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When analyzing ratings and their distribution among United States Chess Federation (US Chess or USCF) members, keep in mind that there are fewer girls and women than boys and men. Among recent members (12/31/2020 or later expiration date), 12.4% are coded as female, 85.4% are coded as male, and 2.2% are uncoded (M. Nolan, personal communication, February 23, 2021). From 19722000, that percentage was 5% or lower.

Al Lawrence, Executive Director of USCF from 1988-1996, wrote a memorandum, distributed to the USCF Policy Board and the Womens Chess Committee, about Female Membership in USCF. The memorandum is listed internally at USCF as 100 BINFO #93-397 with a date of October 22, 1993. Theres a hand-written note about some members not being coded for age or gender, affecting the percentages. According to his memorandum, in 1993 girls and women combined were 4.65% of the total USCF membership (3,340 of 71,794 members). Of those 3,340 females, only 612 were women ages 21 or older. In other words, adult women were .0085 of the total USCF membership in 1993.

Another memorandum, 105 BINFO #00-118, summarizes a USCF membership survey conducted in April of 2000. It found that USCF membership was 95% male and 5% female. It breaks down USCF membership as a whole (not by gender) as 8% under age 10, 20% ages 10-20, 42% ages 20-50, and 30% as 50 and older. Given the two BINFOS, from 1993 and from 2000, one can assume that female USCF membership was always 5% or lower from 19722000.

USCF membership numbers, not separated by gender, can be found through 2000 at this link. Data in graphical form through 2020 is at this link, and current membership numbers 2000-2020 are at this link.

The first USCF individual ratings and tournament rating averages appeared in the November 20 and December 5, 1950 issues of Chess Life. Compiled and computed by USCF Rating Statistician Kenneth Harkness, the ratings took into account dozens of tournaments, including six prior U.S. Womens Championships and U.S. Championships.

Three U.S. Womens Champions appeared on the spring 1954 individual list: Gisela Gresser, rated at 2080, Mona May Karff, 2023, and Mary Bain, 1902.

Navigating the Ruy Lopez Vol.1-3

The Ruy Lopez is one of the oldest openings which continues to enjoy high popularity from club level to the absolute world top. In this video series, American super GM Fabiano Caruana, talking to IM Oliver Reeh, presents a complete repertoire for White.

Championship year

Average rating (Harkness/USCF) U.S. Womens Championship

[Number of players in brackets]

Average rating (Harkness/USCF) U.S. Championship (finals) [Number of players in brackets]

1938

1698 [11 players]

2561[17 players]

1940

1798 [9 players]

2511 [17 players]

1941

Mona Karff over Adele Rivero (Belcher) in a match which was not rated.

Sammy Reshevsky over I. A. Horowitz in a match which was not rated.

1942

1665 [9 players]

2421 [16 players]

1944

1572 [9 players]

2248 [18 players]

1946

1726 [10 players]

2369 [19 players]

1948

1703 [8 players]

2239 [20 players]

Modern USCF ratings, by Arpad Elo, debuted in 1961. The Fischer boom began in 1972, when Bobby Fischer won the World Chess Championship. The USCF was founded in 1939 and grew gradually until 1972, when membership doubled due to interest in Bobby Fischers rise to the World Championship (United States Chess Federation, 1996).

For the years 1972 through 1981, the U.S. Womens Championships averages were calculated using the end-of-year (December) rating list or the top-50 list provided for that tournaments year. For example, the 1972 womens average is taken from those 11 players end-of-year (1972) ratings, averaged, except for one player whose only rating appeared on a list earlier that year. For 1978, the average was calculated using a Top-50 Women list which appeared in the January issue rather than the December issue of Chess Life. For tournaments held during 19841991, the ratings were included on the Chess Life crosstable of each womens championship. For 1992 onwards, pre-tournament ratings from each tournaments online crosstable were used to calculate that championships average.

From 19722000, the womens tournaments were 10-, 11-, or 12-player round robins. If the highest-rated players did not accept, alternates were next on the list by rating. Starting in 1948, the winners of the U.S. Womens Open were seeded into the U.S. Womens Chess Championship, or the next highest finisher if the winner already had a spot (N. May Karff Retains, 1948; U.S. Womens Open, 1948). The U.S. Womens Opens were held sporadically, sometimes as round robins alongside the U.S. Open, and the qualifying spot seems to have disappeared in the years after 1948.

The U.S. Championships invited most players by ratings. During the 20th century, all invitees were men. For most years, the U.S. Open Champion, the previous years U.S. Champion, the Grand Prix Champion, and the U.S. Junior Closed Champion received spots in U.S. Championships. The U.S. Junior Open Champion used to get an invitation to the U.S. Championship, though that qualifying spot went away after 1959 U.S. Junior Open winner Robin Aults 011 performance in the 19591960 U.S. Championship. The U.S. Championship was typically a 14-18 player round robin.

The U.S. Championships ratings were calculated using names of the players listed on Graeme Crees website, here. Click on each year for a link to that years crosstable, with participants names. Using those names, ratings were found in the corresponding years Chess Life magazines, available here.

Graeme Cree has posted links to U.S. Womens Championship participants chess ratings on his site; scroll to the bottom of that page, after the list of champions. Cree has also listed rating averages for most U.S. Womens Championships: Click on a championship year to find the players ratings and the average rating of the players.

From 19722000, for both championships, players who were not U.S. citizens had completed one continuous year (12 months) of United States residency, as a USCF member with a U.S. Address, immediately prior to the event in question and also who had refused to represent other countries within the year... Playing for another country at any time requires a candidate for invitations to begin the year...anew (1993 Yearbook, 1994).

The average USCF (Elo) ratings of each U.S. Womens Championship field from 1972-2000 follows.

Master Class Vol.1: Bobby Fischer

No other World Champion was more infamous both inside and outside the chess world than Bobby Fischer. On this DVD, a team of experts shows you the winning techniques and strategies employed by the 11th World Champion.

Grandmaster Dorian Rogozenco delves into Fischers openings, and retraces the development of his repertoire. What variations did Fischer play, and what sources did he use to arm himself against the best Soviet players? Mihail Marin explains Fischers particular style and his special strategic talent in annotated games against Spassky, Taimanov and other greats. Karsten Mller is not just a leading international endgame expert, but also a true Fischer connoisseur.

Championship year

U.S. Women Championships Average USCF (Elo) ratings

[number of players]

U.S. Championships Average USCF (Elo) ratings

[Number of players]

1972

1799 [11 players]

2473 [14 players]

1974

1813 [11 players]

2455 [14 players]

1975

1894 [11 players]

2486 [14 players]

1976

1903 [11 players]

No U.S. Championship

1978

1853 [11 players]

2497 [15 players]

1979

1854 [12 players]

No U.S. Championship

1981

2034 [12 players]

2565 [15 players]

1984

2129 [11 players]

2587 [18 players]

1986

2055 [10 players]

2619 [16 players]

1987

2158 [10 players]

2634 [14 players]

1989

2072 [10 players]

2658 [16 players]

1990

2195 [10 players]

2587 [16 players]

1991

2208 [10 players]

2637 [16 players]

1992

2244 [10 players]

2631 [16 players]

1993

2274 [10 players]

2674 [12 players]

1994

2263 [10 players]

2632 [14 players]

1995

2200 [10 players]

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The ratings gap and gender: Analyzing U.S. Chess Championships (Part I) - Chessbase News