Sudoku tutorial #93 A procedure or not!

#Asudoku #learn sudoku, #udokus instruction ,sudoku techniques, sudoku tricks #sudoku lessons , #sudoku for memory
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The debate among sudoku players is "should you use a procedure or not". I suggest that a procedure is good for beginners.. If on the way of solving you see something which you can be solved then go ahead and then come back to a procedure . O course it is your choice.
In this puzzle you may wish to copy it down first and try it yourself, then watch me solve it.
There are many paths to take and in this puzzle. I miss some important ramifications and as a result finish up taking a different path to solve.
Below are some places which I missed re ramifications. Did you notice them?
12.22 missed an 8
14.29 missed the 9's
16.24 missed 3 's in vertical blocks
18.31 missed a 4 in r 7 c9
20.02 missed ram in r 6
26.50 missed 2/5 mp in r 5
Although many ramifications were missed, by taking a different path the puzzle was still solved.
20.20 Unique rectangle (danger Danger)
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[@AKHILXD]

Glad to see you man 👨 stay strong wish your health live long🥺🙂💞🌹

[@SudokuGuy]

thanks desi boy I appreciate your support. Please tell others.

[@charissapowell6669]

WOW. I’m learning to keep calm and continue with the steps. Thanks so much

[@SudokuGuy]

Wow! you are moving up and learning many new techniques and tricks.

[@heyitsdez2164]

Thank you for your tutorials. I discovered my love for sadoku because of you :)

[@SudokuGuy]

Happy to hear that! Dez. So glad you found my site."the most popular site online to learn sudoku" Please tell others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. You can view all of my videos here: kzbin.info/door/d8JaOdfEWcJOtwG6YayW0w sudokuguy.com

[@dsremingto]

Nice to see you back. Seem to have been gone a while!

[@SudokuGuy]

Welcome back !I'm not dead yet!

[@andrealaber9692]

Another good puzzle. Thanks!

[@SudokuGuy]

You're welcome Andrea. So glad you found my site."the most popular site on line to learn sudoku" Please tell others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. You can view all of my videos here: kzbin.info/door/d8JaOdfEWcJOtwG6YayW0w sudokuguy.com

[@ykso9826]

Thank you for having shown us how to do another puzzle.

[@SudokuGuy]

My pleasure YK

[@kera2615]

God bless you Sir . You are a HERO

[@SudokuGuy]

Gee Thanks Kera. Thanks for your support. Please tell others about Sudoku Guy.

[@SoRTs6233]

Another good one Robin. I tend to sweep through the rows and columns with TMB and LCR, followed by Cross-meet, just as you taught. I find it can be done quite quickly. Then I start looking for 'other things'. Thanks for clarifying the ambiguity rule. Take care.

[@SudokuGuy]

Thanks for sharing! Robin More tutorials are coming. Please tell your friends.

[@randallmiser2976]

I have herd you say their might be two answers to a puzzle but I can't see how. Maybe you could give an example..😊

[@myfyrmadocjones]

Just finished work and this notification pops up. Looking forward to this!

[@SudokuGuy]

Enjoy Myfyr. Happy learning.

[@myfyrmadocjones]

@@SudokuGuy Great video again, as always! 👍

[@kathytiffin6518]

You are freakin' amazing.

[@SudokuGuy]

Thanks Kathy. Please tell others.

[@junkmailfolder5600]

I can't wait for #100. I hope something special is planned.

[@SudokuGuy]

It is planned Keep watching. Thanks for your support.

[@bhaskarbalasubramaniam7557]

Hi Robin - I am your fan and started doing sudoku watching your tutorials. I found the going tougher when there are 25 or lesser numbers in the beginning of the puzzle. Can you please release tutorials for such puzzles. If you have already done those puzzles please forgive my ignorance and be kind enough to mention the tutorial numbers.

[@SudokuGuy]

Glad to know you wish to learn more. Look at tutorials from #50 to 100 and you will see many examples where I solve starting from just a few numbers. Look at the list of titles. All the best.

[@bhaskarbalasubramaniam7557]

@@SudokuGuy Many thanks for your prompt response and shall definitely go through the lessons suggested by you.

[@vukcevu5854]

Whats is the fastest time in which youve solved hard sudoku?

[@SudokuGuy]

For me I have no idea because I am not interested in hurrying, I am more interested in doing it right.

[@dark_fr0st57]

Hey Sudoku Guy, do you make your own sudokus (handmade)?

[@SudokuGuy]

Yes and no

[@mathstudent76]

I have tried to use Snyder Notation rules to maximum extent in solving. And once I have completed that, in and advanced puzzle, I am not sure the next technique to apply. At 8:57, you added the other 3,8 in a different block. Is it still Snyder Notation at that point? And then you placed 2,3,8 in the two cells. At this point, you are beyond Snyder Notation, right? What would you say generally is the next step after your Snyder Notation is complete?

[@SudokuGuy]

By the time you get to tutorial 93 you have to use a different method.. If you look at tutorial 79 and above you will see a different method being used. It's called "locked litlle numbers" Hope this helps. Robin

[@asherxs]

Do you have a video on the rule for 19:40? Thanks

[@SudokuGuy]

Yes look at tutorial # 94 which will be coming out in Aug. In the meantime go to my home page and look at tutorials called "Danger Danger" The unique rectangle can have to solutions which is not accepted in sudoku.

