Official NHA Assessment

Race 2: BETONTAB.CO.ZA MAIDEN PLATE (For all Maidens)

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Line Horse
Knave Of Diamonds
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
7 / 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    Notorix              6    60.0    1    0.00     0.0   65    7            7     -58
2    Trumps Express       4    60.0    2    0.25     4.0   58    -1           48    -10
3    Knave Of Diamonds    3    60.0    3    0.30     3.5   -     -            -     +0
4    Captains Walk        3    60.0    4    4.55     3.5   45    -            42    -3
5    My Lord And Master   4    60.0    5    5.05     4.0   56    -1           46    -10
6    Dawn Raider          4    60.0    6    5.80     4.0   61    -1           51    -10
7    Broadway             4    60.0    7    8.05     4.0   50    -1           40    -10
8    King Of Luv          4    60.0    8    8.15     4.0   -     -1           -     +0
9    Act Of Thunder       4    60.0    9    10.65    4.0   60    -1           50    -10
10   Cashing In           3    60.0    10   11.15    3.5   62    -            53    -9
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Notorix 65 68 7 +61 0.0 -
2 Trumps Express 58 55 48 +7 4.0 -
3 Knave Of Diamonds Line - 57 - +57 3.5
4 Captains Walk 45 54 42 +12 3.5 -
5 My Lord And Master 56 55 46 +9 4.0 -
6 Dawn Raider 61 53 51 +2 4.0 -
7 Broadway 50 59 40 +19 4.0 -
8 King Of Luv - 48 - +48 4.0 -
9 Act Of Thunder 60 55 50 +5 4.0 -
10 Cashing In 62 56 53 +3 3.5 -
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