Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY RACING WORK RIDERS MAIDEN PLATE (F & M) (For Maiden (F&M) R15 000 Win Bonus ROA Members)

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Line Horse
Magenta
Reference for assessment
Exact Matches
1 / 13
Calculated = Official
Close Matches
1 / 13
Within 2 points
Significant Diffs
5 / 13
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    Fluid Motion         3    60.0    1    0.00     5.0   50    57           56    +6
2    Magenta              4    60.0    2    2.00     6.0   55    55           55    +0
3    Antonia Augusta      2    60.0    3    4.25     3.5   49    60           60    +11
4    Little Miss Kj       2    60.0    4    4.50     3.5   58    60           60    +2
5    Wonder Woman         6    60.0    5    5.50     0.0   45    67           67    +22
6    Tide Is High         3    60.0    6    6.75     5.0   65    57           57    -8
7    Miss United States   3    60.0    7    8.00     5.0   42    57           57    +15
8    Sundrop              6    60.0    8    8.50     0.0   50    67           67    +17
9    Girl Scout           3    60.0    9    13.25    5.0   57    57           57    +0
10   Glitterfox           2    60.0    10   13.35    3.5   59    60           60    +1
11   Montana Nymph        2    60.0    11   15.60    3.5   61    60           60    -1
12   Spring Fever         2    60.0    12   17.35    3.5   64    60           60    -4
13   Nairobi              3    60.0    13   17.85    5.0   64    57           57    -7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Fluid Motion 50 50 56 -6 5.0 -
2 Magenta Line 55 59 55 +4 6.0
3 Antonia Augusta 49 57 60 -3 3.5 -
4 Little Miss Kj 58 53 60 -7 3.5 -
5 Wonder Woman 45 43 67 -24 0.0 -
6 Tide Is High 65 57 57 ✓ Match 5.0 -
7 Miss United States 42 52 57 -5 5.0 -
8 Sundrop 50 48 67 -19 0.0 -
9 Girl Scout 57 54 57 -3 5.0 -
10 Glitterfox 59 57 60 -3 3.5 -
11 Montana Nymph 61 57 60 -3 3.5 -
12 Spring Fever 64 53 60 -7 3.5 -
13 Nairobi 64 53 57 -4 5.0 -
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