Szolnok/Szeged/Espelkamp. At the beginning of March, Merkur Casino, the successful arcade chain of the German Gauselmann Group that operates in all of Europe, opened a new entertainment center under the brand name “Merkur Spielo“ in the city of Szolnok, 100 km to the east of Budapest. The city with a population of approximately 78,000 is located in the heart of the Hungarian plain.