Official NHA Assessment

Race 5: BETWAY SUMMER CUP 29 NOVEMBER MR 80 HANDICAP (Open)

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Line Horse
Twentytwentyvision
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
5 / 8
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    Rafa Bay             2    58.0    1    0.00     5.5   84    76           84    +0
2    Vanakkam             2    53.5    2    0.20     5.5   83    67           73    -10
3    Top Division         2    60.5    3    0.50     5.5   92    81           82    -10
4    Twentytwentyvision   2    61.0    4    1.90     5.5   82    82           82    +0
5    Longsword            2    59.0    5    2.80     5.5   81    78           78    -3
6    Inafix               4    56.5    6    3.50     10.0  73    64           64    -9
7    Fifty Ways           2    59.0    7    6.25     5.5   89    78           79    -10
8    Nou Praat Jy         3    55.0    8    7.50     8.5   81    64           71    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Rafa Bay 84 96 84 +12 5.5 -
2 Vanakkam 83 93 73 +20 5.5 -
3 Top Division 92 90 82 +8 5.5 -
4 Twentytwentyvision Line 82 80 82 -2 5.5
5 Longsword 81 72 78 -6 5.5 -
6 Inafix 73 69 64 +5 10.0 -
7 Fifty Ways 89 81 79 +2 5.5 -
8 Nou Praat Jy 81 81 71 +10 8.5 -
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