Well, the example given at 5:10 as being not an X Wing actually IS an X Wing! True, it is not an X Wing in rows 2 and 5 but it is an X Wing in columns 2 and 7. The "other sevens" mentioned can actually be removed.
Because he is addressing the column variation for people who didnt know this technique and that could confuse them. As a column variation goes, that example is not a true x-wing
+Francisco Grosso It's still a bad example. First off the logical jump from columns to rows is pretty obvious and self evident for many people with an understanding of sudoku. Second is that he already mentioned that the row technique exists so many people would already be looking for them. He said it was not an x-wing, what he should have said was it was not a column x-wing. Had he said it was not a column x-wing and then came back to it it could have been a good example.
Only 2 videos but this one is the best explanation of the x wing i have seen so far, we need more tutorials explaining this good. Most tutorials take too long, like they show one example while solving a 40 minute game.
I used this technique before, but I named it "phantom number", because you cannot see the number itself but can see its effects in the rest of the grid. Very useful in the hardest puzzles.
I don't really understand why you allow repeated numbers in columns but don't allow them in rows. If you rotate the grid by 90° now you cannot apply this rule anymore
Thank you for going at a reasonable pace and focusing on only one lesson in this video! I am a slow Sudoku player, and you have slowed yourself down so I can follow your explanation -- I appreciate it very much.
I agree with Debbie B. The explanation is admirably clear, and credit should be given for the simple graphics which illustrate it. Of course, experienced Sudoku solvers will find it over-long, but this video is not aimed at them. I once had an excellent piece of advice about how to explain something and it was: 1. Say what you're going to say. 2. Say it. 3. Say what you've said. The guy who made this video is obviously an excellent teacher.
Well done! I never saw a better explanation than this one. Also good examples, good pictures and a good siow and easy-to-understand speech - even for Non-English people. Thank you!
Excellent video! I really appreciate the clarity of what you've conveyed here. I've read about this technique before but it never really sunk in as well as it has watching your video. Many thanks for taking the time to do such a great job with this.
Thank you. This guy covers the advanced techniques yet in an easier to understand way. You'll want to view this more than once to understand the what is and isn't an "x-wing."
Why is it not an X-Wing at 5:10? There are other 7's in the ROWS of 2 and 5, but not other sevens in the COLUMNS of 2 and 7. Shouldn't we be able to eliminate the other 7's in rows 2 and 5?
You can balance the large cube which totals to 45 by each columns and each rows. This will total to 405 either way. But the codition that each of small sqauares contain figures from 1 to 9 was not met. Again you will see repitations of more than one figure in columns. In case you change it just one figure the same error appears again. But when you make it again the total of columns and rows would be 405.
Example 3 is literally an X-Wing - they're located in the columns, therefore allowing you to eliminate the 7s in the rows... If it cannot have matching numbers in either rows or columns, the X-wing doesn't help you eliminate any numbers at all, so what would even have been the point of spotting it?
Instead of saying that if one of the row (horizontal) cell that the other one can't be, for example an 8, you should state why it can't be an 8! You should state that it can't be an 8 in a particular row because then there would be two 8s in the particular row. You should then say that in Sudoku Puzzles there can only be one number (digit) in a; box, row, or column and you should provide examples. I, also noticed that you stated that a 7 example wasn't a X-wing, which is misleading and false. I can't remember if you were talking about a column-, or a row X-wing but let's assume that it was a column's X-wing then you should have said that it wasn't a column's X-wing but that it was a row X-wing. This is because it is difficult to learn X-wing. It's an illusion because it should be easy to learn but it can easily add 30 mins in solving a Sudoku's Puzzles if the X-wing isn't obvious! Even now, if I can't quickly see the X-wing then I think that it is usually quicker to find a pair. Choose one of the PM to see if it solves a problem. But if it was the wrong selection then choose the other PM (PMs are small temporary pencil marks) that I use when either; my arsenal of Sudoku's Puzzles techniques don't work or will take too long to solve a puzzle. I, prefer to solve extremely difficult Sudoku's Puzzles within 30 mins and easy ones within about 5 or 6 minutes, usually whilst watching TV. Should use bold or if possible triple brightness for the numbers to be clearer, but maybe it was also the font that you use and the size. In Microsoft's Word I would normally use Calibre. Any person with an Android phone should go to the < Play store > and download < Andoku Sudoku 3 > and also its camera