This was not diabolical! I took a screen shot 8 seconds into it, and 6 minutes later I returned to this video, after solving it. Truly diabolical puzzles have dead ends that require a lot more thought than this one did. But I appreciate that you are trying to teach people how to play this game.

28:50 the most satisfying part when he finally finds the 1and7 🥵

What I got from this video: - He's just plugging away at it - He's normally not this sloppy but he's trying to go fast

Never watched a Sudoku solution before on YT. This was great to get someone else's perspective or approach. I noticed a couple of missed solutions of course but he saw others before I did. No big deal. It is not easy to sustain the concentration over an entire solution while recording for YT. Learned another way today. Big thumbs up and thanks.

Am I the only person that was driven mad that he kept overlooking the 1&7 in the middle box?

Even though it’s frustrating seeing how you keep missing the 1 & 7, but the way you showed how to play sudoku is freaking easy!! Thanks for the time you spent. I’m sure there’s a lot of other videos teaching how to play sudoku, but yours is the first that i had watched. So thanks again. Enjoyed it.

4? Not enough information.... Looks at middle right box that gives him the 4 in ghe middle and cries.

Great video. I have been solving Sudoku for years. I have had many friends ask me how to solve them. When I try to explain how it is done I can see the confusion on their faces. We all have our own patterns and methods we use while solving puzzles that are hard to explain to others. Now I can just tell them to watch this video. Of course those of us who already know how to do these noticed numbers that could have been filled in. But a beginner who is learning for the first time would not notice. He was teaching a technique that he uses. And I think it takes a lot of skill and patience to go through and explain it as thoroughly as he did. More so than just solving it. I never woud have thought that people would comment on it like it was an issue. Thank you for the video.

I see what is making so many people desperate. He is going through ideas all the way through even though there are other factors that make going down that logical path unnecessary. He is not doing it because it is actually necessary, but because he is making examples of ideas that are necessary to solve puzzles of this nature. I picked up two that I was not using before and, if he had not explained the entire idea, I would not have been able to understand what he was talking about and therefore I would not have been able to pick up the technique in question. He is not solving the puzzle the fastest he could, he is showing all the techniques he uses to solve such puzzles so that other people might pick up those techniques. You already knew all of them and you could have solved it faster? I would hope you could. Way to brag about your capacity to complete a logical puzzle and miss the logical point of this video. It is not like he is trying to hide what his purpose is or doesn't even mention it...

I dont know why KZfaq recommended me this, but I really enjoyed this and watched the whole thing without skipping anything. Thanks for this strategy btw, you made me interested in Sudoku again.

What's really diabolical is writing 2 in two different ways.

"Sokath - his eyes open" ! ! ! Your meticulous demonstration with ongoing explanation is the last work in getting across the technique required to do these maddening puzzles. Thank you so much ! I had all but given up on these Sudoku puzzles. Now I'm back on and must say that what you've shown here has made a world of difference. Brilliant ! ! !

guys his detail helped me to fully understand sudoku for the first time. tried to do it on my own many times for years and didn't fully understand it. I am thankful for this video.

Thank you for this very informative video! I hope you don’t let the commenters who think they’re about get the Nobel Prize for pointing out where you simply missed numbers etc, get to you. You’re a wonderful teacher and I hadn’t been exposed to many of these strategies - so thank you again!

It's so satisfying to see all these numbers come together

That's a good job doing it in real time, and I got a few tips for notation I hadn't seen before.

Thanks for the video. No worries about the length. It's educational so it takes as long as it takes.

This guy way going through the steps to take for those that are not used to doing these puzzles, so missing out what is obvious was deliberate to help people understand the various routes that you can take to solve the puzzle, he was giving people a few different methods to solve the diabolical puzzle. Kudos to him and poor show to those of you putting him down for missing out the obvious, he was going through explanations for those who find it difficult to solve these types of puzzles.

This video was really helpful. Thanks for that! However, at 10:50, the end of the 3rd row could have directly been filled with a 2 since a 4 can’t be in the square as indicated by a 4 in cell 1st row 7th column.

The master of sudoku has just solved fantastically a diabolical puzzle showing his extraordinary talent and prowess calling for unstinting accolades from all concerned. Please keep on enriching your sudoku students with the amazing skill of a teacher par excellence.

3:46 you can put the four in right then and there, but nope apparently it's "not enough info"... ok, ok

19:37 no the bottom right box can only be a 1 because there's already a 1 in the middle row of the middle column. THIS TRIGGERED ME FOR THE REST OF THE VIDEO

The pairs technique has really helped me out.

I'm glad I figured out sudoku by myself. If I had tried to learn from this I'd never have started.

AHA!!!!!!

