![](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Stefan_Meyer-Kahlen.jpg/220px-Stefan_Meyer-Kahlen.jpg)
Stefan Meyer-Kahlen (born 1968, in Düsseldorf) is a German programmer of the computer chess programs Shredder and the entire Zappa series. As of January 2017, his program has won 18 titles as World Computer Chess Champion; four of these titles were blitz championships, and one was a Chess960 championship. He also invented the Universal Chess Interface, a chess engine protocol.
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