to also install Puzzles by taking a picture in theory. It has 9 difficulty categories. Whereas most; newspapers, books and magazines only have the easiest 3 categories whatever they call them e.g. hard or challenging. If you get stuck or loss whilst trying to solve a problem then select interactive Help and it will usually tell you which technique that you should be looking for and highlight the square (cell). If you require further help it would give you the answer. For each category within the interactive Tutorial Section it will tell you which techniques that you have to master for each of the 9 categories. You can then practice any Sudoku's Puzzles Techniques with countless examples until you achieve the relevant level of perfection that you want before continuing with the particular category. The examples are realistic gameplay's situations. From: beginners to expert level. My advice to beginners would be to become proficient with solving naked singles. Then hidden singles, Then naked 2s, hidden 2s, naked 3s, and hidden 3s etcetera. Andoku isn't perfect but it's brilliant! I don't know if the camera's focusing fault has been repaired, yet, but there are still 2 other ways of inputting Sudoku's Puzzles into Andoku Sudoku 3. The following video is excellent for people (who want to quickly improve their Sudoku's Puzzles techniques skills) despite that I already know these things: ua-cam.com/video/b123EURtu3I/v-deo.html
Once "8" is a must in column 1 and 9 rows five or seven, It seems a simpler next move is to eliminate the "8" from the vertical rows first. That would leave you with the next move - "2" in the first column second row - the "8" in the fourth column second row - "6" in the fourth column fourth row - take it from there...there are a lot of easy moves before this.
again look at first sudoku case, look at the first 3x3 box row, number 9 and 7 always in pairs. once we found which numbers are in pairs and which are the lose variable, easier to find the solution. but this is just one method to solve it, you still need all the basis solving methods, like number elimination etc.
theres also another method solving insane sudoke by looking for number pattern in a 3x3 box collumn and or row, i.e. look at first sudoku case, first box collumn, 3 numbers always a lose variable, and the other 6 always in pairs, look at 3 and 9, int the first box collumn 3 and 9 always pair the third number is the lose variable, we know 2 and 7 are the lose variable, theres another lose number variable that is between 4 or 8.
I liked this rule of elimination very much. Well explained with many examples. Pl let us know the Video Link, where “ROW Variation” of X-Wing Technique is explained with examples. To niilus : I guess, the FOCUS in that example @ 5:33 was to emphasize what is NOT covered by X-Wing Col Var, hence “1” was not pointed out. Others can confirm / correct this.
Well, i understand what X wing rule is but what is the logic behind it? How can you say that only diagonally opposite number can exist, why not the suare above or below
X Wing - Example 3; you're saying in this video that this is not a x wing. I couldn't believe (no criticism, I'm trying to learn), looking over the rows there are only 2 possibilities voor number 7. Because as being a sudoku- student I'm trying to understand x wings. This is not meant as criticism, but would really appreciate your feedback; am I right. I solved this puzzle succesfully, assuming that this example with 7'ens in b2, b7, e2 and e7 definitely is a x wing. So the 7'ens can be excluded from b3, b9, e3 and e9. Looking forward for your reply. Kind regards, Rob from the Netherlands. Love your explanation and just notice that Markus W found out the same 5 yrs ago
In Example 3, 5:10, it is actually a "X wing" because vertically speaking, there are no sevens, so you can eliminate all the horizontal sevens. Do let vertical and horizontal get in your way of thinking, they are merely lines.
Yes- This is an X -wing situation - I have used it. Because, the columns 2 and 7 only contain the two 7s. They form a box and so, must be the 7s which remain. Surprised this is missed on this video.
Why its not a x wing if there is the same number in the horizontally way, but vertically it is one? wouldnt it be the same because sudoku would be the same, even if you rotate it?
Dhaaarg! You sound like our last year's science teacher! Teacher to class: "This is a plant. P-L-A-N-T, plant! It's green... Can you repeat after me, children, greeeeen..." 1. grade HIGH school! Great technique, though! :D
5:26 you state that's not an x-wing because of the rows. But that columns are seven-free. Does that make it an x-wing variation and thus we can eliminate the circled sevens?
Stefanos -I agree! This is an X -wing situation - I have used it. Because, the columns 2 and 7 only contain the two 7s. They form a box and so, must be the 7s which remain. Surprised he missed this.
in the 2nd part of example 3, why is it not an x-wing? if you apply x-wing in the vertical orientation instead of the horizontal orientation i can't see why you do not get an x-wing.
woa.... but the game I hade was a easy one... I started with a medium one but it was to hard, than I was like "and the hard one is toooooo hard?" and than I went to easy...