Demonstrates an X-wing without even calling it an X-wing. There's some skill there.

I had to check this out because KZfaq recommends my channel videos to people who liked this one. I enjoyed watching your solving technique, and I think you make the top 7 Sudoku strategies used to solve puzzles like this easy to understand. I'll be checking out more of your content.

Ok now I understand people who watch sports programs on TV

10:43 It can only be a 2, because there is a 4 in that square already.

I think this is one of the most informative videos about Sudoku puzzles, and how to solve them! Not only informs this video about strategies to tackle these things, it also shows to none Sudoku players how they could get into this. Well done MLA! New sub!

Definately, I have learnedq. I was struggling from long years back and i meet no one to teach me at the same time i have huge interest. Thanks a lot. This video opened up my idea

Thanks a lot, I like your method. It’s more structured, I usually only did levels 3/4. But someone bought me a lot of diabolical sudokus, so I decide to try my hand...Totally fail. I used to write all the candidates, it was a little bit overwhelming. I kind of feel like a cheated, by seeing your tutorial lol. But thanks a lot, I was getting frustrated.

32 minutes well spent, I learned a lot about solving sudoku, thank you, thumbs UP

I was stuck at a hard puzzle. Then i came across your video then went back to the puzzle and solved it. I was doing everything wrong lol thank you.

I like your approach and explanations. I would love to see more of your Sudoku teaching!

Thanks. I finally have a pattern that I can use with notes that are neither too few, nor too many, so that I got lost in the data.

Perfect demo and explanation, exactly what I was looking for. I learned a lot, many many thanks!

I do similar but I use dots 1,2,3 top row - 4,5,6 middle row, and 7,8,9 bottom row to indicate the possible numbers in each cell. This Sodoku puzzle was hard, but I solved it pretty fast using my similar method. It's just a different means to the same end. Good trainer though, as this method works on every one I have encountered.

Thank You for posting! I think you're a great teacher, and what a good method. I tried to work the puzzle and hit a few snags. It's nice to watch you explain the different techniques.

You can trigger about the one for a long time, he'll there was a couple that triggered me for awhile but then again we were not the one trying to do a video about it. Thanks for this video, I actually did get something out of it....use a pencil and a felt, box or circle pairs seems to work well. I'll add a pencil to my lunch pail for tonight's puzzle.

thank you, very helpful indeed.

"This is just a diabolical puzzle, you just keep goi... AHA!!!" love your energy

Sudoku ist strangely comforting. Every number added makes the solution expediently easier ♥

Diabolical puzzles cannot be solved using simple process of elimination... That's why they are diabolical... Medium at best

Awesome! I learn some new good tricks! Thanks! :)

great tutorial. Really learned some strategies and you are super easy to follow. Clear explanations. Thanks so much!

I enjoyed watching and learned from you. Thanks a lot.

The 1 in the middle box was clear for more than 10 minutes.

thank you , that was pretty instructive

Fantastic video. Thanks for that, I learned a lot of techniques. I'm stuck on lots of sudoku puzzles in my book. After watching this video I'm going to go back and try them again.

Great job, appreciate your follow through!

You made a mistake @10:39, but it's not that big of a deal as the puzzle book who calls this a very difficult puzzle, as it was rather easy (in terms of problem-solving techniques you needed to use). Overall, you made a great and entertaining video; A great teacher who invites new and advanced players to understand different techniques, which are necessary to solve (hard) Sudokus.

I found myself talking to you! haha. "IT'S a 2! when you missed the obvious one, but easy for me, I'm not teaching it! I really enjoyed it and I do appreciate the video!

After 19:50... I started crying for each 1 / 7 he noted.

There is some good technique in here, he uses Snyder notation and puts emphasis on finding cells that only require two digits. One of the mistakes many beginners make is trying to fill in too many pencil marks in individual cells, making it much more difficult to spot any patterns, which become useful to solving harder sudoku's. Only thing I would change is that when you get a big number then just do a quick LCR and TMB to check the ramifications of the big number. Ignore the people going on about the 1 & 7, we all miss obvious things and you got there eventually.

This was very helpful. Please continue doing the really hard ones because I haven't completely grasped this system. 👍

Nice puzzle, but not difficult. If no swordfish, x-wing or other more advanced techniques are required a puzzle is not difficult, in my opinion. By the way, I find it much faster to go 1 through 9 over the entire board instead of first doing verticals then horizontals. Because when doing verticals I always also look horizontally anyway.

It makes me mad how some people commenting about how easy this is. At one point this wasn't easy for you. You weren't just instantly great at it. Everyone has to learn. This helps the people who aren't amazing at sudoku yet. If you think this is to easy, then look up a different video.

I think actually this video started my sudoku journey like a few years back so yeah I am forever grateful dude!

