Official NHA Assessment

Race 2: AIRPORTS COMPANY OF ZIMBABWE MERIT RATED 67 HANDICAP (F&M) (Open to fillies and mares only)

Back to Race
Line Horse
Days Gone By
Reference for assessment
Exact Matches
0 / 4
Calculated = Official
Close Matches
1 / 4
Within 2 points
Significant Diffs
1 / 4
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Nandine              3    52.5    1    0.00     1.0   54    51           54    +0
2    Cutback              6    60.0    2    0.05     0.0   67    68           68    +1
3    Days Gone By         3    53.0    3    4.05     1.0   53    53           53    +0
4    Chetan               3    52.0    4    7.05     1.0   46    50           50    +4
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Nandine 54 60 54 +6 1.0 -
2 Cutback 67 63 68 -5 0.0 -
3 Days Gone By Line 53 51 53 -2 1.0
4 Chetan 46 45 50 -5 1.0 -
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