Life In 19x19

Anyone worked through the Wbaduk problems?

I have a 3 dan account on this wonderful server, but i found even the 2-5 kyu problems challenging. So, I started from the very bottom with the problems. I now finished the 19-15 kyu set I can solve them , but even a lot of those are not easy at all (i have to stop look at it, visualize and not just glance and solve them) and I wouldn't be surprised to see them misplayed during a game. Are the 3-7dan problems solvable at all? Has anyone the same problem or is it just me being too weak?

The problems are indeed quite tricky. I can see why koreans have renown for strong fighting, while we westerners just focus on playing proper moves. I find 14k-10k problems challenging enough!