Official NHA Assessment

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

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Line Horse
Manvir
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
1 / 6
Within 2 points
Significant Diffs
4 / 6
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    Regulate             3    60.0    1    0.00     4.5   -     48           6     +6
2    Emily's Song (ZIM)   4    53.5    2    0.25     5.0   -     34           34    +34
3    Manvir               3    60.0    3    5.25     4.5   48    48           48    +0
4    Bruce's Spirit       6    60.0    4    6.00     0.0   -     57           57    +57
5    Cha Vez              3    60.0    5    15.00    4.5   -     48           48    +48
6    Kitten Chando        3    56.0    6    20.00    4.5   -     40           40    +40
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Regulate - 79 6 +73 4.5 -
2 Emily's Song (ZIM) - 66 34 +32 5.0 -
3 Manvir Line 48 52 48 +4 4.5
4 Bruce's Spirit - 55 57 -2 0.0 -
5 Cha Vez - 55 48 +7 4.5 -
6 Kitten Chando - - 40 -40 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