Official NHA Assessment

Race 7: RIVER INDIGO HANDICAP (For Fillies and Mares. Non-Black Type)

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Line Horse
Perilla
Reference for assessment
Exact Matches
0 / 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    Bevies Delight       5    59.0    1    0.00     0.0   93    89           93    +0
2    Warrior Royale       3    52.5    2    1.10     5.0   90    70           80    -10
3    Perilla              5    59.0    3    1.20     0.0   93    93           93    +0
4    Hierkommiebokkie     5    60.0    4    1.50     0.0   95    94           94    -1
5    Malcolm's Dream      6    57.5    5    1.60     0.0   90    89           89    -1
6    Mascherina           4    60.0    6    2.10     3.0   95    88           88    -7
99   Querari Rose         3    53.5    99   0.00     5.0   -     68           68    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Bevies Delight 93 101 93 +8 0.0 -
2 Warrior Royale 90 101 80 +21 5.0 -
3 Perilla Line 93 89 93 -4 0.0
4 Hierkommiebokkie 95 90 94 -4 0.0 -
5 Malcolm's Dream 90 88 89 -1 0.0 -
6 Mascherina 95 99 88 +11 3.0 -
99 Querari Rose - 89 68 +21 5.0 -
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