I do not know that pattern, but I noticed a few things about the construction.
1. Those blocks have a sashing. One row's thickness with a single square at the corners.
2. The first round after the center block looks like a standard chimneys and cornerstones pattern.
3. I did find this tutorial, which is similar but not quite the same in proportions. It's called "converging corners":
http://www.filminthefridge.com/2012/...ck-a-tutorial/
4. I don't think you can chain stitch these blocks like you would normally do a log cabin pattern. Looks like each one is individually made because of the precise measurements of the sides. Notice how the dark colors step by the same amount in each successive round? Looks like increments equal to the width of each round. Tedious!
It is a beautiful effect, though, like a log cabin Irish chain. Hope you find more help!
ETA: Just read some of the other posts and realized I've reiterated some. Oh well, at least I can feel like the link added a little value
