Official NHA Assessment

Race 3: ALLIED STEELRODE MR 90 HANDICAP (Open)

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Line Horse
Birthright
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
5 / 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    Total Surrender      5    57.0    1    0.00     0.0   84    96           84    +0
2    Royal Edition        4    57.0    2    1.10     4.5   85    91           91    +6
3    Birthright           4    53.0    3    1.30     4.5   82    82           82    +0
4    Mount Darwin         3    57.0    4    1.50     8.0   90    83           83    -7
5    Strewn Sky           2    58.5    5    1.60     0.0   88    102          102   +14
6    Royal Guide          4    58.5    6    21.60    4.5   87    90           90    +3
99   Parisian Walkway     3    55.5    99   0.00     8.0   -     77           77    +0
99   King's Express       3    60.0    99   0.00     8.0   -     86           86    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Total Surrender 84 74 84 -10 0.0 -
2 Royal Edition 85 92 91 +1 4.5 -
3 Birthright Line 82 95 82 +13 4.5
4 Mount Darwin 90 81 83 -2 8.0 -
5 Strewn Sky 88 69 102 -33 0.0 -
6 Royal Guide 87 87 90 -3 4.5 -
99 Parisian Walkway - 113 77 +36 8.0 -
99 King's Express - 102 86 +16 8.0 -
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