Official NHA Assessment

Race 2: GOLD STANDARD MAIDEN PLATE (For all Maidens. R15 000 Win bonus RA Members)

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Line Horse
Bluff On Bluff
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
1 / 11
Within 2 points
Significant Diffs
9 / 11
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    Bluff On Bluff       3    60.0    1    0.00     5.0   77    77           77    +0
2    King Of Colts        3    60.0    2    0.50     5.0   -     77           77    +77
3    Line Of Duty         3    60.0    3    0.75     5.0   -     77           77    +77
4    Forever Bill         3    60.0    4    1.50     5.0   75    77           77    +2
5    Navy Strength        3    60.0    5    3.00     5.0   75    77           77    +2
6    Act Of Thunder       4    60.0    6    4.50     6.0   60    75           75    +15
7    Axl                  3    60.0    7    4.75     5.0   -     77           77    +77
8    Castle Time          3    60.0    8    7.50     5.0   -     77           77    +77
9    Negotiator           3    57.5    9    10.25    5.0   -     72           72    +72
10   Sangria's Run        3    60.0    10   13.50    5.0   -     77           77    +77
11   Rivano               3    60.0    11   99.99    5.0   -     77           77    +77
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Bluff On Bluff Line 77 80 77 +3 5.0
2 King Of Colts - 33 77 -44 5.0 -
3 Line Of Duty - 75 77 -2 5.0 -
4 Forever Bill 75 56 77 -21 5.0 -
5 Navy Strength 75 97 77 +20 5.0 -
6 Act Of Thunder 60 55 75 -20 6.0 -
7 Axl - 84 77 +7 5.0 -
8 Castle Time - 60 77 -17 5.0 -
9 Negotiator - - 72 -72 5.0 -
10 Sangria's Run - 40 77 -37 5.0 -
11 Rivano - - 77 -77 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