Sources of Tsumego

[MikeKyle]

(Please excuse me if theres already a similar thread, I couldn't see anything recent when i searched)

I'm trying to get into a more regular tsumego regime and I wondered where people are getting their problems from.

I use:

Tsumego pro - app for android - I like the 6 daily problems, the rest of the app seems to feed me the same problems a lot.

101weiqi.com - chinese language website including nice tsumego tools - Someone made me aware of this recently and I really like it so far. In chinese so I have to do a lot of google translating.

..and I use some Japanese tsumego pocket books, but these are a bit easy for me.

I'm interested in both print and digital sources of problems. I prefer print really, but computers can do some clever stuff like adapting to your level.
In particular I'd be interested if anyone knows of a really good souce of tesuji problems (I always find those extra fun.)

What's your source?
Do others use 101weiqi, what's your experience?

[seberle]

Like you, I like the Tsumego Pro app and use it daily.

I used to use goproblems.com and gochild2009.appspot.com, but since they're not completely free, I haven't used them lately. I'm also working through the book series "Graded Go Problems for Beginners."

Recently I discovered Tsumego Hero (tsumego-hero.com), which I really like.