Official NHA Assessment

Race 2: GAUTENG GUINEAS DAY 4 FEBRUARY MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Members)

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Line Horse
Gold Agent
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
8 / 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    Articuno             2    60.0    1    0.00     3.5   76    75           75    -1
2    Gold Agent           2    60.0    2    2.00     3.5   75    75           75    +0
3    Bossy Boots          4    60.0    3    2.60     6.0   70    70           70    +0
4    Magical Stones       3    60.0    4    3.50     5.0   53    72           72    +19
5    Feather Dancer       2    58.5    5    3.90     3.5   71    72           72    +1
6    Vathomvlaffie        2    60.0    6    11.15    3.5   73    75           75    +2
7    Signora Bomba        2    60.0    7    21.40    3.5   73    75           75    +2
8    State Of Play        3    60.0    8    21.70    5.0   -     72           72    +72
99   Quiet Strength       3    58.5    99   0.00     5.0   -     69           69    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Articuno 76 80 75 +5 3.5 -
2 Gold Agent Line 75 64 75 -11 3.5
3 Bossy Boots 70 51 70 -19 6.0 -
4 Magical Stones 53 46 72 -26 5.0 -
5 Feather Dancer 71 50 72 -22 3.5 -
6 Vathomvlaffie 73 56 75 -19 3.5 -
7 Signora Bomba 73 69 75 -6 3.5 -
8 State Of Play - 54 72 -18 5.0 -
99 Quiet Strength - - 69 -69 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