This is such a game changer, I'm so used to the classic methods you try. But as soon as the sudoku's become a bit harder you'll have to use these techniques which I didn't know before! I'd love to find more of these informational video's on more advanced techniques!
Funny enuff ... I spotted the 3-5-7 to the left, but went "the other way around": I pencil-marked 3-5-7 in the bottom left box in the only three open positions and thereby got the 4-8-9 triple in column one, which gave a 9 and a 48 pair. Then I of course got the 1-2-6 triple to fill out the column, and I was "off at a smart trot"! (I think that is truly British!) 😊 Just over 25 minutes ... with a little whisky, a pouring cat and Mozart in the background ... I don't go for speed and lean heavily towards logic (like you) compared to fill out all possible candidates or guesswork, brute force or what have you. I have learned soooo much lately: DANX a million for these instructive and inspiring tutorials! I haven't dabbled with anything BUT classical sudoku, so: KEEP'M COMIN'! 😎👍👍
I really appreciate the fact you let us play with the puzzle before you teach. Not that I could finish it or anything, but engaging and becoming familiar with it lets me follow your train of thought much better.
I may be the only one who thinks like this but I like to think of it more like the 3,5 and 7 "slicing" the flank in box 7, forcing a 3,5,7 triplet in the triangle-shaped sets of 3 cells to the right of the flank. This in turn forces a 4,8,9 triplet in said flank which in turn forces a 1,2,6 triplet up in box 1 and 4. Same trick, just a different explanation and way of visualizing it :)
11:24 - My only "cheat" this time was looking at the title and trying to spot said "hidden triple". Got something out of the first column almost instantaneously and everything is good afterwards. This is one of my luckiest fluke solves I think
2:20 why do we know 1, 5 & 8 are forced to be in the 6 positions? i can see that there's a 1, 5 & 8 in the 7th column, but only 1 & 8 are present in column 9. is it simply because we know the 1, 5 and 8 in box 3 are not in row 8, and therefore must exist in the other positions in row 8?
Ditto. I've been pretty familiar with most of your standard techniques up to this point, but this is a new one for me that is already paying dividends. Very much appreciated.
Commenting before view. 19:16. Title was a big help of course. Took me awhile to first find the 126 triple in c1 (since I solve methodically), and it unlocked the puzzle fairly quickly after that.
Wow, this is an extremely powerful logical tool. They don't even have to be "hidden". You can apply the same logic even if you have more than 3 numbers in a 3x3. Learning this technique has seriously upped my game.
13:02 My first time finding one of those hidden triples in the wild! helps that the video title clued me in to looking for it but still really pleased with that time. I was actually extremely surprised when i finished and found i was under 20 minutes!
I am still a relative beginner/intermediate and I'm not good with triples at all, but I think I would spot that pattern - I think it's what my Sudoku coach calls a "cleaver" (an upside down one !) Thanks for the "uniqueness" point at 15:30 - that is something I had not been able to resolve before.
I really enjoyed playing the sudoku in the link. (I started playing the sudoku before you got to the full solution) It took me 49 mins and i came back to leave this comment. Great video! And thanks for the tip about how to eliminate multiple solutions.
Thank you so much! I was stuck in a bad habit of having more numbers than I knew what to do with in my cells. Even with my glasses it was a nightmare. Your method has opened my eyes and helped me out quite a bit. Now I just need to be a bit more detailed so I know to go back and check as you mentioned in the video. I heard about your app and just purchased it. It looks awesome.
VERY persuasive demonstration for the advantage gained by seeking hidden trips BEFORE looking for unique or paired restrictions in 3x3s. Count me as a convert!
11:03 "It's definitely worth getting into the habit of making both types of pencil-marks." That comment was directed at Mark (as well as anyone else who might need it), wasn't it?
Your triple was better, but I was proud of myself for noticing right away a hidden pair in column 7. The given 4 in row 5 combines with the given 2s in rows 4 and 5 to put a 2/4 pair on the ends of the column and a 3/7 pair in the middle. That gives a few digits.
It took me quite a bit longer to solve this one, without using any advanced techniques and interestingly, the digits arrived in almost the reverse order. I've used the "open flank" technique before without knowing what it was called but didn't spot it here. So this was a good reminder, Thank you.
