Official NHA Assessment

Race 3: www.tabgold.co.za MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Priory Terrace
Reference for assessment
Exact Matches
2 / 11
Calculated = Official
Close Matches
2 / 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    Are You Sure         2    60.0    1    0.00     1.0   73    2            2     -71
2    Priory Terrace       3    60.0    2    2.00     2.0   -     -            -     +0
3    Chimes At Midnight   3    60.0    3    4.50     2.0   -     -            -     +0
4    Dream Decision       3    60.0    4    6.10     2.0   -     -            -     +0
5    Miss Twinkle         3    60.0    5    9.70     2.0   -     -            -     +0
6    Vinny's Dream        3    60.0    6    9.85     2.0   -     -            -     +0
7    Little Piaf          2    57.0    7    11.95    1.0   -     -4           -     +0
8    Capricious Miss      3    60.0    8    14.55    2.0   -     -            -     +0
9    Oh Good Gosh         3    60.0    9    23.35    2.0   -     -            -     +0
10   Emmas Palace         4    60.0    10   30.95    2.5   -     -1           -     +0
99   Lucienne             3    60.0    99   0.00     2.0   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Are You Sure 73 64 2 +62 1.0 -
2 Priory Terrace Line - 66 - +66 2.0
3 Chimes At Midnight (ZIM) - 60 - +60 2.0 -
4 Dream Decision - 53 - +53 2.0 -
5 Miss Twinkle - 86 - +86 2.0 -
6 Vinny's Dream - 45 - +45 2.0 -
7 Little Piaf - 60 - +60 1.0 -
8 Capricious Miss - 60 - +60 2.0 -
9 Oh Good Gosh - - - ✓ Match 2.0 -
10 Emmas Palace - - - ✓ Match 2.5 -
99 Lucienne - 76 - - 2.0 -
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