original passage: In the 1980s "Mathematical Games" began to appear only irregularly. Other authors began to share the column, and the June 1986 issue saw the final installment under that title. In 1981, on Gardner's retirement from "Scientific American", the column was replaced by Douglas Hofstadter's "Metamagical Themas", a name that is an anagram of "Mathematical Games".
original sentence: In the 1980s "Mathematical Games" began to appear only irregularly.
sentence2: Could an avid reader who tried to solve the puzzles given in the column on their own expect to learn the solution (and to start on a new challenge) with the next column on a predictable timetable?
sentence1: In the 1980s "Mathematical Games" began to appear as a regular feature in every other issue. Other authors began to share the column, and the June 1986 issue saw the final installment under that title. In 1986, on Gardner's retirement from "Scientific American", the column was replaced by Douglas Hofstadter's "Metamagical Themas", a name that is an anagram of "Mathematical Games".