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Sandown draw bias

Yes, in places. Across 240 races from 2023-06-01 to 2026-06-09: over 5-6f — strong: low (inside) favoured (iv 1.18); over 7-8f — moderate: low (inside) favoured (iv 1.10); over 9-12f — strong: high (outside) favoured (iv 1.35). 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 · 240 races · updated 9 June 2026

5-6f · 53 races

Strong: low (inside) favoured (IV 1.18)
5-6f · 53 races · field avg win 11%
Strong: low (inside) favoured (IV 1.18)
DrawWin %Top-3 %IVA/EPRBRuns
Low (inside)
13%
23 wins
21.5%
1.18
vs course avg
1.03
vs market
67.1%177
Middle
7%
10 wins
16.2%
0.64
vs course avg
0.72
vs market
58.5%142
High (outside)
12.3%
20 wins
18.5%
1.12
vs course avg
1.20
vs market
63.3%162

7-8f · 115 races

Moderate: low (inside) favoured (IV 1.10)
7-8f · 115 races · field avg win 10.3%
Moderate: low (inside) favoured (IV 1.10)
DrawWin %Top-3 %IVA/EPRBRuns
Low (inside)
11.4%
47 wins
18.2%
1.10
vs course avg
1.51
vs market
67.5%413
Middle
8.7%
29 wins
15.6%
0.85
vs course avg
0.45
vs market
60.4%333
High (outside)
10.5%
39 wins
18.4%
1.02
vs course avg
0.93
vs market
63.1%370

9-12f · 72 races

Strong: high (outside) favoured (IV 1.35)
9-12f · 72 races · field avg win 10.4%
Strong: high (outside) favoured (IV 1.35)
DrawWin %Top-3 %IVA/EPRBRuns
Low (inside)
9.4%
24 wins
17.7%
0.91
vs course avg
1.04
vs market
63%254
Middle
7.6%
16 wins
15.7%
0.73
vs course avg
0.96
vs market
60.5%210
High (outside)
14%
32 wins
20.2%
1.35
vs course avg
0.98
vs market
66.6%228

Common questions

Is there a draw bias at Sandown?

Yes, in places. Across 240 races from 2023-06-01 to 2026-06-09: over 5-6f — strong: low (inside) favoured (iv 1.18); over 7-8f — moderate: low (inside) favoured (iv 1.10); over 9-12f — strong: high (outside) favoured (iv 1.35). 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 Sandown draw bias?

Not fully. The favoured thirds at Sandown hold A/E at or above 1 in our window — the bias has not been completely priced away, which is where a draw edge can actually pay.

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.