Official NHA Assessment

Race 5: LONSDALE STIRRUP CUP (Grade 3) (Handicap)

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Line Horse
One Way Traffic
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
3 / 9
Within 2 points
Significant Diffs
2 / 9
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    Shango               5    58.0    1    0.00     0.0   108   104          108   +0
2    Flying Bull          4    53.5    2    0.25     1.0   99    93           93    -6
3    One Way Traffic      4    56.0    3    0.65     1.0   104   104          104   +0
4    Chewbaca             5    52.5    4    1.55     0.0   79    98           98    +19
5    Shangani             4    60.0    5    2.05     1.0   112   110          110   -2
6    Decorated            4    52.5    6    2.45     1.0   84    95           95    +11
7    Rex Union            4    52.5    7    2.75     1.0   80    94           94    +14
8    Salvator Mundi       4    54.0    8    2.95     1.0   100   97           97    -3
99   Green Haze           6    54.0    99   0.00     0.0   -     96           96    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Shango 108 105 108 -3 0.0 -
2 Flying Bull 99 98 93 +5 1.0 -
3 One Way Traffic Line 104 109 104 +5 1.0
4 Chewbaca 79 87 98 -11 0.0 -
5 Shangani 112 118 110 +8 1.0 -
6 Decorated 84 96 95 +1 1.0 -
7 Rex Union 80 97 94 +3 1.0 -
8 Salvator Mundi 100 98 97 +1 1.0 -
99 Green Haze - 98 96 +2 0.0 -
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