Official NHA Assessment

Race 3: www.tabgold.co.za MAIDEN PLATE (For all Maidens)

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Line Horse
Spy Master
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
0 / 10
Within 2 points
Significant Diffs
9 / 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    Spy Master           3    60.0    1    0.00     2.5   -     -            -     +0
2    Giants Castle        4    60.0    2    2.20     1.0   55    6            45    -10
3    Cup Of Magic         3    60.0    3    2.25     2.5   -     3            3     +3
4    Clean Slate          3    60.0    4    3.05     2.5   69    2            59    -10
5    High Flyby           3    57.0    5    3.65     2.5   68    -5           58    -10
6    Music Box Special    3    58.5    6    7.15     2.5   49    -3           39    -10
7    Bombay Circus        4    60.0    7    7.45     1.0   53    3            43    -10
8    William The Good     3    57.5    8    7.70     2.5   -     -5           -     +0
9    Ready Freddy         3    60.0    9    9.00     2.5   -     -            -     +0
99   Gentle Rain          4    60.0    99   0.00     1.0   -     3            3     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Spy Master Line - 67 - +67 2.5
2 Giants Castle 55 64 45 +19 1.0 -
3 Cup Of Magic - 58 3 +55 2.5 -
4 Clean Slate 69 70 59 +11 2.5 -
5 High Flyby 68 64 58 +6 2.5 -
6 Music Box Special 49 53 39 +14 2.5 -
7 Bombay Circus 53 49 43 +6 1.0 -
8 William The Good - 38 - +38 2.5 -
9 Ready Freddy - 47 - +47 2.5 -
99 Gentle Rain - - 3 -3 1.0 -
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