Y-wing (XY Wing) - an Advanced Sudoku technique

In this video you'll learn how to use the Y-wing strategy in a Sudoku game.

"Y-Wing" is an advanced strategy for Sudoku experts. It often comes up in the difficult puzzles and it may take you some time and practice to figure it out.

#sudoku #sudokucom #sudokurules #sudokutechniques #xywing

[theodoreigbeyi]

For people who don't know why there needs to be a 4 in one of the people pincers: the pivot cell is either a 3 or 8. Either of those options will remove a non-4 note in one of the pincers, guaranteeing that said pincer is a 4.

And if any of the pincers is a 4, the cell in the 6th column and 9th row cannot be a 4 as well, since its either in the same row or same column as any of the pincers.

Hope this helps. Dont know if i explained it well.

[christafurden]

Dumb enough to be lost 45 seconds in, smart enough to realize how dumb I am 😑

[williamkepraios]

I thought this was an excellent video. Short and easy to follow explanation. I am looking for more by them.

[imnotgonnasay]

Wow! Nice little trick! I tried watching someone else try to explain this technique but your video made so much more sense to me! Thank you so much!

[buttninjaflex]

In row 8, there are two cells with a 4-5 pair. Why in the world is 4 not immediately removed from all cells in row 8, including the pincer cell?

[hiyoristroberi]

i already watch this and will forgot again

[arunakhil]

This was a good video but the clarity of the video is very low

[frankieJ]

Very good video, and I love that it is short and to the point. Too many of the Sudoku videos are drawn out for no reason.

[txstandstrong]

Can you explain the Y a better way, doesn’t make sense when there are other cells with h 4, and two or more had the 4/5 in them? confused

[anml.]

Actually they have their app and they recently started teaching (just providing) with new techniques everyday. I have been using the app consistently from around feb (148 days streak).

But the way they try to teach is complex and they must provide simplified logic with it.

[TheLifeOfJess]

I understand the Y wing trick but have found it only works sometimes. Has anyone else found this? I’m trying to see if I am doing something wrong.

I’m currently doing an expert sudoku atm, but if I use the Y wing technique to eliminate the common number (9) in a cell that sees both pincers (and I check in the back of the book for the solution), then I would have totally messed up my game because the solution in the back of the book says the cell is a 9! So I can’t understand why the Y wing technique is suggesting that I should have eliminated the 9 😅.

Anything I should be double checking or has anyone else come across this issue to?

[marcogonzalez]

My doubts in if its possible, to search for the pincer in the same Block.
A few mathematical reasoning can prove that wrong

[darcash]

Note: should be learnt alongside X wing(including jellyfish/swordfish variants) and later, XYZ wing

[manashigogoi]

If u find it complicated gain more experience by solving thousands of Sudoku, then u will understand it easily. If you are u beginner u might find it complicated.

[johnevans]

I kind of understand, but "y" wouldnt you eliminate the 4 from the top right on instead of the bottom right one? i mean one is 4 and 8 and the other is 4 and 5

[zbowqlv]

You arbitrarily established that the common number in the pincers means that this number must be done away with in one of the pincers, leaving it to finally appear in the other pincer.

Having laid down this condition, from the fourth cell in the sixth column cell (in row 9)) you removed the note (4) that is common in both pincers.

You removed this note from the fourth cell because you assumed that the number common in the pincers can appear finally in only one of them. How do you know? I left the number 4 to appear in both pincers but didn't end up with an irreconcilable digit in the pivot.

I gave a 4 to appear finally in each of the pincers and was left with 3 and 8 in the pivot, neither of which clashes with the 4 in each of the pincers.

You based your solution on the assumption that in the pincers the common note 4 can finally appear in only one of the pincers.

How do you prove that the common note 4 can finally appear in only one of the pincers?

Prove that, and your solution is OK.
I'm not saying that your solution isn't OK, it seems you made an assumption about the pincers which you guessed correctly.

[Annie-kikf]

Can't see the numbers in the grid. Low quality.

[tchiffo]

In the block where you located the pivot there is already a cell with the lonely note "8" which informs us that the only value the pivot can have is "3" and this affects the lower pincer that remains with only "4" as possible value... If all this is right than the two cells surrounding the "8" in the lowest row should contain both the value "5" which is impossible

[azlizzie]

There's definitely a piece of the explanation missing here. You could have shown how the pivot forces the pincers to be the shared value.

But for my purposes I appreciate the explanation on what combos of cells I am looking for. Thanks!

[thomascarlton]

It makes me mad because its so simple. I sit and want to come to these myself but i end up sitting for hours not making and new strategies smh