Official NHA Assessment

Race 2: GREYVILLE CONVENTION CENTRE CLASS 5 (F & M) (For Fillies & Mares. Benchmark at 60.0kg = 70)

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Line Horse
Queen Fenn
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
6 / 10
Within 2 points
Significant Diffs
2 / 10
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    Whatastar            2    60.5    1    0.00     1.5   74    73           73    -1
2    Futano               3    51.0    2    1.10     2.5   55    52           52    -3
3    De Gulden            2    56.5    3    1.90     1.5   82    65           72    -10
4    Queen Fenn           3    57.0    4    2.30     2.5   64    64           64    +0
5    Di Rosa              4    52.0    5    2.50     0.0   54    59           59    +5
5    Littleblackgem       3    56.0    5    2.50     2.5   61    62           62    +1
7    Acacia's Blossom     2    54.5    7    2.60     1.5   64    61           61    -3
8    Capricious Miss      3    52.0    8    3.65     2.5   57    54           54    -3
9    Sovereign Gem        3    58.0    9    4.15     2.5   69    66           66    -3
10   Darlingbudsofmay     2    57.0    10   4.95     1.5   67    66           66    -1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Whatastar 74 79 73 +6 1.5 -
2 Futano 55 56 52 +4 2.5 -
3 De Gulden 82 - 72 - 1.5 -
4 Queen Fenn Line 64 64 64 ✓ Match 2.5
5 Di Rosa 54 53 59 -6 0.0 -
5 Littleblackgem 61 61 62 -1 2.5 -
7 Acacia's Blossom 64 63 61 +2 1.5 -
8 Capricious Miss 57 55 54 +1 2.5 -
9 Sovereign Gem 69 67 66 +1 2.5 -
10 Darlingbudsofmay 67 65 66 -1 1.5 -
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