Official NHA Assessment

Race 7: GREYVILLE CONVENTION CENTRE FM 86 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Indigo Fields
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
4 / 10
Within 2 points
Significant Diffs
4 / 10
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    Lady Catherine       4    59.0    1    0.00     2.5   84    85           84    +0
2    Aunty Lizzy          3    57.0    2    1.80     2.0   90    82           82    -8
3    Indigo Fields        3    55.5    3    2.90     2.0   79    79           79    +0
4    Her Royal Majesty    5    48.0    4    4.10     0.0   69    68           68    -1
5    Captain Ariano       4    56.5    5    4.30     2.5   79    80           80    +1
6    Ride The Lightning   3    55.0    6    4.55     2.0   78    78           78    +0
7    Star Act             4    57.5    7    6.55     2.5   81    82           82    +1
8    Ancient Epic         3    57.0    8    8.05     2.0   82    82           82    +0
9    Varvacious           4    60.0    9    10.85    2.5   86    87           87    +1
10   Voice Notes          4    53.0    10   13.25    2.5   72    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 Lady Catherine 84 88 84 +4 2.5 -
2 Aunty Lizzy 90 84 82 +2 2.0 -
3 Indigo Fields Line 79 77 79 -2 2.0
4 Her Royal Majesty 69 64 68 -4 0.0 -
5 Captain Ariano 79 63 80 -17 2.5 -
6 Ride The Lightning 78 61 78 -17 2.0 -
7 Star Act 81 81 82 -1 2.5 -
8 Ancient Epic 82 88 82 +6 2.0 -
9 Varvacious 86 85 87 -2 2.5 -
10 Voice Notes 72 64 73 -9 2.5 -
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