I never had a clue how to do Sudoku, looked very confusing. so I sat down and watched about 5 hours of your lessons. I am really enjoying doing these now. thank you for your clear directions and getting me hooked on these now. regards
Hello cool guy. I am prêtty good at sudoku classic. I participated twice in french national championship. I tried to learn sudoku techniques to my friends but was not a good teacher. I sent them on your channel and they improved a lot. Thanks and keep good job. Sorry for my bad english
Hi AbuOmar, Did you know that you can have my english transated to the language of your choice. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ocYLlvrJqKk.html So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
I´ve been struggling with a puzzle for about a month. So i decided to seek help some few days ago and i bumped into your channel. Lucky me! Just watched this lesson, revisited that piece of hell, and managed to break it. Thanks a lot! I´m gonna open a bottle of champagne :-) (No i don´t, just to get an idea of my happiness)
Love your comment Jose. If you have the time look at my tutorials from 20 onwards for more tricks. So glad you found my site."the most popular site on line to learn sudoku" Please tell others and subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. You can view all of my videos here: ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
Hi, really love your videos. Been through all the tutorial of yours. Thanks you. Also, @13:17, the 7 can't go there because there is a 7 at the top (1st Block). I understand that you might have shown this as an example, but I face similar sort of problems when am solving puzzles.
Thanks for the info! this was not a real puzzle but a demonstration. I suggest you look at tutorial 62 and 63 . You will find a better demonstration in a reall puzzle. To find these tutorials go to the link below. So glad you found my site."the most popular site on line to learn sudoku" Please tell others, subscribe and click the bell by the subscribe button. It is FREE. Have fun as you learn step by step how to solve. You can view all of my videos here: ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w ru-vid.com
The x wing is awesome. I sat Ned the video three times until I really understood it. Finished one puzzle using it where I only had half the numbers filled in. Then I did another puzzle marked hard, as I put in all the fours ( and there were a lot of them), I realized I didn't have to fill in everything to go BA k to the fours. So I used the x wing, a d it worked!!!!! I then finished a "hard" puzzle like it was an "easy" one. What an awesome technique!!!! Thanks!!!
You're very welcome! I suggest you look at tutorial #62 and $63 to locate these go below. So glad you found my site."the most popular site online to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. (It’s FREE) Have fun as you learn step by step how to solve. Below is my home page with all the videos listed. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w ru-vid.com www.sudokuguy.com
@@SudokuGuy Thanks for personally replying to my comments and questions--particularly since you have so many more other respondents. It is like having a personal instructor! Thanks, Robin.
Ohhhhhhhhhhhhh, thank you that finally made the light bulb go on in my head. Now, I can see the x wing. Thank you for dumming it down for me. Perfect explanation.
Thank you so much for letting me know that you have understood. Please tell others about my site. Have a great weekend. For a more detailed explanation of the Xwing go to tutorial #62 and ,63
I didn't find this to be an issue prior to lesson 20. But lessons 20 and 21, there are times where due the how you are standing, and the particular camera angle, it is difficult for the viewer to see a the relevant information shown on the board. (I haven't watched any later lessons yet.)
Wonderful! So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. (It’s FREE) Have fun as you learn step by step how to solve. Below is my home page with all the videos listed. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w ru-vid.com www.sudokuguy.com
Thanks! 😃mai. there is much more to learn in the tutorials. See the link below. So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. (It’s FREE) Have fun as you learn step by step how to solve. Below is my home page with all the videos listed. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
Awesome! Thank you Julie. Have you purchased one? So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. (It’s FREE) Have fun as you learn step by step how to solve. Below is my home page with all the videos listed. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
Got stuck on a puzzle with most of the squares still blank. Eventually, I put in all the small numbers because I didn't know what else to do - didn't help. So I looked for an xwing. After a long search I found one and managed to get rid of two small numbers. That was enough - the ramifications of that actually solved the entire puzzle. (Well, I did have all the small numbers)
Set out your puzzle at 7:48 and got engrossed in solving it myself from the starting numbers. I was surprised that the approach I have evolved after watching your early videos seems to be working although I have still yet to spot an X-wing. I have noticed that one can get cycles of numbers which can then be utilised to solve the puzzle along with the "only certain numbers can go in this square" check.
