Official NHA Assessment

Race 1: 4RACING WELCOMES YOU WORK RIDERS MAIDEN PLATE (For all Maidens)

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Line Horse
Gift Of Royal
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
7 / 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    Gift Of Royal        3    60.0    1    0.00     5.0   62    62           62    +0
2    Underdog             3    60.0    2    0.80     5.0   52    66           66    +14
3    Indian Spice         3    59.0    3    2.00     5.0   70    63           63    -7
4    Samuel Sharpe        3    59.0    4    2.20     5.0   -     63           63    +63
5    Afterburn            3    60.0    5    3.40     5.0   65    63           63    -2
6    Rock My Boat         3    59.0    6    3.90     5.0   55    61           61    +6
7    Jabberwocky          4    60.0    7    6.40     2.5   61    67           67    +6
8    Brody                2    59.0    8    11.40    0.0   64    70           70    +6
9    Mrs Wonderful        3    57.0    9    26.50    5.0   20    56           56    +36
99   Eruption Inthe Sky   2    56.0    99   0.00     0.0   -     64           64    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Gift Of Royal Line 62 58 62 -4 5.0
2 Underdog 52 58 66 -8 5.0 -
3 Indian Spice 70 70 63 +7 5.0 -
4 Samuel Sharpe - 73 63 +10 5.0 -
5 Afterburn 65 62 63 -1 5.0 -
6 Rock My Boat 55 66 61 +5 5.0 -
7 Jabberwocky 61 53 67 -14 2.5 -
8 Brody 64 60 70 -10 0.0 -
9 Mrs Wonderful 20 20 56 -36 5.0 -
99 Eruption Inthe Sky - - 64 -64 0.0 -
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