This video demonstrates systematic Sudoku solving techniques including identifying number pairs (doubles) in rows, columns, and boxes, using process of elimination to place numbers, and applying box constraints to determine valid positions for digits. The walkthrough shows how to progress from basic placements to complex logical deductions by analyzing blocked cells and identifying which numbers can only fit in specific locations within the 9x9 grid.
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New York Times Sudoku Hard Solution for July 18, 2026: Walkthrough
Added:Okay, so this is New York Times sudokard for July 18th, 2026.
This is my walk through and you can play this sudoku from the link in the description.
Okay, let's get it going. First thing first, I can place uh yeah, I can place three on row three.
And to do that I need to look at box eight where this three blocks these.
This three blocks these.
So three in box eight will be here or here. So this cannot be three. And this three blocks these. That gives me three here.
I can place five on column one. This five blocks here. Five here blocks this cell. Five here blocks these. So five can only go here.
Now uh there are two doubles in box one.
Um there's two four double. I should say that's on row three. Uh this cell is blocked by two and four here.
And here's two and four which belong this cell. So on row three uh two and four have to share these two cells.
Now uh there's another double which is one and five because here's one and five and here's one and five. So these cells cannot use one and five. So these will be one and the five and because no other number can use these cells I can place seven because this seven blocks these so this would be seven and one five to four um doubles that means these will be eight and the nine and here's eight so this would be nine this would be eight and uh this eight blocks these So I get eight here.
Nine and the nine gives me nine here.
And this seven blocks here. This seven blocks this cell. This seven blocks this cell. So I can place seven on column uh row one.
And uh these three blocks these gives me three here.
Now these are down to one and the five.
Here's one. So this would be five. And this would be one. That gives me five here.
Okay. Uh now three three gives me three here. [snorts] And that Oh, what am I doing now?
3 three five oh four six seven wait there's a one and Two H 467 2 4 6 7 8 9 2 4 6 Oh no. Uh there's still something simple in box eight because this cell and these cells cannot use five and 9. So these will be 59 double and these will be 2 38 and the eight here belongs these cells.
So this would be eight. Two here gives me three and the two uh one six 7 one and one block. This gives me one here.
Now that gives me one nine double in box six. Here's one and nine which block these cells and this cell is blocked by one here and nine here. So these four cells cannot use one and the nine which means these will be one and nine and this will be 2 68.
Eight and eight block these that gives me eight here. [snorts] Eight. Eight and eight gives me eight here.
And this will be uh one and nine. And here's one. So this would be nine. This would be one.
And now eight here blocks this cell. This eight blocks here. This eight blocks here. So I can place eight on row six here.
Uh these are two 4 six and these are six and seven.
Five, nine means this will be four and seven.
Okay, I can place one on column 9. One, one, one, one. Block this cell, this cell, this cell, and this cell. So, one can only go here on column 9. Now, uh three 49.
Okay, these will be three, four, nine.
Here's three and the four, which make this cell nine. Three here gives me four and the three. And that gives me one and the nine.
And this will be six, seven, nine.
Here's seven and nine. So this will be six and that gives me two four two and here's six.
Six and six gives me six.
Here the last number of box four is also six.
And the last number here is seven.
uh two blocks here gives me two and this would be four. The last number of column five is four and this would be seven.
These are one and two and now I have one here. So two and one. The last number here is four.
Four.
Four and four gives me four here.
And this would be two and eight. Eight gives me two and eight. Two blocks this cell gives me two and six. Six and six gives me six. Here, this would be five.
That gives me nine. Five. 9. 7.
And this would be eight. And here's seven.
Okay, here it is. Thank you very much for watching. And if you like the video, please like and subscribe. And have a good one.
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