Eve Muirhead guided Team GB through a phalanx of permutations and into the Olympic semi-finals, dramatically guaranteeing a shot at a medal.
Britain needed to beat the Russian Olympic Committee to give themselves a chance and hope Switzerland beat Japan and Sweden beat South Korea.
They downed Russia 9-4 and watched on nervously as the Swiss prevailed 9-4 and then Sweden held off South Korea's 'Garlic Girls' 8-4.