Official NHA Assessment

Race 1: MAIDEN PLATE (Maiden Plate Colts & Geldings to carry)

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Line Horse
Bruce's Spirit
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
5 / 7
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    Manvir               3    60.0    1    0.00     4.5   48    48           48    +0
2    Mustatheef           3    60.0    2    2.00     4.5   -     48           48    +48
3    Cha Vez              3    60.0    3    4.00     4.5   -     48           48    +48
4    Bruce's Spirit       6    56.0    4    4.75     0.0   49    49           49    +0
5    Chetan               3    53.5    5    6.00     4.5   47    35           37    -10
6    Kitten Chando        3    60.0    6    7.00     4.5   -     48           48    +48
7    Albar Warning        3    60.0    7    12.00    4.5   -     48           48    +48
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Manvir 48 52 48 +4 4.5 -
2 Mustatheef - 42 48 -6 4.5 -
3 Cha Vez - 55 48 +7 4.5 -
4 Bruce's Spirit Line 49 55 49 +6 0.0
5 Chetan 47 45 37 +8 4.5 -
6 Kitten Chando - - 48 -48 4.5 -
7 Albar Warning - 48 48 ✓ Match 4.5 -
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