Zak produces the goods in Waterlooville League
The 14-year-old defeated league-leader Dean Russell, defending champion Samuel Laxton, Jamie Wilson (with a 40-point start) and Thomas Sharp.
Third-placed Truscott is just two points behind Laxton with two weeks left. Russell has a nine-point lead at the top.
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Hide AdOwen Jenkins won the second group and moves to fifth in division one.
Billy Reid heads division two by one point from Antony Terroni.
Division three front-runner Henry Martin won the third group.
In the Monday Junior League, Wilson won the top group and knocked in the highest break of 52.
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Hide AdThe 14-year-old takes a two-point lead into the final five weeks.
Jenkins was undefeated in the second group and is now just two points adrift of fourth-placed Harry Wilson.
Meanwhile, a national junior snooker champion from Gosport is one step closer to a second English title.
Olly Gibbs, the current English Under-14 champion, has progressed to the last-16 of this season’s under-16 event.
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Hide AdThe 14-year-old won his round-robin group at the southern qualifier at Frames Sports Bar, Coulsdon, south London.
He now faces a trip to Leeds next month for the knockout stage.
The previous day, Portsmouth potter Samuel Laxton, 12, won one game and chalked up a 31 break on his debut in the under-14 competition.
Two of the region’s players progressed through the group stages at the fifth leg of the Cuestars South of England Championship Tour.
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Hide AdBut James Budd and Mark Lloyd made last-16 exits at Fareham Snooker Club.
Budd, competing on home tables, beat Lloyd in the group stages and lost 2-0 to Christian Chislett, from Basingstoke.
And Lloyd, who dropped one place to fourth, went out 2-1 to former Welsh international Callum Lloyd.
Havant siblings Callum and Chloe White, along with Elliott Weston, made group stage exits.