34min18sec Heeey, the second Puzzle I solved since I started watching this channel, and more or less the first because on the one before that I "guessed" 2x... Now I'll watch the video and find out what Simon means with Hidden Triples, of course I used what I learned over the last videos, but I didn't really notice what of the things I found are called "Triples" (maybe all those Pairs?) Just happy that I did it, without the knowledge from the last 20-30 videos that I already watched on the channel, I probably wouldn't have had what are the requirements to solve it (also it can be a bit of a demotivation to keep trying the easier Sudokus on the channel and never quite solving them, so that's a motivation-boost to keep going).
Oh god I'm so bad at these. Took me almost an hour and a half, with several long breaks during which I reflected on my suckitude. Never found a single hidden triple, and it was not for a lack of looking for one. People talking about various 357 triples in the first column/bottom box; what I found eventually was a 48 double in the same spot; maybe it amounted to the same thing? Edit: That 48 double was there from the very beginning! Column one rows 8 and 9. 1, 2 and 6 ruled out by the cell, 357 by the column, and 9 by the rows. Same thing as the people in the comments, same thing as Simon found, just another aspect of it. I don't know why these things are so hard for me to find. Like I said, I looked in several "open flanks", having been introduced to the concept in an earlier video. I think I just gave up too early. Figured I would come back to the idea later and wound up never looking there, at least not in quite that way. Pretty sure I'm going to continue to stink at this. Logic I'm OK at, but pattern recognition is not my thing.
Love the channel. Falling in love with Sudoku. I Like to try the medium and hard NY times puzzle with mixed results. How can I put pencil marks in centrally and in the corners. Thanks for your help. Michael.
Saw that triple in C1, but didn't realize that the 4 was now a hidden single in C2. Once Simon said that I was able to finish the puzzle with a blazing fast time of 45 minutes.
I just realised, the reason why the puzzle setter gives you the 6 and the 1 in the bottom left hand box is to prevent a deadly pattern forming between them and the 6 and 1 in the bottom middle box. It's pretty cool to get an insight into the setter's process, however small 😊
i'm surprised that the first digit i managed to place on the grid 5 u placed all the way at 11:10! :) either way, nice fun puzzle! kinda gave up after a bit, but re-attempted it after watching your explanation "hidden triples" and was able to solve it from there!
That was a fun puzzle. It's cool when I watch the video back and find out that I followed almost exactly the same logic throughout the solve. Unfortunately the logic was at about 1/4 your speed.
like many other commentators I easily seen 3,5,7 and did it opposite of Simon resulting in the triple 3,5,7 trip in the lower left side box So thanks for the flank tip I will now look both ways when crossing that street.
15:45 I have a Sudoku Book where there was a sudoku puzzle that had two solutions and the two numbers were 6 and 8. Just like how you talked about the 3 and the 7 could have been in either spot, the 6 and 8 was just like that in the Sudoku book that I have and it was in either spot that it could be, so that is why I cant rule a number out just in case that happens again to where there is two solution puzzle, and it was a puzzle where if you turned the puzzle upsidedown the start pattern would be exactly the same as it would be rightside up, so not upsidedown.
35:29 with a break in the middle to do a couple things. Probably could have been a bit faster had I not spent time in very beginning trying to find triples.
I'm not particularly great at these, but this puzzle was pretty easy, imo. Started with the 48 pair in the bottom left & the naked single 3 in R4C7. Used 1 x-wing in the puzzle, but otherwise it was all basic pairs & singles. Didn't use ANY triple.
@@Mephistahpheles Yeah, not needed, but I think he used this because when it was sent in, he saw a triple on the left side that easily illustrated the technique. He did say it was an instructional video to help intermediate solvers.
@@alicelaybourne1620 Yup. I certainly appreciate it. As noted, "I'm not particularly great." Every bit I can learn is good. This is pretty much my only source of sudoku education, and I know I'm improving, thanks to Simon, Mark and audience commentary.
Another thing about the first triple found is that automatically there is a 489 triple on the lowest three cells of that column which in itself can easily lead to resolving the nine.
I saw it the other way round: the 3-5-7 in the first column forced their placement in the lower left hand box which in turn meant that the 9 in that box had to go in the first column.
Yeah, the lack of explanation of how the 1-2-6 is "forced" as a triple is severely lacking. The 3-5-7 combo however, *does* force the 1-2-6. I think he has this technique exactly backwards.
