Official NHA Assessment

Race 3: EPSOM RACECOURSE OPEN MAIDEN (For all Maidens)

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Line Horse
Good Omen
Reference for assessment
Exact Matches
1 / 12
Calculated = Official
Close Matches
5 / 12
Within 2 points
Significant Diffs
5 / 12
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Penan Nom            2    48.0    1    0.00     3.5   62    58           58    -4
2    Good Omen            2    57.0    2    1.30     3.5   76    76           76    +0
3    Etzebeth             3    60.5    3    1.90     5.0   -     80           80    +80
4    Light The Fire       2    56.0    4    2.20     3.5   71    74           74    +3
5    Winding Power        2    54.5    5    2.45     3.5   73    71           71    -2
6    Sargasso Sea         3    52.5    6    3.35     5.0   69    64           64    -5
7    Sail The Horizon     3    60.5    7    6.45     5.0   -     80           80    +80
8    William Of Orange    2    56.0    8    8.75     3.5   71    74           74    +3
9    Play World           3    60.5    9    11.85    5.0   -     80           80    +80
10   Levitator            5    50.5    10   12.15    0.0   61    70           70    +9
11   Full Monty           3    60.5    11   13.35    5.0   -     80           80    +80
12   Camogie              3    60.5    12   18.45    5.0   -     80           80    +80
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Penan Nom 62 68 58 +10 3.5 -
2 Good Omen Line 76 74 76 -2 3.5
3 Etzebeth - 75 80 -5 5.0 -
4 Light The Fire 71 74 74 ✓ Match 3.5 -
5 Winding Power 73 72 71 +1 3.5 -
6 Sargasso Sea 69 66 64 +2 5.0 -
7 Sail The Horizon - 75 80 -5 5.0 -
8 William Of Orange 71 63 74 -11 3.5 -
9 Play World - - 80 -80 5.0 -
10 Levitator 61 60 70 -10 0.0 -
11 Full Monty - 70 80 -10 5.0 -
12 Camogie - 78 80 -2 5.0 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. Apply special rules (maiden caps, layoff allowance)
Key Formulas:
  • Drag Effect: Varies by distance (see Benchmarks page)
  • 1 length ≈ 1kg at 1 mile (1600m)
  • WFA Scale: Based on Admiral Rous's 1855 table
  • Rating Points: 1kg = 2 rating points