Mate in Two Moves

Born Winston Kinney Marks, this US writer of sf short stories also wrote as Win Marks and used the pseudonyms Win Kinney and Ken Winney, each for just one story. He began publishing with "Mad Hatter" for Unknown in May 1940, but then, after "Manic Perverse" (October 1941 Astounding), was not heard of again until 1953 when he published The Water Eater (June 1953 Galaxy; 2010 ebook). He was then quite prolific,