Nikoli Puzzles...

Assuming it's OK to talk about other puzzle types on here, does anyone else use the Nikoli site?

Although I don't subscribe it's useful for finding out about new puzzle types, some of which make their way over here. There are also free samples of quite a few puzzle types so it is well worth a visit.

One of the puzzle types I've seen recently is another loop type puzzle that they call suraromu under their puzzles section:

http://www.nikoli.co.jp/en/puzzles

It's a fairly simple one but nice to play.