Official NHA Assessment

Race 3: WWW.TAB4RACING.COM MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Members)

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Line Horse
Happy Mo
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
9 / 9
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    Patches Of Grey      4    60.0    1    0.00     2.5   -     2            2     +2
2    Play With Fire       4    60.0    2    0.25     2.5   73    2            63    -10
3    Happy Mo             3    60.0    3    1.75     5.0   -     -            -     +0
4    Kadizora             4    60.0    4    2.25     2.5   -     5            5     +5
5    Erupt The Dawn       3    58.5    5    2.75     5.0   -     -4           -     +0
6    Teo Torriatte        4    60.0    6    4.00     2.5   78    3            68    -10
7    Paradise Flower      3    60.0    7    12.00    5.0   57    -3           47    -10
99   Donna Mo             2    60.0    99   0.00     0.0   -     7            7     +0
99   Atchison Topeka      3    60.0    99   0.00     5.0   -     -3           -3    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Patches Of Grey - 62 2 +60 2.5 -
2 Play With Fire 73 79 63 +16 2.5 -
3 Happy Mo Line - 89 - +89 5.0
4 Kadizora - 72 5 +67 2.5 -
5 Erupt The Dawn - 74 - +74 5.0 -
6 Teo Torriatte 78 94 68 +26 2.5 -
7 Paradise Flower 57 37 47 -10 5.0 -
99 Donna Mo - 89 7 +82 0.0 -
99 Atchison Topeka - 51 -3 +54 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