Official NHA Assessment

Race 3: ALGOA CUP 28 OCTOBER 2022 MAIDEN PLATE (For all Maidens)

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Line Horse
Douglas Devastator
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
4 / 10
Within 2 points
Significant Diffs
4 / 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    Mansooriya           3    56.5    1    0.00     9.0   52    50           50    -2
2    Douglas Devastator   2    57.0    2    0.25     0.0   69    69           69    +0
3    Joe Harman           4    60.0    3    1.75     5.0   51    70           70    +19
4    Belle's First Wave   3    60.0    4    5.75     9.0   58    57           57    -1
5    Jack In The Box      5    60.0    5    6.00     0.0   56    75           75    +19
6    Stepdance            2    57.0    6    6.10     0.0   63    69           69    +6
7    Opening Ceremony     3    60.0    7    11.60    9.0   59    57           57    -2
8    Elusive Jewel        2    53.5    8    12.60    0.0   57    62           62    +5
9    Dream Star           2    53.5    9    12.65    0.0   62    62           62    +0
99   Coup Royal           3    58.5    99   0.00     9.0   -     54           54    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Mansooriya 52 52 50 +2 9.0 -
2 Douglas Devastator Line 69 64 69 -5 0.0
3 Joe Harman 51 54 70 -16 5.0 -
4 Belle's First Wave 58 51 57 -6 9.0 -
5 Jack In The Box 56 53 75 -22 0.0 -
6 Stepdance 63 57 69 -12 0.0 -
7 Opening Ceremony 59 55 57 -2 9.0 -
8 Elusive Jewel 57 57 62 -5 0.0 -
9 Dream Star 62 61 62 -1 0.0 -
99 Coup Royal - 53 54 -1 9.0 -
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