Nice job! Please look at tutorial # 62 and 63. these will help you a lot to understand X wings. To find these go to my channel page to find tutorials. See below So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. By doing so you will be notified by youtube when I upload a new video. (It’s FREE) Have fun as you learn step by step how to solve. Below is my home page with all the videos listed. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w ru-vid.com www.sudokuguy.com
Hi Nancy that is wonderful news. You will find even better tutorials on the x wing (tutorial #62 and 63)Many players have told me that i make it easier to understand. It's the teacher in me I think. Thanks for your support.
It’s really not a full example, at least one of the three columns (1,2,8) would have to allow a six in another row. It would depend on the rest of the puzzle
@@SudokuGuy Does make sense this answer. If we pick first column then we would eliminate the 6s on second column. If we pick second column we eliminate the 6s on first column. Where is the logic behind this decision? Looks like a random choice.
Glad you liked it! Please tell others about my site.There are more videos on the Xwing. Tutorials 62 and 63 explain the Xwing better.. For a list of videos go here: ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w sudokuguy.com
Time stamp 13:30 in the scenario where you need to place a 1,2,3,4,7,8 in column 3, where is the logic of placing the four in row 9? It could logically have also been placed in column 2 row 9. This means it could also have been placed in any other vacant cell in column three.
Hi Henry, yes you are right, however this was a demonstration of a technique not a real puzzle. I should have put 1 other number in row 9 cell 2. You are the first person to note this. Well done.
Thanks Rajan So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
Following all in order and very helpful, I just have one little comment and that is you often block out the left side of the board so we can't see all that is going in x
Sir you picked Wrong 6’s in the very first example …. as there were two sixes at left also with the same base and height …. Please rectify me if i’m wrong 😅 And please provide me free Classes if i am right here (If you want) 😂
Hurd. Please look at tutorial # 62 and 63 as I explain the X wing much better. Yes it was many years ago when I did my first lesson on X wings Have learnt much more since.
Hi, thanks for the lesson 21 und also 20! Ich often want to make difficult sudokus, but mostly in the end there are to much small numbers and I can't eliminate them. Now I know the way to eliminate them! :) Greetings from Steffen from Germany
Fantastic schatten, If you ook at my tutorials from #20 and up you will see how many little numbers can be eliminated. So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. The link below will take you to all of my videos from easy to difficult. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
Thirst of all, thank you for your clear explaining, it helps me a lot! But please don't stand in front of the whiteboard while explaning. We cannot see what you're doing when you stand in front of it. This habbit reminds me of my old math teachers....
You are right , thanks for your comment. In All recent videos I have avoided this. So glad you found my site."the most popular site online to learn sudoku" Please share with others, give me a thumbs up below the video, and subscribe and click the bell by the subscribe button. By doing so you will be notified by youtube when I upload a new video. (It’s FREE) Have fun as you learn step by step how to solve. Below is my home page with all the videos listed. ru-vid.com
Thanks for watching! I suggest you look at tutorial 62,63 as these give a better explanation of the X wing. So glad you found my site."the most popular site online to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. For a list of videos go here: ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w sudokuguy.com
Thanks for the info! If you look at tutorial 62 and 63 you will see a much better presentation of the 2 types of X wings. and how to spot them and what to do with them re solving. So glad you found my site."the most popular site online to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve.You will find all my videos here ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w ru-vid.com sudokuguy.com
36-469 and 169-26 makes a rectangle too. I mean, if we look for a rectangle of '6's there are two of them, not one. So, is it possible that you established a wrong scenerio?
