Official NHA Assessment

Race 2: BET WITH TOTE MAIDEN PLATE (For all Maidens)

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Line Horse
Johnny Boy
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
11 / 11
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    Chicarito            3    56.0    1    0.00     9.5   -     -8           -     +0
2    The Marquee          3    60.0    2    0.70     9.5   -     -            -     +0
3    Spaarne Rivier       3    60.0    3    1.20     9.5   -     -            -     +0
4    Johnny Boy           3    60.0    4    6.20     9.5   -     -            -     +0
5    William Of Orange    2    60.0    5    8.20     6.5   -     6            6     +6
6    Drielandenpunt       3    60.0    6    10.80    9.5   -     -            -     +0
7    Amber Alert          2    60.0    7    11.90    6.5   73    6            63    -10
8    Devil's Peak         3    60.0    8    12.70    9.5   -     -            -     +0
9    Hammerhead           3    60.0    9    13.00    9.5   -     -            -     +0
10   Mysterious Erik      3    60.0    10   20.50    9.5   -     -            -     +0
11   Trigger Point        3    60.0    11   23.80    9.5   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Chicarito - 87 - +87 9.5 -
2 The Marquee - 85 - +85 9.5 -
3 Spaarne Rivier - 84 - +84 9.5 -
4 Johnny Boy Line - 86 - +86 9.5
5 William Of Orange - 63 6 +57 6.5 -
6 Drielandenpunt - 74 - +74 9.5 -
7 Amber Alert 73 79 63 +16 6.5 -
8 Devil's Peak - 72 - +72 9.5 -
9 Hammerhead - 74 - +74 9.5 -
10 Mysterious Erik - 63 - +63 9.5 -
11 Trigger Point - 68 - +68 9.5 -
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