Official NHA Assessment

Race 6: RACEHORSE OWNERS ASSOCIATION MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Members)

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Line Horse
Rosslyne
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
7 / 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    Red Maple            3    60.0    1    0.00     6.0   -     60           6     +6
2    Rosslyne             2    60.0    2    3.50     0.0   73    73           73    +0
3    Ponderosa Pine       2    60.0    3    6.50     0.0   66    72           72    +6
4    On The Guest List    2    60.0    4    6.75     0.0   69    72           72    +3
5    Ballycotton          2    60.0    5    12.00    0.0   57    72           72    +15
6    World Heritage       2    57.5    6    14.25    0.0   60    67           67    +7
7    Hayley's Promise     3    60.0    7    16.25    6.0   60    60           60    +0
8    Together Again       5    60.0    8    27.00    0.0   50    72           72    +22
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Red Maple - 107 6 +101 6.0 -
2 Rosslyne Line 73 58 73 -15 0.0
3 Ponderosa Pine 66 63 72 -9 0.0 -
4 On The Guest List 69 57 72 -15 0.0 -
5 Ballycotton 57 53 72 -19 0.0 -
6 World Heritage 60 55 67 -12 0.0 -
7 Hayley's Promise 60 58 60 -2 6.0 -
8 Together Again 50 55 72 -17 0.0 -
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