|Timeform's greatest racehorses|
Timeform ratings on the Flat stretch right back to the first Racehorses annual, which came out in 1948, and over jumps to the time of the first jumps Black Books in the early-60s. More recently they have included all the best horses in the world, not just those that have raced in Britain.
Timeform ratings express in terms of pounds the level of form a horse has shown. On the Flat they range from below 30 for bad performers to over 130 for the real top-notchers. Over jumps the range is from below 60 to over 165. Horses without recent rateable form appear as a dash.
Great care is taken to keep the level of Timeform ratings consistent from one season to the next (after due allowance has been made for various factors that might alter the overall picture), so that comparisons between different generations can be made.
The following are Timeform's Greatest Racehorses:
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