The grey ended a frustrating run of four second places to score a tidy victory off bottom weight in the bet365 Handicap Chase.
Splash Of Ginge made the early running, but at the business end the Listed heat turned into a duel between Guitar Pete (7-1) and Sametegal, who was returning after a long absence.
The former's race-fitness proved decisive as he pulled seven lengths clear on the run to the line under Day, who claims 3lb.
Richards said: "He's been running very consistently all summer, so he deserved that.
"We'll keep him going. He lives in the paddock a bit, so as long as I can get him out in the field and the weather stays decent we'll do that."
On A Promise (7-2) initiated the brace when getting on top on the run-in to foil the 9-4 favourite Alfie's Choice by three and a half lengths in the Watch Racing UK On BT TV Conditional Jockeys' Novices' Handicap Hurdle.
"That was grand. He's a big, weak horse. He had a good summer and he's strengthened up well," said the Greystoke handler.
"I'll take my time. He's a chaser for the future - I won't be in a great rush with him."
Some Invitation (8-11 favourite) was able to coast home in the three-runner Get Daily Tips At racinguk.com Novices' Chase after Very First Time came down two out when there was little between the pair.
The Dan Skelton-trained six-year-old put in a good round of jumping on his fencing debut for Harry Skelton and finished a long way clear of Work Du Breteau.
The latter's rider Harrison Beswick was banned for eight days for continuing in the race, contrary to the horse's welfare. He told the stewards that the horse had a breathing problem from the fifth-last fence, an issue the vet confirmed.
Malaya (10-11 favourite) had little difficulty landing the odds in the Arkle Finance Wensleydale Juvenile Hurdle.
Sam Twiston-Davies enjoyed a nice lead from the start and the Paul Nicholls-trained filly kept on strongly to keep City Dreamer at bay by four lengths.
Brian Hughes made all on James Ewart's Aristo Du Plessis (3-1 joint-favourite), who kept up the gallop to see off Cornborough by five lengths in the bet365 Handicap Hurdle.
Carlos Du Fruitier (8-11 favourite) got the better of Jammin Masters to take the Racing UK HD On Sky 432 Novices' Hurdle by three-quarters of a length for trainer Ben Pauling.