Official NHA Assessment

Race 4: TAB TELEBET 0861 000 822 MAIDEN HANDICAP (F & M) (Maiden(F&M) R15000 Win bonus ROA Members)

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Line Horse
Magenta
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
5 / 12
Within 2 points
Significant Diffs
3 / 12
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    Lily Of Orange       3    52.0    1    0.00     3.0   50    48           50    +0
2    Red Centre           2    57.0    2    0.75     0.0   67    68           68    +1
3    Magenta              4    53.0    3    2.25     2.0   55    55           55    +0
4    Elusive Jewel        2    52.0    4    3.00     0.0   55    56           56    +1
5    Afrodite             3    60.0    5    5.50     3.0   73    64           64    -9
6    Sundrop              6    53.0    6    6.75     0.0   52    56           56    +4
7    Texas Tornado        2    54.5    7    10.75    0.0   62    59           59    -3
8    Antonia Augusta      2    52.5    8    13.00    0.0   55    55           55    +0
9    Karoo Magic          2    53.5    9    18.50    0.0   60    57           57    -3
10   Mercurial Jet        3    58.0    10   22.50    3.0   62    60           60    -2
11   Spring Fever         2    52.0    11   22.55    0.0   54    54           54    +0
99   Yaya Maria           2    58.5    99   0.00     0.0   -     67           67    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Lily Of Orange 50 55 50 +5 3.0 -
2 Red Centre 67 72 68 +4 0.0 -
3 Magenta Line 55 59 55 +4 2.0
4 Elusive Jewel 55 57 56 +1 0.0 -
5 Afrodite 73 56 64 -8 3.0 -
6 Sundrop 52 48 56 -8 0.0 -
7 Texas Tornado 62 55 59 -4 0.0 -
8 Antonia Augusta 55 57 55 +2 0.0 -
9 Karoo Magic 60 58 57 +1 0.0 -
10 Mercurial Jet 62 59 60 -1 3.0 -
11 Spring Fever 54 53 54 -1 0.0 -
99 Yaya Maria - 60 67 -7 0.0 -
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