Welcome back. It was a pleasant surprise to see this lesson in my feed today. But I have to watch the three prerequisite lessons before watching this one. Regardless it was still good to see that you’re still imparting your sudoku knowledge and wisdom upon us novices!
Thanks for the video. It’s interesting that you equate finned x-wing as cross between x-wing and skyscraper. I hadn’t looked at it that way. I just see it as a weaker form of x-wing. I used to have a hard time identifying the kill zone but using the strong link candidates as a guide helped me see the fins and kill zone much quicker. Have you seen an overlap with this technique and empty rectangles or 2-string kites? I sometimes do but I didn’t see in any of your exercises where the candidates could be eliminated using another technique.
No, I haven't seen one like you are suggestion. Please post a link here to an Imgur image so I can see what you are talking about. And thanks for the thanks!
@@dxsudokuchannel imgur.com/StCLLra Check this diagram out. Finned X-Wing on columns 2 and 4, or Empty Rectangle out of Block 2, will eliminate 2 in R9C6. I came across this while making my video about Empty Rectangles.
@@SmartHobbies This does not surprise me. At first I thought constellations of givens each had a unique solution path. But this is not the case. As puzzles become more advanced there are often more than one technique to solve a puzzle at a certain point. Check out this threaded discussion on Reddit. At this point in the puzzle people found 3 different ways of solving it (XY-Wing, W-Wing, and XY-Chain): www.reddit.com/r/sudoku/comments/meyp3y/whats_the_next_step_other_than_brute_force/ You found an interested pair of techniques with your puzzle. What is interesting about Empty Rectangle is it's a variant of the X-Chain. Except one of the links is a Group-Link. I used to look for Empty Rectangles but I'm now so used to looking for X-Chains in puzzles with Group-Links I just don't even think about it. It's all single -digit chaining is how I see it. 2-String Kites and Skyscrapers are also variants of the X-Chain. But for some reason I still find looking for 2-String Kits and Skyscrapers easier than X-Chains. So I usually look for those before X-Chains.
Is *blinking frame* neat when you're talking about a particular cell? No, it's a *tremendous advantage!* Cell coordinates speaking combined with mentioned cell marking is what students need because of bichannel brain attack.
Group nodes are extremely powerful. I just found a really need 10-Node X-Chain which had two group nodes in it! Here's a link to the Reddit discussion: www.reddit.com/r/sudoku/comments/wr8cnx/i_found_a_really_cool_10_node_xchain_nice_loop/ You should join this Reddit forum. It's fun and people post some interested stuff. I plan to do a video on the 10-Node x-Chain as my next video. I'm also currently working on a video for an improved version of Bowman's Bingo.
@@dxsudokuchannel I found today again a trace of Bowman's Bingo. Let's see into your video #101, mark 0:23. You wrote there: "Bivalue Elimination Part 1 *(aka Bowman's Bingo)* ". Did you forgot it?? Is there your *Bowman's Bingo* lession or not?
@@danielkoziarski8488 It's coming. It's going to be a while. I'm collating a lot information from other videos. I may do a few easier videos instead for the near future. My other problem is I'm trying to get the eBook version of my second Sudoku book done by the end of September. It has about 2000 hyperlinks within the eBook. It's a lot of work. The second book has a lot really cool puzzles in it. There's a one puzzle with 9 X-Chains in it! And there's one puzzle with 7 XY-Wings in it. Plus 16 puzzles each with 3 Swordfish per puzzle. Weird stuff. Here's a link to the second book in paperback: www.amazon.com/gp/product/1736452614/ref=dbs_a_def_rwt_hsch_vapi_taft_p1_i1 Sorry about the Bowman's Bingo being delayed. I also just came up with an improved version of my algorithm for finding Hidden Triples. So I feel a like I may do an updated Hidden Triple video before Bowman's Bingo. The Bivalue Elimination Part I and Part II are still very good videos on this topic.
The extreme techniques take longer. But I was distracted by finishing the final editing of my first sudoku book with my editor. Final draft is printing this week. I hope it will be published within a few weeks. I am just amazed by how much work went into it!
@@SmartHobbies I use puzzle generators for everything. I tried to talk more about game theory and puzzle techniques. I do include practice exercises. I wanted to try to keep the puzzle part small and keep the price low. I'll post more about it once it's available.
What sense makes distinguishing between Finned and Sashimi X-Wing? Why to handle these separately? The logic and searching scheme is not really different. Even the kill zone location is the same. Every student learning about Finned X-Wing should come to know, that *Sashimi X-Wing is for free!*
You are absolutely correct! In one of the videos I even stated it. There is no reason to look for Finned X-Wings, Sashimi X-Wings, or Empty Rectangles. Instead, just look for X-Chains and include Group Nodes in with the search process. And this includes Group Nodes in every possible direction as in this Reddit post: www.reddit.com/r/sudoku/comments/wr8cnx/i_found_a_really_cool_10_node_xchain_nice_loop/ This post shows a 10 node X-Chain with 2 group nodes I found while playing Andoku 3 as I was watching TV. Here's an updated tutorial I did on my latest and most improved X-Chain search algorithm: ua-cam.com/video/di1aM5X0h6Y/v-deo.html You are really flying through this stuff! Keep up the good questions! Make sure you understand the idea about "Chutes" is Sudoku. Take a look at this video: ua-cam.com/video/gYEH71PVdpY/v-deo.html You should master links, chains, and chutes and then you will be ready for the advanced chaining techniques. Make sure you learn about the different types of links: ua-cam.com/video/cVwV3MXXx5c/v-deo.html Keep up the good work!
