With seven rounds of Premier Division matches still to play, just eight points separate the teams placed first to fourth.
Menai Bridge rattled up a big score which secured them a thumping victory at Parc Villa.
Winning the toss and electing to bat, the Anglesey side posted 269-9 off 50 overs, Jack Gower (82) and Gethin Roberts (69) their leading run-makers.
Sushant Thapa returned the best figures for a toiling Pesda attack of 2-53.
In reply, the Ogwen Valley outfit were bowled out for just 81, skipper Ashley Wood bagging a remarkable 3-4 off seven overs, Patrick Glover collecting 3-34 and Gerallt Roberts 2-1.
A thriller at Brymbo SSC saw visitors Denbigh finish just five runs short of what would have been a stunning victory.
The home side amassed a huge 271-4 off 50 overs, James Claybrook leading the charge with 63 not out, Chris Taylor adding 56, Johanes Barnard 54 and Sam Aplin 50.
Taylor and Aplin formed an opening stand of 101, Ranija Abeysinghe gathering 2-42 for the away side.
In reply, Denbigh finished on 267-7, Ieuan Jones blasting 65 not out, captain Harrison Jones 63 and fellow opener Gerallt Lyall 60, the latter pair putting on 121.
For the hosts, Richard Deniz picked up 3-51, Aplin 2-35 and Taylor 2-47.
Nathanael Scott scored his first ton for Bangor but the 23rd of his career and seventh in North Wales cricket as the Citizens maintained the Premier leadership with a thrashing of Conwy.
Opener Scott, who joined the Ty Newydd club this summer after seven years at St Asaph, made 110 out of a massive away total of 281-9 off 46 overs.
Liam McCann (38), Franco Kasner (37) and Nadeem Rehman (37) provided good support to Scott, who was fourth out and is now on 729 league runs for the campaign.
Conwy’s Lalmon TV scooped 4-30 and Shaun Davies 2-41.
The hosts were dismissed for 127 in response, Lalmon TV 33 and Latham Tawhai 40 not out, Smit Parekh snaring a superb team best 6-29 and Jamie Grimshaw notching 2-29.
Amidst all the big Premier Division totals on Saturday was a low-scoring encounter at Mochdre, where the champions eked out a three-wicket triumph.
Gwersyllt Park were put into bat and dismissed for just 91, Adam Campion 3-7, Owen Davies 2-11 and Marcus Mangiameli 2-16 for the hosts, who then got home on 95-7, Iroshan De Silva 4-13 off eight for the visitors,
Jordan Evans (83 not out) and Elliot Colclough (61) produced the crucial knocks as Northop celebrated a five-wicket win at Flint Road.
Saints called the coin correctly, elected to bat, and reached 195-9, skipper William Ryan 43 and Will Norman 32, Matthew Mullarkey 4-52, Andrew Oates 2-32 and Andy Poynton 2-34 for the hosts, who reached 199-5 in 39 overs, Evans and Colclough putting on 107 for the third wicket.
Matty Ryan snapped up 3-12 for Saints.
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