Official NHA Assessment

Race 1: #THISISRACING WELCOMES YOU WORK RIDERS MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Risky Business
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
6 / 8
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    Verolina             3    60.0    1    0.00     5.0   78    63           63    -15
2    Namibsroos           3    60.0    2    1.50     5.0   54    63           63    +9
3    Risky Business       3    60.0    3    1.60     5.0   63    63           63    +0
4    La Banquiere         4    60.0    4    3.50     6.0   50    61           61    +11
5    Frosted Ice          4    60.0    5    6.50     6.0   52    61           61    +9
6    Lil Wahoo            4    60.0    6    10.50    6.0   50    61           61    +11
7    Hydrangea            3    60.0    7    13.50    5.0   -     63           63    +63
8    Red Hot              3    60.0    8    14.00    5.0   52    63           63    +11
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Verolina 78 71 63 +8 5.0 -
2 Namibsroos 54 57 63 -6 5.0 -
3 Risky Business Line 63 75 63 +12 5.0
4 La Banquiere 50 51 61 -10 6.0 -
5 Frosted Ice 52 49 61 -12 6.0 -
6 Lil Wahoo 50 56 61 -5 6.0 -
7 Hydrangea - 59 63 -4 5.0 -
8 Red Hot 52 56 63 -7 5.0 -
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