📕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 Timestamps 0:00 Intro 00:20 It’s Solving Time 00:58 Puzzle Story 03:07 Question of the Day 03:26 Setting Up Sudoku Trick 06:25 Amazing Sudoku Trick 07:29 Critical Sudoku Eliminations 13:15 Solving After Amazing Trick 13:40 Neat Naked Triple Trick
07:38 after you pointed the intended solution. It was rally beautiful and easy indeed. Whoa... I should've thought about this alone but... wel.. hehe thanks for the solve! 🤗
Now this is the new stuff I'm talking about. I've seen coloring used in 6x6 challenging sudoku puzzles by other RUclipsrs but to see it in an extreme sudoku with logical reasoning is fascinating. I need to play it back to understand why yellow is there. I understood the purple and why reducing the 9 from the blue cell. Nevermind, I get why yellow is at the bottom row 9. I like this logic.
Not sure it'd help but I wanted to ask for curiosity's sake. At 5:37, after you identified the 1/2/9 cells, it struck me that the center cell (C5R5) would then have to be a 5/8 bi-val in order to avoid a deadly pattern with Row 9. Is that correct?
This took me a long time, although not as long as most "Extreme" puzzles. I eventually got the crossroads issue, I think. Pairs of cells such as R5C1 and R9C5 can't have the same digit (different from block 5's given digits). Otherwise, the digit is barred from block 5. I think that my first encounter was seeing what would happen if R1C5 were 9. That would force R8C9 to be 9 as well. Otherwise, an X-wing in 9s would bar 9 from block 5. This wasn't the first time I encountered a destructive X-wing. 13:10 What did I do after the cornermarking? I centermarked the triples in row 9 and column 1, and 12 in R1C9. Then I couldn't think of anything other than centermarking the grid.
Hi Timberlake. After you fill in the perimeter with central markings (R&C-1&9) you see that only 2 sevens can be placed in r1c5 & r5c9, and they HAVE to be sevens because of the mad geometry (Cracking The Cryptic) given that there are two sevens on r3c8 & r7c3, and after those , you can inmediately solve for the remaining two sevens. Then, block 3 becomes easy with 3 conjugate pairs 4/5,1/2 and 3/6. After that you solve the 8 in box 9, there is a pointing pair of twos in that box that solves r1c9 for a 1, and the rest of box 3 because box 9 now has two pointing pairs. At this moment, the crucial cell is obviously r9c1. I observed that placing either a 2 or a 9 in that cell, forces ones on r5c1 and 59c5, leaving no place for a 1 on box 5, so r9c1 has to be 1. And the sudoku is completely cracked.
Oh, I got so close! I found the same Snyders and BVC's you did, failed to find any single-candidate strategies after a fishing expedition, and marked the 129's and the 12. I realized they had to be key, and actually started the colouring. But I didn't spot that criss-cross pattern in the center box. I watched the video and saw you place the 9, and then everything else fell into place. Cool puzzle! It makes me think that there are probably a whole family of trivalue graph strategies out there - there's this, trivalue oddagon, and I wonder what else awaits discovery.
You asked what we did when we got stuck. I filled in all the 129's around the outsides, then determined that a 9 can't be in either the upper left cell or lower right cell because of the 12 in the upper right cell.. Then after that I determined that a 9 can't be in the lower left cell. After that my brain saturated and I gave up.
Hmm, I managed it on 2 1/2 guesses in about 38 minutes and it then took me another 50 minutes to determine uniqueness. I'll probably never be a Sudoku master, I guess I just do better with educated guesswork. (edit)😢 Just watched the video, nice solve. I had all the preliminary deductions but missed the crucial placing of the 9 in box 6, lol. The puzzle becomes pretty easy after that.
I find a squares that can only be two numbers, then i guess. I continue with the puzzle circling the numbers after the guess. If I guessed wrong, I go back and reverse the numbers.
Thank you for sharing. Some people call that bifurcation, or Bowman’s Bingo, or simple trial and error. Would you like to learn more strategies that would help you solve more of those cells logically without guessing?
Solving sequence: 1-9, twice around, horizontal rows with 5 solved, vertical rows with 5 solved, small squares with 5 solved, repeat. Get stuck, look at horizontal rows with 4 solved, vertical rows with 4 solved, small squares with 4 solved. Keep repeating the pattern.
![Noob To Max With DRAGON REWORK In Blox Fruits [FULL MOVIE]](http://i.ytimg.com/vi/LnBMOinoOvA/mqdefault.jpg)
📕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
Timestamps
0:00 Intro
00:20 It’s Solving Time
00:58 Puzzle Story
03:07 Question of the Day
03:26 Setting Up Sudoku Trick
06:25 Amazing Sudoku Trick
07:29 Critical Sudoku Eliminations
13:15 Solving After Amazing Trick
13:40 Neat Naked Triple Trick
07:38 after you pointed the intended solution. It was rally beautiful and easy indeed. Whoa... I should've thought about this alone but... wel.. hehe thanks for the solve! 🤗
Interesting technique. I’ll be using it. Thanks!
You are welcome, and I hope you do!
Genius - love this method and your brilliant explanation. Best sudoku channel by miles. I love it.
