They won the Windsor Park clash by seven wickets, Wian Van Zyl's unbeaten 80 a key factor.
Invited to bat first, F&B were 138-6 in a game reduced to 38 overs per side because of Saturday's rain.
RanaThakur struck six fours on his way to a knock of 38, that coming off 52 balls.
Visitors skipper Mark Smith added an unbeaten 24 further down the order.
Five of the wickets were claimed by Will Moulton.
He posted figures of 5-46 from 11 overs, with three maidens thrown in. Joe Barker took the other wicket.
In reply Chorley chased down their target in 27 overs, putting 142-3 on the board.
Van Zyl opened the batting with Stuart Naden and faced 69 deliveries for his 80.
The South African hit four sixes and eight fours.
Naden hit 22, with Edwin Moulton contributing 16.
Will Moulton joined Van Zyl at the crease, the pair steering the hosts through to victory.
Leyland were beaten by Netherfield at Fox Lane, a game reduced to 37 overs.
Put in to bat, Netherfield were 125-9.
There were three wickets apiece for Ross Bretherton and Andrew Jacques, while Karl Cross collected two.
Leyland fell 26 runs short in reply, dismissed for 99 in 35.4 overs.
Henry Thompson was the top scorer with 36, James Rounding hitting 14.
Harrison Cox did much of the damage for the visitors, reeling in 6-26 off 12.4 overs.
Garstang were winners by 81 runs against Penrith.
Michael Walling set them on their way at Riverside with a mighty 72 off 69 balls.
The opener clubbed 10 fours in his knock before he fell to Ashwin Hebbar.
Batting at six, Matthew Crowther hit 30 '“ including five fours.
Garstang were 181-6 in their 31 overs, rain forcing a reduction.
A strong bowling display from the home side saw them dismiss Penrith for 80.
Fayaz Ughradar claimed four wickets, posting figures of 4-14 from 6.3 overs.
Coen Oosthuysen took 3-8, Danny Gilbert 2-27 and Ian Walling 1-21.
League leaders Blackpool enjoyed a last-ball victory over Morecambe.
Rain reduced the Stanley Park clash to 27 overs.
Morecambe were 98-7, Sam Cooper hitting 20 and Luke Pearson 18.
Jovaun Van Wyngaardt took 5-50, Matthew Grindley collecting 2-45.
Blackpool replied with 99-7, the scores tied going into the last ball '“ Jake Muncaster hitting the winning runs.
Fleetwood's clash with Barrow at Broadwater was abandoned because of rain, while Preston conceded their visit to St Annes.