Official NHA Assessment

Race 2: BETWAY MAIDEN PLATE (3-year-olds) (For Maiden 3-year-olds)

Back to Race
Line Horse
Matroosberg
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
3 / 8
Within 2 points
Significant Diffs
4 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Matroosberg          2    60.0    1    0.00     0.0   82    82           82    +0
2    My Lucky Charm       3    60.0    2    1.40     9.0   -     67           67    +67
3    Winchester           2    60.0    3    3.10     0.0   76    84           84    +8
4    Onceinabluemoon      2    57.0    4    3.40     0.0   -     77           77    +77
5    Emerald City         2    60.0    5    3.50     0.0   69    83           83    +14
6    Emerald Countess     2    57.0    6    6.25     0.0   -     76           76    +76
7    Oklahoma Smokeshow   2    60.0    7    13.00    0.0   -     82           82    +82
99   Thoonsil             3    60.0    99   0.00     9.0   -     64           64    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Matroosberg Line 82 82 82 ✓ Match 0.0
2 My Lucky Charm - 73 67 +6 9.0 -
3 Winchester 76 69 84 -15 0.0 -
4 Onceinabluemoon - 75 77 -2 0.0 -
5 Emerald City 69 71 83 -12 0.0 -
6 Emerald Countess - 72 76 -4 0.0 -
7 Oklahoma Smokeshow - 80 82 -2 0.0 -
99 Thoonsil - 77 64 +13 9.0 -
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