Official NHA Assessment

Race 3: BOOK FOR CHARITY MILE MAIDEN PLATE (For all Maidens)

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Line Horse
King Of Rome
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
0 / 12
Within 2 points
Significant Diffs
11 / 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    King Of Rome         2    58.0    1    0.00     0.0   76    76           76    +0
2    Big Guy              3    60.0    2    0.60     9.0   65    67           67    +2
3    Otto Luyken          5    58.0    3    0.75     0.0   -     80           80    +80
4    Gregor Macgregor     4    60.0    4    1.75     5.0   58    73           73    +15
5    Future Pearl         2    58.0    5    2.75     0.0   -     78           78    +78
6    Spring Will Come     3    60.0    6    3.75     9.0   64    63           63    -1
7    Labrausco            2    58.0    7    11.00    0.0   56    76           76    +20
8    Royal Raphael        3    58.0    8    11.10    9.0   -     58           58    +58
9    Kalahari Chrome      7    60.0    9    11.90    0.0   53    80           80    +27
10   Alabaster            3    60.0    10   12.75    9.0   55    62           62    +7
11   Super World          3    58.0    11   14.25    9.0   -     58           58    +58
12   Hephaestus           3    58.0    12   99.99    9.0   -     58           58    +58
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 King Of Rome Line 76 83 76 +7 0.0
2 Big Guy 65 60 67 -7 9.0 -
3 Otto Luyken - 116 80 +36 0.0 -
4 Gregor Macgregor 58 63 73 -10 5.0 -
5 Future Pearl - 114 78 +36 0.0 -
6 Spring Will Come 64 72 63 +9 9.0 -
7 Labrausco 56 70 76 -6 0.0 -
8 Royal Raphael - 54 58 -4 9.0 -
9 Kalahari Chrome 53 50 80 -30 0.0 -
10 Alabaster 55 53 62 -9 9.0 -
11 Super World - - 58 -58 9.0 -
12 Hephaestus - 10 58 -48 9.0 -
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