I’ve watched lessons 1-21 and after learning the things from them all I managed to complete my first really difficult puzzle today that I’ve been stuck on for a while. Thanks! One question.. does the xwing rule apply if the numbers are in the rows/columns right next to each other? Hope that makes sense.
But this technique has an error, doesn't it? On the first example, what if the 469 cell is a 4 value and the 68 cell on the top left is an eight. That could be possible and the 6's you deleted, could be the ones needed to complete a puzzle. Which are the rules of this techinique? Can I apply it only when we have 2 candidate numbers in the cell? Or when? Because, it has no sense for me.
Yes it is not a good example. I suggest you Go to tutorial # 62 and 63. I explain it much better. Go to my channel page ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w to see all the examples and explanations of the x wing much better. Robin
At minute. 1:42, I do not understand why you chose the sixes in the second column when you could form the X using the sixes in columns 1 and 8 instead of 2 and 8.
You are both right Watch tutorial # 62 63 for a better explanation. So glad you found my site."the most popular site online to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve.You will find all my videos here ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w ru-vid.com
Hello, But considering this scenario, isn,t the fact because it,s 68 and 68 in column 2, make it a matching pair and therefore the logical reason to chose column 2 instead of 1?
You are so welcome! I suggest you also look at tutorial #62,63. This is a better explanation.. You will find these by going to the link below. Glad it was helpful Karma. So glad you found my site."the most popular site online to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. (It’s FREE) Have fun as you learn step by step how to solve. Below is my home page with all the videos listed. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
Glad it was helpful! I suggest you look at tutorial # 62 and 63 as I give amore detailed look at the X wing. They are not uploaded yet. So glad you found my site."the most popular site on line to learn sudoku" Please tell others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. You can view all of my videos here: ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
Hi Shininglight. So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
Hi Robin, thanks so much! One thing I’m wondering ( probably best seen at 3:01 in)...why didn’t you choose ( for the left side ) the boxes with 36 and 169.... how did you know to pick the boxes of 68 and 69 for the left side please?
good Point I should have only done one set. I did a poor job on this lesson. Look at the tutorials I have done which explain x wings much better.It was early in my sudoku career. Tutoiral #62 and 63 are worth looking at.
Gee Thanks Deepika. So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
thx very useful videos a question in 15,22 you wrote 2 is this result of something or comes from puzzle itself briefly asking ,can we find 2 using logic from original puzle or original puzzle itself already contains 2 ? i have missed this part but everyting ok i know this technique thx your interest
+fatih oğuz Hi faith, I can see why you were confused. The 4X4 scenario did not associate at all with the 2 in block 5. The 2 in block 5 only refers to the senario in block 5 and 8. explained. Hope this helps.
Good question. Using a computer app which allows you to put in all the possible numbers is a form of cheating in that when you do it yourself the correct numbers are your responsibility. Having all the numbers at the beginning can be overwhelming. Doing the first part yourself using snyder notation gives you more satisfaction when you solve it entirely yourself, but it take longer. When you put a number in yourself you then have the opportunity say to yourself what are the ramiciations of this number.So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. (It’s FREE) Have fun as you learn step by step how to solve. Below is my home page with all the videos listed. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
Thanks a lot sir for your amazing method of explanation. I have a question, how could I differentiate between eliminating candidates from rows or columns?
