Einstein’s publication in the ‘Annalen der Physik’ urged many scientists to work. Did you know that there are five *different* Schwarzschild Solutions? How do you know which one is right? This article presents you three ways to check the outcome: The General Relativity Principles, the GR field equations and the Laplace operator.

The outcome is surprising and disappointing: non of them is 100% correct.

So there is some repair work to do. The necessity is illustrated in this article.