In the end, Penguin won 12-8, but Exeter will recall to their frustration a key spell earlier in the game when a goal by Reuben Powell cut Penguin's lead to 5-4 - only for Exeter to fail to score immediately afterwards with two Penguin players excluded. Then they were awarded a penalty - which was blasted over the Penguin crossbar.
Despite the excellence of Exeter goalkeeper Toby Hogg, Penguin soon powered into an 8-5 lead after three periods and then 11-6, before a belated response from the Devon side.
Watford beat City of Bristol 13-12, recovering from 12-10 down in the final period to win with goals by Josh Brown (2) and Matt Williams.
Championship 1 continued to produce a run of tight finishes as Portobello beat Sheffield 11-10 at East Manchester thanks to a man-up goal from Luca Pollock 1.12 from the end. Caledonia defeated Lancaster 17-9.
Sedgefield hammered Croydon 21-11 to complete a hat-trick of wins in Championship 2, putting them clear at the top of the table. Ben Alderson scored six.
Photo (Trevor Hyde): Penguin's Tilemachos Pissas shoots for Penguin against Exeter, with James Coleman in defence.