It was a Pitman 1950 book that later got famous as a 1966 Dover book. and well only the introduction is new!
I think the last game annotated was 1947
I've seen one review where they said it was a brilliant book that 'became the model for most chess writing for 50 plus years', which I'm no sure about.
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Maybe it was the first book not written by Reinfeld or Horowitz back in the 50s which were largely mediocre. Though i think some of their books weren't that bad as how some remember it.
Korn is unusual for being the Editor of Modern Chess Openings - 7th Edition to the 12th Edition
Yet there are no records of him playing in any chess tournaments!
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He went from Prague to London in 1939, Moved to Detroit in 1950. Died in the 1990s in San Mateo, California Chess books 1950-1982
1911 [1st Edition] R. C. Griffith and J. H. White 1913 [2nd Edition] Griffith and White 1916 [3rd Edition] Griffith and White 1925 [4th Edition] Griffith and White, completely revised by R. C. Griffith, M. E. Goldstein, and P. W. Sergeant 1932 [5th edition] Griffith and White, completely revised by P. W. Sergeant, R. C. Griffith, and M. E. Goldstein 1939 [6th edition] Griffith and J. H. White, completely revised by Reuben Fine, R. C. Griffith, and P. W. Sergeant [this one is interesting] 1946 [7th Edition] R. C. Griffith and J. H. White, completely revised by Walter Korn under the editorship of R. C. Griffith and P. W. Sergeant 1952 [8th Edition] edited and completely revised by Walter Korn 1957 [9th Edition] completely revised by Walter Korn and John W. Collins 1965 [10th Edition] completely revised by Larry Evans under the editorship of Walter Korn [this one is interesting]
"... the most important single book in world chess literature" – American Chess Correspondent, writing about the tenth edition.
1972 [11th ed] Walter Korn 1982 [12th ed] Walter Korn [his last one] 1990 [13th ed] Walter Korn, revised by Nick de Firmian 1999 [14th ed] completely revised by Nick de Firmian [considered decent] 2008 [15th ed] completely revised by Nick de Firmian