Official NHA Assessment

Race 1: 4RACING WELCOMES YOU WORK RIDERS MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Perini Palace
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    Rock Of Bismantova   3    60.0    1    0.00     1.5   75    61           61    -14
2    Vibe Sa              2    60.0    2    0.75     0.5   80    63           70    -10
3    Perini Palace        4    57.5    3    9.00     2.0   55    55           55    +0
4    Potberrie            2    57.0    4    13.25    0.5   -     57           57    +57
5    Brightest Blaze      3    60.0    5    14.50    1.5   48    61           61    +13
6    Hat Man              4    58.5    6    15.00    2.0   64    57           57    -7
7    Summer Shade         4    60.0    7    16.00    2.0   62    60           60    -2
8    Sovereign Crown      3    57.0    8    16.25    1.5   -     55           55    +55
9    It's Up To Me        2    57.5    9    26.50    0.5   50    58           58    +8
10   Despina              4    57.5    10   30.25    2.0   -     55           55    +55
11   Queen's Express      3    58.0    11   99.99    1.5   28    57           57    +29
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Rock Of Bismantova 75 80 61 +19 1.5 -
2 Vibe Sa 80 92 70 +22 0.5 -
3 Perini Palace Line 55 56 55 +1 2.0
4 Potberrie - 105 57 +48 0.5 -
5 Brightest Blaze 48 43 61 -18 1.5 -
6 Hat Man 64 60 57 +3 2.0 -
7 Summer Shade 62 52 60 -8 2.0 -
8 Sovereign Crown - 68 55 +13 1.5 -
9 It's Up To Me 50 45 58 -13 0.5 -
10 Despina - - 55 -55 2.0 -
11 Queen's Express 28 28 57 -29 1.5 -
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