Menorah won the Bet With Williamhill.com On Your Mobile Novices' Chase at Kempton - although he wasn't totally convincing at his fences.
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With Alasi unseating Dominic Elsworth at the eighth, the 4-7 favourite was left with the Alan King-trained Kumbeshwar to beat and he went past his front-running rival with six to jump.
While this was an improved round of fencing, he did get close to a few, notably the second last, but went on to score unextended by three-and-three-quarter lengths.
Sky Bet and Stan James left the winner unchanged at 10-1 for the Arkle at Cheltenham. Boylesports go 12s but William Hill pushed him out to 16s from 14s.
Winning trainer Philip Hobbs said: "He was careful at one or two and jumped a bit left early on but the second-last fence was the only real mistake.
"Overall we are happier but we probably need a bit more practice. One thing that will help in the Arkle is a stronger pace and he did get beaten a couple of times over hurdles when he had to make the running.
"We've plenty of time for another run and he does appreciate better ground and it's bound to start raining soon."