Official NHA Assessment

Race 7: GREYVILLE CONVENTION CENTRE MR 83 HANDICAP (Open)

Back to Race
Line Horse
Purple Nkanyezi
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
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Kuuma                3    57.0    1    0.00     3.0   84    70           84    +0
2    Ralph The Rascal     8    59.5    2    1.05     0.0   82    85           85    +3
3    Purple Nkanyezi      5    57.5    3    3.45     0.0   78    78           78    +0
4    Pink Floyd           6    55.5    4    4.35     0.0   74    73           73    -1
5    Farland              6    57.0    5    5.10     0.0   77    76           76    -1
6    Blush Of Dawn        8    57.5    6    8.50     0.0   78    77           77    -1
7    Karoo Lark           5    60.5    7    10.00    0.0   84    83           83    -1
8    Tight Five           4    54.0    8    13.50    2.0   79    66           69    -10
9    Uncomplicated        3    53.0    9    17.50    3.0   76    62           66    -10
10   African Sunrise      5    57.0    10   23.20    0.0   77    76           76    -1
99   Majorca Palace       4    57.0    99   0.00     2.0   -     72           72    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Kuuma 84 86 84 +2 3.0 -
2 Ralph The Rascal 82 73 85 -12 0.0 -
3 Purple Nkanyezi Line 78 80 78 +2 0.0
4 Pink Floyd 74 65 73 -8 0.0 -
5 Farland 77 59 76 -17 0.0 -
6 Blush Of Dawn 78 64 77 -13 0.0 -
7 Karoo Lark 84 83 83 ✓ Match 0.0 -
8 Tight Five 79 58 69 -11 2.0 -
9 Uncomplicated 76 65 66 -1 3.0 -
10 African Sunrise 77 72 76 -4 0.0 -
99 Majorca Palace - 51 72 -21 2.0 -
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