@@dxsudokuchannel Thank you very much for quick response and tips about "Chutes", links and chains! 🙂 However, this time I cannot agree with you in some topics: 1. I believe you have meant "Skyscraper" (instead of "Empty Rectangle" method). 2. Skyscraper has exactly four cells and provides "doubled" kill zone. These cells form nearly a rectangle, which is easier to understand and to traverse than a chain. 3. From student's point of view: Finned X-Wing and Sashimi X-Wing are different from Skyscraper: -- half size kill zone, -- the sequence ends with a new term named "group of nodes/cells" instead of a single cell. 4. X-Chain technique exercising is on my "to-do" list as of yet. I have seen on reddit your hunting trophy with 10 node X-chain! It looks really impressive 💪, but I'm not at home with X-Chain when it comes to continuation choosing from alternatives. An X-Chain consists of several steps... Finned/Sashimi X-Wings have closed character and occur with always same amount of steps, which is easier to grip on my current level.
@@danielkoziarski8488 The Empty Rectangle is an X-Chain with a group node. These are all variants of the X-Chain: X-Wing, Skyscraper, 2-String Kite, Empty Rectangle, Finned X-Wing, and Sashimi X-Wing. Since Skyscrapers and 2-String kites are so easy to see the pattern always look for the pattern first. But normally I don't look for Empty Rectangles, Finned X-Wings, and Sashimi X-Wings. For those, I only look for X-Chains and add group nodes where ever and whenever possible. The Kill zone with the X-Chain is any cell sharing a house with 2 cells in the chaining sequence with one of each of the two chaining colors. The bottom line is for any of these patterns, whatever you feel the most comfortable doing is the best approach. There's nothing wrong with any of your comments. Just keep practicing. It's all good.
Welcome back. It was a pleasant surprise to see this lesson in my feed today. But I have to watch the three prerequisite lessons before watching this one. Regardless it was still good to see that you’re still imparting your sudoku knowledge and wisdom upon us novices!
1/2 the time I learn by making mistakes and the other half of the time I just get lucky!
Thanks for the video. It’s interesting that you equate finned x-wing as cross between x-wing and skyscraper. I hadn’t looked at it that way. I just see it as a weaker form of x-wing. I used to have a hard time identifying the kill zone but using the strong link candidates as a guide helped me see the fins and kill zone much quicker.
Have you seen an overlap with this technique and empty rectangles or 2-string kites? I sometimes do but I didn’t see in any of your exercises where the candidates could be eliminated using another technique.
No, I haven't seen one like you are suggestion. Please post a link here to an Imgur image so I can see what you are talking about. And thanks for the thanks!
@@dxsudokuchannel imgur.com/StCLLra Check this diagram out. Finned X-Wing on columns 2 and 4, or Empty Rectangle out of Block 2, will eliminate 2 in R9C6. I came across this while making my video about Empty Rectangles.
@@SmartHobbies This does not surprise me. At first I thought constellations of givens each had a unique solution path. But this is not the case. As puzzles become more advanced there are often more than one technique to solve a puzzle at a certain point. Check out this threaded discussion on Reddit. At this point in the puzzle people found 3 different ways of solving it (XY-Wing, W-Wing, and XY-Chain):
www.reddit.com/r/sudoku/comments/meyp3y/whats_the_next_step_other_than_brute_force/
You found an interested pair of techniques with your puzzle. What is interesting about Empty Rectangle is it's a variant of the X-Chain. Except one of the links is a Group-Link. I used to look for Empty Rectangles but I'm now so used to looking for X-Chains in puzzles with Group-Links I just don't even think about it. It's all single -digit chaining is how I see it. 2-String Kites and Skyscrapers are also variants of the X-Chain. But for some reason I still find looking for 2-String Kits and Skyscrapers easier than X-Chains. So I usually look for those before X-Chains.
Is *blinking frame* neat when you're talking about a particular cell? No, it's a *tremendous advantage!*
Cell coordinates speaking combined with mentioned cell marking is what students need because of bichannel brain attack.
Group nodes are extremely powerful. I just found a really need 10-Node X-Chain which had two group nodes in it! Here's a link to the Reddit discussion:
www.reddit.com/r/sudoku/comments/wr8cnx/i_found_a_really_cool_10_node_xchain_nice_loop/
You should join this Reddit forum. It's fun and people post some interested stuff. I plan to do a video on the 10-Node x-Chain as my next video. I'm also currently working on a video for an improved version of Bowman's Bingo.
@@dxsudokuchannel What is the number of your Bowman's Bingo lesson video until now? I can't find it again...
