Official NHA Assessment

Race 2: PAY YOUR MTC SUBS MERIT RATED 70 HANDICAP (Open)

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Line Horse
Red Top
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
4 / 7
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    Royal Lytham         4    54.0    1    0.00     2.5   58    53           58    +0
2    Red Top              5    60.0    2    5.00     0.0   70    70           70    +0
3    Battle Of Seattle    2    56.0    3    6.25     0.0   62    62           62    +0
4    Copper Fire          3    55.5    4    7.50     4.0   61    53           53    -8
5    Jet Green            4    52.5    5    8.00     2.5   55    50           50    -5
6    Winchester           2    56.5    6    9.50     0.0   72    63           63    -9
99   Zambezi Sunset       2    52.0    99   0.00     0.0   -     54           54    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Royal Lytham 58 69 58 +11 2.5 -
2 Red Top Line 70 70 70 ✓ Match 0.0
3 Battle Of Seattle 62 59 62 -3 0.0 -
4 Copper Fire 61 60 53 +7 4.0 -
5 Jet Green 55 54 50 +4 2.5 -
6 Winchester 72 69 63 +6 0.0 -
99 Zambezi Sunset - 60 54 +6 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