Use triples to single out numbers when you have 4 unknown numbers in a row or column. For example, you had 1568 as possibility in column 8 at timestamp 11:54. R1 was 168, R2 was 1568, R7 was 18 and R8 was 68. By having the triple for R1, R7 and R8 being that R1 contains R7 and R8, in other words 168 contains 16 and 68, you can determine that 168 can be eliminated from R2 and 5 is the only contender left for R2 since R1, R7 and R8 can only contain the numbers 168.

This was excellent. I was basically taught to go through all the columns and rows first, looking for numbers that can get filled in straight away, as well as pairs of numbers, but after that to start pencilling in all the possible candidates in each unfilled square. This meant that there were lots of little numbers cluttering up the puzzle, making it harder to identify patterns. This chap's approach is much simpler and cleaner and very logical.

I haven't seen it solved with exactly this notation. I'll try it. Thanks from Texas.

Excellent teaching! I've followed all lessons. Was great 2 "Learn" from early lessons (Practice is vital!) These "Hard" instructions r great reminders of tactics! Many thanks

thankyou this is very helpful

I finally get it. Now I can finally smoke my dad at these things. Thank you.

I wrote software in school for years. Solving the most difficult problems always started with hand written attempts, followed by iterations removing steps until one “perfect” set of steps resulted in a universal solution algorithm. I haven’t looked but I’m sure there are sudoku software solutions all over the web. But what fun would that be. Thank you!

This technique is a huge help, im new to these puzzles and I bought a book full of them that was waaay too hard. Thanks! 👍

"AHa!!!!" , I need that on a t-shirt.

Take a shot everytime he says "plucking away" :D

really enjoy your exlaination of solving difficult puzzle Keep them coming!!!!

@ 3:42 "4, not enough information." moves on with a very obvious 4 to be placed in the box.

Whatever comments it may be but he is a good trainer

Neatly explained! thanks looking forward for more

Thank you! I picked up several tips!

That was fascinating! I'm going to watch it again too. Thank you.

This helped me out tremendously! Mahalo! 🤙🏽

When you write down a good number you're supposed to look at the grid to see how that find affects other numbers. This guy doesn't do that.

wow, learned some great new techniques. You made it look easy. Thanks.

Dot from UK Never really grasped the concept of Sudoku but you explain it really well. I think I'll have to watch lots more though of your videos before I'm let loose to do this on my own. Thank you for taking the time to explain and share. Stay safe, lots of love from UK, Dot x

25 clues... it's more of a medium than a "diabolical". I came here looking for a swordfish or x-wing tutorial, guess I overestimated the titles these puzzles are given.

wow! A diabolical sudoku from start to finish. You have a pleasant voice, it's clear and concise. You explain things very well. I'm new to this hobby. KYour videos have helped me the most out of everything out there. Thank you for sharing your knowledge.

That proof was very well done. Doesn't matter that it took that long. We slower ones got to see every move and how you did it. Very helpful - thanks.

Well, I’m grateful for finding another method. Thank you for putting in the time and work.

The missed 1 and 7 on row 6 is making me cringe so much...

That was intensely satisfying to watch.

Thank you so much. Very personable and bright!! 🎶🎵🎶🎵

Genius approach, thanks.

The first time doing the third column he said there was not enough info for the 4 but clearly it can go in the middle of the last column in the middle box

Thanks for this making my 30mins unwasted. Now I have a new hobby. 😂❤

I am no Sudoku expert but from my experience this particular puzzle is by far from diabolical. On the Sudoku app that I use this would be rated as Medium or Hard (at the most)

14:54 FOUR 25:43, 25:55 AHA 28:31 I see you there Satan 28:47 OHHH RIGHT HERE 31:25 "So I'm going to erase this" *does not at all erase this* 32:05 literally 4 numbers left "and now we're getting somewhere"

This was really helpful. Excellent. Thank you for making this.

Congratulations. You just made me love sudoku

Was looking for something to watch, this popped in recommended and I thoroughly enjoyed this! Esp the last few solutions, lowkey got me hype lol 😂

It's actually reassuring to see that I'm not the only one to sometimes overlook really obvious solutions choices for certain fields while concentrating on other parts of the puzzle...

hardly diabolical. not even medium

Thank you. I found your method of noting down the possible solutions in pencil to be very helpful. I always try to keep a mental picture of where they should go but it becomes like a juggling act and I often need to re-figure. So from now on a pencil and a pen will become necessities. An entertaining 32:49.

Dude, I didn't know people actually used corner and center marks when solving sudokus with pencil and paper! i thought those were only Sudoku app things! Cool!

Very helpful! Thanks a lot.

3:43 there were enough information to put no. 4 in the middle box of the right part