Official NHA Assessment

Race 6: BOOK FOR CHAMPIONS DAY 29 MARCH MR 76 HANDICAP (Open)

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Line Horse
Sigrid Swing
Reference for assessment
Exact Matches
2 / 10
Calculated = Official
Close Matches
4 / 10
Within 2 points
Significant Diffs
3 / 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    Just Var             4    60.5    1    0.00     1.5   77    75           77    +0
2    Theres A Light       4    59.5    2    1.50     1.5   75    76           76    +1
3    Sigrid Swing         4    59.5    3    2.80     1.5   75    75           75    +0
4    Call Me Master       8    55.5    4    3.10     0.0   67    70           70    +3
5    Thambi               5    53.5    5    3.70     0.0   63    65           65    +2
6    Tokyo Medaglia       3    57.5    6    4.60     2.5   77    67           67    -10
7    Viva De Janeiro      5    53.5    7    4.85     0.0   63    64           64    +1
8    Sovereigns Call      4    55.5    8    6.35     1.5   72    65           65    -7
9    Gaelic Dancer        3    56.0    9    7.35     2.5   74    64           64    -10
99   Futurenaire          3    59.0    99   0.00     2.5   -     70           70    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Just Var 77 83 77 +6 1.5 -
2 Theres A Light 75 76 76 ✓ Match 1.5 -
3 Sigrid Swing Line 75 70 75 -5 1.5
4 Call Me Master 67 65 70 -5 0.0 -
5 Thambi 63 55 65 -10 0.0 -
6 Tokyo Medaglia 77 68 67 +1 2.5 -
7 Viva De Janeiro 63 50 64 -14 0.0 -
8 Sovereigns Call 72 70 65 +5 1.5 -
9 Gaelic Dancer 74 64 64 ✓ Match 2.5 -
99 Futurenaire - 72 70 +2 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