Official NHA Assessment

Race 3: TAKE A BET WINA NUMBA NUMBA MAIDEN PLATE (F & M) (For Maiden F&M. R15 000 Win bonus ROA Members)

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Line Horse
Donna Mo
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
8 / 10
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    Sukhumvit            3    59.0    1    0.00     4.0   -     69           6     +6
2    Kissing Machine      3    59.0    2    3.25     4.0   -     71           71    +71
3    Donna Mo             2    59.0    3    3.75     0.0   78    78           78    +0
4    Dee Day              4    59.0    4    12.00    2.5   66    72           72    +6
5    Sumiko               2    59.0    5    18.00    0.0   61    77           77    +16
6    Double Joy           2    60.0    6    18.50    0.0   46    79           79    +33
7    Destiny Star         3    59.0    7    25.00    4.0   -     69           69    +69
8    Magic Secret         3    59.0    8    99.99    4.0   -     69           69    +69
99   Dimako's Jet         4    59.0    99   0.00     2.5   -     72           72    +0
99   Whistledown          4    55.0    99   0.00     2.5   -     64           64    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Sukhumvit - 100 6 +94 4.0 -
2 Kissing Machine - 88 71 +17 4.0 -
3 Donna Mo Line 78 89 78 +11 0.0
4 Dee Day 66 53 72 -19 2.5 -
5 Sumiko 61 53 77 -24 0.0 -
6 Double Joy 46 44 79 -35 0.0 -
7 Destiny Star - - 69 -69 4.0 -
8 Magic Secret - 66 69 -3 4.0 -
99 Dimako's Jet - 93 72 +21 2.5 -
99 Whistledown - 63 64 -1 2.5 -
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