In for a penny, in for a pound? After adding Google's 'Matched Content' to 25 pages last week, I added the same function to another 75 pages, making 101 pages in total. Until now, the only matched pages I've seen have been from my About.com CFAA content, but the following example (a TMER page) shows one matched page from my World Championship site, i.e. the 2015 World Cup.
Magnus Carlsen's TMER (2000-)
TMER = Tournament, Match, and Exhibition Record
It appears that all pages which can be linked via matched content have at least one image associated with the link to that page. That means pages without images, like the Carlsen TMER itself, would never show up as matched content.
Note also the link to Chess Tactics Illustrated ('French postcards illustrate basic tactical themes in chess'). This is an example of an image gallery, all of which use an architecture unlike the basic About.com pages.
I should also mention pages like Chess Openings - Initial Position ('Repertoire recommendations'). These have more Google functionality -- ads plus matched content -- than they have their own content, which is not at all what I want. TBA?