Life In 19x19

I'm a beginner go student, and I'm trying to find some freeware software that solves tsumego problems. It is not really important, but is quite surprising that I cannot find any...
The most promising is XuanXuan , which states on its page that tsumego resolver is free from version 9 : but even after ...

Thanks for the answers !
I didn't know about the AGA rules... it is very interesting that "Repeated Board Position" rule...
I have tooooo much to learn

thank you very much Pio2001 for the material confirmation!

So, it is a "proper" seki, even having a "cycle" of mutual attack and defense in it?

PS:
Yeah, the book is good: with it I'm starting to understand the game after various previous unfruitful attempts

Thanks Uberdude, you're right, it seems the most plausible "patch".

I think I didn't find it, because it is kind of a seki with cycle, because after black B2,
white can play A1, forcing black to play C1 capturing, forcing white to play A2 to capture A3,
returning then to the position after the ...

Hi,
I think this exercise in "baduk for beginners" (Kim Sung-rae) (p 140, Spanish edition) is not correct:
Black moves: Find the movement that creates seki:
$$B "baduk for beginners" (Kim Sung-rae) p 140 \nFind the movement that creates seki ...