Official NHA Assessment

Race 5: GAUTENG GUINEAS DAY 1 FEBRUARY MR 96 HANDICAP (Open)

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Line Horse
Royal Edition
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
3 / 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    Forgiveness          4    55.5    1    0.00     3.0   88    86           88    +0
2    Scarlett Pimpernel   2    55.0    2    2.25     0.0   90    94           94    +4
3    Royal Edition        4    54.0    3    2.50     3.0   85    85           85    +0
4    Captainofthegreen    3    60.0    4    2.55     6.0   96    91           91    -5
5    Littlemarysunshine   2    56.5    5    5.55     0.0   89    94           94    +5
6    Towers Of Gold       3    52.5    6    6.15     6.0   93    74           83    -10
7    Jordan               4    57.0    7    7.15     3.0   91    89           89    -2
8    Imperial Master      4    58.0    8    8.65     3.0   92    91           91    -1
9    Rule Book            6    60.0    9    9.15     0.0   96    101          101   +5
10   George Handel        4    56.5    10   11.25    3.0   90    88           88    -2
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Forgiveness 88 94 88 +6 3.0 -
2 Scarlett Pimpernel 90 90 94 -4 0.0 -
3 Royal Edition Line 85 92 85 +7 3.0
4 Captainofthegreen 96 96 91 +5 6.0 -
5 Littlemarysunshine 89 95 94 +1 0.0 -
6 Towers Of Gold 93 93 83 +10 6.0 -
7 Jordan 91 88 89 -1 3.0 -
8 Imperial Master 92 90 91 -1 3.0 -
9 Rule Book 96 92 101 -9 0.0 -
10 George Handel 90 85 88 -3 3.0 -
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