Elliot Watt's second-half winner kept St Johnstone's Scottish Premiership survival hopes alive and cranked up the heat on freefalling Ross County . Simo Valakari's Saints, nine points adrift at the foot of the table in January, moved within three points of the second-bottom Staggies, with a marginally better goal difference, after defeating them 2-1 in a tense showdown at McDiarmid Park. Kilmarnock ensured Premiership status for another season with an eventful 3-2 win over Dundee at Rugby Park.