Official NHA Assessment

Race 4: WWW.TAB4RACING.COM MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Secret Chord
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
7 / 9
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    Secret Chord         4    60.0    1    0.00     2.0   74    74           74    +0
2    Pacific              4    60.0    2    2.25     2.0   60    74           74    +14
3    Inspector James      3    57.0    3    4.25     1.5   -     69           69    +69
4    Marieskop            3    57.5    4    5.50     1.5   -     70           70    +70
5    Espinoza             3    57.0    5    6.00     1.5   -     69           69    +69
6    Hat Man              4    60.0    6    10.25    2.0   60    74           74    +14
7    King Harry           4    60.0    7    10.50    2.0   -     74           74    +74
8    Grand Oasis          3    57.0    8    12.25    1.5   -     69           69    +69
9    Ringho               4    60.0    9    12.50    2.0   50    74           74    +24
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Secret Chord Line 74 92 74 +18 2.0
2 Pacific 60 50 74 -24 2.0 -
3 Inspector James - 73 69 +4 1.5 -
4 Marieskop - 50 70 -20 1.5 -
5 Espinoza - 97 69 +28 1.5 -
6 Hat Man 60 60 74 -14 2.0 -
7 King Harry - 55 74 -19 2.0 -
8 Grand Oasis - 72 69 +3 1.5 -
9 Ringho 50 60 74 -14 2.0 -
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