Kernrechtsfrage
Whether Swiss courts had jurisdiction under Art. 113 IPRG at the place of performance for the disputed contractual claim.
Extrahierter Entscheid
No. The place of performance is determined by the disputed primary obligation underlying the claim, not by any other agreed or ancillary performance; here the disputed reinsurance payment was not shown to be due in Switzerland.
Extrahierte Begründung
When contractual validity is challenged for dissensus, the relevant performance place is that of the essential obligation actually in dispute. A claimant cannot create jurisdiction by relying on an undisputed counter-performance or by selecting any contractual main obligation; otherwise jurisdiction would be multiplied and turned into a general forum for the claimant.