Division 1 leaders Forum A slipped up as they were held to a 5-5 draw by Gladiators A.
Although Karl Bushell was undefeated again, Forum could only field a two-man team, and Gladiators took full advantage to gain some unexpected points.
British Rail saw off Vikings B 8-2 to move just a point behind Forum A.
John Barclay was the star with a maximum that clinched all four points for Rail.
Harry Yeates and Andrew Flint both hit maximums to steer Forum B to a 9-1 win against Bicester A, while St James A made light work of Begbroke A with a 10-0 victory.
In Division 2, Gladiators stretched their lead at the top with a 10-0 win against Forum C.
VIkings C also saw off Forum C 7-3, Markus Wagner bagging a maximum for Vikings.
A Paul Casey maximum allowed Forum C to get back to winning ways by beating Vikings E 6-4.
Forum F consolidated their lead of Division 3 with a 6-4 win over Vikings G, then a 7-3 win over Vikings F.
Chris Smith led the way on both occasions with maximums, and Laurel Christer assisted with an impressive victory over Ricki Whiteaway.
RESULTS
Div 1: Forum B 9 (H Yeates 3, A Flint 1), Bicester A 1; St James A 10 (A Misseldine 3, T Stead 3, M Wilkins 3), Begbroke A 0; Gladiators A 5, Forum A 5 (K Bushell 3); Vikings B 2, British Rail 8 (J Barclay 3).
Div 2: Gladiators B 10 (X Jiu-Huang 3, Y Hsu 3, J Blanchard 3), Forum C 0; Bicester B 9 (P Hargreaves 3, D Badham 3), Haddenham A 1; Vikings E 4, Forum C 6 (P Casey 3); Forum C 3, Vikings C 7 (M Wagner 3); Vikings C 4, Vikings E 6 (D Mottershead 3).
Div 3: Vikings F 3, Forum F 7 (C Smith 3); Bicester C 3, Gladiators C 7 (I Saba 3); Forum F 6 (C Smith 3), Vikings G 4.
Div 4: Forum G 4, Forum H 6 (B Sandison 3); Bicester D 1, Forum K 9 (I Wilson 3, D Simmons 3); Holton 9 (E Shearer 3, B Dobson 3), Forum I 1; Holton 9 (E Shearer 3, B Dobson 3), Forum K 1; Haddenham B 10 (J Witney 3, B Green 3, J Badmin 3), Bicester D 0.
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