John Size achieved the quiet milestone on Sunday of becoming the most prolific trainer of 'winners of six in a season', but whether More Bountiful can create history by winning seven remains a tough proposition. More Bountiful became only the 22nd horse to make it six in a season when he won the Chairman's Trophy and the fourth trained by Size, eclipsing George Moore's tally of three in the 1970s (which was flattered by having shared the training of Silver Lining in his 1978-79 season). It's a remarkable record for Size, now in his eighth Hong Kong season, but the trainer was unconvinced about his prospects of breaking the ceiling, saying the mathematics of the Hong Kong system doesn't really allow for seven wins. Being Famous went close four years ago, being touched off by a nose in his final attempt for the term, and Silent Witness would have won seven the same season had his nose been a little longer in the Champions Mile defeat that ended his unbeaten sequence of 17 races. It is partly an issue of ratings and partly an issue of programme. Horses like Success Partners, Darwin and Noble Boy began their winning runs off very low ratings which allowed them to continue to be competitive, even as their handicap marks were hoisted. Success Partners rose 78 points to 118 before he met his Waterloo, while Darwin (40 to 100) and Noble Boy (31 to 87) were found out a little earlier. In 1998-99, Ho Ho won his debut off what was then the starting point for griffins at a mark of 46 and his march was not ended until the following season when, clearly with problems by then, he was well beaten at his only start for the term on a rating of 128. When Silent Witness won six for the second time in 2004-05, ratings were the least of his concerns. He began the season on a 132 rating and remained there, taking on only set-weight races, but he ran out of programme and the only option for the great sprinter was to step up to 1,600m. More Bountiful had certainly been doing himself some favours on the way to Sunday's success, with relatively small winning margins, leading to ratings rises of just seven and eight points that might normally have positioned him well for the record tilt. But handicapper Nigel Gray thumped that one out of the ground on Monday with a 21-point ratings rise that sees More Bountiful on 124 points now and with little in the way of opportunity, even before any consideration of whether he can do the job. For the rest of the season, More Bountiful is only eligible to run on three occasions after the Champions Mile. One is a 1,200m sprint five days later, another the Champions & Chater Cup at 2,400m and the final chance to run will be the Premier Cup over 1,400m on June 13. Realistically, that means only the Champions Mile and Premier Cup are available to More Bountiful to make it seven wins for the season, but, as Size observed after Sunday's win, More Bountiful will give it his best shot.