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
2 / 13
Calculated = Official
Close Matches
5 / 13
Within 2 points
Significant Diffs
6 / 13
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Perini Palace        4    53.0    1    0.00     2.5   52    47           52    +0
2    Sahara Dawn          4    60.0    2    3.25     2.5   66    63           63    -3
3    Vava Vegas           5    61.5    3    5.50     0.0   69    69           69    +0
4    Bob Lee Swagger      4    55.0    4    6.30     2.5   59    51           51    -8
5    Great Barrier        4    59.5    5    6.40     2.5   65    60           60    -5
6    Can't Catch Me       5    53.0    6    7.00     0.0   52    52           52    +0
7    Call Me Master       8    60.5    7    9.30     0.0   67    67           67    +0
8    Kylie's Angel        3    55.0    8    10.10    5.0   64    46           54    -10
9    Count Your Chances   5    53.0    9    10.80    0.0   52    52           52    +0
10   Mix The Magic        3    53.5    10   11.60    5.0   53    43           43    -10
11   Samthewiseman        5    57.5    11   14.00    0.0   61    61           61    +0
12   Wilkies              2    52.0    12   29.50    0.0   50    50           50    +0
99   Red Knot             4    58.0    99   0.00     2.5   -     57           57    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Perini Palace 52 56 52 +4 2.5 -
2 Sahara Dawn 66 52 63 -11 2.5 -
3 Vava Vegas Line 69 58 69 -11 0.0
4 Bob Lee Swagger 59 53 51 +2 2.5 -
5 Great Barrier 65 60 60 ✓ Match 2.5 -
6 Can't Catch Me 52 58 52 +6 0.0 -
7 Call Me Master 67 65 67 -2 0.0 -
8 Kylie's Angel 64 60 54 +6 5.0 -
9 Count Your Chances 52 51 52 -1 0.0 -
10 Mix The Magic 53 52 43 +9 5.0 -
11 Samthewiseman 61 52 61 -9 0.0 -
12 Wilkies 50 50 50 ✓ Match 0.0 -
99 Red Knot - 62 57 +5 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