Negative Draw Bias in 2026
Negative draw bias revisited for 2026
Last week I looked at some draw biases over 5 furlongs in 7+ runner handicaps, writes Dave Renham. In this follow up I will examine ‘negative draw bias’, or NDB for short. I discussed NDB four years ago in a piece (here), but this one will take a slightly different slant. Or at least it will be highlighting NDB horses in a slightly different way.
Russell Clarke, who has written several excellent articles on geegeez.co.uk, was the first person I saw discussing NDB back in the 1990s in Odds On magazine. Ever since then it has been something I have kept a close eye out for.
What is negative draw bias?
Negative draw bias highlights a horse or horses that ran well from a poor draw and, hence, in theory have performed much better than their finishing position initially indicated. From there, we would have a horse to keep an eye on, hoping that a good opportunity to bet this horse may come up soon afterwards given more favourable circumstances.
As with many things in racing, negative draw bias is not quite as simple as it sounds. There are problems with the idea – for example, once we have found a horse that has run well from a poor draw, we have the tricky decision of how long to continue supporting the horse in the future? One run? No more than three runs? Until it wins? What if it loses four or five races? There clearly is no ‘correct’ answer to this question.
We also need to think about under what circumstances we back the horse. Should we back it blindly? Or only under similar conditions? What if it is drawn poorly again, and so on .
A third question to consider is, can we be completely sure the horse has actually run well against a draw bias? In my 2022 article, when looking for examples of NDB I focused on individual races that had seemed to show a significant draw bias. These were primarily big field affairs, often on a straight course where one side of the draw seemed to be strongly favoured over the other. There is a case to say that biases that occur like this can be down to a pace bias (i.e. the fast horses were all congregated on one side of the track and therefore made that 'mini race' quicker) rather than a draw bias, but my educated guess is that it is often a combination of the two. How important one is over the other though is anyone’s guess and not something I want to dwell on here.
Approach
For this article I am going to take a different approach to highlighting NDB horses. It is essentially a systematic approach, and the starting point is last week’s draw bias article. System-based ideas are rigid and not for everybody, but the big plus is that we can find system qualifiers without having to do any serious legwork. Because, for this ‘system’, I’ve done the legwork for you.
Last week I highlighted a variety of courses that had shown an apparent draw bias over 5f in handicaps between 2021 to 2025. From this initial group of courses, I wanted to try and establish those with the strongest biases. I did this using two rules. The first rule was that the disadvantaged third of the draw needed to have a win percentage of below 25% coupled with a PRB figure of 0.48 or lower. The second involved a simple calculation of multiplying the win strike rate percentage of the disadvantaged third of the draw by its PRB with only the lowest scoring courses making the cut. I felt this was a fair way to do it and, essentially, I needed to use some sensible parameters to establish what were likely to be the strongest biases.
The courses that qualified were:
Ascot, Ayr, Bath, Chester, Musselburgh, Redcar and Thirsk.
Now I had the courses with the strongest 5f draw biases against my calculation, I planned to use them within my NDB method like this:
I wanted to see how horses that had run well from the poorest section of the draw at these course/distance combinations fared on their next run.
The system I came up with, then, was thus:
- Last run at one of Ascot, Ayr, Bath, Chester, Musselburgh, Redcar or Thirsk
- Last run in a 5f handicap with 8 or more runners
- Finished second or third when drawn in disadvantaged section of the draw.
Not many rules, which I think makes the best kind of system.
I do need to clarify what I mean by disadvantaged section of the draw. Specifically, I wanted to try and find the very worst drawn runners; so instead of including all stall positions within the ‘worst’ third of the draw, I set things up like this:
Essentially, I was trying to concentrate on horses berthed in the lowest quarter of the draw as best as possible. Clearly, because all field sizes are not divisible by four, I could not do that perfectly, so the draw positions in the table clarify which stalls qualify as being in the ‘disadvantaged’ section.
It should also be noted that the draw positions have been adjusted for when there were non-runners. For example, if the horse drawn 3 was a non-runner, then the horse drawn 4 was now effectively drawn 3, draw 5 became 4 and so on.
Baseline Method Qualifiers
Before moving on to the nitty gritty, let me quickly give two last time out (LTO) run scenarios, one where a horse would qualify under this NBD system and one where a horse would not.
- LTO run at Redcar 5f where the field size was 14 runners. The horse drawn 12 finishes in third place. This horse qualifies under the NDB system, as draw 12 counts as a disadvantaged stall.
- LTO run at Thirsk 5f where the field size was 10 runners. The horse drawn 3 finishes second. This horse does not qualify under the NDB system, as draw 3 does not count as disadvantaged stall (with 10 runners only stalls 1 and 2 qualify).