Thank you Nigel. 😊
Now this is the new stuff I'm talking about. I've seen coloring used in 6x6 challenging sudoku puzzles by other RUclipsrs but to see it in an extreme sudoku with logical reasoning is fascinating. I need to play it back to understand why yellow is there. I understood the purple and why reducing the 9 from the blue cell.
Nevermind, I get why yellow is at the bottom row 9. I like this logic.
Awesome job. Glad you liked it. I’ll try to find more great puzzles like this.
And thank you for connecting with me on Discord. 👍🏻
my sister taught me Sudoku. but I've forgotten how. lol. I'm locking this in so I can play it again... after many years. Thanks!
You are welcome. I hope you do. And thank your sister for me. 😊
Not sure it'd help but I wanted to ask for curiosity's sake. At 5:37, after you identified the 1/2/9 cells, it struck me that the center cell (C5R5) would then have to be a 5/8 bi-val in order to avoid a deadly pattern with Row 9. Is that correct?
Possibly. Can you explain a little bit more about how you get to the deadly pattern with 1/2/9 in R5C5?
This took me a long time, although not as long as most "Extreme" puzzles. I eventually got the crossroads issue, I think. Pairs of cells such as R5C1 and R9C5 can't have the same digit (different from block 5's given digits). Otherwise, the digit is barred from block 5. I think that my first encounter was seeing what would happen if R1C5 were 9. That would force R8C9 to be 9 as well. Otherwise, an X-wing in 9s would bar 9 from block 5.
This wasn't the first time I encountered a destructive X-wing.
13:10 What did I do after the cornermarking? I centermarked the triples in row 9 and column 1, and 12 in R1C9. Then I couldn't think of anything other than centermarking the grid.
Thanks for sharing John. It sounds like you did see the intended use of the middle block.
Hi Timberlake.
After you fill in the perimeter with central markings (R&C-1&9) you see that only 2 sevens can be placed in r1c5 & r5c9, and they HAVE to be sevens because of the mad geometry (Cracking The Cryptic) given that there are two sevens on r3c8 & r7c3, and after those , you can inmediately solve for the remaining two sevens. Then, block 3 becomes easy with 3 conjugate pairs 4/5,1/2 and 3/6. After that you solve the 8 in box 9, there is a pointing pair of twos in that box that solves r1c9 for a 1, and the rest of box 3 because box 9 now has two pointing pairs.
At this moment, the crucial cell is obviously r9c1. I observed that placing either a 2 or a 9 in that cell, forces ones on r5c1 and 59c5, leaving no place for a 1 on box 5, so r9c1 has to be 1.
And the sudoku is completely cracked.
Nice job and approach Robert! I didn’t see that with the 7’s. Thank you for sharing. I love to see others have approached this solve.
Im gonna habe to watch this many times as a fairly new solver it pretty much vlew my mind lol😅
I hope you do, Jeffery. Coloring can be a powerful technique you can use to solve hard puzzles once you get the hang of it. 🖍️
Oh, I got so close! I found the same Snyders and BVC's you did, failed to find any single-candidate strategies after a fishing expedition, and marked the 129's and the 12. I realized they had to be key, and actually started the colouring. But I didn't spot that criss-cross pattern in the center box. I watched the video and saw you place the 9, and then everything else fell into place.
Cool puzzle! It makes me think that there are probably a whole family of trivalue graph strategies out there - there's this, trivalue oddagon, and I wonder what else awaits discovery.
Awesome Kevin. I am glad this puzzle unlocked some more solving ideas for you. I’ll try to keep these great Sudokus coming.
Thumbs up
Thank you! 👍🏻
What app do you use?
SudokuPad - Timberlake links it in the video description.
You asked what we did when we got stuck. I filled in all the 129's around the outsides, then determined that a 9 can't be in either the upper left cell or lower right cell because of the 12 in the upper right cell.. Then after that I determined that a 9 can't be in the lower left cell. After that my brain saturated and I gave up.
Wow, Brad. That’s great logic you figured out there with the 12 in R1C9. Thank you for sharing.
Hmm, I managed it on 2 1/2 guesses in about 38 minutes and it then took me another 50 minutes to determine uniqueness. I'll probably never be a Sudoku master, I guess I just do better with educated guesswork.
(edit)😢 Just watched the video, nice solve. I had all the preliminary deductions but missed the crucial placing of the 9 in box 6, lol. The puzzle becomes pretty easy after that.
Thank you for sharing your experience, Grant. Keep it up. I think you are on the right path to Sudoku master. 👍🏻
I find a squares that can only be two numbers, then i guess. I continue with the puzzle circling the numbers after the guess. If I guessed wrong, I go back and reverse the numbers.
Thank you for sharing. Some people call that bifurcation, or Bowman’s Bingo, or simple trial and error. Would you like to learn more strategies that would help you solve more of those cells logically without guessing?
Feel a little anxious, then check my blood pressure!
😎
Solving sequence: 1-9, twice around, horizontal rows with 5 solved, vertical rows with 5 solved, small squares with 5 solved, repeat. Get stuck, look at horizontal rows with 4 solved, vertical rows with 4 solved, small squares with 4 solved. Keep repeating the pattern.
Thank you for sharing your pattern. Do you prefer solving with pencil and paper or an app?
@ I keep puzzles on a clipboard in the bathroom to work on while I sit on the john. Only tools are a pen and a plan.