Official NHA Assessment

Race 7: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 MR 66 HANDICAP (Open)

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Line Horse
Vava Vegas
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
6 / 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    Calida               2    61.5    1    0.00     0.0   69    66           69    +0
2    World Heritage       2    49.5    2    1.30     0.0   53    45           45    -8
3    Vava Vegas           5    57.0    3    1.70     0.0   60    60           60    +0
4    Can't Catch Me       5    56.5    4    4.70     0.0   59    56           56    -3
5    Mattiazo             4    58.5    5    4.75     4.0   63    52           53    -10
6    King Bluetooth       2    54.5    6    5.00     0.0   69    52           59    -10
7    Sunshine Day         4    61.5    7    5.75     4.0   69    58           59    -10
8    Northern Kitten      3    56.5    8    6.00     7.0   59    42           49    -10
9    Universal Girl (IRE  4    59.0    9    7.30     4.0   65    53           55    -10
10   Lapis Lazuli         3    60.0    10   8.30     7.0   66    49           56    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Calida 69 72 69 +3 0.0 -
2 World Heritage 53 55 45 +10 0.0 -
3 Vava Vegas Line 60 58 60 -2 0.0
4 Can't Catch Me 59 58 56 +2 0.0 -
5 Mattiazo 63 69 53 +16 4.0 -
6 King Bluetooth 69 53 59 -6 0.0 -
7 Sunshine Day 69 69 59 +10 4.0 -
8 Northern Kitten 59 67 49 +18 7.0 -
9 Universal Girl (IRE) 65 65 55 +10 4.0 -
10 Lapis Lazuli 66 59 56 +3 7.0 -
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