Summary of The Chromatic Octagon

00:00:00 - 00:45:00

The Chromatic Octagon is a tool that can be used to help solve Sudoku puzzles. In the video, the presenter goes through a Sudoku puzzle and explains how the colors relate to the digits in the grid. They eventually find the color that needs to be written into the bottom purple dark blue pair, red.

• 00:00:00 The Chromatic Octagon is a popular puzzle that has been recommended by a number of people. This puzzle is difficult, but should be easier than the puzzle called "Double the Heat." There is a new monthly reward on Patreon, which is a hunt for Setters behind the pyramid puzzle. There are also birthday celebrations going on.
• 00:05:00 Eric Rathbun reads the rules of the Chromatic Octagon, which involve normal Sudoku rules applying in cages, digits cannot repeat, and must sum to the small clue in the top left corner of the cage. He then gives examples of how the octagon can be used to solve Sudoku puzzles. Finally, he mentions that one of the secrets of the Chromatic Octagon is that the digits one to nine sum up to 45.
• 00:10:00 This YouTube video discusses how to disambiguate colors in a Sudoku grid using symmetry. Six colors are discussed, with each color having its own unique way of being disambiguated. The video finishes by discussing how to solve the Sudoku grid using these disambiguated colors.
• 00:15:00 The Chromatic Octagon video is about the fact that some digits in a number have nothing in common with others. For example, 30 has 9876 as one digit, but green (a little surprising) has broadly high digits. The video suggests that the way to appreciate this difference is to use the digits that the person has managed to at least disambiguate. Yellow is in one of these two positions, and brown is in one of these three positions. The video then says that blue is not likely to be in this cage, because it is on the palindrome. Finally, the video says that gray is something that the person might be able to appreciate by reference to the digits on the palindrome.
• 00:20:00 The video discusses how to create a chromatic octagon using the same logic as Sudoku, with the black and purple digits corresponding to each color. The video concludes by showing how the octagon has been created, and how the purple black and purple white digits correspond to each other.
• 00:25:00 In the video, Purple Black is said to be "quite," but is not actually "done." The video then goes on to explain how to color everything else in the box using Green Black logic. Finally, the video explains how to color the middle color using a new color, light green.
• 00:30:00 The video discusses how to solve a Sudoku puzzle using the Chromatic Octagon. The chromatic octagon is a tool that can be used to help solve Sudoku puzzles. The video explains how to solve a puzzle using the chromatic octagon and how to identify the colors that need to be used.
• 00:35:00 In the video, the presenter goes through a Sudoku puzzle and explains how the colors relate to the digits in the grid. They eventually find the color that needs to be written into the bottom purple dark blue pair, red.
• 00:40:00 The video discusses how to create and use a Chromatic Octagon, which is a periodic table-style grid that displays colors using only numbers. The grid has cages with 25 and 26 gauges, each of which has one color. Using Sudoku digits, only one digit in each cage can be the same. If a dotted number isn't in one of the cages, it must be the number one or two. By solving this problem, the colors of the Octagon can be calculated.
• 00:45:00 In this video, Eric Rathbun demonstrates how to solve a chromatic octagon using color theory. He starts by identifying the colors that are in the cages (one and two, light blue, gray, brown, purple, and blue), and then attaches the appropriate digits to the dots. Once all the digits are attached, he solves the octagon by doubling click the blue and purple dots, and making the sixes and eightes.