Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY WORK RIDERS MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Tanzanite
Reference for assessment
Exact Matches
1 / 14
Calculated = Official
Close Matches
1 / 14
Within 2 points
Significant Diffs
13 / 14
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    Tanzanite            2    60.0    1    0.00     2.5   73    73           73    +0
2    Looking Good         2    60.0    2    4.00     2.5   57    73           73    +16
3    Gutsy Baby           2    60.0    3    4.10     2.5   55    73           73    +18
4    Elusive Bomba        3    60.0    4    5.35     3.5   53    71           71    +18
5    Alleyah's Rocket     3    60.0    5    7.60     3.5   56    71           71    +15
6    Mme Huntress         3    60.0    6    7.70     3.5   70    71           71    +1
7    Timeline             3    60.0    7    8.70     3.5   60    71           71    +11
8    Focal Point          2    60.0    8    8.95     2.5   71    73           73    +2
9    Engelandpark         2    60.0    9    10.45    2.5   70    73           73    +3
10   Caughtubysurprise    3    60.0    10   10.55    3.5   52    71           71    +19
11   Waltzing Doll        2    60.0    11   10.60    2.5   64    73           73    +9
12   Ginger Rood          3    60.0    12   10.85    3.5   53    71           71    +18
13   Bossy Lady           3    60.0    13   14.10    3.5   -     71           71    +71
14   Endizayo             3    60.0    14   14.35    3.5   58    71           71    +13
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Tanzanite Line 73 73 73 ✓ Match 2.5
2 Looking Good 57 64 73 -9 2.5 -
3 Gutsy Baby 55 62 73 -11 2.5 -
4 Elusive Bomba 53 59 71 -12 3.5 -
5 Alleyah's Rocket 56 56 71 -15 3.5 -
6 Mme Huntress 70 61 71 -10 3.5 -
7 Timeline 60 53 71 -18 3.5 -
8 Focal Point 71 64 73 -9 2.5 -
9 Engelandpark 70 66 73 -7 2.5 -
10 Caughtubysurprise 52 52 71 -19 3.5 -
11 Waltzing Doll 64 60 73 -13 2.5 -
12 Ginger Rood 53 53 71 -18 3.5 -
13 Bossy Lady - 45 71 -26 3.5 -
14 Endizayo 58 56 71 -15 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