I don't know but, the first sudoku I solved was on the *easiest* setting, and it took me 23 minutes... Maybe it's because I'm not a very clever person...
I can see Im going to have to get a notebook for all these techniques for this game. Would love to learn it...I started over again a dozen times so far on so called easy puzzles. I have finished 1. lol
Great video, being slow to explain thoroughly for those who need it is a GOOD thing...if you need the tutorial then it beats the chick laying on her bed with a frazzled book and a pencil trying lamely and unsuccessfully to explain Sudoku.
Hi, I didnt undertand that why this situation isnt X-Wing (5:30), because if i rotate this sudoku by 90 degrees, so X Wings rules have not been broke. Or i miss something?? Thanks
Great way to put it: "Let's see some formations that look like x-wings but are not x-wings. For example this one, do you think it's an x-wing?" Hmmm... you made me wonder for hours
Never called this the “x-wing pattern.” I call it competing numbers. Same can be applied whenever a number is limited to two spaces within a cell. You can conclude that the rest of that row or column (depending on the orientation) will not include that number.
This quarantine thing is making me want to become a sudoku grandmaster.
Same.
Same here
Same
Same
me too
Even after 10 years, this is still the best explanation I could find anywhere. This has aged really well, thank you!
Well, the example given at 5:10 as being not an X Wing actually IS an X Wing! True, it is not an X Wing in rows 2 and 5 but it is an X Wing in columns 2 and 7. The "other sevens" mentioned can actually be removed.
Because he is addressing the column variation for people who didnt know this technique and that could confuse them.
As a column variation goes, that example is not a true x-wing
far out man
+Francisco Grosso It's still a bad example. First off the logical jump from columns to rows is pretty obvious and self evident for many people with an understanding of sudoku. Second is that he already mentioned that the row technique exists so many people would already be looking for them. He said it was not an x-wing, what he should have said was it was not a column x-wing. Had he said it was not a column x-wing and then came back to it it could have been a good example.
Markus Wiederkehr iiii
yes you are right, there is x wing in cols 2 and 7
Very detailed explanation. My slow brain processing process finally comprehends the technique.
Only 2 videos but this one is the best explanation of the x wing i have seen so far, we need more tutorials explaining this good. Most tutorials take too long, like they show one example while solving a 40 minute game.
I used this technique before, but I named it "phantom number", because you cannot see the number itself but can see its effects in the rest of the grid. Very useful in the hardest puzzles.
Old but Gold, your explanation is easy to understand, thank you. Looking forward to your next tutorial!
Example 2: ok I get it
Example 3: wait a second...
Wow, I came to learn this technique, but it turns out that I've been using it for a while without realizing it! Nice.
same (sorry Ik this comment is 6 years old)
@@a_bear and now this comment is 2 years old
I don't really understand why you allow repeated numbers in columns but don't allow them in rows. If you rotate the grid by 90° now you cannot apply this rule anymore
Nice rhyme
You explain this exceptional well. Please do more. You're a great teacher!
I was actually looking for Star Wars...
Saw this 3 years later and I’m disappointed that brilliant comment has not received more credit 🤣🤣
That's Y-Wing mate
Just use The Force
@@tod3608 x wing also m8
Same, but I remembered that my school had a competition about Sudoku so I watched it.
Example #3 IS an X-Wing. They are the only 7's in their respective columns. X-Wings aren't only checked by rows.
Thank you for going at a reasonable pace and focusing on only one lesson in this video! I am a slow Sudoku player, and you have slowed yourself down so I can follow your explanation -- I appreciate it very much.
I agree with Debbie B. The explanation is admirably clear, and credit should be given for the simple graphics which illustrate it. Of course, experienced Sudoku solvers will find it over-long, but this video is not aimed at them. I once had an excellent piece of advice about how to explain something and it was:
1. Say what you're going to say.
2. Say it.
3. Say what you've said.
The guy who made this video is obviously an excellent teacher.
"The row variation of X-Wings is next." Ten years later....
Lol
Well done!
I never saw a better explanation than this one. Also good examples, good pictures and a good siow and easy-to-understand speech - even for Non-English people.
Thank you!
always tried the TIE-Fighter technique but this one works better thank you!!
