3 Sudoku Concepts Every Solver Needs To Know

[@Sg190th]

Took me 9 minutes and 25 seconds. The amount of techniques I've garnered overtime from you and Rangsk had really helped me dominate these puzzles. Granted, this was medium, I am still happy.

[@SmartHobbies]

So glad to hear that 😀I've learned so much from Rangsk and the other channels as well. I hope to see more comments from you in the future on how your Sudoku journey is going.

[@anaayoung9142]

7:30 was my time. I felt this one similar to the other one. I had a slow start but after I found out some paira the puzzle had a great flow. Don't feel pressure to ansewer all my comments. Most of the time I just say a boring thing. But I know that a comment is good for the channel. Have a nice day! 🤗

[@SmartHobbies]

You too. I love answering the comments, especially when people like you share their times or improvements. Keep it up 🤗

[@popularmusic6018]

Easy to understand.

[@SmartHobbies]

Awesome. How long have you been solving Sudoku?

[@AnonimityAssured]

Most enjoyable. I first did it with two URs, just to get through it quickly, then went back to find an alternative. I think the URs sped things up a bit (especially the second one), but more importantly, they maintained the flow, which is essential when racing (95 = row 9 column 5; second write-in): 55, 95 (hidden single, owing to partitioning of box 5), 99 (hidden pair in box 4, forming gate), 87, 38, 28, 36, 85, 73, 78 (hidden UR, boxes 4 and 6), 25, 15, 34, 96, 94, 16, 14, 24, 26, 54, 56, 74, 84, 19, 79, 77, 83 (UR, boxes 7 and 8), 76, 86, 72, 82, 27, 17, 37, 11, 43, 63, 45, 65, 47, 67, 42, 62, 48, 68, 41, 93, 91, 23, 33, 58, 49, 51, 61, 52, 31, 32, 59, 69. And without URs: 34 instead of 78, 96, 94, 16, 14, 74, 84, 25, 15, 56, 54, 26, 24, 19, 32, 58 (hidden pairs in column; one resolvable), 78, 49, 51, 59, 52, 69, 83, 76, 86, 72, 97, 77, 82, 31, 27, 17, 37, 11, 43, 63, 45, 65, 47, 67, 42, 62, 48, 68, 41, 93, 91, 23, 33, 61.

[@SmartHobbies]

Nice job Julian. Glad you found 2 URs in your original speed run. Your Friday featured videos have been doing great. Thank you for suggesting all those puzzles in the comments. Glad I was able to evaluate them for the channel.

[@georgesthibaudeau1533]

Very nice, clever, puzzle. First dealt with the pairs in the central block with the 9 isolated in the central cell. From there found the 26 pair at the extremities of row 5, which allows to solve the 4 and the 8. Then, my shocking (to me) mistake. Having created great restrictions in row 5 and given the kind os symetry in this grid, I should have turned my attention to column 5, where I would have found the same types of restrictions as in row 5. This stupid lack of attention delayed me considerably. Yet I was able to complete the puzzle in "non-championship" time - to say the lest :) - yet notation free. Thanks for posting this delightful puzzle. Nice demo.

[@SmartHobbies]

Thank you for sharing Georges and for admitting that you missed the column 5 restrictions. Notation free is quite impressive.

[@sharmilisharmili472]

I did it the other way using restrictions of col 5 and missed row 5. 79 pair in row 9 of block 8 , then placed single 4 in row 9 at R9C5 out of the rem digits 1345, using the restrictions of col5 and then R9C9 wld be 35 , with 1's in bott row of box 7. Col 2 of box 4 had 19 pair with 48 at R5C2, meaning 3's in midd col of box 7 and therefore in row9, 3 gets placed at R9C9 which was 35 earlier. 5 at R8C7 &...... I remember getting 37 pair in row 1 and single 8 at R1C5.

[@Ramakrishnagm]

Solved. Tricky pairs, uniqueness of 68s in box 7 and 8 forced 6in r8c5 made fast solving. I'll watch video, hope it nice. Thanks for the puzzle.

[@SmartHobbies]

Nice job! I did not see the opportunity to use uniqueness. Glad to see you spotted that. 😎

[@Ramakrishnagm]

​@@SmartHobbies Thanks. ❤️.

[@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 Timestamps 0:00 Intro 00:20 It’s Solving Time 00:27 Concept Idea #1 05:20 Concept Idea #2 08:10 BONUS Tip 10:16 Concept Idea #3 13:14 Neat Naked Triple Trick 15:32 Right Angle Trick

[@JohnRandomness105]

I began NF, but shortly gave up. Overall, it wasn't difficult. The puzzle collapsed, probably when I found the naked 6. 9:50 Because I miss so many things, I overmark. I found block 4's 19 pair after finding a 345 triple in column 2. It took a couple further steps before I noticed that 3 was ruled out of row 9 in block 7 and forced into block 9's corner. 10:30 We couldn't place 345 in column 2 before the 19 pair? I did exactly that, centermarking blocks 1 and 7.

[@SmartHobbies]

Thanks for sharing about the 345 NT. I didn't realize you could place it before 19.

[@ke9tv]

12:56, I'm not fast. A few tricky pairs, but nothing really hard. The naked 9 in the center was pretty, and in the middle of the solve there was quite a long chain of displaced Snyder marks.

[@SmartHobbies]

Nice job! This was the hardest classic in Round 8, and you handled it quite well.

[@rogerweir1772]

Skysrapper (lop sided xwing)

[@SmartHobbies]

Nice find, Roger! I didn't see that.😎

[@sharmilisharmili472]

NF but took long to complete.

[@SmartHobbies]

I give you credit for doing this NF. 👍🏻

[@sharmilisharmili472]

@@SmartHobbies Thanks