Official NHA Assessment

Race 3: BET WITH TOTE OPEN MAIDEN (F & M) (For all Maiden Fillies & Mares.)

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Line Horse
Queen Fenn
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
4 / 8
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    Queen Fenn           3    60.5    1    0.00     7.5   65    65           65    +0
2    Spirit Of Shimla     3    59.5    2    0.50     7.5   -     63           63    +63
3    Champagne Problems   2    61.5    3    1.40     5.0   67    72           72    +5
4    Levitator            5    55.0    4    4.60     0.0   62    69           69    +7
5    Penan Nom            2    56.0    5    6.40     5.0   66    61           61    -5
6    Amphitrite           3    59.5    6    6.45     7.5   -     63           63    +63
7    Olive Grove          2    61.0    7    8.95     5.0   76    71           71    -5
8    Li Li Li             3    59.5    8    23.95    7.5   -     63           63    +63
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Queen Fenn Line 65 67 65 +2 7.5
2 Spirit Of Shimla - 81 63 +18 7.5 -
3 Champagne Problems 67 68 72 -4 5.0 -
4 Levitator 62 60 69 -9 0.0 -
5 Penan Nom 66 68 61 +7 5.0 -
6 Amphitrite - 62 63 -1 7.5 -
7 Olive Grove 76 68 71 -3 5.0 -
8 Li Li Li - - 63 -63 7.5 -
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