You looked at the central box for the first example of a possibly useful hidden-triple. You decided that example wasn't going to be helpful, so you switched to the second example. However, both column two and column three already had a 2 in them, so the '2' for row six is proved to be limited column 8 and 9. So that was somewhat useful. Not as useful as the second hidden triple, but it was a little bit of help.
There are three different triples in this puzzle that accomplished the same thing. Simon's 1,2,6 also the 3,5,7, in the lower box and a naked triple of 4,8,9 in column one row 7.8.9. I also did it on Hudoku with show all candidates. This should always be the case in this situation
Concerning 1,5, and 8, I'm confused with the initial logic. Why can't 5 possibly be in r4,c9 and r6,c9? I can see the rest of the initial assumptions work for the other numbers. Thanks for any help.
"Take a look at the Richard ???? puzzle if you haven't already." Interesting idea. Unfortunately you haven't provided a link as far as I can tell and that isn't enough information for me to successfully search for it.
I used this technique for one puzzle in the Classic Sudoku app. It solved very fast for my standard and after the solve, the app asked if I spotted the two Swordfish that it was designed to train. No I did not. This technique solved it easliy anyway.
LolaMarigold As he pointed out, having a 37 crosspair in this situation would mean that the sudoku would have TWO EQUALLY VALID solutions, which goes against the principle of a good sudoku (imagine solving the whole sudoku, and you could use both combinations of 37 to get a valid solution). We can assume that all published sudokus _do_ have unique solutions, no sudoku creator would publish a sudoku that did not have an unique solution(as far as I know). This brings us to the conclusion that any numbers that goes against the uniquness-quality can be eliminated. Hope this helps!
I always look for triples, and I got the right one, except that the rest of the puzzle took me an hour! He just accelerates at such a blinding speed...
Hi, long time CTC fan. One question I've never asked is why so many key presses on these older videos to enter a single number. Don't get me wrong I actually really like it.
This is such a game changer, I'm so used to the classic methods you try. But as soon as the sudoku's become a bit harder you'll have to use these techniques which I didn't know before!
I'd love to find more of these informational video's on more advanced techniques!
Funny enuff ... I spotted the 3-5-7 to the left, but went "the other way around": I pencil-marked 3-5-7 in the bottom left box in the only three open positions and thereby got the 4-8-9 triple in column one, which gave a 9 and a 48 pair. Then I of course got the 1-2-6 triple to fill out the column, and I was "off at a smart trot"! (I think that is truly British!) 😊
Just over 25 minutes ... with a little whisky, a pouring cat and Mozart in the background ...
I don't go for speed and lean heavily towards logic (like you) compared to fill out all possible candidates or guesswork, brute force or what have you.
I have learned soooo much lately: DANX a million for these instructive and inspiring tutorials!
I haven't dabbled with anything BUT classical sudoku, so: KEEP'M COMIN'! 😎👍👍
Same (also with cat), but took 40 minutes. Nice to have learned to look out for this trick now!
I did it, I did it, I really did it. Took me 2 hours, but I did it.
i'm about an hour in and came to the comments for help. About to watch the video. I'm stuck. lol.
Your comment encouraged me to keep going when I felt stuck at around 1 hour in and managed to solve it in 1,5 hours!
I really appreciate the fact you let us play with the puzzle before you teach. Not that I could finish it or anything, but engaging and becoming familiar with it lets me follow your train of thought much better.
13:28 "And now we are starting to cook with gas". I didn't realise that people still said this. Nice one!
I may be the only one who thinks like this but I like to think of it more like the 3,5 and 7 "slicing" the flank in box 7, forcing a 3,5,7 triplet in the triangle-shaped sets of 3 cells to the right of the flank. This in turn forces a 4,8,9 triplet in said flank which in turn forces a 1,2,6 triplet up in box 1 and 4. Same trick, just a different explanation and way of visualizing it :)
Excellent tutorial! Many thanks.
I like this video and how you took extra times to explain the triple. Very helpful!
I made too many errors, was trying to race ahead and use your tutorial as a foundation. Please do more of these remedial videos
11:24 - My only "cheat" this time was looking at the title and trying to spot said "hidden triple". Got something out of the first column almost instantaneously and everything is good afterwards. This is one of my luckiest fluke solves I think
Thanks!
Thank you very much!
Mark, you are an excellent teacher.
I feel stupid. Simon, I apologize. You are an excellent teacher. TheWtfness, thank you for the correction.