Hello No Sin. if you put some small numbers you may find an X wing, however they are easier to find if you put all possible numbers in empty cells. go to tutorials #62 and 63 for a better description. So glad you found my site. “the most popular site online to learn sudoku” Please share with others, subscribe (FREE) and click the bell by the subscribe button. Have fun as you learn step by step to solve. You will find all of my videos below. sudokuguy.com ru-vid.com
Hi Joe Here are a couple of suggestions. App called "enjoy sudoku" Jason Reinhardt from the app store. and puzzles from tripledot studios (free) These give you pleanty of puzzles to work on. So glad you found my site."the most popular site on line to learn sudoku" Please tell others and subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
Hi Ankur. I am glad you found my site. I am at present working on a new tutorial showing how to spot in detail an Xwing, as I felt my lesson 21 was not as good as it could have been. It will be tutorial #62
Thank you again for another fabulous tutorial. I can't believe that I'm up to the difficult section. Can you recommend a good sudoku book to get? I need to have the book instead of using the apps on the computer. I need to write in the columns. Many thanks again
Cara Letho Hi Cara, I agree you need a book if you wish to add small numbers which is very helpful when you reach the advanced levels. I generally do not recomment books, however I have found that the Will Shortz books have one puzzle per page which makes it easier to put the small numbers in. Another alternative (which is more work) is to photocopy large empty templates of a sudoku puzzle and copy a puzzle onto an empty template.
Cara Letho Oh fantastic!!!!!.... photocopying is a great idea and you can do a batch at a time- I think this is the best option by far. Thank you again for a fabulous site
Hello Robin. I have been working on a puzzle for a day now and it's not working out. Is there anyway I can share that puzzle with you and take your guidance ?
Hi Julie. May I suggest you also look at tutorial #62 and 63. These give a better uderstanding of how to look for an X wing. You will find them here.. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
Hi Zeus. Sorry you did not understand that the top 3 blocks was one scenarion and the bottom 3 blocks was another scenario. they were not connected in any way.ie not a real puzzle but a demostration of technique.
Keep watching A better and more detailed explanation for the X wing is found in tutorial #62, #63 So glad you found my site."the most popular site online to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. For a list of videos go here: ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w sudokuguy.com
Hi parsleybrain, You have a very valid point. Thank you for pointing this out. Yes I should not have had those extra 6's. I have been considering re doing this video for that reason. If you look at the rest of the video the answers are correctt
This is not correct. You have three xwings based on 6 in this example. Column 1 also has two 6s, also making an xwing with column 8. It all depends on whether you choose column 1 or 2 to make your xwing. The outcomes will be quite different. There is also an xwing in 6 in columns 1 and 2. If you choose this xwing, you are going to eliminate the 6s in column 8. You need to get rid of a 6, say the one in column 1, row 8, for this example to work.
So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. You can find all of my videos by clicking on the link below.. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
At timestamp 2:01 I'm asking, "but how did he know to choose THOSE particular cells??!". I'm trying so hard to learn but I'm so dumb now. (Was recently diagnosed with memory and cognitive problems even though I didn't used to be this way: 8 years of college and succeeded through University level calc III with A's and B's.) You have seven columns with numbers in them, why didn't you pick those two columns? I'm really sorry for the stupid questions, I'm just trying to exercise my brain and get better.
Sudoku Guy oh no, I didn't see that what you did was a mistake, I really didn't mean it that way! :( I just mean that I'm really struggling with cognitive problems lately and I just sometimes wish I knew what made people take that first or second or next step while solving Sudoku. I just can't follow the logic. I'm slowly getting better at Sudoku, though. And I have you to credit for a lot of that! :-) I love your videos. I have a friend that can do any level of Sudoku puzzle and doesn't ever ever do pencil marks doesn't know anything about why people put pencil marks and doesn't know anything about all these different methods and strategies. She can just look at a puzzle and over time solve it without any particular methods or steps. I keep asking her for lessons but because she doesn't have any particular method or steps I don't think she can teach me. I think she's just naturally brilliant. I used to be smarter, but even though I'm only in my 40's I'm having cognitive and memory problems that started about a year or two ago. Thank you so much for everything that you do, your videos and your replying to comments. You're awesome! :)
sorry i don't know what you mean by the word 'legends" So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. You can find all of my videos by clicking on the link below.. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
Thanks for your comment. I strongly suggest you go to Tutorial 62, 63. This is where I do a much better demonstration and explanation of the X wing. So glad you found my site."the most popular site online to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. For a list of videos go here: ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w sudokuguy.com robin
It is confusing to us viewers because you "look up" to boxes 1-3 before writing the 9 and 7 in Box 7, as if it is connected (maybe it is a habit). Also, I don't recall you making it abundantly clear they are 2 different scenarios on the single sudoku. You may wish to clarify your video description. Thank you for the otherwise helpful video.
