Official NHA Assessment

Race 9: NEXT VAAL RACEMEETING THURSDAY 5 JANUARY 66 HANDICAP (Open)

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Line Horse
Rattle Bag
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
1 / 12
Within 2 points
Significant Diffs
7 / 12
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    In Cahoots           6    60.5    1    0.00     0.0   67    66           67    +0
2    Rattle Bag           6    59.5    2    4.25     0.0   65    65           65    +0
3    Skyfull              2    54.0    3    4.75     0.0   66    53           56    -10
4    Rose Willow          4    52.0    4    5.25     3.0   50    43           43    -7
5    Mix The Magic        3    55.0    5    5.30     6.0   56    43           46    -10
6    Pendragon            5    57.5    6    5.75     0.0   73    60           63    -10
7    Labrausco            2    49.5    7    6.00     0.0   59    44           49    -10
8    Gilda Gray           3    58.5    8    7.25     6.0   63    50           53    -10
9    Global Approach      4    56.5    9    19.00    3.0   59    52           52    -7
10   Song Of Angels       3    48.5    10   23.00    6.0   50    30           40    -10
11   Cross Examiner       3    59.0    11   35.00    6.0   64    51           54    -10
99   Risky Business       3    58.0    99   0.00     6.0   -     49           49    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 In Cahoots 67 54 67 -13 0.0 -
2 Rattle Bag Line 65 71 65 +6 0.0
3 Skyfull 66 54 56 -2 0.0 -
4 Rose Willow 50 48 43 +5 3.0 -
5 Mix The Magic 56 52 46 +6 6.0 -
6 Pendragon 73 73 63 +10 0.0 -
7 Labrausco 59 70 49 +21 0.0 -
8 Gilda Gray 63 64 53 +11 6.0 -
9 Global Approach 59 56 52 +4 3.0 -
10 Song Of Angels 50 44 40 +4 6.0 -
11 Cross Examiner 64 50 54 -4 6.0 -
99 Risky Business - 75 49 +26 6.0 -
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