Haywards Heath are targeting their own version of the Grand Slam after beating Winchester in the fog.
Heath scored three fine tries to win 19-3 in a London One tussle at Whitemans Green and maintain their midtable position.
Now they want to beat every team in the division at least once before the end of the season.
That means going to Sutton and Epsom next Saturday and toppling the only side to have beaten them at Whitemans Green in the last three years.
High-flying Havant, Basingstoke and Norwich have also still to visit Sussex.
Saturday's contest was brought forward by 15 minutes because of the threat of fading light, then put back again as mist descended.
At one stage the referee feared he would have to call the game off as he could not see from one set of posts to the other.
Heath skipper Henry Goodburn said: "It was one of the strangest build-ups to a game I can remember. Both teams wanted to play but at 2pm it would have been impossible.
"Fortunately the mist started to clear."
Heath took charge with a superb early try, finished off by fullback Stuart Charnely up in the line after a miss-move had been worked in midfield.
Charnely also started the 80-yard move which included Henry and Giles Goodburn, Tom Hills, Mark Pymm and Dave Atkin before Damien Lyall got over at the posts.
Glenn Rankin was sin-binned approaching half-time as the referee's response to persistent infringing by the hosts.
Winchester kicked a penalty to reduce arrears to 12-3 but the hosts clinched victory when Alex Meredith struck from close range and Charnely added his second conversion of the match.
Dave Wattam was the unluckiest man in red and black. He came on 12 minutes from time and, three minutes later, was yellow-carded, ending his participation in the match.
Goodburn said: "Dave was unlucky. The card was for persistent infringing by us as a team but he had only been on for a few minutes.
"It was a good result and it means we have won six and lost six now, but we gave away too many penalties and did not defend them very well."
Heath's second team gave their title hopes a huge boost with a 41-6 defeat of rivals Worthing II in the Sussex Merit Table. Tom Izod scored two tries.
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