Ross County have a four-point lead in the SPFL Development League with three games to play after a 1-0 win over Aberdeen on Monday.
Dylan Dykes scored the only goal from the penalty spot as Stuart Kettlewell's men claimed a crucial victory at Peterhead’s Balmoor Stadium.
Hibernian are up to second spot following a 2-1 victory against reigning champions Celtic at Oriam on Tuesday and Hamilton Accies are third after a 2-2 draw with St Johnstone.
Rangers beat Hearts 2-1 at Forthbank and Motherwell saw off St Mirren 4-0. Partick Thistle were 3-1 winners away to Inverness CT and Falkirk defeated Dundee 3-0.