@@jackeyniraula You'll get a hang of it. It's mostly logic and finding patterns. Practice on a lot of easy Sudokus at first. This will train your brain to find the missing numbers in a row, column and block without counting. Then go slowly to the harder ones. Watch Simon's tutorials. He explains the logic behind every technique in an easy to understand way.
When Mark said pause, I spotted a naked 5 without even having to pencil anything in. Similar strategy to Mark's - I looked at cells with longest lines of intersecting digits and found that in box 9 the cell to the left of the 9 can only be a 5. Admittedly, that 5 placement doesn't seem to open up the puzzle much so eventually, the 2 on the third box would have been required.
One tip that I've picked up from watching these is to train yourself to occasionally scan the numbers in the rows and columns, looking for places where lots of different numbers overlap. Those are often places worth looking at more carefully. R8C7 is a perfect example. If you scan the board you can see quickly that C7 has 2347, R8 has 3689, and 1 is in the box. So bam, you've just found a naked single 5. Also look carefully at houses that have only a few empty cells, and make a note of what's missing from them. e.g. C5, which starts out with 5 digits given, leaving just 1238 to go. After checking the overlapping houses, while there are no singles out of the gate, you have already found two bi-value cells.
Great tip - “sometimes you have to switch to cell thinking”. I often find these videos hard to follow because he goes so fast, but THIS was a truly brilliant tip. Thank you!!
OHHH I CAN SEE NOW WHY 2 WAS THERE Look at the row and column where 2 was 5, 7, 3 was at the left so you cant place em anymore 6, 9 was at the bottom of it so you cant place these numbers too 4, 8 was at the box so you cant place em anymore 1 and 2 are the only choice left 1 is about to be placed there! Making 2 the only number left! Thx Cryptic
nichol dsouza I also didn’t ask for ur opinion again... see where this is going? This is what happens when you say you didn’t ask for someone’s opinion when they never asked for urs
Just started sudoku 3 days ago with an app from boredom (and cause of memory issues), but the fastest I managed to solve an Expert puzzle (1 block with 6 empty cells and only around 1-3 numbers in blocks max) was 14 minutes, and ever since that 1 lucky time it takes minimum 22 minutes! my strategy of writing down every single possible number is definitely not working lmao. Definitely gonna check more of your videos out as I never thought of keeping it this plain, page wise!
Very helpful method. IF you couple your method , while at the same time keeping an eye out for hidden pairs, it REALLY speeds up the process. I found several hidden pairs right away
how exacly did he decide there can only be 2 in that place? cuz from what i can see in that line there are 3 more posibbilities of 2 being somewhere else
@@allmightsmaaash1082 It's not a case of "The 2 in the box can only go in this cell". It's the other way around - "I can't put 1, 3, 4, 5, 6, 7, 8 or 9 in this cell, so the only thing left for it to be is a 2".
This has been one of the most helpful sudoku videos I have ever seen. Many thanks for your help! I don't understand why your ideas are not taught more generally. Hope you make many more videos.
Without the need for the ones in the top right box, bottom right box also has a naked single below the 7 in column 7, row 8. It's a 5. It sees 1, 7 and 9 in it's box, 2, 3 and 4 in the column and (3), 6 and 8 in the row so the only possibility is 5. I didn't spot the one Mark did in the top box, though.
I did this without notations. It took me a very long time: 38 minutes ! I found a naked 5 in box 9, at r8c7 and thopught there was some light at the end of the tunnel, but no such luck. Then I finally took a look at row 2 and found the naked 2. This was what was needed. Fun puzzle.
ummm, not always. I love to time myself. it adds a bit of a challenge and keeps me on track. I get distracted easily so timing makes it extra fun. But yeah, finishing is important but not the only importance to sum (pun... lol)
Column 7, numbers 1,5, 6, 8, 9 missing. Position 8 in this column has to be a 5 since 1,9, 8, 6 are ruled out. This is the naked single. I think the 2 that Mark had found in column 8 is called a hidden single.
