Official NHA Assessment

Race 4: TAB TELEBET 0861 000 822 MAIDEN PLATE (F & M) (For Maiden F&M. R15 000 Win bonus ROA Members)

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Line Horse
Villa Semaya
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
8 / 11
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    Regal Daughter       2    59.0    1    0.00     0.0   76    76           76    +0
2    Kadizora             4    59.0    2    0.75     2.5   -     75           75    +75
3    Patches Of Grey      4    59.0    3    4.25     2.5   -     72           72    +72
4    Villa Semaya         2    59.0    4    5.00     0.0   76    76           76    +0
5    Dimako's Jet         4    59.0    5    5.75     2.5   -     71           71    +71
6    Darling Harbour      4    59.0    6    7.00     2.5   71    71           71    +0
7    Arctic Commander     2    59.0    7    11.00    0.0   73    76           76    +3
8    Blue Cloud           3    59.0    8    11.75    5.0   -     66           66    +66
9    A Touch Of Sugar     2    56.0    9    11.80    0.0   60    70           70    +10
10   She's A Klawer       2    60.0    10   21.00    0.0   52    78           78    +26
99   Marieskop            3    57.5    99   0.00     5.0   -     63           63    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Regal Daughter 76 80 76 +4 0.0 -
2 Kadizora - 72 75 -3 2.5 -
3 Patches Of Grey - 62 72 -10 2.5 -
4 Villa Semaya Line 76 59 76 -17 0.0
5 Dimako's Jet - 93 71 +22 2.5 -
6 Darling Harbour 71 60 71 -11 2.5 -
7 Arctic Commander 73 73 76 -3 0.0 -
8 Blue Cloud - 54 66 -12 5.0 -
9 A Touch Of Sugar 60 58 70 -12 0.0 -
10 She's A Klawer 52 50 78 -28 0.0 -
99 Marieskop - 50 63 -13 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