Lothar Maximilian Lorenz Schmid (10 May 1928 – 18 May 2013) was a German chess grandmaster. He was born in Radebeul near Dresden into a family who were the co-owners of theKarl May Press, which published the German Karl May adventure novels.He was best known as the chief arbiter at several World Chess Championship matches, in particular the 1972 encounter between Bobby Fischer and Boris Spassky at Reykjavík. He was also an avid collector of chess books and paraphernalia.