| Hans Berliner | |
|---|---|
| Full name | Hans Jack Berliner |
| Country | United States Germany |
| Born | January 27, 1929 Berlin, Germany |
| Title | International Master |
Hans Jack Berliner (born Berlin, Germany, January 27, 1929), a Professor of Computer Science at Carnegie Mellon University, is a former World Correspondence Chess Champion, from 1965–68. He is a Grandmaster of Correspondence Chess, and an International Master for over-the-board chess. He directed the construction of the chess computer HiTech. Berliner is also a chess writer.
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Berliner was born in Berlin. When he was eight years old his family moved to America to escape Nazi persecution, taking up residence in Washington, D.C.. He learned chess at age 13, and "it quickly became his main preoccupation."
Berliner is mentioned in "How I Started To Write", an essay by Carlos Fuentes, where he is described as "an extremely brilliant boy", with "a brilliant mathematical mind". "I shall always remember his face, dark and trembling, his aquiline nose and deep-set, bright eyes with their great sadness, the sensitivity of his hands..."[1]
In 1949, he became a master, won the District of Columbia Championship (the first of five wins of that tournament) and the Southern States Championship, and tied for second place with Larry Evans at the New York State Championship. He also won the 1953 New York State Championship (the first win by a non-New Yorker), the 1956 Eastern States Open directed by Norman Tweed Whitaker in Washington, D.C., ahead of William Lombardy, Nicolas Rossolimo, Bobby Fischer (at age 13) and Arthur Feuerstein, and the 1957 Champion of Champions tournament.[2][3]
Berliner played for his country's Olympiad team at Helsinki 1952, drawing his only game on the second reserve board.[4] Berliner played four times in the US Chess Championship. In 1954 at New York, he scored 6.5/13 to tie 8–9th places; Arthur Bisguier won. The last three times Berliner played in the U.S. Championship, Fischer won the tournament. In 1957–58 at New York, Berliner had his best result, 5th place with 7/13. In 1960–61 at New York, he scored 4.5/11, tying for 8th–10th place. Finally in 1962–63 at New York, he scored 5/11 for a tied 7th–8th place.[2]
Berliner was talented at all aspects of chess. He gave a multi-board blindfold simultaneous exhibition at the Washington Chess Divan, winning all six games against top local players.
| This section uses algebraic notation to describe chess moves. |
Berliner is remembered most for his feats in correspondence play, most notably his victory in the 5th World Correspondence Chess Championship in 1965. He won with the extraordinary score of 14/16 (twelve wins, four draws), a margin of victory of three points, thrice that of any other winner in these championships.[5]
Berliner's game in which he played the Two Knights Defense to defeat Yakov Estrin in the 1965 World Correspondence Chess Championship is one of the most famous and important games in correspondence chess.[6][7]
As of March 31, 2005, Berliner still had by far the highest International Correspondence Chess Federation (ICCF) rating of any player in the United States, at 2726, 84 points above the second-highest rated player.[8] Berliner's 2726 rating places him third on the ICCF's world list, behind Joop van Oosterom (2741) and Ulf Andersson (2736).[9]
In his 1999 book The System, Berliner claimed that the move 1.d4 gives White a large, and possibly decisive, advantage.
While programming HiTech, Berliner was having trouble implementing board evaluation. He decided that to explore the problem, he should write an evaluation function for another game: backgammon. The result was BKG 9.8, written in the late 1970s on a DEC PDP-10. Early versions of BKG played badly even against poor players, but Berliner noticed that its critical mistakes were always at transitions. He applied principles of fuzzy logic to smooth out the transition between phases, and by July 1979, BKG 9.8 was strong enough to play against the ruling world champion Luigi Villa. It won the match 7–1, becoming the first computer program to defeat a world champion in any game. Berliner states that the victory was largely a matter of luck, as the computer received more favorable dice rolls.[10]
He also developed the B* search algorithm for game tree searching.
Berliner currently lives in Florida, and has worked to help develop computer chess programs in his later years.
| Preceded by Vladimir Zagorovsky |
World Correspondence Chess Champion 1965–1968 |
Succeeded by Horst Rittner |