The first number i found was a 5 in row 8 column 7. If I identify a cell where a number cannot be I mark it with a dot in the appropriate spot, eg top left for a 1.
I will say this one is a very nice example of the power of that 2 cells notation. Together with the scanning for cells that can only hold a single digit you have a real good puzzle for people just getting into sudokus and these two techniques.
In my month or so of following this channel and playing some of the games, I've realized that Snyder notation is very good for most traditional sudoku games, but it also tends to make some of the more complex puzzles and techniques harder. The main problem with it is that logic techniques that rely on elimination and spotting broader patterns don't stand out as much. In particular, patterns like x-wings/fish are hard to locate, as they rely on noticing exactly which, where, and how many candidates exist in certain columns and rows. I guess in the end you need to learn how to balance the use of Snyder and traditional cell-based notation, and when to switch between them.
It took me twelve minutes to solve the entire puzzle, which for me is fairly quick. But I never stalled out. Then again I was working on paper, which means I annotated a lot.
I found several “naked singles”, some needed the highlighted technique. A video on spotting chaining would be most welcome. Your ability to spot them is uncanny.
I don't have link to play it, so would have to use a hand drawn grid. My start point would be a single 5 in C7 - that with3 & 7 as well as the 3, 5 & 7 in R2 gives those numbers as a triple in block 3. That means that 2 has be be in R2 of block 3, and places itself in R1C3. R2 becomes a single 8, the 7 goes in R3C1, and that gives 2 more 7s around the grid, and at least one 2 follows also. Now I'll watch, and my next number when the question came u is R8C7 = 5, and that wasn't the answer which was 2, a number I would have found a couple of moves later.
At 2:46 we can straight away fill in 8 in 2nd row and 3rd column as in the first block there are 6 nos missing, all the other numbers are either present in the column we put 8 or in the row, so we had 2 possible values that is 2 or 8 but 8 cant be in 1st row 3rd column therefore 8 is in 2nd row 3rd column, now you can solve it under 7 or 6 mins!
Would this help solve very hard sudokus First with your grid problem in the memory you fill in the empty cells starting with 1’s in the corner in the row and column and progress to 9’s in the other corner and then reverse the process. However you must leave a cell blank if the number your supposed to fill is already in the sub grid or in the row or column of the cell your filling in. You should be left with some empty cells. Deducing from the numbers in the row column and sub grid check if the empty cell has one number not accounted for and if the number of empty cells in the row column and sub grid is even fill in the cell with that number. Clear all cells that were filled in with the 1-9 scheme. The cells left newly filled in should be correct. Now Use a basic deductive method and go as far as you can with that and if you need to repeat the process once more. O n
Been playing Sudoku for some time now and yes the hard puzzles took me time to figure out also but this technique has opened up my eyes more 😎. Thanks mate.
I saw a naked single number 5 on the 2nd row from the bottom (unless I got it wrong), nearly immediately from a trick Simon explained once but then I still don't easily know where to go from there. I really have to get more practice I guess.
how exacly did he decide there can only be 2 in that place? cuz from what i can see in that line there are 3 more posibbilities of 2 being somewhere else
Now that you've seen it maybe you can spot them in the future. I didn't get the naked single on my own. It definitely helped. It at least reminds us to be aware of this and keep an eye out.
The hell of a long time? Eight minutes?? Man, you've no idea what a long time is! I normally solve difficult puzzles in - oh I don't know - five to ten minutes, maybe - occasionally much faster, though. But I have one that I've spent years on NOT solving! I had a Nokia telephone once (who didn't?) with 100 puzzles on it. The first 90 were ridiculously easy, but the last 10 were hard, and one of them is just about impossible. On the phone you can cheat, and I did that once very quickly just to check that there was a solution, and there was. I often keep a print of this puzzle in my bag to show to people who think they're good at solving sudokus. You can very quickly write the first number, a 5. But I've never met anyone, myself included, who could get any further.
