Official NHA Assessment

Race 1: 4RACING WELCOMES YOU MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Trail Runner
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
3 / 9
Within 2 points
Significant Diffs
5 / 9
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    Trail Runner         3    60.0    1    0.00     4.5   71    71           71    +0
2    Traditional Belief   3    56.0    2    1.80     4.5   -     63           63    +63
3    Gimmesumluv          3    60.0    3    2.40     4.5   -     71           71    +71
4    Onceinabluemoon      2    60.0    4    3.80     3.0   70    74           74    +4
5    Mrs Stormiatrix      2    60.0    5    4.05     3.0   75    74           74    -1
6    Emerald Countess     2    60.0    6    4.65     3.0   72    74           74    +2
7    Savara's Princess    2    60.0    7    11.65    3.0   72    74           74    +2
8    Jilted               2    60.0    8    19.95    3.0   65    74           74    +9
9    Good Company         3    60.0    9    22.45    4.5   -     71           71    +71
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Trail Runner Line 71 75 71 +4 4.5
2 Traditional Belief - 77 63 +14 4.5 -
3 Gimmesumluv - 69 71 -2 4.5 -
4 Onceinabluemoon 70 75 74 +1 3.0 -
5 Mrs Stormiatrix 75 81 74 +7 3.0 -
6 Emerald Countess 72 72 74 -2 3.0 -
7 Savara's Princess 72 67 74 -7 3.0 -
8 Jilted 65 65 74 -9 3.0 -
9 Good Company - - 71 -71 4.5 -
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