SECRET To Solving Sudoku XY-CHAINS - SHC
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- Опубликовано: 11 сен 2024
- In SECRET To Solving Sudoku XY-CHAINS - SHC #114 by Smart Hobbies, I will show you how to solve the Classic Sudoku “Wild Indigo” by Wisteria Fall by using Sudoku XY-Chains. I solve this puzzle logically and explain all the expert Sudoku tips, tricks, and strategies as I apply them. Wisteria Fall AKA Wisteria is my featured setter for this month’s Setter Spotlight Series. Thank you Wisteria for permission to feature your puzzles on my channel.
The puzzle can be found at the following link:
tinyurl.com/hm...
This video is part of my Sudoku Handmade Classic series on my RUclips channel, Smart Hobbies. The goal of this series is to share the joy of solving Sudoku puzzles with you.
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Strategies demonstrated in this video:
Hidden Single
Naked Single
Pointing Pair
Naked Pair
Hidden Pair
Claiming Pair
Naked Triple
XY-Wing
XY-Chain
Empty Rectangle
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Catch all of my Sudoku Handmade Classic videos here: • Sudoku Handmade Classics
Check out Smart Hobbies page on Harold Nolte’s Sudoku Primer website here:
sudokuprimer.c...
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I used the software program CTC App for this solving video.
Let me know what you think and how you did in the comments below. Thank you so much for watching.
Timberlake
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Thank you so much for featuring the puzzle! Those are really nice chains you spotted, and the Florian Wortmann puzzle you link at the end is another great example of how powerful xy-chains can be! :)
For those who are curious, the empty rectangle showcased here can actually be seen right at the start of the puzzle, with 3s and 4s limited to either row 5 or column 5. When you combine this with the telegraphing you mentioned in rows and columns 2 and 8, the result is fascinating!
Wherever 3 goes in box 5, there is either an x-wing in r28c28 due to the rows, or an x-wing in the same location due to the columns! And the same is true for 4s.
Thank you so much Wisteria and for these wonderful insights into your puzzle.
Very enjoyable! Thanks Timberlake!
Glad you enjoyed it! I will release a new Wisteria video every Friday for the rest of December. Hope you catch them all.
Nice puzzle. Solved it in 26:56. At 14:50 you can actually finish the puzzle with another xy-chain: r4c7 (25)-r4c5 (53)-r8c5 (32)-r8c2 (23)-r5c2(32), eliminating 2 from r5c7, after which the puzzle solves.
Nice job. Thank you so much for watching and for pointing that out.
As ever, I couldn't spot an XY-Chain if it were placed on a pedestal under spotlights. In addition to the odd pair and triple, I used colours on 3s and 4s to get through this one. Now I'm going to watch how I should have done it, but I doubt I'll be any the wiser when the need for an XY-Chain arises in the future.
I have faith in you Julian. I do promise that at least one of Wisteria’s puzzles is approachable.
There is a mistake in your video. @16:20 you have the cursor about row4 col5 and state "if there is a 3 here", then you move your cursor to the remaining unsolved boxes and state "then one of these have to be a three". This is obviously incorrect, as there cannot be two 3s in the same box. Perhaps you meant to say "if this a 5 (in row4, col5) here". Otherwise, an informative and enthusiastic video.
You are correct. Thank you for pointing that out. For that first example, I meant to go down to the yellow and show where 3 was and how it eliminated the 3 from R5C2.