Wallsend, Merewether, Wests and Belmont will play virtual semis this weekend as part of a four-way battle to make the Tom Locker Cup final later this month.
Just a single point separates the pool B frontrunners - Wallsend, Merewether, Wests (15), Belmont (14) - with one 40-over fixture remaining before the November 24 decider.
Wallsend, who lead the way based on quotient, host Merewether and Wests are at home to Belmont with winners keeping their Newcastle District Cricket Association one-day title hopes alive.
The logjam of teams follows results from Saturday's fourth round encounters.
Belmont (4-153) beat Wallsend (9-152) at Cahill Oval with captain Marcus Hainsworth making an unbeaten 90.
Merewether (9-157) defeated Newcastle City (107) at Townson Oval while Wests (246) easily accounted for winless Toronto (160) at Ron Hill Oval.
In pool A, Hamilton-Wickham (5-172) have all-but ensured they will have a shot at defending the silverware after chasing down Stockton (7-171) at Passmore Oval.
Charlestown (153), six points behind Hamwicks, restricted hosts University (126) with Jacob Richardson (5-29) the stand out.
Sudhanshu Gundeti's 99 was the difference for Cardiff-Boolaroo (7-208) against Waratah-Mayfield (181) at Pasterfield Sports Complex.
POOL A: Hamwicks 21; Charlestown 15; Stockton, University 10; Cardiff 9; Waratah 3.
POOL B: Wallsend, Merewether, Wests 15; Belmont 14; City 11; Toronto 5.