Official NHA Assessment

Race 3: BETWAY MAIDEN PLATE (F & M) (For Maiden Fillies & Mares)

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Line Horse
Plum Blossom
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
6 / 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    Incredible Indrani   3    60.0    1    0.00     10.0  60    61           61    +1
2    City Lights          4    60.0    2    1.75     7.0   67    70           70    +3
3    Plum Blossom         3    60.0    3    3.25     10.0  63    63           63    +0
4    Shes Everything      3    56.5    4    3.50     10.0  77    55           67    -10
5    Ambitious Lady       3    60.0    5    4.60     10.0  64    61           61    -3
6    Perform              2    60.0    6    8.20     0.0   58    81           81    +23
7    Blue Velvet          2    56.0    7    10.50    0.0   65    73           73    +8
99   Spirit In The Wind   4    60.0    99   0.00     7.0   -     67           67    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Incredible Indrani 60 68 61 +7 10.0 -
2 City Lights 67 52 70 -18 7.0 -
3 Plum Blossom Line 63 53 63 -10 10.0
4 Shes Everything 77 71 67 +4 10.0 -
5 Ambitious Lady 64 62 61 +1 10.0 -
6 Perform 58 54 81 -27 0.0 -
7 Blue Velvet 65 60 73 -13 0.0 -
99 Spirit In The Wind - 60 67 -7 7.0 -
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