One time I tried the Death Star technique and the puzzle solved itself. Kind of boring if you ask me!
Mrs Doubtfire just taught me about X Wings : )
Yo still alive mate ?
Thank you so much! This was really helpful! Other videos I've seen about x-wings didn't make as much sense as this video did! :)
This was so clearly explained and easy to understand!!! Thank you!!!
Tee third example IS an X wing but a column one. A mistake at 6.39 a 7 appears where a 6 should have been eliminated.
That was my question too. I think it is an X-wing
Important sudoku puzzle test on Monday
Thanks for explaining this for me. I generally didn't play much Sudoku when it was popular, so I was behind on the curve.
Best x-wing explanation. Now, where is the row variation?
He never made it haha
Example 3 second set of 7's.
Excellent video! I really appreciate the clarity of what you've conveyed here. I've read about this technique before but it never really sunk in as well as it has watching your video. Many thanks for taking the time to do such a great job with this.
BEST explanation of the X-wing I've seen.
lol was dumbest and for morons only info ....
Thank you. This guy covers the advanced techniques yet in an easier to understand way. You'll want to view this more than once to understand the what is and isn't an "x-wing."
Nice explanation..tq
It become obvious with your excellent explanation!!! Thank you
lmao
Thank you. This is the best tutorial so far.
Excellent instruction. I am looking for more by this instructor. Great clarity.
Thank You so much for posting this video. Now you just contributed to the completion of my very first Sudoku. Thanks.
Johnny Derogene And it was an easy one...wait until you get to the medium ones
Why is it not an X-Wing at 5:10? There are other 7's in the ROWS of 2 and 5, but not other sevens in the COLUMNS of 2 and 7. Shouldn't we be able to eliminate the other 7's in rows 2 and 5?
Where is the video for the row variation?
I think I did really well to make it to 1.34 without falling asleep,but you beat me. Forget sudoku,treat people with sleep probs,you’re a natural.
66Pipes66 that's right...if you have insomnia, , just watch a sudoko video...be asleep in no time
Best x wing explanation so far. Istg
You can balance the large cube which totals to 45 by each columns and each rows. This will total to 405 either way. But the codition that each of small sqauares contain figures from 1 to 9 was not met. Again you will see repitations of more than one figure in columns. In case you change it just one figure the same error appears again. But when you make it again the total of columns and rows would be 405.
Nice I can finally solve expert sudoku without cheating or having mistakes.
Thanks,very well done presentation dude. Before this I'm not really clear about X-Wing rules. Thumbs up,cheers.
Example 3 is literally an X-Wing - they're located in the columns, therefore allowing you to eliminate the 7s in the rows... If it cannot have matching numbers in either rows or columns, the X-wing doesn't help you eliminate any numbers at all, so what would even have been the point of spotting it?
I learned something here, can't wait to run across a difficult sudoku! thx!
Instead of saying that if one of the row (horizontal) cell that the other one can't be, for example an 8, you should state why it can't be an 8!
You should state that it can't be an 8 in a particular row because then there would be two 8s in the particular row.
You should then say that in Sudoku Puzzles there can only be one number (digit) in a; box, row, or column and you should provide examples.
I, also noticed that you stated that a 7 example wasn't a X-wing, which is misleading and false.
I can't remember if you were talking about a column-, or a row X-wing but let's assume that it was a column's X-wing then you should have said that it wasn't a column's X-wing but that it was a row X-wing.
This is because it is difficult to learn X-wing.
It's an illusion because it should be easy to learn but it can easily add 30 mins in solving a Sudoku's Puzzles if the X-wing isn't obvious!
Even now, if I can't quickly see the X-wing then I think that it is usually quicker to find a pair.
Choose one of the PM to see if it solves a problem.
But if it was the wrong selection then choose the other PM (PMs are small temporary pencil marks) that I use when either;
my arsenal of Sudoku's Puzzles techniques don't work or will take too long to solve a puzzle.
I, prefer to solve extremely difficult Sudoku's Puzzles within 30 mins and easy ones within about 5 or 6 minutes, usually whilst watching TV.
Should use bold or if possible triple brightness for the numbers to be clearer, but maybe it was also the font that you use and the size.
In Microsoft's Word I would normally use Calibre.
Any person with an Android phone should go to the
< Play store > and download
< Andoku Sudoku 3 > and also its camera to also install Puzzles by taking a picture in theory.
It has 9 difficulty categories.
