Dunnington swept back to the top of the division one when their twin West Indian pace attack of Hoe Grant and Steve Linton completely wrecked Ripon's batting line-up.
Ripon's veteran Paul Mason had earlier caused problems as he took 4-60 and the Dunnington total of 166-7 owed much to Matt Stacey who made 63.
His only real support came from Paul Miles who made 20.
This total was reciprocated by Ripon's Paul Newcombe, but his team-mates could only add 34 runs as Grant claimed 5-27 and Linton 4-16 to dismiss Ripon for just 54.
In contrast, Sessay's batsmen made hay at Goole and the best partnership of the season resulted.
Sessay lost their first wicket at 6 but this was to be the only success for the Goole bowlers as both John Flintoff and Matthew Till plundered centuries.
The tea-break ended the Goole bowlers' agony but only after the pair had lodged an unbroken partnership of 237.
Till made 116no and Flintoff 117no to record his 16th league century.
Till then took charge with the ball as he grabbed 5-57 in 17 overs to record a rarely produced century and five wickets in the same game.
However, his splendid effort narrowly failed to produce a win as Goole, for whom Neil Webster made 35 and Antony Gibbins 31, managed to salvage a draw at 184-9.
Beverley Town opener Richard Taylor carried his bat through his side's innings to make an unbeaten 103 out of an impressive 243-6 on a good Norwood Park track which helped Richard Todd made 43.
York's batsmen were, however, less comfortable and it was left to Mike Missett to steer them to a draw at 149-6 with an unbeaten 29.
Former divisional leaders Wilberfoss suffered their first defeat of the season when Crayke triumphed by three wickets.
Four Foss batsmen made handy scored without going on to produce a match winning contribution.
Geoff Room 30, Phil Stothard 29, Mike Stothard 27 and Andy Gray 26 all featured, but their side could only reach an inadequate 139 as Mick Hutchinson took 5-79 and Jim Thomas 3-48. Gray again caused problems with 3-45, but Dave Thomas once more gave the Crayke innings a backbone and his 70no proved to be the match winning innings.
Civil Service are 32 points adrift at the foot of the division after having the worst of a draw at Duncombe Park who themselves are someway off the pace after being unlucky to miss out on promotion to the Premier Division last year.
Grant Denny made a promising debut after joining the Helmsley club from Workington as he scored 40 in an opening stand of 70 with Andrew Pierson (33), then Zimbabwean Travis Friend made 49no.
With Peter Kent hitting 58, Park were able to reach a more than useful 234-4.
Service were never capable of reaching this target, but Fraser Clarkson's 43 enabled them to a draw at 162-7.
The game at Stamford Bridge resulted in a perfect tie when the home side closed on 127-9 an identical score to that of Dringhouses.
Ex-Bankfoot player Gerry Fitzpatrick was the leading Dringhouses batsman, making 46 as Stewart Green took 5-51.
Mark Owens then appeared to have set Stamford Bridge on the victory trail with 78, but Fitzpatrick then grabbed three wickets for just six runs in three frenetic overs.
Ex-Riddlesden player Kevin McGuinness claimed 3-18 as the final delivery left the match tied.
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