Aussie Nick Meadows hit 73 and Owen Dimbylow 72 not out as Challow & Childrey 2nd pulled off an impressive run chase at home to Oxford Downs 2nd.
Earlier, Downs skipper Matty Watts reaped the benefits of his winter diet by hitting 66, and with Noel Pearson (59), took his side to 224-7.
But Challow passed the target with four overs to spare despite Roger Berryman's 4-66.
Challow 30, Oxford Downs 2nd 15.
No fewer than seven Didcot batsmen were dismissed for ducks as they were bowled out for 57 at home to Stokenchurch. Stefan Read took 4-4 from seven overs for the visitors, who needed only 16.5 overs to secure maximum points.
Didcot 1, Stokenchurch 30.
Brackley's Lee Haughton took 6-48 to bowl his side to a 56-run victory at Buckingham Town 2nd. Earlier, Eric Carpenter had hit 56 and Vish Valambhia taken 5-51 in Brackley's 180 all out.
Buckingham Town 2nd, 7 Brackley 30.
Bicester & North Oxford 2nd nearly pulled off an improbable victory at Wolverton Town before falling to a four-wicket defeat.
The visitors had been bowled out for 88, with Hakim Khan taking 5-19.
Town were then reduced to 21-4 in reply before Andy Gosling saw his side to victory with an unbeaten 43.
Wolverton Town 30, Bicester & North Oxford 2nd 9.
Andy Hitchcock claimed 6-34 from 21 overs for Princes Risborough as Bledlow Village were bowled out for 121.
Earlier, Risborough had managed 169 all out, Adam Morton top-scoring with 50.
Bledlow Village 7, Princes Risborough 30.
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