📕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 00:19 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
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.
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.
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.
It is! Sometimes these puzzle creators can predict how we will use Snyder Notation and force us to look even deeper. Thank you for sharing your experience. 😎
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.
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📕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
00:19 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
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.
Glad you liked it, Georges. Great job finding the restrictions with the 9s.
I had the same approach here as well
@@chaotix37 👍🏻😎
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
100000007020809060003000500070204030000060000080305020006000700050607080400000009
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
200000001070405020006000300020103070000000000030204080007000400080607050900000006
HoDoKu rating: Unfair 1318.
Andrew Stuart rating: Very Hard Grade 275.
Edited to make a small correction.
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.
Well done Brad! That is great to hear. Thank you so much for sharing. 👍🏻
My time was 4:07. It was an ok time for me! Thank you! 😊
Awesome job. Thank you for sharing!
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.
It is! Sometimes these puzzle creators can predict how we will use Snyder Notation and force us to look even deeper. Thank you for sharing your experience. 😎
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.
Nice John. Thank you for sharing your experience with the puzzle.
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.
Nice technique. Thank you for sharing.
Puzzle solved in 7:48
Way to go Chaotix! Are there any tips you can share on how you got through this one in less than 10 minutes?