Very excellent method that I haven't seen before. It is a very logical approach !! Like it very much> Which fill in program do you use for filling in the values into the grids?
Just for fun I filled in all of the potential candidates (not just 2 or 3 per box) and it because super obvious how many naked singles there were and it was done.
Ugh, there wasn't really a real tip here besides the basics... Naked singles basically mean you have to hit do every possible elimination before you find it... The only thing worse is when it's one of those "substitute in a number and see if it breaks something". I would love a solid method to actually spot those rather than just "guess and check randomly".
I still don’t understand how you assumed 2 is the in the 3rd box, 8th column. I would’ve spent a long time finding other options for 2. Can you share how you made that correct assumption? I’m missing something.
There is no other digit that cell can be. [4 and 8] are in the same box, [3, 5 and 7] are in the same row, [6 and 9] are in the same column. That cell can only be a [1 or 2]. And as he determined the [1] in that box will be in column 7, that cell can only be a [2].
It's worth noting that once the 1's are pencil marked in box 6, column 8, the naked 2 becomes visible. You don't even need to pencil mark the 1's in box 3 first, though I do think it's more realistic and more in tune with how you should be going about solving a sudoku to simply finish off any relevant pencil marks first before looking for naked singles.
The traditional full notation system is inefficient for speed solvers. The numbers clutter up the board, often hiding as much as they reveal, and valuable time is wasted unnecessarily filling in and removing marks. They prefer to use a more streamlined method called Snyder notation, that (for the most part) only adds candidates when there are exactly two possibilities left in a box. They have designed their platform to work the way they do. There are plenty of other programs out there that will automate that kind of thing if you want to go the regular route.
I guess in these earlier videos, they didn't use that software. I wish they'd go back and re-create the link like they have now. I had to resort to using Snip-It to get a screen capture, and printed it out, to complete by pen/pencil. Old-school, lol
@@shubhamdalal5960 I think like how you know that a particular row or column won’t have a certain number because of the pencil marks even if you have not marked that number specifically yet.
Whilst I agree that's probably hard to see if you are overly invested in Snyder notation, I don't think it's something that's particularly difficult. Every now and again we all miss something that we wouldn't have done on another day...
how exacly did he decide there can only be 2 in that place? cuz from what i can see in that line there are 3 more posibbilities of 2 being somewhere else
@@allmightsmaaash1082 The cell where he puts the 2 - he deduced that no other number can go there, instead of a 2 not being able to go anywhere else. Basically, every other number is already existing in either the same row, column, or block, but the 2.
On paper, after I've found the pairs in squares (snyder notation marks) I "think outside the box", i.e., I make a note of which digits are left to go into the most crowded sets. So on row 2 my note was "12689" for example. Then it's fairly quick to check each of the cells in that row. (I also note cells which only can have two digits, so r2c3 got a "2/8" note which was very quickly resolved when I found the 2 farther over.) I'm not super fast, but I get there.
I also have trouble seeing them, but, for now, the best I can come up with is to scan for the most restricted rows or columns, then see if they intersect in a 3x3 box. Or, find the most restricted 3x3 box, then look for the most restricted rows or columns feeding into that box, scanning to find the rows/columns/3x3 boxes with the least numerical overlap. Or, if I have thoroughly notated using Snyder notation, I look for cells with either no or a single Snyder little number, and test them for naked singles. If using a pencil, I mark unused numbers "outside the puzzle" adjacent to the candidate rows / columns / 3x3 boxes (demarking the 3x3 candidates with a squiggle line next to it, using a double squiggle to demark the numbers for the central 3x3 box (Box 5). Hope this wasn't too simple minded an answer.
