Official NHA Assessment

Race 6: RED DINNER MERIT RATED 80 HANDICAP (Open)

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Line Horse
Abayyaan
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
4 / 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    Sun Bird             3    59.0    1    0.00     1.5   76    72           76    +0
2    Abayyaan             3    60.0    2    1.25     1.5   78    78           78    +0
3    Tradition            4    58.0    3    1.35     0.5   74    75           75    +1
4    Bruce's Spirit       6    57.5    4    4.35     0.0   73    72           72    -1
5    Cutback              6    56.5    5    5.85     0.0   71    70           70    -1
6    Ian's Ferrari        3    54.5    6    7.10     1.5   67    63           63    -4
7    Shesalegend          4    59.5    7    10.10    0.5   77    75           75    -2
8    Differentiate        5    58.0    8    10.33    0.0   74    73           73    -1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Sun Bird 76 87 76 +11 1.5 -
2 Abayyaan Line 78 94 78 +16 1.5
3 Tradition 74 77 75 +2 0.5 -
4 Bruce's Spirit 73 55 72 -17 0.0 -
5 Cutback 71 63 70 -7 0.0 -
6 Ian's Ferrari 67 63 63 ✓ Match 1.5 -
7 Shesalegend 77 74 75 -1 0.5 -
8 Differentiate 74 72 73 -1 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