This doesn’t work well, because of this:

“This requires to be able to work on a couple of problems at the same time.”

...which is a really bad idea, because context-switching carries a heavy productivity penalty. Many studies show this clearly: even though people may feel more productive when multi-tasking, they actually are much less productive, and the solutions they come up with to complex problems are more likely to be wrong because they haven’t spent as much time in the same context (i.e. asked for help, couldn’t get any on time, was forced to switch to another task/problem).