- Chess World Cup
- FIDE Grand Prix
- Olympiad
- World Championship
- List of strong tournaments
- List of world championships
- Checkmate patterns
- Chess openings
- Chess strategy
- Chess tactics
- Chess theory
- Endgames
- Pawn structure
- Problems/Compositions
Ernest Ludwig Klein (1910-1990) was an Austrian-British chess master and author.
Born in Vienna into a Jewish family, he emigrated to the United Kingdom in 1930s. He tied for 3rd-4th at Győr 1930 (Isaac Kashdan won), lost a match to Savielly Tartakower (1 : 3) at Paris 1935, tied for 4-5th at Margate 1935 (Samuel Reshevsky), and was unofficial Alexander Alekhine's second in his World Championship match against Max Euwe in 1935.
He tied for 5-6th at Hastings 1938/39 (László Szabó won), shared 2nd with Salo Flohr, behind Euwe, at Bournemouth 1939.
After World War II, he tied for 9-10th at Birmingham 1951 (Staunton Memorial, won by Petar Trifunović and Vasja Pirc), and won the British Championship in 1951.