Lesson #20: Type 1,2, and 3 Unique Rectangles are covered in this video. I show plenty of examples to illustrate how to use this strategy. I hope you enjoy this video....and I hope you learn something!
Пікірлер: 15
@NeniomFood4 ай бұрын
As soon as I finished watching this video I was able to finish a puzzle I had been stuck on for half an hour! It took me 2 minutes after spotting two type 1 unique rectangles! Thanks!!
@barbarabauling75132 күн бұрын
Excellent video! Many thanks :)
@SmartHobbies5 ай бұрын
Great tutorial on Unique Rectangles and the “controversy” surrounding it.
@LearnSomethingNewEveryDay5 ай бұрын
Thanks Smart Hobbies, I appreciate the comment!
@lolasmom90883 ай бұрын
Thank you! You are an excellent teacher!!
@ricardokimball18442 ай бұрын
Thank you!
@leonidaskatsou963 ай бұрын
Hi from Greece.Thanks for your help.How about making a video for unique rectangle type 4,5,6,7;
@donnyh34973 ай бұрын
How do you catch a unique rabbit? Unique up on it
@basamfayad42024 ай бұрын
Great explanation I like your way how you explained steps in details, but I would like to ask you to do one evil sudoku in steps applying all these methods, and solve it from A-to-Z
@chrisbaldwin31483 ай бұрын
Question: If this technique were used on a puzzle with two possible solutions, would it yield one of the possible solutions or give a false chain? 🤔
@eugenetswong25 күн бұрын
If there are 2 solutions, then this could create 1 solution. I don't know what a false chain is.
@mikestoner38864 ай бұрын
In the 1,7 unique rectangle with one of the 4 cells having a 6, that one cell has to be a 6 because it is the only 6 in the box and the column, not because of the unique rectangle.
@armantookmanian19383 ай бұрын
Actually cells D6 and E6 should include the candidate value 6. So this was not a Type 1 Unique Rectangle.
@armantookmanian19383 ай бұрын
Guessing E6 is a 6 eventually leads to a contradiction, as does pursuing a guess that D6 is a 6. This leaves F6 as the only cell in column 6 that can contain a 6, and solving the puzzle without employing a Unique Rectangle algorithm .
@mridaho78713 ай бұрын
A unique rectangle sudoku is unsolvable. If you have a box with two squares with only two numbers, those two numbers are eliminated from the rest of the box and therefore you cannot put a number in the box to determine which number remains in which square. This logic also applies to the rows and columns. Without being able to determine which number belongs in each square the puzzle is unsolvable.