Whereas most; newspapers, books and magazines only have the easiest 3 categories whatever they call them e.g. hard or challenging.
If you get stuck or loss whilst trying to solve a problem then select interactive Help and it will usually tell you which technique that you should be looking for and highlight the square (cell).
If you require further help it would give you the answer.
For each category within the interactive Tutorial Section it will tell you which techniques that you have to master for each of the 9 categories.
You can then practice any Sudoku's Puzzles Techniques with countless examples until you achieve the relevant level of perfection that you want before continuing with the particular category.
The examples are realistic gameplay's situations.
From: beginners to expert level.
My advice to beginners would be to become proficient with solving naked singles.
Then hidden singles,
Then naked 2s, hidden 2s, naked 3s, and hidden 3s etcetera.
Andoku isn't perfect but it's brilliant!
I don't know if the camera's focusing fault has been repaired, yet, but there are still 2 other ways of inputting Sudoku's Puzzles into Andoku Sudoku 3.
The following video is excellent for people (who want to quickly improve their Sudoku's Puzzles techniques skills) despite that I already know these things:
ua-cam.com/video/b123EURtu3I/v-deo.html
In one example that you said it was not an X wing because it still had 7s in the row. You have checked the columns too.
I learned something! I just hate writing all the possible numbers in the cells. Makes the soduku look too cluttered.
Once "8" is a must in column 1 and 9 rows five or seven, It seems a simpler next move is to eliminate the "8" from the vertical rows first. That would leave you with the next move - "2" in the first column second row - the "8" in the fourth column second row - "6" in the fourth column fourth row - take it from there...there are a lot of easy moves before this.
I AM publicly thank you, for showing me what has always been right in front of me. YOU ARE AN EXCELLENT TEACHER!! GOD BLESS YOU ~~~~~~~~~
Thanks you so much, I saw some videos about this thecnique but I didnt understand it until now
very good explanation done by you than any body so far .thank you .
Hi, I have a little confusion. in column 3 and 7, there are 4 opposite "7"s with no other "7"s in the columns - this should signify an X-wing, no?
again look at first sudoku case, look at the first 3x3 box row, number 9 and 7 always in pairs. once we found which numbers are in pairs and which are the lose variable, easier to find the solution.
but this is just one method to solve it, you still need all the basis solving methods, like number elimination etc.
Good explanation and it was very helpful. Kindly explain the sky scapper too
theres also another method solving insane sudoke by looking for number pattern in a 3x3 box collumn and or row, i.e. look at first sudoku case, first box collumn, 3 numbers always a lose variable, and the other 6 always in pairs, look at 3 and 9, int the first box collumn 3 and 9 always pair the third number is the lose variable, we know 2 and 7 are the lose variable, theres another lose number variable that is between 4 or 8.
There needs to be a more captivating Sudoku channel with good graphic design.
Best explanation. Wish he explained other techniques.
Nice video!
I liked this rule of elimination very much. Well explained with many examples.
Pl let us know the Video Link, where “ROW Variation” of X-Wing Technique is explained with examples.
To niilus : I guess, the FOCUS in that example @ 5:33 was to emphasize what is NOT covered by X-Wing Col Var, hence “1” was not pointed out. Others can confirm / correct this.
Ok, so, its currently 4am where I live. I don't do Sudokus. Why exactly am I watching this again?
9 years old as well
Good video
Well, i understand what X wing rule is but what is the logic behind it? How can you say that only diagonally opposite number can exist, why not the suare above or below
This feels like a method for making your own Sudoku set
5:05 we can't use X-Wing because it's about column variation, but we can use Y-Wing.
This explanation is very good and very clear.
X Wing - Example 3; you're saying in this video that this is not a x wing. I couldn't believe (no criticism, I'm trying to learn), looking over the rows there are only 2 possibilities voor number 7. Because as being a sudoku- student I'm trying to understand x wings. This is not meant as criticism, but would really appreciate your feedback; am I right. I solved this puzzle succesfully, assuming that this example with 7'ens in b2, b7, e2 and e7 definitely is a x wing. So the 7'ens can be excluded from b3, b9, e3 and e9. Looking forward for your reply. Kind regards, Rob from the Netherlands. Love your explanation and just notice that Markus W found out the same 5 yrs ago
great technique. very helpful .thank you
In Example 3, 5:10, it is actually a "X wing" because vertically speaking, there are no sevens, so you can eliminate all the horizontal sevens.
