The book covers the entire year 1870 in the career of the strongest American player G. H. Mackenzie. It brings extensive articles on the tournaments, matches and events Mackenzie has participated, as well as all the 56 today known annotated games he played this year. Indexes of players and openings. Vlastimil Fiala, a well-known chess historian and author, has studied, besides chess books and magazines, about 15 American chess columns at that time (New York Clipper, New York Albion, Philadelphia Evening Bulletin and others) and the book contains a lot of interesting information otherwise difficult to access. George Henry Mackenzie, 1837 North Kessock, Scotland - 1891 New York, was the strongest American player after Morphy. He arrived in the US in 1863; In 1865-1880, he won all 13 US tournaments he participated, including the 2nd, 3rd and 5th US Congresses in Cleveland 1871, Chicago 1874, and New York 1880. Great Chess Players' Series no. 1/2019. 2 pictures.