An issue with this system is that we are only going to get a small amount of qualifiers because not many runners finish second or third from a very poor draw. Indeed, over the five years I studied there were only 109 qualifiers across all LTO C&Ds. How they fared is shown in the table below:
So, the good news is that they made a fair profit with a solid strike rate, but the less good news is that the system has averaged out at around 22 qualifiers per year.
Here are the course LTO splits:
As we can see, six of the seven tracks were individually profitable, with Redcar having a shocker! Of course, these individual course sample sizes are extremely small, but it is pleasing to see that it is not just one course or one big priced winner that has been responsible for the profits.
One quick caveat at this juncture: when I researched the original draw bias piece, I used handicap races with 7+ runners. For this NBD system I tweaked it slightly and am using 8+ runners. There was nothing sinister going on like trying to improve upon the results, it was simply to make it easier for me to split the draw in four. I did back check the results for LTO races with 7 runners and the overall results would have actually improved matters! However, I was not going to change to 7+ runners LTO just to get better figures. Back-fitting is not a good option.
Broadening the Search
After this promising start I decided to look for other strong track and trip biases to test the NDB system. The distances I wanted to check next were the other ones along with 5f where the draw bias tends to be strongest – namely 6f, 7f and 1-mile races. Let’s start with the longest trip and work backwards.
1 Mile
Over the 1-mile trip the C&Ds that passed my two earlier rules were Hamilton, Pontefract and York. Their draw third win splits for qualifying 1m handicaps (7+ runners) were as follows:
And the PRBs
All three courses saw high draws really struggle during this recent timeframe and below are the overall stats when combining all NDB system qualifiers that ran over these C&Ds last time out.
It's another smallish sample despite combining three more courses, but also another very profitable one. There was a winner priced BSP 35.44 so after commission that effectively accounted for half of the profits but even taking that out of the equation the figures would have been excellent.
Here are the individual LTO course splits:
All three in profit, albeit again the sample sizes are very small. One course over 1 mile that just failed to pass my two rules was Redcar. For the record, applying the NDB system to this LTO C&D would have yielded five winners from 25 producing a return of 26p in the £.
7 Furlongs
When I switched to look for courses over 7f with a strong bias only one course passed the two NDB system tests: Goodwood. High draws have struggled there with just 16.3% of the top ‘third’ winning (PRB 0.47). Subsequent NDB system qualifiers from here would have amounted to 20 runners with the following results next time out:
Another small profit which keeps things moving along in the desired direction.
6 Furlongs
Finally, I looked at the strongest 6f biases to see which C&Ds qualified for the NDB system. Four passed my rules namely Kempton, Leicester, Yarmouth and York. For all four it was the higher draws that performed poorly. Here are their top third win percentages and PRBs:
It’s amazing that three of the four had exactly the same win percentages. The chances of that happening was extremely unlikely shall we say!
Combining these four LTO C&Ds together, NDB qualifiers would have produced the following results:
It is yet another group of courses combining to make a profit, and a bigger sample here due mainly to Kempton’s LTO qualifiers accounting for more than half of the total. (The advantage of a lot of races over a specific C&D). Here are the individual LTO course splits:
Three of the four would have been profitable, with Yarmouth just missing out.
There were a couple of other courses over 6f that were close to qualifying across my two rules, namely Chelmsford and Pontefract. As it turns out both would have proved extremely profitable if I was able to apply the NDB system rules to their potential qualifiers. Unfortunately, though they cannot be added to the overall totals. As I said earlier NO BACK-FITTING! In any case, Chelmsford has now unfortunately been mothballed, at least for the foreseeable future.
Combined Total
Ok, it is time to share the combined totals for all LTO C&Ds qualifiers (5f-1m).
That's not too shabby, if I do say so myself!
For anyone interested in following this NDB system this year, below is a list of all of the qualifying LTO courses used in the article. I have essentially replicated the earlier ‘number of runners’ table but added all the C&Ds (6f to 1 mile) to the relevant columns:
This research has seen a good deal of legwork from yours truly, and it was also extremely hard to put together coherently in an article, but it is hopefully an interesting piece. As can be seen, there's a lot of milage in negative draw bias angles - so keep your eyes peeled!
- DR

















































































































































