At 3:35 I still don't why the middle box in the upper right can only be a 2. Couldn't it also go in the middle right box? Couldn't the 2 also go into the middle right box in the upper left 9 boxes?
how exacly did he decide there can only be 2 in that place? cuz from what i can see in that line there are 3 more posibbilities of 2 being somewhere else
![POLYCAT - ข้อความรูปยิ้ม :) [Music Video]](http://i.ytimg.com/vi/lBhIgPGCgbI/mqdefault.jpg)
When sudoku is the only place that you find naked singles...
I-
goated comment
lmfaooooooo
looooooooooooooooooooool
You win lol.
Him: *Took me a heck of a long time, almost 8 minutes*
Me: *(Takes a break 30mins in to look up sudoku tips)*
i laughed so hard at this i screen shot it for friends
It took me 3:32 to solve it. Oops.. Sorry...
would have easily taken me over 50 min, I just started Sudoku learning yesterday.
@@jackeyniraula You'll get a hang of it. It's mostly logic and finding patterns. Practice on a lot of easy Sudokus at first. This will train your brain to find the missing numbers in a row, column and block without counting. Then go slowly to the harder ones.
Watch Simon's tutorials. He explains the logic behind every technique in an easy to understand way.
@@Blubb5000 So true.
Corona got me playing sudoku
Same. But a book with over 1000 sudokus 3 years ago. Opened it once. Since a couple of months a day I do sudokus every day, cause lockdown is boring
Same
Sad this coment is 1 year old
If only if that was true 😂
1 year old comment about corona?!?!?!? damn
When Mark said pause, I spotted a naked 5 without even having to pencil anything in. Similar strategy to Mark's - I looked at cells with longest lines of intersecting digits and found that in box 9 the cell to the left of the 9 can only be a 5. Admittedly, that 5 placement doesn't seem to open up the puzzle much so eventually, the 2 on the third box would have been required.
One tip that I've picked up from watching these is to train yourself to occasionally scan the numbers in the rows and columns, looking for places where lots of different numbers overlap. Those are often places worth looking at more carefully.
R8C7 is a perfect example. If you scan the board you can see quickly that C7 has 2347, R8 has 3689, and 1 is in the box. So bam, you've just found a naked single 5.
Also look carefully at houses that have only a few empty cells, and make a note of what's missing from them. e.g. C5, which starts out with 5 digits given, leaving just 1238 to go. After checking the overlapping houses, while there are no singles out of the gate, you have already found two bi-value cells.
Imagine telling your friends I'm off to play sudoku to look for naked singles...
Lmao
He : I took hell a long time-8 minutes😔
Me : yeah I solved it in just 7 hours 😎
lol😂😂😂
i literally solved a puzzle because of this video. Never actually did 'cel type thinking', thanks
Great tip - “sometimes you have to switch to cell thinking”. I often find these videos hard to follow because he goes so fast, but THIS was a truly brilliant tip. Thank you!!
OHHH I CAN SEE NOW WHY 2 WAS THERE
Look at the row and column where 2 was
5, 7, 3 was at the left so you cant place em anymore
6, 9 was at the bottom of it so you cant place these numbers too
4, 8 was at the box so you cant place em anymore
1 and 2 are the only choice left
1 is about to be placed there!
Making 2 the only number left!
Thx Cryptic
U explained it better than the guy in the video♥️
The guy actually explain it clearly tho
@@mentul2766 I never asked for Ur opinion
@@umershaikh8012 now I didn't ask for yours mate, so care to mind your own business?
nichol dsouza I also didn’t ask for ur opinion again... see where this is going? This is what happens when you say you didn’t ask for someone’s opinion when they never asked for urs
Just started sudoku 3 days ago with an app from boredom (and cause of memory issues), but the fastest I managed to solve an Expert puzzle (1 block with 6 empty cells and only around 1-3 numbers in blocks max) was 14 minutes, and ever since that 1 lucky time it takes minimum 22 minutes! my strategy of writing down every single possible number is definitely not working lmao. Definitely gonna check more of your videos out as I never thought of keeping it this plain, page wise!
