The Porcupine Warriors won the tight game through Ben Acheampong's first half goal to stay three points clear of close rivals Accra Hearts of Oak.
The Phobians themselves chalked a hard fought away victory in Kpandu against Heart of Lions.
The game was significant for the return of former Black Stars midfielder Laryea Kingston and he worked his socks off for 90 minutes.
Kingston also played a key role in setting up the goal for Mahatma Otoo.
Wassaman United earned a 1-0 victory at Bechem United but the game was marred when the match referee Jonathan Tetteh was taken to hospital after he was hit by an object at half time.
Elsewhere Ebusua Dwarfs beat Tens Youth 3-0 to stay in touch with the leading pack while Mighty Jets held Berekum Arsenals to a goalless draw.