![]() ![]() Tarek Posts: 3761 Joined: 05 January 2006Īdding to the strength in location options is the Empty rectangle (which can be viewed as a strong link within a box). I'm looking at hopefully programming these into Sukaku explainer in the near future as "Easier to spot" techniques. I know that using so many terms (as SteveK mentions) is moot, but in a sudoku helper it may be helpful. Adding to the strength in location options is the Empty rectangle (which can be viewed as a strong link within a box). Just a note that Sukaku explainer supports both XY/XYZ wing and L1-wing (Colouring) under the name of "3 Strong links". (Note that I've replaced "candidates" with "digits" and added the corresponding wing-names and strong-link configurations.) 3 strengths in location, 3 digits : 元-Wing : LLL 3 strengths in location, 2 digits : L2-Wing : LLLĨ. 3 strengths in location, 1 digit : X-Chain (L1-Wing) : LLLħ. 1 strong cell, 2 strengths in location, 3 total digits : H2-Wing : VLLĦ. 1 strong cell, 2 strengths in location, 2 total digits : M-Wing / S-Wing : VLL / LVLĥ. 2 strong cells, 1 strength in location, 3 total digits : H3-Wing : VVLĤ. 2 strong cells, 1 strength in location (house), 2 total digits : W-Wing : VLVģ. 3 strong cells, 3 total digits : Y-Wing / XYZ-Wing : VVV / VVĢ. For PC you have a number of them with Hodoku being the foremost but I also enjoy YZF and Xsudo.SpAce wrote: Code: Select all 1. When am searching for WXYZ-Wings I use highlighting searching for the RCC first then build the ALSes from there.įor coloring of candidates there’s only one mobile app that does that effectively and that’s Sudoku Joy. In practice it’s very fast to spot without highlighting. ![]() Now all you have to do is to find within the first block a cell containing Z which is “8” that see the “8s” in ALS A and B! If there’s such a cell you remove the 8 from that cell! With XYZ-Wing you’d be searching for an almost naked pair which is super easy because the form is always fixed! For instance using your example, if there’s a cell containing the candidates where X = 1 and Z = 8. It’s better to see them using ALS-XZ logic. The idea of searching for a pivot and then two pincers is not so good especially when you extend this idea into WXYZ-Wing. It’s super easy! In fact I find it very easy to spot XYZ-Wings than I do for XY-Wings! Using the highlighting tool to find XYZ-Wings is really good but honestly you can find them without highlighting. I think that would be a huge game changer. I have not found a user interface that allows me to color the candidates like is shown in so many solutions. This makes it easier for the eyes to find cells worth considering and excluding cells with more than two values in your scans. For example, make the background of all bi-value cells grey. Rinse and repeat.įor other structures like Y-Wings and XY-Chains, I often highlight the bi-value cells. After the board is scanned, move to the next number - 6 in this case. Now, look around close by for a cell with either 1 and 5 as candidates or 1 and 8 as candidates. Lets say there is a cell with 5 and 8 as candidates. The highlighting of the 5 makes this easy. I then look close by for bi-value cells with a 5. Lets say the cell has 1, 5, and 8 as candidates with the 5 being highlighted. I scan the board looking for cells with three values that include the number that is highlighted. In particular, I’m focusing on the candidates in this case. This will highlight the givens, the answers, and the candidates whose value is 5. XYZ-Wings I find by going through each number and highlighting those cells. All of these assume a fairly robust user interface. Here are some thoughts that are helping me out. I’m developing techniques to help me find Sudoku constructs. ![]()
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