Very helpful method. IF you couple your method , while at the same time keeping an eye out for hidden pairs, it REALLY speeds up the process. I found several hidden pairs right away
how exacly did he decide there can only be 2 in that place? cuz from what i can see in that line there are 3 more posibbilities of 2 being somewhere else
@@allmightsmaaash1082 n my question is,how do i know whether this puzzle is a story of 2 placed at (8,2).
@@allmightsmaaash1082 It's not a case of "The 2 in the box can only go in this cell". It's the other way around - "I can't put 1, 3, 4, 5, 6, 7, 8 or 9 in this cell, so the only thing left for it to be is a 2".
This has been one of the most helpful sudoku videos I have ever seen. Many thanks for your help! I don't understand why your ideas are not taught more generally. Hope you make many more videos.
Without the need for the ones in the top right box, bottom right box also has a naked single below the 7 in column 7, row 8. It's a 5. It sees 1, 7 and 9 in it's box, 2, 3 and 4 in the column and (3), 6 and 8 in the row so the only possibility is 5. I didn't spot the one Mark did in the top box, though.
That’s one I spotted as soon as he did the 2. It leapt out at me as being an obvious one.
I did this without notations. It took me a very long time: 38 minutes ! I found a naked 5 in box 9, at r8c7 and thopught there was some light at the end of the tunnel, but no such luck. Then I finally took a look at row 2 and found the naked 2. This was what was needed. Fun puzzle.
Remember, the point is not how fast you solve the puzzle, but to only to solve it.
ummm, not always. I love to time myself. it adds a bit of a challenge and keeps me on track. I get distracted easily so timing makes it extra fun. But yeah, finishing is important but not the only importance to sum (pun... lol)
I think you should have continued to show us the rest of the solution, as I saw the 2 but I'm still stuck.
There is also a “Naked 5” in R8C7, on the very first move. :-))
Aha! Nice one, Swami!
Also my first find
How
What a nasty comment! I've been trying to find a way to deduct that naked 5 in R8C7. It's in R7C6. Damn you!
@@Maelstrom000 that could be 1 or 4 too, r8c7 can only be 5
Well, I always start with "1"
SAME😭😭😭
Column 7, numbers 1,5, 6, 8, 9 missing. Position 8 in this column has to be a 5 since 1,9, 8, 6 are ruled out. This is the naked single. I think the 2 that Mark had found in column 8 is called a hidden single.
Just a year later and the production quality has improved dramatically. I so wish this was solved through!
There is also a hidden single 5 in the right bottom box or square.
I would have completely missed that if not for this comment. Thanks.
Naked single in column 7, row 8 is what my eyes landed on, without the “1’s” trick.
The first number i found was a 5 in row 8 column 7. If I identify a cell where a number cannot be I mark it with a dot in the appropriate spot, eg top left for a 1.
17:59 for me. Pretty straight forward and not too hard.
I will say this one is a very nice example of the power of that 2 cells notation. Together with the scanning for cells that can only hold a single digit you have a real good puzzle for people just getting into sudokus and these two techniques.
In my month or so of following this channel and playing some of the games, I've realized that Snyder notation is very good for most traditional sudoku games, but it also tends to make some of the more complex puzzles and techniques harder.
The main problem with it is that logic techniques that rely on elimination and spotting broader patterns don't stand out as much. In particular, patterns like x-wings/fish are hard to locate, as they rely on noticing exactly which, where, and how many candidates exist in certain columns and rows.
I guess in the end you need to learn how to balance the use of Snyder and traditional cell-based notation, and when to switch between them.
It took me twelve minutes to solve the entire puzzle, which for me is fairly quick. But I never stalled out. Then again I was working on paper, which means I annotated a lot.
But seeing that 2 ... that is the hard part! As you said, the puzzle falls after that.
Heck of a time 8 minutes
I found several “naked singles”, some needed the highlighted technique. A video on spotting chaining would be most welcome. Your ability to spot them is uncanny.
