3 Sudoku Tips EVERY Solver Needs To Know - SHC 241

In 3 Sudoku Tips EVERY Solver Needs To Know – SHC 241 by Smart Hobbies, I will show you how to solve the Classic Sudoku Puzzle 30 from Enthralling Sudoku Vol 2 by Ashish Kumar using 3 Sudoku tips every solver needs to know. These Sudoku tips, tricks, and techniques will help you play Sudoku better and solve Sudoku faster. I solve this puzzle logically and explain all the expert Sudoku tricks, Sudoku techniques, and Sudoku strategies as I apply them to the Sudoku game. Thank you Ashish Kumar for permission to feature your puzzles on my channel.

I used the software program CTC App for this solving video. Puzzle link:

This video is part of my Sudoku Handmade Classic series on my YouTube channel, Smart Hobbies. The goal of this series is to share the joy of solving Sudoku puzzles with you.
#learn #sudoku #youareawesome

Strategies demonstrated in this video:

Hidden Single
Naked Single
Full House
Pointing Pair
Naked Pair
Hidden Pair

Timestamps
0:00 Intro
00:19 It’s Solving Time
00:43 Puzzle Story
01:54 Tip #1
04:23 Tip #2
06:28 BONUS Tip
09:34 Tip #3
11:15 Sweeping The Blocks
12:12 BONUS Trick

Check out Smart Hobbies page on Harold Nolte’s Sudoku Primer website here:

Contact me here:
Discord: Timberlake#1905

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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[SmartHobbies]

Timestamps
0:00 Intro
00:19 It’s Solving Time
00:43 Puzzle Story
01:54 Tip #1
04:23 Tip #2
06:28 BONUS Tip
09:34 Tip #3
11:15 Sweeping The Blocks
12:12 BONUS Trick

[flingmonkey]

Okay, I tried this with the highlighter, about 15 minutes to solve, but not without your help, and you were a BIG help. I learned something BIG, and I now have an easy-to-apply strategy going forward. Here is the situation:

My highlighter shows me EVERY possible solution for every unsolved cell, right? I can forget building Schnider notation. But I also have the ability to click a "1" button and see all the places where a 1 could possibly go. I need to pay extra attention to when there are only two possibilities for a given number in any row, column, or block, with an eye towards "Is there any other number also limited to those two cells?" I can just click down the row of number buttons and easily see all the possibilities for those numbers. And if I find two cells with, say, a 2, and it looks like the 9s are also limited there, I can verify my old eyes are not playing tricks on me by clicking the 9-button. Once I find a pair like this I can start with the preclusions!

I think I have achieved a breakthrough!

[Duppa]

That was a fun puzzle. Thanks for sharing

[anaayoung]

My time was 4:07. It was an ok time for me! Thank you! 😊

[georgesthibaudeau]

The first serious restrictions I found was the result of the 35 oblique corner pair in block 7, which gave a vertical pointing pair of 9s in the middle column and a horizontal pointing pair of 2s in the middle row. I focused solely on the immediate impact of these restrictions: first, in column 2, 489 triple in rows 5, 7 and 9, and hence a 1 in row 1 and a 7 in row 3. This was enough to progress rather easily through the rest of the grid, realising among other things that all four corner blocks had identical constructions as I had found inblock 7. This is Mr. Kumar's style at his best. Great puzzle. Thanks for the great demo.

[AnonimityAssured]

Another fine offering from Mr. Kumar. Here's a path requiring a fair bit of virtual memory early on (32 = row 3 column 2):
32 (hidden single, owing to hidden pairs in boxes 1 and 7):
32, 12, 25, 94, 89,
58, 41, 78, 98, 87,
29, 27, 85, 75, 81,
52, 67, 76, 83, 31,
13, 38, 18, 35, 15,
39, 17, 97, 79, 93,
71, 23, 21, 72, 92,
74, 36, 34, 53, 43,
55, 63, 49, 45, 59,
69, 56, 54, 95, 96,
14, 16, 57, 61, 51,
65, 47.

My first variation had a HoDoKu rating of Extreme 8164. Here's a tamer beast:

100 000 007
020 809 060
003 000 500

070 204 030
000 060 000
080 305 020

006 000 700
050 607 080
400 000 009



HoDoKu rating: Hard 984.

Andrew Stuart rating: Tough Grade 333.



And here's a bit of a handful:

200 000 001
070 405 020
006 000 300

020 103 070
000 000 000
030 204 080

007 000 400
080 607 050
900 000 006



HoDoKu rating: Unfair 1318.

Andrew Stuart rating: Very Hard Grade 275.

Edited to make a small correction.

[BradJames]

i did it in 14:20! This is the first time I got very close to the time of the length of the video. I did attempt it a few hours earlier, but I messed up and deleted all that I had done. So I started from scratch this time; I think that counts. I wasn't working off memory the second time, I was just going where my eye would naturally go.

[JohnRandomness]

I got lots of pairs all over the place. An opening swordfish in 1s limited 1s to two per cornermarked block. I have no idea if any good came of it. I continued pencilmarking and placing digits, and I can't tell when the puzzle collapsed.

2:40 That 35 pair appeared during the ordinary course of cornermarking. I suppose that finding directly them would enable me to solve faster, but I think that looking in vain would slow my solve down.
4:10 My next step after cornermarking 9s? I had the 26 pair in block 1, and a pointing pair of 9s in block 7. Therefore I returned to block 1 and cornermarked 9s in row 2, then noticed that 5s had to go there, giving me a 59 pair, and letting me place 1 and 7.

[ketv]

4:14 What did I do? Swept the blocks with hidden pairs. Found a pointing pair of 9's in block 7, giving me a pair of 9s in block 4 and another in block 1. Sweeping block 1 gave me hidden 59's, and hence 1 could only be in R1C2, for the first solve. Watching on...

Yeah, after running the 1's, it's pairs, pairs everywhere. Pretty straightforward. I had marked pairs of 3's and 9's earlier, so I worked the pairs in a different order. Did it in 15m22s, not great but not horrible.

Not hard., but a pretty puzzle with the mirrored pairs in all the corners, and it's cute that you can Snyder-mark everything without solving anything.

[richardglover]

I have always at that first point, looked to pencil mark any row, column or box where I now know the contents of 5 or more of the cells.

[donmalone]

the key for me was a slot machine on 1s
eliminating 1 in the elbow cells R1C5 R5C19