Official NHA Assessment

Race 7: GREYVILLE CONVENTION CENTRE MR 96 HANDICAP (Open)

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Line Horse
Winter Waves
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
4 / 11
Within 2 points
Significant Diffs
6 / 11
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    Proud Master         3    60.5    1    0.00     9.5   97    78           97    +0
2    Coin Spinner         3    60.5    2    1.05     9.5   100   78           90    -10
3    Winter Waves         7    53.5    3    2.35     0.0   83    83           83    +0
4    Andy Coogle          2    48.0    4    2.65     6.5   78    59           68    -10
5    Tread Swiftly        4    61.0    5    2.95     11.0  98    76           88    -10
6    Smorgasbord          6    61.5    6    3.85     0.0   99    99           99    +0
7    African Skyline      6    61.5    7    6.95     0.0   99    99           99    +0
8    Hope Is Power        3    53.5    8    8.05     9.5   83    64           73    -10
9    Kupholiwe            2    60.5    9    8.75     6.5   97    84           87    -10
10   Diani                5    61.0    10   11.35    0.0   98    98           98    +0
11   Hot Pearl            2    60.5    11   18.55    6.5   97    84           87    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Proud Master 97 97 97 ✓ Match 9.5 -
2 Coin Spinner 100 101 90 +11 9.5 -
3 Winter Waves Line 83 77 83 -6 0.0
4 Andy Coogle 78 83 68 +15 6.5 -
5 Tread Swiftly 98 90 88 +2 11.0 -
6 Smorgasbord 99 77 99 -22 0.0 -
7 African Skyline 99 98 99 -1 0.0 -
8 Hope Is Power 83 80 73 +7 9.5 -
9 Kupholiwe 97 94 87 +7 6.5 -
10 Diani 98 96 98 -2 0.0 -
11 Hot Pearl 97 90 87 +3 6.5 -
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