Official NHA Assessment

Race 2: BOOK A TABLE CALL 011 681 1796 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 / 10
Calculated = Official
Close Matches
0 / 10
Within 2 points
Significant Diffs
10 / 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    Calantha             4    57.5    1    0.00     6.0   -     74           6     +6
2    Bob                  3    60.0    2    1.25     5.0   73    81           81    +8
3    Secret Chord         4    60.0    3    3.50     6.0   79    79           79    +0
4    Gold Agent           2    57.5    4    6.00     3.5   76    79           79    +3
5    Prized Platinum      3    60.0    5    6.25     5.0   -     81           81    +81
6    Phala Millions       4    60.0    6    8.50     6.0   40    79           79    +39
7    Sacambaya            2    60.0    7    8.60     3.5   80    84           84    +4
8    Highveld Storm       3    60.0    8    10.00    5.0   -     81           81    +81
9    Bryden Bay           2    60.0    9    13.00    3.5   64    84           84    +20
10   Dream State          2    58.5    10   18.00    3.5   61    81           81    +20
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Calantha - 95 6 +89 6.0 -
2 Bob 73 52 81 -29 5.0 -
3 Secret Chord Line 79 92 79 +13 6.0
4 Gold Agent 76 64 79 -15 3.5 -
5 Prized Platinum - 72 81 -9 5.0 -
6 Phala Millions 40 66 79 -13 6.0 -
7 Sacambaya 80 72 84 -12 3.5 -
8 Highveld Storm - 66 81 -15 5.0 -
9 Bryden Bay 64 63 84 -21 3.5 -
10 Dream State 61 58 81 -23 3.5 -
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