dxSudoku

[@urban94]

The additional step to the 3 step way of finding a triple makes it even easier to spot. Thank you for the explanation.

[@dxsudokuchannel]

Another video you might want to look at to help is this one: kzbin.info/www/bejne/aGWtlqp8mt90na8 Understanding subsets is really helpful in finding Hidden Triples.

[@urban94]

@@dxsudokuchannel Yes, that was helpful

[@urban94]

@@dxsudokuchannel Hey, can you please look at this sudoku I'm solving? imgur 00nMfKK (can't post link cause comment gets deleted) I marked the triple candidates with your rules and ruled out the red cells (red crossed out). I'm left with the top 3 cells, where I identified a 369 pair (36, 369, 369) - if this was correct the 1258 cell would be a 1, but it isn't. Can you help me understand why that triple is wrong?

[@tomdalziel4607]

Thank you for this extremely helpful video!! A little Note though: You recommended searching for a Hidden Triplet only in a House having 8 or 9 empty cells, but you did find a Hidden Triplet in a house with 7 empty cells in one of the examples.

[@dxsudokuchannel]

Thank you, glad you liked it. The reason not to look for Hidden Triples in 7 cells is I prefer looking for Naked Quads. I think finding Naked Quads is easier than finding Hidden Triples. But either way, it takes lots of practice. 2-2-2 Hidden Triples and 2-2-2-2 Naked Quads can be tough to find. Here's the video on Naked Quads: kzbin.info/www/bejne/f33XqZ9oecppq7c Also, I did a video on subsets or "wrapping" you might find useful: kzbin.info/www/bejne/aGWtlqp8mt90na8

[@alexanderstelmakh8906]

Thank you for the nice details. Like “remove candidate that occurs 4+ times” It really helps to simplify the process.

[@dxsudokuchannel]

Thanks! One of my better video ideas.

[@WindowsXP_YT]

Hidden Triple at 7:26-10:40 1. Examine this row. 2. These three squares are the only squares that can contain 2, 3, and 4 in this row. Therefore, the other notes in these squares can be erased.

[@dxsudokuchannel]

You are correct. This is the definition of a Hidden Triple. The method in the video is just an aid in helping people see which cells contain a Hidden Triple. Here's another version of the same technique but for cell-phone apps: kzbin.info/www/bejne/i3XKkHqgrrSMl6s You have good Sudoku eyes. If you haven't done already, you need to start looking at AICs. AICs are pretty much a universal puzzle-solving technique. So I end up doing AICs most of time rather than looking for stuff like XY-Chains, Uniqueness Techniques, Remote Pairs, and even X-Chains.

[@SmartHobbies]

Great job explaining the difference between hidden and naked triples and showing how you can look at a 5 cell house and and either see a hidden triple or naked pair. 2 different perspectives on the same underwing logic.

[@dxsudokuchannel]

Thank you my friend!

[@igbertau-yeung4874]

The mark is from 17:14 to 17:30 for R1C5 (candidates 8 9), R1C6 ( candidates 6 8 9), R1C7 (candidates 2 6), R1C8 (candidates 2 6 9)

[@dxsudokuchannel]

I agree, it's a bit confusing. What I am doing is clicking on the 3 x 3 cells in the "Toggle Candidates" area. What is not shown is I kept a copy of what was in each cell so I knew what to click on in the "Toggle Candidates" area. I think I need to redo this part of the video. A better way is once the 4-5-7 hidden triple in R1C123 is identified, it should be written down. And then use Hodoku's undo button repeatedly until there's nothing to undo. Then after knowing the where 4-5-7 hidden triple is located, the candidates that need to be removed from R1C123 could be removed. Again, I apologize for this not being clearer. Conceptually, or logically, the way to think about it is if anything other than 4-5-7 occurs in the cells R1C1, R1C2, and R1C3, the house making up row 1 will be missing a 4, 5, or 7 from the set of values chosen for the 9 cells making up the house (or another number will appear twice, or one cell will be blank). What makes a hidden triple a triple is the 3 identified cells MUST be used for 4, 5, or 7 or bad things happen. I hope this helps. If not, please let me know. I'm currently working on a new video with AIC chaining sequences. But I would definitely do another video just on this way of finding hidden triples if you are interested.

[@igbertau-yeung4874]

Thanks for your patient and thorough clarifications. I can't wait to see your new video of the algorithm for finding Hidden Triples in cell phones.

[@dxsudokuchannel]

It's very close. I was just using the new algorithm on my cell-phone last night. I didn't expect it but I found a triple on the puzzle on I was working on with it. The video should be out this week.

[@dxsudokuchannel]

Here's the new video: kzbin.info/www/bejne/aWSvn4OFiq1pjtE

[@kavithasrinivasan2758]

Another gem of an algorithm to go along with the wrapping concepts these are the best .... I have learnt a lot from you and sudoku Swami videos you guys are the best you guys rock in fact some years back i used to try and solve sudoku for hours but without any success but after watching your videos and sudoku Swami videos i learnt a lot of techniques and now i am able to solve even extreme difficult ones with ease i thank you from my bottom of my heart .....after this algorithm finding hidden triple will become a price of cake to everyone who watches this video and your pre requisite videos

[@dxsudokuchannel]

I'm jealous of Swami's backyard with the river way in the back. He's got an amazing view off his back porch! I live in New Jersey. It's all good! Thank you so much for the positive comments. I have two new Sudoku books coming out soon. I'm waiting on the graphics designer for the new cover and my editor is taking forever this time. My next video will probably be on two puzzles I found. One has a 10-node X-Chain. The other has an 11-Node X-Chain. I think I may have come up with a nifty way of finding puzzles having long X-Chains. This will be a diversion for a week or two for me! After that, I have a Bowman's Bingo video I've been working on intermittently so that one might come out sometime in the fall.