[@vivekk8083]

Wishing for your health

[@SudokuGuy]

Thanks. Vivek. Robin

[@raghavansubramaniam544]

In tutorial no.93 in column no 6 row no 7 you had three small numbers, 4, 5 and 9 but you selected 9 when you could have chosen 4 or 5. The reason you gave was not audible. Can you please clarify

[@SudokuGuy]

If you continue watching you will hear me say we have to put a 9 there to stop the puzzle having 2 answers. It is called the unique rectangle or as I call it the danger danger. A puzzle cannot have 2 answers. Hope this helps.

[@FranNDR]

19:43 that's indeed a magical rule!

[@SudokuGuy]

Yes Fran it is important to avoid the unique rectangle because you may finish up with 2 answers, which is not a true sudoku

[@SudokuGuy]

Very important to watch for these unique rectangles. I call them Danger Danger in other tutorials.

[@danmenzel7229]

Robin, I laugh every time you say "that was a pun". My ex-wife used to say "that's two thirds of a pun---P.U."

[@SudokuGuy]

Ha ha neat !

[@quiciyanbatu7593]

❤❤❤

[@SudokuGuy]

Compliments of the season I hope you are learning lots. Thanks for your support. Robin

[@ellensquilts3003]

questioni please: WHY DOES IT "HAVE TO BECOME A 9" in what you call the "danger danger" situation. row 7 column 6. 59, 45, 459

[@SudokuGuy]

My suggestion is to look at this part of the puzzle again. By putting in the 9 it saved the 45 45 45 45 possible danger danger from happening Robin

[@Yash0936]

Why are you not uploading video, are you ok sir?

[@SudokuGuy]

Hello Yash. I am uploading videos regularly for 8 years. PLease go to my channel page to see over 140 videos I have made. go to sudokuguy.com, click on the video button which will take you to my channel page. Hope this helps Robin

[@charissapowell6669]

Yes I GOT IT. MATCHING PAIRS. YEA THANKS

[@SudokuGuy]

Way to go charissa. Understand the power of matching pairs is very important. So glad you found my site."the most popular site online to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. For a list of videos go here: kzbin.info/door/d8JaOdfEWcJOtwG6YayW0w sudokuguy.com

[@michaelwirth6843]

19.45 Why does the 4, 5, 9 combination has to be 9?

[@SudokuGuy]

Good question the same reason as the 2 had to b e put in earlier. The 9 must be there to stop a Danger Danger situation where there could b e 2 answers. A sudoku puzzle must never have 2 answers

[@nandalala12]

23:44 how???

[@SudokuGuy]

I think you have looked ahead without looking at my earlier videos. Below is a link which will take you to my list of all the videos which teach you step by step. matching pairs play a very important part when solving sudoku. Look at lessons 3 to 12 to learn about these. So glad you found my site."the most popular site online to learn sudoku" Please share with others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. For a list of videos go here: kzbin.info/door/d8JaOdfEWcJOtwG6YayW0w sudokuguy.com

[@g_dhumanbeing2015]

Why two 4 in diagonal

[@SudokuGuy]

I'm not sure what you mean, and could you let me know the minute you are referring to.I'd be happy to help.

[@guill3978]

Is it better to make a procedure?

[@SudokuGuy]

Good question . Essential for learners for the first part of solving further on in the puzzle if it is difficult you then have to look around more.. Look at my recent videos and you will see the to begin with I have a procedure. later when I look for e.g. triplets then I could be looking all over the puzzle. Robin

[@AnonimityAssured]

I think a procedure would greatly slow down the solving of this grid, which is pretty easy for the first 30-odd steps, just by following the numbers. The crunch point presents two URs, although one of them is a dead end (28 = row 2 column 8): 28, 33, 39, 35, 31, 11, 25, 37, 79, 77, 99, 17, 93, 85, 24, 15, 27, 29, 18, 49, 69, 52, 75, 81, 73, 86, 58, 68, 53, 48, 45, 64, 41, 95 (UR, boxes 2 and 8)*, 71, 92, 76, 74, … * A UR in boxes 4 and 7 yields R6C7, but then nothing else. Without a UR: 92 instead of 95 (colours on 5s from this cell), 95, 46, 34, 36, …

[@SudokuGuy]

Thank you for sharing Julian

[@zen_art_of_guardian_sudoku]

As you know Julian, I gain most enjoyment of sudoku when beginning by just letting the numbers 'hit my eye' (i.e. definitely no system to start the grid). I'm not saying playing without a system is more efficient, but (and here this might be based on personality) a random start feels good. I think it's "horses for courses".

[@AnonimityAssured]

​@@zen_art_of_guardian_sudoku Yes, I think some people need some sort of procedural approach in order to be able to cope with the flow of incoming information without becoming overwhelmed. But such an approach is inherently inefficient and slow in comparison to simple number following (see some 5s, follow the 5s, etc.). Indeed, it's not difficult to devise a grid that strongly penalizes counting and cycling, which are the two main features of typical solving procedures.

[@SudokuGuy]

I suggest you look at Sept tutorial coming as I discuss this whole subject and solve a hard puzzle without small small

[@kaylemoine1571]

Procedure, Procedure, procedure.

[@SudokuGuy]

You go it. It really helps for learners. So glad you found my site."the most popular site on line to learn sudoku" Please tell others, subscribe and click the bell by the subscribe button. Have fun as you learn step by step how to solve. You can view all of my videos here: kzbin.info/door/d8JaOdfEWcJOtwG6YayW0w sudokuguy.com

[@ellensquilts3003]

hmm. i read your answer, "to avoid danger" but I don't see why that's a logical step. the creator of the puzzle should see to these snafus, shouldn't he?

[@SudokuGuy]

May be, but the solver has to be aware of the danger danger. situation.

[@joysaha2506]

You are solving very very very easy suduko puzzles

[@SudokuGuy]

Hello Joy. They may be easy for you but not for the beginner.