2:20 why do we know 1, 5 & 8 are forced to be in the 6 positions? i can see that there's a 1, 5 & 8 in the 7th column, but only 1 & 8 are present in column 9. is it simply because we know the 1, 5 and 8 in box 3 are not in row 8, and therefore must exist in the other positions in row 8?
10:03! Very clean puzzle, the 357 in the first column unlocked it for me.
Before I wasn't good with spotting hidden triples. Thanks to your channel. I was able to improve my scanning skills.
My time is 15:11.
Simon, you are a great teacher, thank you for these break-down videos.
Holy cow. That was an excellent tutorial. 17:43... New technique learned. Thanks and truly appreciated
Ditto. I've been pretty familiar with most of your standard techniques up to this point, but this is a new one for me that is already paying dividends. Very much appreciated.
Did it with you in the beginning! Until i got up and running on my own. 27:37! Best time so far!
Commenting before view. 19:16. Title was a big help of course. Took me awhile to first find the 126 triple in c1 (since I solve methodically), and it unlocked the puzzle fairly quickly after that.
25:50 yay, really get a kick out of doing these on my own. Need to keep going.
It it fun to have you show the new trick, then pause and go solve the puzzle. I was really stuck before you showed the 1/6 triple on the left.
25:43 Finally was able to finish one again. I only used triples once i think, but did have a lot of doubles
Wow, this is an extremely powerful logical tool. They don't even have to be "hidden". You can apply the same logic even if you have more than 3 numbers in a 3x3. Learning this technique has seriously upped my game.
13:02 My first time finding one of those hidden triples in the wild! helps that the video title clued me in to looking for it but still really pleased with that time. I was actually extremely surprised when i finished and found i was under 20 minutes!
I am still a relative beginner/intermediate and I'm not good with triples at all, but I think I would spot that pattern - I think it's what my Sudoku coach calls a "cleaver" (an upside down one !) Thanks for the "uniqueness" point at 15:30 - that is something I had not been able to resolve before.
Very useful tip. I will be mindful for these hidden clues for the future.
26:10 It might be the first time I've finished a Times puzzle without watching your solve
Excellent tutorial! This tip is a game changer.
I really enjoyed playing the sudoku in the link. (I started playing the sudoku before you got to the full solution) It took me 49 mins and i came back to leave this comment. Great video! And thanks for the tip about how to eliminate multiple solutions.
Something very useful to look for, which is both easy to spot and easy to remember. Thanks!
Corner pencil marks: show which cells could have specific number
Center pencil marks: show which numbers could be in specific cell
Thank you so much! I was stuck in a bad habit of having more numbers than I knew what to do with in my cells. Even with my glasses it was a nightmare. Your method has opened my eyes and helped me out quite a bit. Now I just need to be a bit more detailed so I know to go back and check as you mentioned in the video.
I heard about your app and just purchased it. It looks awesome.
48 MINUTES, so happy. first time to complete a NYT hard in under an hour :)
Got it in 21 minutes, but probably would've taken longer if I hadn't thought about the title of the video for a moment. Awesome puzzle.
VERY persuasive demonstration for the advantage gained by seeking hidden trips BEFORE looking for unique or paired restrictions in 3x3s. Count me as a convert!
Several great advanced techniques in this video! Thanks!
11:03 "It's definitely worth getting into the habit of making both types of pencil-marks." That comment was directed at Mark (as well as anyone else who might need it), wasn't it?
2nd try - did it in 25 minutes. Delighted!!
Your triple was better, but I was proud of myself for noticing right away a hidden pair in column 7. The given 4 in row 5 combines with the given 2s in rows 4 and 5 to put a 2/4 pair on the ends of the column and a 3/7 pair in the middle. That gives a few digits.
It took me quite a bit longer to solve this one, without using any advanced techniques and interestingly, the digits arrived in almost the reverse order. I've used the "open flank" technique before without knowing what it was called but didn't spot it here. So this was a good reminder, Thank you.
34min18sec
Heeey, the second Puzzle I solved since I started watching this channel, and more or less the first because on the one before that I "guessed" 2x...
Now I'll watch the video and find out what Simon means with Hidden Triples, of course I used what I learned over the last videos, but I didn't really notice what of the things I found are called "Triples" (maybe all those Pairs?)
Just happy that I did it, without the knowledge from the last 20-30 videos that I already watched on the channel, I probably wouldn't have had what are the requirements to solve it (also it can be a bit of a demotivation to keep trying the easier Sudokus on the channel and never quite solving them, so that's a motivation-boost to keep going).