[@yessod7263]

brilliant! thank you for making it clear with your explanation!

[@serendimin]

i’m so sad your last video about triples (#11) was so helpful i thought i finally had an easy way to find these until i came across a puzzle where it didn’t work and now i’ve seen you’ve corrected it and it’s almost impossible to find a hidden triple everything gets eliminated and there’s very few rows/columns/blocks with 8 or 9 open cells once you learn all the other tricks 😢 but thanks anyway this explains it very clearly

[@dxsudokuchannel]

Please post and Imgur pic of the puzzle where you had trouble. I will look at it. You can also post a thread on Reddit and send me a message to dxSduoku and I will look at your post. The finding triple algorithm works pretty well but 2-2-2 type triples can be very hard to find. To be honest with you, when I have a house having 7 open cells, I will always look for Naked Quads before I look for Naked Triples. I did a video talking about how subsets wrap each other and using Naked Quads to find Hidden Triples: kzbin.info/www/bejne/aGWtlqp8mt90na8

[@serendimin]

@@dxsudokuchannel i had 4 empty cells in a row with these possibilities cell 1: 4, 5 cell 2: 4, 8, 3 cell 3: 5, 4, 8 cell 4: 5, 4, 3 and following the old video i eliminated the 4 since it appeared more than 3 times and therefore also eliminated the first cell from consideration for it had only 1 possible candidate left but i didn’t eliminate the 5 from consideration cause the previous video didn’t specify that and therefore i was left with a 83, 85 and 53 triple leaving the 4 as the only possible candidate for cell #1 but as i solved the puzzle with that it turned out to be incorrect and it gave an impossible solution, leaving the 5 as the correct number for that cell (and i made sure to check the solution at the back to make sure i hadn’t messed up somewhere else in the puzzle and everything was correct except for that 4) which is why i came back to rewatch your video to make sure i hadn’t messed up the steps and i don’t believe i did (but please do let me know) and checked the comments to see if anyone was saying this didn’t work for them and saw you redirected someone to this updated version which would disqualify my previous attempt. maybe it would be helpful if you deleted that old video or put in a disclaimer on the title/description as well. thanks for the help!

[@hajarpourghaz]

So much helpful and was perfect, thanks a lot

[@dxsudokuchannel]

Awesome! Glad you liked it. Here's another video that will help you understand triples and subsets in general: kzbin.info/www/bejne/aGWtlqp8mt90na8

[@luispalou217]

Great video, thanks

[@dxsudokuchannel]

Glad you liked it!

[@AGDinCA]

10:06 - marking for my own reference

[@dxsudokuchannel]

Cool

[@AGDinCA]

@@dxsudokuchannel This was an extremely helpful video. Thank you!!

[@dxsudokuchannel]

@@AGDinCA Awesome!! Thank you for the nice comment.

[@igbertau-yeung4874]

I am unable to figure out how you can quickly add back candidates or pencil marks for cells 1,5 through 1,8. If possible, please show the steps in detail. Many thanks.

[@dxsudokuchannel]

At what mark in the video?

[@igbertau-yeung4874]

It would be helpful for all players if you could make another video to clarify the steps. At mark 16:35, you mentioned players are able to use the same steps in cell phone app. For me, I am unable to find the website to download HoDoKu in cell phone. The only one I can find is Andoku which does not provide any available features to execute the steps you mentioned. If possible, please provide the android download link for HoDoKu and also make a video to demonstrate how the steps work in the cell phone app. In the future, I wonder if you could make videos to demonstrate how to play HoDoKu cell phone versions as most people have cell phone available all the time. My other suggestion is to provide playlist links for same category for all your videos so that users can learn all the similar features without searching. For example, under this video to provide links for dxSudoku #7, #8, #11, #25, #50, #51 etc. as they are all related to Triples.

[@dxsudokuchannel]

Hi, thanks for all the great feedback. Hodoku only works on PCs running Java. For cell phones, I would recommend Sudoku Joy for iPhones and Andoku 3 for Android devices are the ones I like. You are correct in saying Andoku does not support candidate level coloring features. I've done a number of chaining videos working with cell-phone apps. So I have a good way in mind on how to do the algorithm for finding Hidden Triples using Andoku or any cell-phone app. So I will do a new video just after my current video is done. You can't play Hodoku on a cell phone as far as I know. You may want to post this question on Reddit (www.reddit.com/r/sudoku/) someone may have done it. I do have a playlist for all my videos on triples: kzbin.info/www/bejne/eHvRlHmmhNiietk&pp=gAQBiAQB Since I got involved with doing Sudoku, I'm always amazed by with just a 9 x 9 grid and a few simple rules there's just so much to talk about!!

[@dxsudokuchannel]

Here's new video on finding triples: kzbin.info/www/bejne/aWSvn4OFiq1pjtE

[@MegaBaror]

Vous beaucoup bla bla pour RIEN

[@dxsudokuchannel]

Merci pour le beau commentaire. Cette façon de trouver les triples cachés est en fait très utile. Bien que je recherche habituellement des triples nus, des quads et même des quintettes. Je les vois juste plus rapidement que de faire des éliminations de candidats.