Before this lesson, I was stuck in sudokus that have a minimum of at least 26 clues, I could only do some 24 a few times Now, thanks to the Xwing, I can do my sudokus in half of the time and I'm doing most of the 21 clues without problems
Ps. loved your videos and how you teach things, I started to watch just to see if I could find something that I didn't found by myself, and now in this lesson, everything was worth! Also, isn't easier to start the sudoku by numbers 1,2,3... instead of LMB LCR? I always found more clean to search one number at time in all the 81 cells, at least this way I usually would not miss a ramification and save time.
I think it means if 2 cells can only have a 7 or 8 in each then they become a matching pair. Look at several of my early lessons where I explain matching pairs and the power they have in helping you solve.
So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
in the example where he picked the two sixes from the 68s, the numbers to the left of each 68 included 6s, why not pick those 6s? Was it because of the wo 68s?
jakesprake Hi jakespoke, If I undestand you correctly you have answered your question when you say "was it because of the two 68's. For an Xwing pattern in this case we are looking for a rectangle of sixes. I suggest you look at the video again as this is quite complicated. Each time you look at the video you may understand more. Hang in there. You have done well to reach this level of puzzle.
Sudoku Guy Thanks Roy, you said you're looking for one number which only goes in two places. The two sixes of the 68 are matched up with the sixes of the 469 and the 26. But to the left of the top 68 there are is a 36 and below a 169, could those be used? Thanks.
@@SudokuGuy I am still confused like the others as to why you cannot use the 6's in column one? If you used that then you would get different results because the 6's in column 2 would be eliminated?
I suggest you look at tutorial 62 and 63. This will show you more. So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. (It’s FREE) Have fun as you learn step by step how to solve. Below is my home page with all the videos listed. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
The only thing I can suggest not knowing where you are coming from with your thoughts is to look and listen to the video again. I am working on uploading detailed tutorials about how to spot Xwings There are 2 types. I also show how to spot an X wing in a puzzle. Hang in there. Xwings are hard to spot, but a very valuable tool for solving difficult puzzles.
After watching your video I completed a Diabolical puzzle after finding an Xwing. Thankyou! Assuming then, if you can't find the Xwing(s) then you basically can't complete the puzzle? At www.sudoku.com there are 'expert' puzzles with initially only 18 candidates. I'm assuming they are the toughest and most difficult to complete? Haven't found tougher ones . . .
Hi I don't think there is a mistake. Did you realize that the bottom horizontal blocks is a scneario and has nothing to do with the top 3 horizontal blocks. If this is not the case then please tell me the mistake. So glad you found my site."the most popular site on line to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. (It’s FREE) Have fun as you learn step by step how to solve. Below is my home page with all the videos listed. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
@@SudokuGuy i found two 7s in the 3rd column, or may be you are just teaching the concept,, whatever, You are the best and Im from Nepal, it was great pleasure to hear Nepali greeting 'Namaste' in your video in Lesson-16(i think), so now im following your tutoring videos, a regular viewer and your follower 😊
So glad you found my site."the most popular site on line to learn sudoku" Please tell others and subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w
Go to my channel page Here it is ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w and then look at tutorials 1 -99 Thanks for your interest. So glad you found my site."the most popular site online to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. For a list of videos go here: ru-vid.com/show-UCd8JaOdfEWcJOtwG6YayW0w sudokuguy.com youtube.com@sudokuguy
There are many computer apps but many of them do not offer these. The best way to find answers is to buy a book which has the answers at the back. The problem with answers is that it is easy to cheat. I use answers occasionally if I think there is an xwing to check if my logical answer is correct. Be carefull not to look at other numbers while looking at the answers.
