Winning five in a row is plenty hard enough as it is, and by switching to Happy Valley with the airborne All Is Good, Zac Purton believes Francis Lui Kin-wai has complicated the task even further.

After four consecutive victories over Sha Tin’s 1,400m, All Is Good will return to the city circuit for Wednesday night’s Class Three Kam Shan Handicap (1,650m).

“It’s an interesting one because he’s not the most straightforward horse. He can be a little bit relaxed, and you’ve sort of got to ask him to do everything,” Purton said.

“He’s a bit one-paced. He’s not push-button, so going back to the Valley certainly is going to be a bit of a test for him.”

It has been a remarkable streak for All Is Good, with Lui’s five-year-old enduring 14 consecutive losses to begin his career before hitting his straps.

The gelding’s first win came off a mark of 46, and after saluting in his first Class Three outing in his one run this season back on September 10, he finds himself rated 72 and with a Wednesday-night impost of 127 pounds.

While All Is Good does boast a couple of Happy Valley placings, his only run at Wednesday night’s course and distance resulted in a disappointing 10th.

“He’s got an extra corner to deal with, so it’ll be interesting. But the horse has obviously been going really well the past six months,” Purton said.

“How much further he can go, we’ll find out, but he seems like he’s in decent enough form, and there’s no reason he’s not going to run well.

“He just keeps galloping. He doesn’t do anything flash. He just puts himself in a position and then just keeps his gallop up so that he’s thereabouts. But Happy Valley could pose a bit of a problem for him.”

Purton is likely to look to find some cover forward of midfield from gate eight aboard All Is Good in a wide-open contest.

The son of Press Statement represents just one of a host of chances for clear premiership leader Purton to build on his 31 victories this campaign.

Durham Star chases back-to-back wins in the Class Four American Club Challenge Cup (1,650m), while Colourful Emperor will look to build on a narrow last-start second by breaking through for his maiden Hong Kong success in the Class Three High Island Handicap (1,200m).

Purton picks up the Colourful Emperor ride in the absence of suspended apprentice Angus Chung Yik-lai, while he jumps aboard a pair of John Size-trained second starters whom Luke Currie piloted on their debuts.

Club Soda makes the shift to Happy Valley for the Class Four Tai Tam Handicap (1,650m) after finishing 11th over Sha Tin’s 1,400m early this month, while Golden Rise sticks to the city circuit’s six-furlong trip for the Class Four Plover Cove Handicap after catching the eye with his first-up fourth behind Wood On Fire.