Official NHA Assessment

Race 2: BETWAY MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Pioneer Square
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
8 / 9
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    One More Star        3    58.0    1    0.00     7.0   83    -5           -     -83
2    Pioneer Square       3    58.0    2    0.30     7.0   -     -            -     +0
3    Obsidian             3    58.0    3    6.00     7.0   -     -5           -     +0
4    Prolific Star        3    55.5    4    9.50     7.0   66    -10          56    -10
5    Bad Medicine         3    58.0    5    10.25    7.0   70    -5           60    -10
6    Primal Quest         3    58.0    6    11.00    7.0   66    -5           56    -10
7    The Ultimate King    3    58.0    7    13.25    7.0   -     -5           -     +0
8    Primal Fear          2    58.0    8    17.50    0.0   55    9            45    -10
9    Gold De Grace        4    60.0    9    18.25    4.0   57    5            47    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 One More Star 83 87 - +87 7.0 -
2 Pioneer Square Line - 101 - +101 7.0
3 Obsidian - 97 - +97 7.0 -
4 Prolific Star 66 64 56 +8 7.0 -
5 Bad Medicine 70 100 60 +40 7.0 -
6 Primal Quest 66 81 56 +25 7.0 -
7 The Ultimate King - 117 - +117 7.0 -
8 Primal Fear 55 51 45 +6 0.0 -
9 Gold De Grace 57 51 47 +4 4.0 -
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