Official NHA Assessment

Race 5: PLAY SOCCER 6, 10 AND 13 MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Members)

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Line Horse
Mary Read
Reference for assessment
Exact Matches
0 / 14
Calculated = Official
Close Matches
2 / 14
Within 2 points
Significant Diffs
10 / 14
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    Doitwithdiamonds     4    60.0    1    0.00     0.5   65    69           69    +4
2    Key Worker           3    56.0    2    0.75     1.0   -     64           64    +64
3    Mary Read            3    60.0    3    1.75     1.0   71    71           71    +0
4    Duchess Of Seville   4    60.0    4    2.25     0.5   61    72           72    +11
5    Autumn Var           3    60.0    5    6.75     1.0   -     68           68    +68
6    Sierra Sky           3    60.0    6    11.00    1.0   -     68           68    +68
7    Blue Velvet          2    56.0    7    17.50    0.0   -     62           62    +62
8    Ice Spa              2    56.0    8    20.50    0.0   -     62           62    +62
9    Bacardi Babe         3    60.0    9    24.25    1.0   61    68           68    +7
10   Three Bells          3    57.5    10   28.75    1.0   46    63           63    +17
11   Cantkeepasecret      2    56.0    11   33.25    0.0   -     62           62    +62
99   Silky Jet            4    60.0    99   0.00     0.5   -     69           69    +0
99   Magic Bank           2    60.0    99   0.00     0.0   -     70           70    +0
99   Silver Flare         4    56.0    99   0.00     0.5   -     61           61    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Doitwithdiamonds 65 99 69 +30 0.5 -
2 Key Worker - 84 64 +20 1.0 -
3 Mary Read Line 71 57 71 -14 1.0
4 Duchess Of Seville 61 53 72 -19 0.5 -
5 Autumn Var - 67 68 -1 1.0 -
6 Sierra Sky - 45 68 -23 1.0 -
7 Blue Velvet - 60 62 -2 0.0 -
8 Ice Spa - 45 62 -17 0.0 -
9 Bacardi Babe 61 56 68 -12 1.0 -
10 Three Bells 46 43 63 -20 1.0 -
11 Cantkeepasecret - 57 62 -5 0.0 -
99 Silky Jet - 61 69 -8 0.5 -
99 Magic Bank - 42 70 -28 0.0 -
99 Silver Flare - 64 61 +3 0.5 -
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