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Chelmsford (AW) draw bias

Yes, in places. Across 865 races from 2023-06-01 to 2026-06-09: over 5-6f — strong: low (inside) favoured (iv 1.24); over 7-8f — moderate: low (inside) favoured (iv 1.11); over 9-12f — strong: low (inside) favoured (iv 1.28). Check the A/E column before betting it: a bias the market already prices in is not an edge.

2023-06-012026-06-09 results · 865 races · updated 9 June 2026

5-6f · 282 races

Strong: low (inside) favoured (IV 1.24)
5-6f · 282 races · field avg win 10.4%
Strong: low (inside) favoured (IV 1.24)
DrawWin %Top-3 %IVA/EPRBRuns
Low (inside)
13%
128 wins
20.3%
1.24
vs course avg
1.14
vs market
68.8%985
Middle
10.4%
84 wins
14.9%
1.00
vs course avg
0.94
vs market
60%807
High (outside)
7.7%
69 wins
13.9%
0.73
vs course avg
0.84
vs market
61%900

7-8f · 348 races

Moderate: low (inside) favoured (IV 1.11)
7-8f · 348 races · field avg win 9.8%
Moderate: low (inside) favoured (IV 1.11)
DrawWin %Top-3 %IVA/EPRBRuns
Low (inside)
10.9%
141 wins
17.2%
1.11
vs course avg
0.94
vs market
64.7%1296
Middle
10.9%
116 wins
16.8%
1.11
vs course avg
1.14
vs market
65.7%1063
High (outside)
7.7%
90 wins
12.9%
0.78
vs course avg
0.94
vs market
58%1167

9-12f · 164 races

Strong: low (inside) favoured (IV 1.28)
9-12f · 164 races · field avg win 10.1%
Strong: low (inside) favoured (IV 1.28)
DrawWin %Top-3 %IVA/EPRBRuns
Low (inside)
12.9%
77 wins
18.7%
1.28
vs course avg
1.38
vs market
68.6%595
Middle
9.4%
46 wins
15.1%
0.93
vs course avg
0.80
vs market
63.6%491
High (outside)
7.6%
41 wins
13.2%
0.75
vs course avg
0.71
vs market
59.2%538

13f+ · 71 races

No meaningful draw bias
13f+ · 71 races · field avg win 11.3%
No meaningful draw bias
DrawWin %Top-3 %IVA/EPRBRuns
Low (inside)
12.2%
29 wins
20.3%
1.08
vs course avg
0.68
vs market
68.7%237
Middle
10.3%
19 wins
15.1%
0.91
vs course avg
1.35
vs market
62.7%185
High (outside)
11.1%
23 wins
16.9%
0.98
vs course avg
1.11
vs market
68.9%207

Common questions

Is there a draw bias at Chelmsford (AW)?

Yes, in places. Across 865 races from 2023-06-01 to 2026-06-09: over 5-6f — strong: low (inside) favoured (iv 1.24); over 7-8f — moderate: low (inside) favoured (iv 1.11); over 9-12f — strong: low (inside) favoured (iv 1.28). Check the A/E column before betting it: a bias the market already prices in is not an edge.

Does the market already price in the Chelmsford (AW) draw bias?

Partly. Some favoured bands at Chelmsford (AW) show A/E below 1 (bias over-priced), others do not — the tables below show which is which.

What do IV, A/E and PRB mean?

IV (Impact Value) is the group's win rate versus all runners in the same races — 1.00 is neutral. A/E is actual wins versus what de-overrounded Betfair prices expected — below 1 means the market over-bets that group. PRB is the mean percentage of rivals beaten, a finer-grained placing measure.

Method: stall numbers grouped into field thirds (low/middle/high) per race, so field size never skews the groups; IV against same-course same-band baseline; A/E against de-overrounded Betfair SP. Small samples are flagged rather than hidden. Racing Alpha does not accept bets. 18+ · BeGambleAware.org.