BEST Skyscraper Video Ever! Sudoku Advanced Tutorial 24

[@SmartHobbies]

📕Get my FREE Solving Guide that will help you solve over 80% of all Sudoku puzzles🧩to include NYT Hard👉👉www.buymeacoffee.com/timberlakeB/e/125822 Time Stamps 0:00 Intro 00:21 Skyscraper Type 1 00:36 When To Look For Sudoku Skyscrapers 01:02 How To Spot Sudoku Skyscrapers 03:20 What Is A Sudoku Skyscraper? 04:26 Skyscraper Key Points 05:09 How To Make Skyscraper Candidate Eliminations 05:47 What Is Asymmetrical Skyscraper? 06:52 Skyscraper Type 2 07:39 What Is Symmetrical Skyscraper?

[@JohnRandomness105]

I did the first puzzle without searching for a skyscraper. Near the end, I colored 58s which shortly became 5-not5s. Then I colored 78s, although I don't think it was necessary -- after doing it, I found a 78 seeing a 7. I found a skyscraper in 1s in the second puzzle, and it seemed to crack open the puzzle. I continued merrily along until I broke the puzzle by placing a 3 in the face of a 37 pair. Not knowing what to do, I backtracked to the skyscraper and wiped out the cornermarks and centermarks, and repopulated them, applying the skyscraper in the process. I found a second skyscraper, in 2s, and then a finned X-wing in 3s. That let me finish the puzzle properly this time. 1:10 The puzzle at this stage is screaming to be cornermarked. Also, I managed to solve this without a skyscraper. 2:30 I goofed and saw a non-skyscraper in columns 5 and 9. The END: I found a skyscraper in 2s. With 3s, I found a finned X-wing instead of a skyscraper.

[@SmartHobbies]

Nice job, John. Some of the other viewers also saw Finned X-Wings in example 2. I think when I did the first solving video, I did not use 3 Skyscrapers. Amberdot told me about it after watching my solve.

[@anaayoung9142]

Oh, hello! This two were great Sudokus! I tried both of them. The first one I pencilmarked everything that I could than I watched your explanation. The second one I tried by myself first and I did find the 1, 2 and 3 skyscrapers! It took me 13:35 to finish the second. Thanks for the video! 🤗

[@SmartHobbies]

You are welcome, Ana!

[@Sg190th]

5:02 I think I finally understand skyscraper. This kind of reminds me of if-then statements in coding. Also, on the second one, I found a UR. Idk if it's legit though since this is just about skyscrapers haha

[@SmartHobbies]

Nice job finding the UR. It is possible to see other strategies like that when you get to this point in a puzzle.

[@robertrisk93]

1:25 There is obviously a 4 needed to be filled in r7c4 (full house), but that just shows 2 things: That you are human and that your videos aren't edited.

[@SmartHobbies]

Thank you for catching that full house, Robert. You have a good eye. 👁️

[@ke9tv]

First example - got to where only 5789 were in the centermarks, and started colouring 5's from the 58 pair in block 4 (although I could have started from anywhere in the band) That coloring eliminated 5's from R1C2 and R9C3, leaving an 89 naked pair in block 1 that cracked the whole thing.

[@SmartHobbies]

Nice job using coloring, Kevin. Congrats on solving it that way. Thank you for sharing.

[@truthseeker576]

Sorry. You lost me at 10:08. Why can’t the cells in the top row be 1 instead of those in r4c6 and r5c3?

[@SmartHobbies]

Great question. After making the eliminations with that Skyscraper, you are left with only 1 place for a 1 in Block 4 and 1 place for a 1 in Block 5, so you can solve both of the blocks for a 1 in the cells that just happen to be the tips of the Skyscraper. Does that help?

[@pawovado]

I had two XY wings, first R4C5 (57), R7C5 (58), R4C9 (78) eliminate the 8 from cell R7C9 and then R5C7 (78) , R8C7 (58) and R7C9 (57) eliminate the 8 from R4C9 (78) and then the puzzle colapse

[@SmartHobbies]

Nice job spotting the XY-Wings. Thanks for sharing your method of solving. 😊

[@jefferystephens7677]

In example 2 isn't there an x-wing in there as well

[@SmartHobbies]

Thank you for your question, Jeffery. With the 1's, you can make a Finned X-Wing using either Rows 1 and 4 or Columns 4 and 6, which allows for an elimination. There is not a traditional X-Wing that I can see. How familiar are you with Finned X-Wings?

[@jefferystephens7677]

@SmartHobbies not familiar at all. I've heard of them but haven't watched a tutorial on them.

[@SmartHobbies]

@@jefferystephens7677 You are in luck. I have made such a tutorial for you: kzbin.info/www/bejne/f6Gcf6t4hsmao6ssi=HeJDwHx3YUwkZzEj

[@jefferystephens7677]

@@SmartHobbies Awesome. Thank you very much.