@@danielkoziarski8488 It's not out yet. I am currently working on it.
@@dxsudokuchannel I found today again a trace of Bowman's Bingo. Let's see into your video #101, mark 0:23. You wrote there: "Bivalue Elimination Part 1 *(aka Bowman's Bingo)* ".
Did you forgot it??
Is there your *Bowman's Bingo* lession or not?
@@danielkoziarski8488 It's coming. It's going to be a while. I'm collating a lot information from other videos. I may do a few easier videos instead for the near future. My other problem is I'm trying to get the eBook version of my second Sudoku book done by the end of September. It has about 2000 hyperlinks within the eBook. It's a lot of work. The second book has a lot really cool puzzles in it. There's a one puzzle with 9 X-Chains in it! And there's one puzzle with 7 XY-Wings in it. Plus 16 puzzles each with 3 Swordfish per puzzle. Weird stuff. Here's a link to the second book in paperback:
www.amazon.com/gp/product/1736452614/ref=dbs_a_def_rwt_hsch_vapi_taft_p1_i1
Sorry about the Bowman's Bingo being delayed. I also just came up with an improved version of my algorithm for finding Hidden Triples. So I feel a like I may do an updated Hidden Triple video before Bowman's Bingo. The Bivalue Elimination Part I and Part II are still very good videos on this topic.
Wow! A new video. It has been a while. This video must have taken you a lot of time to make
The extreme techniques take longer. But I was distracted by finishing the final editing of my first sudoku book with my editor. Final draft is printing this week. I hope it will be published within a few weeks. I am just amazed by how much work went into it!
@@dxsudokuchannel let us know when the book comes out. Did you create the puzzles yourself?
@@SmartHobbies I use puzzle generators for everything. I tried to talk more about game theory and puzzle techniques. I do include practice exercises. I wanted to try to keep the puzzle part small and keep the price low. I'll post more about it once it's available.
@@dxsudokuchannel Awesome, thank you. I'm looking forward to it.
What sense makes distinguishing between Finned and Sashimi X-Wing? Why to handle these separately?
The logic and searching scheme is not really different. Even the kill zone location is the same.
Every student learning about Finned X-Wing should come to know, that *Sashimi X-Wing is for free!*
You are absolutely correct! In one of the videos I even stated it. There is no reason to look for Finned X-Wings, Sashimi X-Wings, or Empty Rectangles. Instead, just look for X-Chains and include Group Nodes in with the search process. And this includes Group Nodes in every possible direction as in this Reddit post:
www.reddit.com/r/sudoku/comments/wr8cnx/i_found_a_really_cool_10_node_xchain_nice_loop/
This post shows a 10 node X-Chain with 2 group nodes I found while playing Andoku 3 as I was watching TV. Here's an updated tutorial I did on my latest and most improved X-Chain search algorithm:
ua-cam.com/video/di1aM5X0h6Y/v-deo.html
You are really flying through this stuff! Keep up the good questions! Make sure you understand the idea about "Chutes" is Sudoku. Take a look at this video:
ua-cam.com/video/gYEH71PVdpY/v-deo.html
You should master links, chains, and chutes and then you will be ready for the advanced chaining techniques. Make sure you learn about the different types of links:
ua-cam.com/video/cVwV3MXXx5c/v-deo.html
Keep up the good work!
@@dxsudokuchannel Thank you very much for quick response and tips about "Chutes", links and chains! 🙂
However, this time I cannot agree with you in some topics:
1. I believe you have meant "Skyscraper" (instead of "Empty Rectangle" method).
2. Skyscraper has exactly four cells and provides "doubled" kill zone. These cells form nearly a rectangle, which is easier to understand and to traverse than a chain.
3. From student's point of view: Finned X-Wing and Sashimi X-Wing are different from Skyscraper:
-- half size kill zone,
-- the sequence ends with a new term named "group of nodes/cells" instead of a single cell.
4. X-Chain technique exercising is on my "to-do" list as of yet.
I have seen on reddit your hunting trophy with 10 node X-chain! It looks really impressive 💪, but I'm not at home with X-Chain when it comes to continuation choosing from alternatives. An X-Chain consists of several steps... Finned/Sashimi X-Wings have closed character and occur with always same amount of steps, which is easier to grip on my current level.
@@danielkoziarski8488 The Empty Rectangle is an X-Chain with a group node. These are all variants of the X-Chain: X-Wing, Skyscraper, 2-String Kite, Empty Rectangle, Finned X-Wing, and Sashimi X-Wing. Since Skyscrapers and 2-String kites are so easy to see the pattern always look for the pattern first. But normally I don't look for Empty Rectangles, Finned X-Wings, and Sashimi X-Wings. For those, I only look for X-Chains and add group nodes where ever and whenever possible. The Kill zone with the X-Chain is any cell sharing a house with 2 cells in the chaining sequence with one of each of the two chaining colors. The bottom line is for any of these patterns, whatever you feel the most comfortable doing is the best approach. There's nothing wrong with any of your comments. Just keep practicing. It's all good.