A famous example of the e4-e5 break leading to a kingside attack occurred in the game Penrose–Tal from the 1960 Leipzig Olympiad. With 19.e5! dxe5 20.f5! Bb7 21.Rad1 Ba8 22.Nce4 White installed a powerful knight on e4, while Black's pieces were hemmed in by the pawn on e5. Penrose soon crashed through on the f-file and scored a stunning upset over the reigning world champion. Other classic examples of this central breakthrough include Ojanen–Keres, Estonia–Finland match, Helsinki 1960