The Swiss amateur who beat Bobby Fischer turns 90: Happy birthday, Dieter Keller!

Today, Dr Dieter Keller of Zurich celebrates his 90th birthday. Heartfelt congratulations to the International Master, who defeated several of the leading players of his time, most notably Bobby Fischer, Efim Geller, Bent Larsen and Oscar Panno. Eduard Frey presents highlights from a remarkable life. | Photo: Dieter Keller at the Zurich International Tournament 1959 | Source: Tournament book, via Europe Échecs