Do let vertical and horizontal get in your way of thinking, they are merely lines.
Yes- This is an X -wing situation - I have used it. Because, the columns 2 and 7 only contain the two 7s. They form a box and so, must be the 7s which remain. Surprised this is missed on this video.
I appreciated your calm explanation. Thanks!
In Ex. 3 there is still a X wing but in the other direction
Very well explained SIR. THANKS.
It's good video, Make another video plz
Falah I.N. No!. one is enough. .I'm getting tired, very tired..Zzzz
Why its not a x wing if there is the same number in the horizontally way, but vertically it is one? wouldnt it be the same because sudoku would be the same, even if you rotate it?
Dhaaarg! You sound like our last year's science teacher!
Teacher to class: "This is a plant. P-L-A-N-T, plant! It's green... Can you repeat after me, children, greeeeen..." 1. grade HIGH school!
Great technique, though! :D
very good dear
5:26 you state that's not an x-wing because of the rows. But that columns are seven-free. Does that make it an x-wing variation and thus we can eliminate the circled sevens?
Stefanos -I agree! This is an X -wing situation - I have used it. Because, the columns 2 and 7 only contain the two 7s. They form a box and so, must be the 7s which remain. Surprised he missed this.
Thank you Sir
The last formation of this video gave construction to another XWing formation that was (nearly) outlined earlier in the same grid.
Cleared X-wing identification for me.
in the 2nd part of example 3, why is it not an x-wing? if you apply x-wing in the vertical orientation instead of the horizontal orientation i can't see why you do not get an x-wing.
thank u i will try this technique to day when i find it logic i will say thank u so much
Thank You kindly....at last an explanation i can follow!
How long das an average normal person need for an simple sudoku paper? I hade one online and it took me 7:03 minutes to solve it...
I solve it in no less than 15 minutes, so, you're pretty fast :)
woa.... but the game I hade was a easy one... I started with a medium one but it was to hard, than I was like "and the hard one is toooooo hard?" and than I went to easy...
I don't know but, the first sudoku I solved was on the *easiest* setting, and it took me 23 minutes... Maybe it's because I'm not a very clever person...
Ok...
+A9HirotoPon i completed in 3 min
loved the explanation, loved the voice, loved the accent; however, it is difficult to comprehend. Thank you very much though.
I can see Im going to have to get a notebook for all these techniques for this game. Would love to learn it...I started over again a dozen times so far on so called easy puzzles. I have finished 1. lol
@Glendale1901 You're so right...I am in total agreement with what you say
very cool technique, thanks
Sudoku puzzle are amazing to understand.
Great video, being slow to explain thoroughly for those who need it is a GOOD thing...if you need the tutorial then it beats the chick laying on her bed with a frazzled book and a pencil trying lamely and unsuccessfully to explain Sudoku.
Hi, I didnt undertand that why this situation isnt X-Wing (5:30), because if i rotate this sudoku by 90 degrees, so X Wings rules have not been broke.
Or i miss something?? Thanks
Great way to put it:
"Let's see some formations that look like x-wings but are not x-wings. For example this one, do you think it's an x-wing?"
Hmmm... you made me wonder for hours
Based on the explanation given for example 3, I don't see how example 2 qualifies as a valid x-wing formation. What am I missing?
example 2 qualifies as x-wing where the wings are 4.
there’s only two 4s in both rows.
Отлично, доходчиво объясняет. :)
Thanks for this video, I love learning new strategies
There is no new strategy here. It's basic sudoku rule that you cannot use the same number in the same row or column.
Schau doch mal hier. Da gibt es einen Kurs von Anfänger bis Fortgeschrittene.
Thank you for your explanation
thank you
I like how you speak and teach
Thanks for teaching!!
May I know the name of the one who invited this X-wing I will make some articles on this. It's very helpful.
I thought of this myself . It is common sence to be honest
TreloSAlkiS1 Good For You, Smart People always show in Public as I Expected.
stamnion I would like to suggest an Anime title "Phi Brain". Try to find it interesting.
Never called this the “x-wing pattern.” I call it competing numbers. Same can be applied whenever a number is limited to two spaces within a cell. You can conclude that the rest of that row or column (depending on the orientation) will not include that number.
Thank you! You explain things very well.
The purpose of a name to virtually anything, is to allow itself to be universally identifiable and understood. It's common sense.
sudoku