Official NHA Assessment

Race 8: NEXT VAAL RACEMEETING TUESDAY 26 APRIL FM 77 DIVIDED HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Bella Rosa
Reference for assessment
Exact Matches
0 / 14
Calculated = Official
Close Matches
2 / 14
Within 2 points
Significant Diffs
10 / 14
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    Wokonda              3    58.5    1    0.00     2.5   79    68           79    +0
2    Bella Rosa           5    52.0    2    0.75     0.0   64    64           64    +0
3    Mamaquera            5    58.0    3    1.00     0.0   73    76           76    +3
4    English Primrose     3    54.0    4    4.00     2.5   69    60           60    -9
5    Devilish Dancer      4    56.0    5    4.75     1.0   69    66           66    -3
6    Greek Miss           3    60.0    6    5.00     2.5   82    71           72    -10
7    Elusive Woman        4    59.5    7    5.75     1.0   76    73           73    -3
8    Petunia              4    52.5    8    8.50     1.0   57    59           59    +2
9    Theroseofbecharre    3    52.0    9    9.25     2.5   69    55           59    -10
10   Damova               3    58.0    10   9.50     2.5   78    67           68    -10
11   Zulu War Cry         4    52.0    11   12.50    1.0   50    58           58    +8
99   Ms Flower Power      4    49.0    99   0.00     1.0   -     52           52    +0
99   You Deserve It       4    59.0    99   0.00     1.0   -     72           72    +0
99   Saint Anastasia      3    56.5    99   0.00     2.5   -     64           64    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Wokonda 79 89 79 +10 2.5 -
2 Bella Rosa Line 64 58 64 -6 0.0
3 Mamaquera 73 60 76 -16 0.0 -
4 English Primrose 69 58 60 -2 2.5 -
5 Devilish Dancer 69 50 66 -16 1.0 -
6 Greek Miss 82 91 72 +19 2.5 -
7 Elusive Woman 76 65 73 -8 1.0 -
8 Petunia 57 47 59 -12 1.0 -
9 Theroseofbecharre 69 66 59 +7 2.5 -
10 Damova 78 85 68 +17 2.5 -
11 Zulu War Cry 50 53 58 -5 1.0 -
99 Ms Flower Power - 61 52 +9 1.0 -
99 You Deserve It - 67 72 -5 1.0 -
99 Saint Anastasia - 63 64 -1 2.5 -
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