I don't have link to play it, so would have to use a hand drawn grid. My start point would be a single 5 in C7 - that with3 & 7 as well as the 3, 5 & 7 in R2 gives those numbers as a triple in block 3. That means that 2 has be be in R2 of block 3, and places itself in R1C3. R2 becomes a single 8, the 7 goes in R3C1, and that gives 2 more 7s around the grid, and at least one 2 follows also. Now I'll watch, and my next number when the question came u is R8C7 = 5, and that wasn't the answer which was 2, a number I would have found a couple of moves later.
The more you play and practice sudoku the more efficient you become in solving that, i solved the extreme one in 6 minutes and 37 seconds.
This is the first video J found helpful after so many attempts. Thank you.
I’m still on level 4 with the sudoku guy. You look like a wizard casting magic!
At 2:46 we can straight away fill in 8 in 2nd row and 3rd column as in the first block there are 6 nos missing, all the other numbers are either present in the column we put 8 or in the row, so we had 2 possible values that is 2 or 8 but 8 cant be in 1st row 3rd column therefore 8 is in 2nd row 3rd column, now you can solve it under 7 or 6 mins!
Would this help solve very hard sudokus
First with your grid problem in the memory you fill in the empty cells starting with 1’s in the corner in the row and column and progress to 9’s in the other corner and then reverse the process.
However you must leave a cell blank if the number your supposed to fill is already in the sub grid or in the row or column of the cell your filling in.
You should be left with some empty cells.
Deducing from the numbers in the row column and sub grid check if the empty cell has one number not accounted for and if the number of empty cells in the row column and sub grid is even fill in the cell with that number.
Clear all cells that were filled in with the 1-9 scheme.
The cells left newly filled in should be correct.
Now Use a basic deductive method and go as far as you can with that and if you need to repeat the process once more.
O n
The 2s were easy to spot at the beginning just like the 8s and 9s
Everything else fell into place after your key insight. Although it took me rather longer than it did for you.
Been playing Sudoku for some time now and yes the hard puzzles took me time to figure out also but this technique has opened up my eyes more 😎. Thanks mate.
The 5 in the 9th cell is also a naked single. And you don't even need Schneider notation to find it.
I saw a naked single number 5 on the 2nd row from the bottom (unless I got it wrong), nearly immediately from a trick Simon explained once but then I still don't easily know where to go from there. I really have to get more practice I guess.
That was crazy 😝
how exacly did he decide there can only be 2 in that place? cuz from what i can see in that line there are 3 more posibbilities of 2 being somewhere else
I paused the video and solved it before watching. It took just over 10 minutes
While solving 2 , why did you choose center cell of third box? Why not adjacent cell of center cell? Can you please explain?
in 2:45 he can just pick number 7. The number 7 is already done.
I don't see how that is?
Please show us how to do the evening standard sudokus. I'm really struggling with these puzzles.
Watching these is both intersting yet makes my head hurt trying to figure out hwot spot such things
Now that you've seen it maybe you can spot them in the future. I didn't get the naked single on my own. It definitely helped. It at least reminds us to be aware of this and keep an eye out.
@@anonamatron I found a nice webstie that shows the naked concept to me in an interactive way. So i now understand it.
@@zuzoscorner I found a website about naked concepts too, but my parents asked me not to look at that type of thing anymore...
Zuzo's corner could u provide a link/if link get blocked by youtube just the search words please
@@zuzoscorner please inform the name of that website. Thank you. Elangovan.M.
This is very helpful thank you so much
The hell of a long time? Eight minutes?? Man, you've no idea what a long time is!
I normally solve difficult puzzles in - oh I don't know - five to ten minutes, maybe - occasionally much faster, though. But I have one that I've spent years on NOT solving! I had a Nokia telephone once (who didn't?) with 100 puzzles on it. The first 90 were ridiculously easy, but the last 10 were hard, and one of them is just about impossible. On the phone you can cheat, and I did that once very quickly just to check that there was a solution, and there was. I often keep a print of this puzzle in my bag to show to people who think they're good at solving sudokus. You can very quickly write the first number, a 5. But I've never met anyone, myself included, who could get any further.