Excellent tutorial!
Oh god I'm so bad at these. Took me almost an hour and a half, with several long breaks during which I reflected on my suckitude. Never found a single hidden triple, and it was not for a lack of looking for one.
People talking about various 357 triples in the first column/bottom box; what I found eventually was a 48 double in the same spot; maybe it amounted to the same thing?
Edit: That 48 double was there from the very beginning! Column one rows 8 and 9. 1, 2 and 6 ruled out by the cell, 357 by the column, and 9 by the rows. Same thing as the people in the comments, same thing as Simon found, just another aspect of it. I don't know why these things are so hard for me to find. Like I said, I looked in several "open flanks", having been introduced to the concept in an earlier video. I think I just gave up too early. Figured I would come back to the idea later and wound up never looking there, at least not in quite that way.
Pretty sure I'm going to continue to stink at this. Logic I'm OK at, but pattern recognition is not my thing.
You are VERY instructive. Many thanks.
Love the channel. Falling in love with Sudoku. I Like to try the medium and hard NY times puzzle with mixed results. How can I put pencil marks in centrally and in the corners. Thanks for your help.
Michael.
New technique for me. Thank you very much.
13:29 and I'm proud. Thanks for the excellent explanations :)
Very helpful and well explained. Thank you.
Saw that triple in C1, but didn't realize that the 4 was now a hidden single in C2. Once Simon said that I was able to finish the puzzle with a blazing fast time of 45 minutes.
I just realised, the reason why the puzzle setter gives you the 6 and the 1 in the bottom left hand box is to prevent a deadly pattern forming between them and the 6 and 1 in the bottom middle box. It's pretty cool to get an insight into the setter's process, however small 😊
Great tip. It's not something I look at normally.
Nice technique, seems so simple. I hope you create more videos like this one.
Learning new technique is very helpful
Would it be possible to make a video explaining the different types of "triples" as I still cant get my head around it
28:46, making progress!
i'm surprised that the first digit i managed to place on the grid 5 u placed all the way at 11:10! :)
either way, nice fun puzzle! kinda gave up after a bit, but re-attempted it after watching your explanation "hidden triples" and was able to solve it from there!
First one of these I've managed to do all by myself!! 😄
That was a fun puzzle. It's cool when I watch the video back and find out that I followed almost exactly the same logic throughout the solve. Unfortunately the logic was at about 1/4 your speed.
37 minutes! But I needed Simon to show me the hidden triple first.
45 and same
I learned something today! Today is a good day.
Very helpful. Thank you.
like many other commentators I easily seen 3,5,7 and did it opposite of Simon resulting in the triple 3,5,7 trip in the lower left side box So thanks for the flank tip I will now look both ways when crossing that street.
15:45 I have a Sudoku Book where there was a sudoku puzzle that had two solutions and the two numbers were 6 and 8. Just like how you talked about the 3 and the 7 could have been in either spot, the 6 and 8 was just like that in the Sudoku book that I have and it was in either spot that it could be, so that is why I cant rule a number out just in case that happens again to where there is two solution puzzle, and it was a puzzle where if you turned the puzzle upsidedown the start pattern would be exactly the same as it would be rightside up, so not upsidedown.
Another easy one for a confidence boost. Mucho Burundi
Ah, yes really easy one, just one pair & rest was singles.
very helpful thanks
Great tips!
Nice. Thank you.
35:29 with a break in the middle to do a couple things. Probably could have been a bit faster had I not spent time in very beginning trying to find triples.
I'm not particularly great at these, but this puzzle was pretty easy, imo. Started with the 48 pair in the bottom left & the naked single 3 in R4C7.
Used 1 x-wing in the puzzle, but otherwise it was all basic pairs & singles. Didn't use ANY triple.
@@Mephistahpheles Yeah, not needed, but I think he used this because when it was sent in, he saw a triple on the left side that easily illustrated the technique. He did say it was an instructional video to help intermediate solvers.
@@alicelaybourne1620 Yup. I certainly appreciate it. As noted, "I'm not particularly great." Every bit I can learn is good.
This is pretty much my only source of sudoku education, and I know I'm improving, thanks to Simon, Mark and audience commentary.
Another thing about the first triple found is that automatically there is a 489 triple on the lowest three cells of that column which in itself can easily lead to resolving the nine.
