Official NHA Assessment

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

Back to Race
Line Horse
Petit Verdot
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
4 / 9
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Mvulazana            3    55.0    1    0.00     5.0   81    68           81    +0
2    Petit Verdot         2    53.0    2    1.50     0.0   77    77           77    +0
3    Morgan La Fay        2    59.0    3    2.20     0.0   89    89           89    +0
4    Acacia's Blossom     2    60.0    4    3.60     0.0   91    89           89    -2
5    Foreshore            2    58.0    5    7.00     0.0   97    84           87    -10
99   Ice Sunsation        6    58.0    99   0.00     0.0   -     84           84    +0
99   Kailene              3    58.5    99   0.00     5.0   -     75           75    +0
99   Twinklelittlestar    2    53.5    99   0.00     0.0   -     75           75    +0
99   Lucky Miss           3    59.5    99   0.00     5.0   -     77           77    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Mvulazana 81 82 81 +1 5.0 -
2 Petit Verdot Line 77 75 77 -2 0.0
3 Morgan La Fay 89 98 89 +9 0.0 -
4 Acacia's Blossom 91 66 89 -23 0.0 -
5 Foreshore 97 92 87 +5 0.0 -
99 Ice Sunsation - 90 84 +6 0.0 -
99 Kailene - 79 75 +4 5.0 -
99 Twinklelittlestar - 66 75 -9 0.0 -
99 Lucky Miss - 82 77 +5 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