Lau Bjerno you ought to send it to them!
Nah, too much trouble.
i want that sudoku if you can send it please
I want it too! Please?
thanks a lot, it really helped me with solving difficult Sudokus
I saw the situation with the one but didn’t connect it with actually placing a 2
Did he say he solved it in 8 minutes? Jeez it takes me an hour
7 to 20 min
i solved it in 6 minutes
and 1 hour
@@mrleon5607 🤣😂😂😂😂🤣🤣🤣
Very excellent method that I haven't seen before. It is a very logical approach !! Like it very much>
Which fill in program do you use for filling in the values into the grids?
I spotted most of the 8's before the 2.
Starts at 1:16
Just for fun I filled in all of the potential candidates (not just 2 or 3 per box) and it because super obvious how many naked singles there were and it was done.
I was shouting only 5 is good in that box and only 9 and so on but he fpcuses in the 2 for other boxes😭
Just started playing within the past two weeks. Best time is 13 minutes for easy level. Thought that was great until I saw this video🤦♀️.
Ugh, there wasn't really a real tip here besides the basics... Naked singles basically mean you have to hit do every possible elimination before you find it... The only thing worse is when it's one of those "substitute in a number and see if it breaks something". I would love a solid method to actually spot those rather than just "guess and check randomly".
I still don’t understand how you assumed 2 is the in the 3rd box, 8th column. I would’ve spent a long time finding other options for 2. Can you share how you made that correct assumption? I’m missing something.
There is no other digit that cell can be. [4 and 8] are in the same box, [3, 5 and 7] are in the same row, [6 and 9] are in the same column. That cell can only be a [1 or 2]. And as he determined the [1] in that box will be in column 7, that cell can only be a [2].
Not all that hard?!?
Fairly straightforward?!?
I have got to hand it to you, you are superhuman.
It's worth noting that once the 1's are pencil marked in box 6, column 8, the naked 2 becomes visible. You don't even need to pencil mark the 1's in box 3 first, though I do think it's more realistic and more in tune with how you should be going about solving a sudoku to simply finish off any relevant pencil marks first before looking for naked singles.
I'm surprised a software switch doesn't pencil in every possible for you
The traditional full notation system is inefficient for speed solvers. The numbers clutter up the board, often hiding as much as they reveal, and valuable time is wasted unnecessarily filling in and removing marks.
They prefer to use a more streamlined method called Snyder notation, that (for the most part) only adds candidates when there are exactly two possibilities left in a box. They have designed their platform to work the way they do.
There are plenty of other programs out there that will automate that kind of thing if you want to go the regular route.
Wow what a nice trick
Where is the link to the sudoku?
I guess in these earlier videos, they didn't use that software. I wish they'd go back and re-create the link like they have now. I had to resort to using Snip-It to get a screen capture, and printed it out, to complete by pen/pencil. Old-school, lol
Naked singles are always sooo hard for me to find without auto-candidate mode
Thanks sir it works really good 👍
Watching tutorials because im having a hard time having mistakes HAHHAHAHA
I have been sudoku for awhile but I don't understand the 2...
Hmmmm
I enjoy doing these while my meth lab is cooking
actually, there is a naked single 5 in r7c7 which is spotted immediately. better luck next time ;)
Nice video. On 4:51 , how do u determine that the 3 goes in Column 2?
Because of the 4. Even though he entered the 3 before the 4. Without knowing the position of the 4 you can't fill in the 3
What computer program are you using? By the way, very useful. Thank you
Thanks for sharing
put a 5 in box 6 under the 7 next to the 9, it is a naked single. popped right out (i was lucky)
I now read DeepFace's comment and explanation and I understand the first 2 now.
Thank you so much for this! I managed to finish a hard one because of this tip!