Took me 3:58 after importing and building the candidate list. Nothing harder than a few X-wings, but still a nice puzzle!
At 10:21 how did you get to placing 3 there?
Another great lesson
Where can I find the Richard Stolk puzzle, pls?
I saw it the other way round: the 3-5-7 in the first column forced their placement in the lower left hand box which in turn meant that the 9 in that box had to go in the first column.
Yeah, the lack of explanation of how the 1-2-6 is "forced" as a triple is severely lacking. The 3-5-7 combo however, *does* force the 1-2-6.
I think he has this technique exactly backwards.
Found the triple using 357 on the first column. Took just about 10 mins.
You looked at the central box for the first example of a possibly useful hidden-triple. You decided that example wasn't going to be helpful, so you switched to the second example. However, both column two and column three already had a 2 in them, so the '2' for row six is proved to be limited column 8 and 9. So that was somewhat useful. Not as useful as the second hidden triple, but it was a little bit of help.
There are three different triples in this puzzle that accomplished the same thing. Simon's 1,2,6 also the 3,5,7, in the lower box and a naked triple of 4,8,9 in column one row 7.8.9. I also did it on Hudoku with show all candidates. This should always be the case in this situation
41 minutes 56 seconds. Not bad for me. THanks for the tips.
Hi, is there an Android app which allows centre marking? Is your app software available on Android? Thanks and 👍 for the great videos.
31:08, which is pretty good for me!
I've been trying to do the NYTimes hard puzzle every day lately, today's was no trouble but this one I struggled through quite a bit
Concerning 1,5, and 8, I'm confused with the initial logic. Why can't 5 possibly be in r4,c9 and r6,c9? I can see the rest of the initial assumptions work for the other numbers. Thanks for any help.
Indeed, and also r7c9
@@jurjenvanderhoek316 Yes that looks true too. So why the statement 1, 5 and 8 are locked into the middle column?
5 actually IS in r4,c9. He misspoke. The actual triple is the 162 in c1.
Because column 8 must have a 1, 5 & 8 in it, but they can't go in box 3
01:36:06 solved 👌
"Take a look at the Richard ???? puzzle if you haven't already." Interesting idea. Unfortunately you haven't provided a link as far as I can tell and that isn't enough information for me to successfully search for it.
Apologies, I think there is a Card at the beginning of the video. It's this puzzle:ua-cam.com/video/9D52vymi_v8/v-deo.html
sir this is great. thank you so much.
Simon - Sudoku is physically demanding .. proper hydration and electrolytes can cut down on cramping (winking emoji)..
Magnesium tablets'll do it
I used this technique for one puzzle in the Classic Sudoku app. It solved very fast for my standard and after the solve, the app asked if I spotted the two Swordfish that it was designed to train. No I did not. This technique solved it easliy anyway.
33:19 on the second attempt - I got some 2s and 4s scrambled the first time around!
Nice tutorial! 17 mins for me
At 16:00 you rule out the 3's and I still can't get my head around why. Is there a previous lesson that can explain it better?
LolaMarigold As he pointed out, having a 37 crosspair in this situation would mean that the sudoku would have TWO EQUALLY VALID solutions, which goes against the principle of a good sudoku (imagine solving the whole sudoku, and you could use both combinations of 37 to get a valid solution). We can assume that all published sudokus _do_ have unique solutions, no sudoku creator would publish a sudoku that did not have an unique solution(as far as I know). This brings us to the conclusion that any numbers that goes against the uniquness-quality can be eliminated. Hope this helps!
I always look for triples, and I got the right one, except that the rest of the puzzle took me an hour! He just accelerates at such a blinding speed...
The part where you do a big chain solve in a row was fun
Hi, long time CTC fan. One question I've never asked is why so many key presses on these older videos to enter a single number. Don't get me wrong I actually really like it.
How can one tell that at 17:26, the matching 16 pairs in the top left and middle boxes don't form a deadly pattern?
The other solution would change which columns the 1 and 6s end up in.
Thank you.
loved it
thank you for the help
I do like Uniqueness patterns. I’ve been solving some challenging Masyu puzzles that rely on uniqueness to solve them.
kakuro too, I use uniqueness there a lot!
Simon is already incredible at Sudoku but if you watch this on 2X he is an ABSOLUTE GENIUS!!!!!
You only need to spot the triple in column 1, bottom left box, gives the 357. Then the rest falls into place. Took me 14:46 before watching the video.