Official NHA Assessment

Race 9: WSB.co.za CLASS 5 (Open. Benchmark at 60.0kg = 66)

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Line Horse
On Board
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
3 / 12
Within 2 points
Significant Diffs
7 / 12
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    Double Olympic       4    50.5    1    0.00     3.5   55    46           46    -9
2    Prized Platinum      3    58.5    2    0.30     3.0   63    63           63    +0
3    On Board             3    61.5    3    1.70     3.0   69    69           69    +0
4    Ultra Quick          6    61.5    4    2.80     0.0   69    75           75    +6
5    Dawn Surprise        4    60.0    5    3.10     3.5   66    65           65    -1
6    Indecent Proposal    4    59.0    6    4.90     3.5   64    63           63    -1
7    Happy Wanderer       5    56.5    7    6.20     0.0   59    65           65    +6
8    Si Veloce            4    53.0    8    7.10     3.5   52    51           51    -1
9    Perini Palace        4    59.0    9    7.80     3.5   64    63           63    -1
10   Together Again       5    55.0    10   10.50    0.0   56    62           62    +6
99   Force De Dieu        3    60.0    99   0.00     3.0   -     66           66    +0
99   Stevie Gee           5    59.5    99   0.00     0.0   -     71           71    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Double Olympic 55 53 46 +7 3.5 -
2 Prized Platinum 63 72 63 +9 3.0 -
3 On Board Line 69 66 69 -3 3.0
4 Ultra Quick 69 71 75 -4 0.0 -
5 Dawn Surprise 66 79 65 +14 3.5 -
6 Indecent Proposal 64 65 63 +2 3.5 -
7 Happy Wanderer 59 55 65 -10 0.0 -
8 Si Veloce 52 50 51 -1 3.5 -
9 Perini Palace 64 56 63 -7 3.5 -
10 Together Again 56 55 62 -7 0.0 -
99 Force De Dieu - 64 66 -2 3.0 -
99 Stevie Gee - 65 71 -6 0.0 -
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