Which tip?
@@shubhamdalal5960 I think like how you know that a particular row or column won’t have a certain number because of the pencil marks even if you have not marked that number specifically yet.
très bonne vidéo
Thanks this a new method i need to try out
After guessing 1s how did he know that it would be a 2 there on the top right pile
Whilst I agree that's probably hard to see if you are overly invested in Snyder notation, I don't think it's something that's particularly difficult. Every now and again we all miss something that we wouldn't have done on another day...
You lost me at “ 2” How did you determine it was between 1and 2
Look at r2c8. Which numbers are already covered? There are only 2 options left because 3-9 is either already filled for that particular spot.
did no one see the 6 in the left middle box?
I still don’t understand how he got the 2 😅
The third element I found was the 4 in the lower right corner, a single
I followed all the way till you said... "This box must be a 2" I dont get it?.Augh.. Tahnk you young man!
At 5:00 he says from here on it is straightforward. Not for me. For experts it is straightforward I think.
what software is used in this video. any name or link
Too bad, I only play easy difficulty puzzles
And there is always an empty house (9*9 box)
9*9 box is never empty unless you're the one creating that sudoku.
If I could get rid of the caption texts I could see the whole puzzle. Too bad. Can't keep up.
It's medium level indeed. However thanks for your time.
how exacly did he decide there can only be 2 in that place? cuz from what i can see in that line there are 3 more posibbilities of 2 being somewhere else
@@allmightsmaaash1082 The cell where he puts the 2 - he deduced that no other number can go there, instead of a 2 not being able to go anywhere else. Basically, every other number is already existing in either the same row, column, or block, but the 2.
@@allmightsmaaash1082 , row -> 3 4 5 7 8 column -> 6 9 Square -> 1 8 4
Only left one number.
If it is a hard Sudoku there should be numbers that cannot be deleted (dark) There are no such numbers in this example .Please comment.
I have trouble to locate naked singles unless I look at one cell at a time, which is time consuming. Any tips to improve?
On paper, after I've found the pairs in squares (snyder notation marks) I "think outside the box", i.e., I make a note of which digits are left to go into the most crowded sets. So on row 2 my note was "12689" for example. Then it's fairly quick to check each of the cells in that row. (I also note cells which only can have two digits, so r2c3 got a "2/8" note which was very quickly resolved when I found the 2 farther over.) I'm not super fast, but I get there.
I also have trouble seeing them, but, for now, the best I can come up with is to scan for the most restricted rows or columns, then see if they intersect in a 3x3 box. Or, find the most restricted 3x3 box, then look for the most restricted rows or columns feeding into that box, scanning to find the rows/columns/3x3 boxes with the least numerical overlap.
Or, if I have thoroughly notated using Snyder notation, I look for cells with either no or a single Snyder little number, and test them for naked singles. If using a pencil, I mark unused numbers "outside the puzzle" adjacent to the candidate rows / columns / 3x3 boxes (demarking the 3x3 candidates with a squiggle line next to it, using a double squiggle to demark the numbers for the central 3x3 box (Box 5).
Hope this wasn't too simple minded an answer.
can someone explain how he got that 3 and 4 at 4:50
I still don’t get the #2 @3:43
R2c8 sees all numbers except 1 and 2. Once 1 is out of the picture it has to be 2
Why is there no app link for this one?
I want the full answer for your souduko
At 3:35 I still don't why the middle box in the upper right can only be a 2. Couldn't it also go in the middle right box? Couldn't the 2 also go into the middle right box in the upper left 9 boxes?
row -> 3 4 5 7 8 column -> 6 9 Square -> 1 8 4
Only left one number.
Vyc 21 yes! Thx. I finally got that.
I just came across this video. I spent a little over 10 minutes. Without using pencil marks. In my view it's not a hard puzzle.
how exacly did he decide there can only be 2 in that place? cuz from what i can see in that line there are 3 more posibbilities of 2 being somewhere else