Selby's strong batting line-up was again in evidence as the division five leaders sailed past Thirsk's 176-5 to win by six wickets.
Thirsk's batting star was 16-year-old Shaun Holmes, who made his best score in senior cricket with 73no.
Other runs came from Simon Barton (36) and Jim McKendry (30), but their efforts were cancelled out when Mark Bowden (46) and Kevin Lamb (35) responded before Richard Firth settled the outcome with an unbeaten 58.
Second-placed Tadcaster Magnet had little problem in beating Rowntree, who are 104 points below the safety mark. The one plus point for the losers was 14-year-old Jonathon Solly taking 5-24 in only his third game in adult cricket.
Despite the youngster's fine effort and the support given by 12-year-old spinner Matt Horner, Tadcaster were able to reach 153-7 as Richard Cattle made 33 and Ian Dawson 48.
Rowntree then caved in as John Weatherhill's 5-9 in eight overs had the confectionery company side all out for 54 to leave them as the only side without a victory.
Huntington's improvement continued when Steve Beales (7-47) and Wally Baynes (3-50) bowled them to an 83 run win over Dringhouses.
Dick Shaw (79) and Stuart Watson (43) had helped Huntington make 184-9 as they overcame the threat posed by Brendon Walsh's 5-40.
Walsh followed with 32 and Richard Klarik made 30, but the Huntington duo won the day.
New Earswick picked up valuable points in their bid to stave off relegation when they scored a good win over Sessay, who fell 12 runs short of New Earswick's 156-8.
The bulk of these runs were provided by Mick Steels (44) and Craig Stimpson (29). Keith Till took half of the wickets to fall while conceding 39 runs.
When Sessay batted Giles Cressey made 36 and Mike Shuttleworth 28, but Martin Hewitson held all the aces as he claimed 7-47 to dismiss Sessay for 144.
Another game where all 20 wickets fell took place at Stamford Bridge, where the home side beat Hovingham by 37 runs.
Hovingham bowler Mark Hemmingway dominated the first half of the game as he captured 7-69, but Stamford Bridge were able to make 151 all out due to good efforts by Ian Fraser (43) and Martin Veysey (25).
Veysey then hit back in decisive manner by taking 5-24 as, despite a good knock of 64 by Nigel Adams, Hovingham were dismissed for 114.
Updated: 09:50 Monday, July 28, 2003
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