cycle as the next step, but I don't know what that is--haven't even heard of it before. Ruud was always very conscientious to make all grids of a multi-grid puzzle of similar difficulty, so I find it hard to believe that I'm having this much difficulty with this one grid.


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 Post subject: Re: Stuck on last grid
PostPosted: Tue Oct 10, 2017 12:21 am 
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Nvm. . . Finally got it. I guess I need to learn how to spot X-wings a little better.

By the way, I've never seen an X-wing referred to as an X-cycle. Is that something new?


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 Post subject: Re: Stuck on last grid
PostPosted: Tue Oct 10, 2017 11:40 pm 
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The x-cycle is broad term that refers to chains made up using a single digit. They are usually used after basic techniques are exhausted

tarek


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