Official NHA Assessment

Race 2: ALL TO COME MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Grace Lightning
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
4 / 12
Within 2 points
Significant Diffs
7 / 12
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    Our World            4    60.0    1    0.00     2.5   64    66           66    +2
2    Grace Lightning      3    59.0    2    0.75     4.0   65    65           65    +0
3    Silver Slippers      3    59.0    3    1.25     4.0   64    65           65    +1
4    Make It Happen       4    60.0    4    1.75     2.5   54    69           69    +15
5    Meadow Beauty        3    59.0    5    3.25     4.0   55    63           63    +8
6    Temple Bar           3    59.0    6    3.50     4.0   64    62           62    -2
7    A Foreign Affair     3    59.0    7    4.75     4.0   -     61           61    +61
8    Winter Princess      3    59.0    8    40.25    4.0   -     61           61    +61
9    Jungle Promise       3    59.0    9    99.99    4.0   64    61           61    -3
99   Mystery Trip         5    60.0    99   0.00     0.0   -     71           71    +0
99   Lady Isabella        4    60.0    99   0.00     2.5   -     66           66    +0
99   La Sicaria           4    56.0    99   0.00     2.5   -     58           58    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Our World 64 64 66 -2 2.5 -
2 Grace Lightning Line 65 60 65 -5 4.0
3 Silver Slippers 64 63 65 -2 4.0 -
4 Make It Happen 54 54 69 -15 2.5 -
5 Meadow Beauty 55 53 63 -10 4.0 -
6 Temple Bar 64 60 62 -2 4.0 -
7 A Foreign Affair - 49 61 -12 4.0 -
8 Winter Princess - 20 61 -41 4.0 -
9 Jungle Promise 64 60 61 -1 4.0 -
99 Mystery Trip - 44 71 -27 0.0 -
99 Lady Isabella - 53 66 -13 2.5 -
99 La Sicaria - 46 58 -12 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