This set of problems is solved at a glance by dan players, which implies dan players have these patterns permanently stored in their mind readily available when needed. So, if you are a kyu player go over them and learn them and you close some of the gap which separates you from a dan player. Dan players shouldn't skip these problems but should use them to warm up the brain to solve other problems or maybe go over them before playing a Go game, just to get sharp. My estimation is that the problems are around the 10-5 kyu level. Good luck!

Jan van der Steen, 2003-05-26

Collection overview
Currently, there is only one sets of problems at the following level: