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
Vathomvlaffie
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
3 / 10
Within 2 points
Significant Diffs
7 / 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    Inafix               4    60.0    1    0.00     7.0   72    72           70    -2
2    Glawari              2    57.5    2    0.75     4.0   72    73           73    +1
3    Vathomvlaffie        2    57.5    3    2.00     4.0   73    73           73    +0
4    Prized Platinum      3    60.0    4    2.05     6.0   -     74           74    +74
5    Bob                  3    60.0    5    5.50     6.0   74    74           74    +0
6    Coppola              4    60.0    6    6.75     7.0   -     72           72    +72
7    Sky On Fire          4    60.0    7    8.50     7.0   57    72           72    +15
8    Sovereigns Call      4    60.0    8    8.75     7.0   67    72           72    +5
99   Statesman            2    60.0    99   0.00     4.0   -     78           78    +0
99   Silken Sunrise       4    57.5    99   0.00     7.0   -     67           67    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Inafix 72 69 70 -1 7.0 -
2 Glawari 72 65 73 -8 4.0 -
3 Vathomvlaffie Line 73 56 73 -17 4.0
4 Prized Platinum - 72 74 -2 6.0 -
5 Bob 74 52 74 -22 6.0 -
6 Coppola - 83 72 +11 7.0 -
7 Sky On Fire 57 60 72 -12 7.0 -
8 Sovereigns Call 67 70 72 -2 7.0 -
99 Statesman - 63 78 -15 4.0 -
99 Silken Sunrise - - 67 -67 7.0 -
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