Official NHA Assessment

Race 7: play.tabonlne.co.za CLASS 4 (F & M) (For Fillies & Mares. Benchmark at 60.0kg = 78)

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Line Horse
Summer Night City
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
6 / 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    Royal Invitation     5    58.0    1    0.00     0.0   78    77           77    -1
2    Typeface             2    58.0    2    1.25     0.0   78    81           81    +3
3    Summer Night City    5    53.0    3    3.50     0.0   68    68           68    +0
4    Supreme Dream        3    60.0    4    4.50     3.5   82    74           74    -8
5    Peut Etre Moi        3    60.0    5    5.50     3.5   75    74           74    -1
6    Costa Smeralda       3    52.5    6    5.80     3.5   53    59           59    +6
7    Defining Moment      2    53.5    7    15.05    0.0   69    68           68    -1
8    Jewlray              3    52.0    8    99.99    3.5   56    58           58    +2
99   Virginia Sweet       2    57.0    99   0.00     0.0   -     75           75    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Royal Invitation 78 99 77 +22 0.0 -
2 Typeface 78 78 81 -3 0.0 -
3 Summer Night City Line 68 57 68 -11 0.0
4 Supreme Dream 82 83 74 +9 3.5 -
5 Peut Etre Moi 75 68 74 -6 3.5 -
6 Costa Smeralda 53 53 59 -6 3.5 -
7 Defining Moment 69 64 68 -4 0.0 -
8 Jewlray 56 53 58 -5 3.5 -
99 Virginia Sweet - 92 75 +17 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