G.D. boekhoff drew up four rules of the competition: ① According to Putnam's last wish, each school should send a team to win glory for its own school with its collective achievements. The team consists of three people, and individual players can also be sent to participate, which is especially suitable for some small schools that cannot send three high-level students to form a team. ② It is managed by the American Mathematical Society, which is the professional organization of mathematics teachers in American universities. It is not only justified, but also convenient to mobilize and organize schools to participate in the competition. (3) Give bonuses and honorary awards to the winning teams and individuals. (4) Provide the first place for individuals to study Putnam research degree and scholarship at Harvard University. In fact, G.D. boekhoff put this activity into the track of "public assistance". Thanks to the appearance of this master, the competition was successful. The first Putnam Mathematics Competition was held in Harvard University on April 6th, 1938. In order to avoid suspicion, the school did not send a team to participate. Among the 163 contestants from 67 schools, the team from the University of Toronto won the first place, so the second game was organized by the University of Toronto, and the school did not send a team to participate. The University of Toronto and Brooklyn College took turns to win the top five from 1943 to 1945. Three games were suspended due to World War II, and the sixth game resumed from 1946. At this time, B. boekhoff, the son of G.D. boekhoff, was in charge of this matter, and the organization of the competition became more and more perfect. It has been held for 66 times so far, and hundreds of colleges and universities participate every year. This activity has brought up a large number of mathematical talents. "Just like the Etworth Competition in Hungary, many of the winners of Putnam Competition in earlier years have become the most creative mathematicians today" (Bush), and many of them have become famous, and three of them have won the Fields Prize. So some people say that boekhoff and his son are close friends of Putnam's family, which is the luck of American junior college mathematics.