This link appears to be dead, and to redirect to https://www.helsinki.fi/fi/laaketieteellinen-tiedekunta/kansanterveystieteen-osasto, which is the Finnish version of https://www.helsinki.fi/en/faculty-of-medicine/department-of-public-health ; the site has no information on Matti Siivola.
More useful links:
- http://www.helsinki.fi/~msiivola/ — Matti’s old home page, linking to the above dead link as a new home page as of 1998-05-04!
- http://www.helsinki.fi/~msiivola/go.html — Matti’s old Go page, last updated 2009-01-07, when he had been president of the Finnish Go Association? and was chairman of the rules and ratings commission of the European Go federation.
- Has links for five rules beasts, mostly to textual representations.
- https://www.cs.cmu.edu/~wjh/go/rules/siivola.html — Four of Matti’s five rules beasts as better-looking diagrams.
- The following position is missing there, taken from his text version at http://www.helsinki.fi/~msiivola/tilanne5.html: