The morning match, against second-placed Cambridgeshire did not go to plan, with Suffolk losing 7 - 8 in a 15-board match. But in the afternoon Suffolk ran out clear winners against Hertfordshire, by 10½ points to 4½.
Suffolk will now be at home to Essex in the National Quarter-Finals, to be played in Ipswich on Saturday 12 May.
Seeing double - the Suffolk team included two Mike Ushers - see the photo below! One (left), Michael E Usher, who most players will know, is from Saxmundham, whilst the other, Michael D Usher, hails from Brandon and does not currently play for any club. He last played competitively at the 2016 Bury St Edmunds Congress.
Today's top scorers for Suffolk were Board 3 Jaden Jermy, who won both games against opponents graded 154 and 146, and Board 15 Cameron Little. Several others scored 1½ points: Alex Sheerin (Board 1), Laurie Pott (4), Mike D Usher (7), Adam John (8), Mike E Usher (11) and Rene Martinez (13).