As at 8th minutes, there is a naked 8 in r1c2 and hence an 8 in r3c9 and a 38 pair in the middle column of block 6 straddling the 5; and from there a broken 279 triple in the middle and lower rows of block 6, leaving the 1s in r4c9 and r1c8. Not the end of the difficulties, but a giant step forward.
Thanks for the question. Okay, so first we have the idea that any sudoku puzzle should have a unique solution. If we are left in a position of having only a 13 pair in each of cells r7c2, r8c2, r7c7 and r8c7, there would be more than one possible solution. That means that one of the 7s in r7c2 or r8c2 must be true (at this stage we can’t say which one but it’s one of them for sure). Now that we know that, we can remove any other 7s in the same column (r2c2) or block (r7c3). I hope that’s okay for you. To learn more, you can search for Unique Rectangle and you will find other examples of these uniqueness techniques.
I dont get the rectangle pattern logic at the end. Got stuck in this one and still dont get it after your explanation. Must be missing some rudiments here. Thanks for the vid!
Thanks for the question. Okay, so first we have the idea that any sudoku puzzle should have a unique solution. If we are left in a position of having only a 13 pair in each of cells r7c2, r8c2, r7c7 and r8c7, there would be more than one possible solution. That means that one of the 7s in r7c2 or r8c2 must be true (at this stage we can’t say which one but it’s one of them for sure). Now that we know that, we can remove any other 7s in the same column (r2c2) or block (r7c3). I hope that’s okay for you. To learn more, you can search for Unique Rectangle and you will find other examples of these uniqueness techniques.
Up until recently, the NYT was striking a good balance between challenge and enjoyment. Now the challenge has become an elaborate game of hide and seek, but with little enjoyment. Avoiding the various opportunities to use uniqueness was a difficult task in this game, which just kept tempting us while hiding other options.
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Could you go more into detail about that 1/3 - 1/3/7. I couldn't explain this one to myself
As at 8th minutes, there is a naked 8 in r1c2 and hence an 8 in r3c9 and a 38 pair in the middle column of block 6 straddling the 5; and from there a broken 279 triple in the middle and lower rows of block 6, leaving the 1s in r4c9 and r1c8. Not the end of the difficulties, but a giant step forward.
I was stuck. I struggled. I looked hard. And I did it notation free. In 55 minutes.
Quite interesting puzzle. I tried but stuck in solving it.
I don't get the 1,3,7 pair in C2, R7 & R8 either. Could you explain why the 3's can be eliminated from these cells?
Thanks for the question. Okay, so first we have the idea that any sudoku puzzle should have a unique solution. If we are left in a position of having only a 13 pair in each of cells r7c2, r8c2, r7c7 and r8c7, there would be more than one possible solution. That means that one of the 7s in r7c2 or r8c2 must be true (at this stage we can’t say which one but it’s one of them for sure). Now that we know that, we can remove any other 7s in the same column (r2c2) or block (r7c3). I hope that’s okay for you. To learn more, you can search for Unique Rectangle and you will find other examples of these uniqueness techniques.
I get it now. Thanks for the explanation.
I dont get the rectangle pattern logic at the end. Got stuck in this one and still dont get it after your explanation. Must be missing some rudiments here. Thanks for the vid!
th-cam.com/video/m634uHyIlis/w-d-xo.html
Thanks for the question. Okay, so first we have the idea that any sudoku puzzle should have a unique solution. If we are left in a position of having only a 13 pair in each of cells r7c2, r8c2, r7c7 and r8c7, there would be more than one possible solution. That means that one of the 7s in r7c2 or r8c2 must be true (at this stage we can’t say which one but it’s one of them for sure). Now that we know that, we can remove any other 7s in the same column (r2c2) or block (r7c3). I hope that’s okay for you. To learn more, you can search for Unique Rectangle and you will find other examples of these uniqueness techniques.
@@zen_art_of_guardian_sudoku Many thanks for the explanation, makes total sense. I'm fairly new and your channel is helping me a lot!
OK
Up until recently, the NYT was striking a good balance between challenge and enjoyment. Now the challenge has become an elaborate game of hide and seek, but with little enjoyment. Avoiding the various opportunities to use uniqueness was a difficult task in this game, which just kept tempting us while hiding other options.
NF