Sessay saw their lead at the top Hunters York and District Senior Cricket League Division One increase despite missing out on victory in a thrilling finish at Bridlington.
Below them it was all change as the three teams directly beneath them at the start of the day were all ousted from their positions, in an increasingly close fought race for the promotion places.
The unbeaten visitors won the toss and chose to bowl first. Just as the players were about to take to the field a heavy rain shower delayed start by 90 minutes and reduced the game to 36 overs per side.
When play did start Brid made a good start with openers Casey Rudd and Simon Leeson putting on 40 in nine overs before Leeson fell for 17.
Bridlington lost another wicket with the score on 52, but Rich Lount joined the in-form Rudd and these two put on 69 for the third wicket before Lount went for 22.
Rudd passed 50 again and went on to make a fine 78 before he was smartly stumped.
Brid were on 133/4 with nine overs to go. Steve Janney and Sam Edmundson played aggressively and added 76 in those final nine overs with Janney finishing on 33 not out and Edmundson on 46 not out as Brid closed on 209/6.
The pick of the Sessay bowlers was Richard Till with 2-40 from nine overs.
Sessay made a positive start to their reply with skipper Mark Wilkie and Matthew Till putting on 92 inside 15 overs before Till was stumped by Harrison Male of the bowling of Janney for an aggressive 53.
Wilkie was bowled by Rudd for 37 and dangerman Mason went the same way for 19.
Sessay were 117/3 at the halfway point of the innings and still looked favourites but Rudd picked up his third wicket and Janney claimed another as Sessay slipped to 134/5.
Brid sensed their chance to bowl the visitors out but a stubborn sixth wicket partnership of 40 between Christopher Till and Liam Carver halted their progress.
Till was bowled by Edmundson for 28 and the returning Will Hall clean bowled Stuart Peirse for four.
Sessay were now 188/7 with five overs to go. Carver and Richard Till tried their best to chase down the target but with the boundary defended, Sessay were only able to pick up ones and two.
It came down to 10 being required from the final over but Sessay could on manage six and Bridlington held their nerve to complete another fine all round team performance and pick up the winning draw and 26 points from the league leaders.
Sessay gained 17 points for a losing draw in what was a fantastic game of cricket.