In the first video I was trying to keep the terminology to a minimum. But when I was working with someone learning the Skyscraper I realized I had to introduce the concept of chute. I'm going to do additional tutorials for some other techniques using links and chaining in the discussion. Eventually, I'm going to start working with more advanced chaining techniques later in the year.
I just realized at the 2:30 mark in the video where I talk about the 4 different orientations when I meant to say is 4 different orientations for the location of the base of the Skyscraper. If you take into account the tall side of the Skyscraper versus the small side of the Skyscraper then each of the 4 base orientations has a tall-side on the left and tall-side on the right. So there are actually a total of 8 orientations if you take into account the side orientations.
I found a slight error in this tutorial at the 10:16 mark. I go on to say there is an essentially an Either-Or link between the possible 9 candidates in cell R1C7 and cell R6C9. Since both cells R1C7 and R6C9 can both have a value of 9 at the same time it is NOT an Either-Or link. What we have here is a bi-directional Strong link between two cells with the possible 9 candidate. The diagram shows it correctly. I've starting using a double arrow-ended line to represent the Either-Or link and a line with no arrows to represent a bi-Direction Strong Link.
Nice video. I like how you point out that for a skyscraper to be effective, it needs to be in 2 separate chutes.
In the first video I was trying to keep the terminology to a minimum. But when I was working with someone learning the Skyscraper I realized I had to introduce the concept of chute. I'm going to do additional tutorials for some other techniques using links and chaining in the discussion. Eventually, I'm going to start working with more advanced chaining techniques later in the year.
I just realized at the 2:30 mark in the video where I talk about the 4 different orientations when I meant to say is 4 different orientations for the location of the base of the Skyscraper. If you take into account the tall side of the Skyscraper versus the small side of the Skyscraper then each of the 4 base orientations has a tall-side on the left and tall-side on the right. So there are actually a total of 8 orientations if you take into account the side orientations.
I found a slight error in this tutorial at the 10:16 mark. I go on to say there is an essentially an Either-Or link between the possible 9 candidates in cell R1C7 and cell R6C9. Since both cells R1C7 and R6C9 can both have a value of 9 at the same time it is NOT an Either-Or link. What we have here is a bi-directional Strong link between two cells with the possible 9 candidate. The diagram shows it correctly. I've starting using a double arrow-ended line to represent the Either-Or link and a line with no arrows to represent a bi-Direction Strong Link.